From patchwork Thu Mar 31 08:29:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qin Jian X-Patchwork-Id: 555369 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22CE2C433F5 for ; Thu, 31 Mar 2022 08:36:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232081AbiCaIik (ORCPT ); Thu, 31 Mar 2022 04:38:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232943AbiCaIii (ORCPT ); Thu, 31 Mar 2022 04:38:38 -0400 Received: from mx1.cqplus1.com (unknown [113.204.237.245]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 058611F045A for ; Thu, 31 Mar 2022 01:36:42 -0700 (PDT) X-MailGates: (flag:4,DYNAMIC,BADHELO,RELAY,NOHOST:PASS)(compute_score:DE LIVER,40,3) Received: from 172.28.114.216 by mx1.cqplus1.com with MailGates ESMTP Server V5.0(1188:0:AUTH_RELAY) (envelope-from ); Thu, 31 Mar 2022 16:28:59 +0800 (CST) From: Qin Jian To: krzysztof.kozlowski@canonical.com Cc: robh+dt@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, tglx@linutronix.de, maz@kernel.org, p.zabel@pengutronix.de, linux@armlinux.org.uk, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Qin Jian Subject: [PATCH v12 2/9] dt-bindings: reset: Add bindings for SP7021 reset driver Date: Thu, 31 Mar 2022 16:29:49 +0800 Message-Id: <6abf8de01fa2f24e13e9b78b3dc3b206ea551c9c.1648714851.git.qinjian@cqplus1.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add documentation to describe Sunplus SP7021 reset driver bindings. Signed-off-by: Qin Jian --- Move "reg' after 'compatible' --- .../bindings/reset/sunplus,reset.yaml | 38 ++++++++ MAINTAINERS | 2 + include/dt-bindings/reset/sp-sp7021.h | 97 +++++++++++++++++++ 3 files changed, 137 insertions(+) create mode 100644 Documentation/devicetree/bindings/reset/sunplus,reset.yaml create mode 100644 include/dt-bindings/reset/sp-sp7021.h diff --git a/Documentation/devicetree/bindings/reset/sunplus,reset.yaml b/Documentation/devicetree/bindings/reset/sunplus,reset.yaml new file mode 100644 index 000000000..f24646ba9 --- /dev/null +++ b/Documentation/devicetree/bindings/reset/sunplus,reset.yaml @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) Sunplus Co., Ltd. 2021 +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/reset/sunplus,reset.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Sunplus SoC Reset Controller + +maintainers: + - Qin Jian + +properties: + compatible: + const: sunplus,sp7021-reset + + reg: + maxItems: 1 + + "#reset-cells": + const: 1 + +required: + - compatible + - reg + - "#reset-cells" + +additionalProperties: false + +examples: + - | + rstc: reset@9c000054 { + compatible = "sunplus,sp7021-reset"; + reg = <0x9c000054 0x28>; + #reset-cells = <1>; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 8b5e2e639..a8be86b25 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2744,6 +2744,8 @@ L: linux-arm-kernel@lists.infradead.org (moderated for mon-subscribers) S: Maintained W: https://sunplus-tibbo.atlassian.net/wiki/spaces/doc/overview F: Documentation/devicetree/bindings/arm/sunplus,sp7021.yaml +F: Documentation/devicetree/bindings/reset/sunplus,reset.yaml +F: include/dt-bindings/reset/sp-sp7021.h ARM/Synaptics SoC support M: Jisheng Zhang diff --git a/include/dt-bindings/reset/sp-sp7021.h b/include/dt-bindings/reset/sp-sp7021.h new file mode 100644 index 000000000..fd2a50327 --- /dev/null +++ b/include/dt-bindings/reset/sp-sp7021.h @@ -0,0 +1,97 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ +/* + * Copyright (C) Sunplus Technology Co., Ltd. + * All rights reserved. + */ +#ifndef _DT_BINDINGS_RST_SUNPLUS_SP7021_H +#define _DT_BINDINGS_RST_SUNPLUS_SP7021_H + +/* mo_reset0 ~ mo_reset9 */ +#define RST_SYSTEM 0x00 +#define RST_RTC 0x02 +#define RST_IOCTL 0x03 +#define RST_IOP 0x04 +#define RST_OTPRX 0x05 +#define RST_NOC 0x06 +#define RST_BR 0x07 +#define RST_RBUS_L00 0x08 +#define RST_SPIFL 0x09 +#define RST_SDCTRL0 0x0a +#define RST_PERI0 0x0b +#define RST_A926 0x0d +#define RST_UMCTL2 0x0e +#define RST_PERI1 0x0f + +#define RST_DDR_PHY0 0x10 +#define RST_ACHIP 0x12 +#define RST_STC0 0x14 +#define RST_STC_AV0 0x15 +#define RST_STC_AV1 0x16 +#define RST_STC_AV2 0x17 +#define RST_UA0 0x18 +#define RST_UA1 0x19 +#define RST_UA2 0x1a +#define RST_UA3 0x1b +#define RST_UA4 0x1c +#define RST_HWUA 0x1d +#define RST_DDC0 0x1e +#define RST_UADMA 0x1f + +#define RST_CBDMA0 0x20 +#define RST_CBDMA1 0x21 +#define RST_SPI_COMBO_0 0x22 +#define RST_SPI_COMBO_1 0x23 +#define RST_SPI_COMBO_2 0x24 +#define RST_SPI_COMBO_3 0x25 +#define RST_AUD 0x26 +#define RST_USBC0 0x2a +#define RST_USBC1 0x2b +#define RST_UPHY0 0x2d +#define RST_UPHY1 0x2e + +#define RST_I2CM0 0x30 +#define RST_I2CM1 0x31 +#define RST_I2CM2 0x32 +#define RST_I2CM3 0x33 +#define RST_PMC 0x3d +#define RST_CARD_CTL0 0x3e +#define RST_CARD_CTL1 0x3f + +#define RST_CARD_CTL4 0x42 +#define RST_BCH 0x44 +#define RST_DDFCH 0x4b +#define RST_CSIIW0 0x4c +#define RST_CSIIW1 0x4d +#define RST_MIPICSI0 0x4e +#define RST_MIPICSI1 0x4f + +#define RST_HDMI_TX 0x50 +#define RST_VPOST 0x55 + +#define RST_TGEN 0x60 +#define RST_DMIX 0x61 +#define RST_TCON 0x6a +#define RST_INTERRUPT 0x6f + +#define RST_RGST 0x70 +#define RST_GPIO 0x73 +#define RST_RBUS_TOP 0x74 + +#define RST_MAILBOX 0x86 +#define RST_SPIND 0x8a +#define RST_I2C2CBUS 0x8b +#define RST_SEC 0x8d +#define RST_DVE 0x8e +#define RST_GPOST0 0x8f + +#define RST_OSD0 0x90 +#define RST_DISP_PWM 0x92 +#define RST_UADBG 0x93 +#define RST_DUMMY_MASTER 0x94 +#define RST_FIO_CTL 0x95 +#define RST_FPGA 0x96 +#define RST_L2SW 0x97 +#define RST_ICM 0x98 +#define RST_AXI_GLOBAL 0x99 + +#endif From patchwork Thu Mar 31 08:29:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qin Jian X-Patchwork-Id: 555368 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC0DBC4332F for ; Thu, 31 Mar 2022 08:37:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232947AbiCaIiu (ORCPT ); Thu, 31 Mar 2022 04:38:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232960AbiCaIiu (ORCPT ); Thu, 31 Mar 2022 04:38:50 -0400 Received: from mx1.cqplus1.com (unknown [113.204.237.245]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id ABC291EF5EF for ; Thu, 31 Mar 2022 01:36:37 -0700 (PDT) X-MailGates: (flag:4,DYNAMIC,BADHELO,RELAY,NOHOST:PASS)(compute_score:DE LIVER,40,3) Received: from 172.28.114.216 by mx1.cqplus1.com with MailGates ESMTP Server V5.0(1188:0:AUTH_RELAY) (envelope-from ); Thu, 31 Mar 2022 16:29:00 +0800 (CST) From: Qin Jian To: krzysztof.kozlowski@canonical.com Cc: robh+dt@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, tglx@linutronix.de, maz@kernel.org, p.zabel@pengutronix.de, linux@armlinux.org.uk, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Qin Jian Subject: [PATCH v12 3/9] reset: Add Sunplus SP7021 reset driver Date: Thu, 31 Mar 2022 16:29:50 +0800 Message-Id: <840bf90d4e7ba05fe621cd94101b912162311e41.1648714851.git.qinjian@cqplus1.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add reset driver for Sunplus SP7021 SoC. Reviewed-by: Philipp Zabel Signed-off-by: Qin Jian --- MAINTAINERS | 1 + drivers/reset/Kconfig | 9 +++ drivers/reset/Makefile | 1 + drivers/reset/reset-sunplus.c | 130 ++++++++++++++++++++++++++++++++++ 4 files changed, 141 insertions(+) create mode 100644 drivers/reset/reset-sunplus.c diff --git a/MAINTAINERS b/MAINTAINERS index a8be86b25..26066f199 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2745,6 +2745,7 @@ S: Maintained W: https://sunplus-tibbo.atlassian.net/wiki/spaces/doc/overview F: Documentation/devicetree/bindings/arm/sunplus,sp7021.yaml F: Documentation/devicetree/bindings/reset/sunplus,reset.yaml +F: drivers/reset/reset-sunplus.c F: include/dt-bindings/reset/sp-sp7021.h ARM/Synaptics SoC support diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 6f8ba0ddc..36825787e 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -231,6 +231,15 @@ config RESET_STARFIVE_JH7100 help This enables the reset controller driver for the StarFive JH7100 SoC. +config RESET_SUNPLUS + bool "Sunplus SoCs Reset Driver" if COMPILE_TEST + default ARCH_SUNPLUS + help + This enables the reset driver support for Sunplus SoCs. + The reset lines that can be asserted and deasserted by toggling bits + in a contiguous, exclusive register space. The register is HIWORD_MASKED, + which means each register hold 16 reset lines. + config RESET_SUNXI bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI default ARCH_SUNXI diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index bd0a97be1..cadc46d3e 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -30,6 +30,7 @@ obj-$(CONFIG_RESET_SCMI) += reset-scmi.o obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o obj-$(CONFIG_RESET_SOCFPGA) += reset-socfpga.o obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o +obj-$(CONFIG_RESET_SUNPLUS) += reset-sunplus.o obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o diff --git a/drivers/reset/reset-sunplus.c b/drivers/reset/reset-sunplus.c new file mode 100644 index 000000000..113b36b57 --- /dev/null +++ b/drivers/reset/reset-sunplus.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* + * SP7021 reset driver + * + * Copyright (C) Sunplus Technology Co., Ltd. + * All rights reserved. + */ + +#include +#include +#include +#include +#include +#include + +/* HIWORD_MASK_REG BITS */ +#define BITS_PER_HWM_REG 16 + +struct sp_reset { + struct reset_controller_dev rcdev; + struct notifier_block notifier; + void __iomem *base; +}; + +static inline struct sp_reset *to_sp_reset(struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct sp_reset, rcdev); +} + +static int sp_reset_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct sp_reset *reset = to_sp_reset(rcdev); + int index = id / BITS_PER_HWM_REG; + int shift = id % BITS_PER_HWM_REG; + u32 val; + + val = (1 << (16 + shift)) | (assert << shift); + writel(val, reset->base + (index * 4)); + + return 0; +} + +static int sp_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return sp_reset_update(rcdev, id, true); +} + +static int sp_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return sp_reset_update(rcdev, id, false); +} + +static int sp_reset_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct sp_reset *reset = to_sp_reset(rcdev); + int index = id / BITS_PER_HWM_REG; + int shift = id % BITS_PER_HWM_REG; + u32 reg; + + reg = readl(reset->base + (index * 4)); + + return !!(reg & BIT(shift)); +} + +static const struct reset_control_ops sp_reset_ops = { + .assert = sp_reset_assert, + .deassert = sp_reset_deassert, + .status = sp_reset_status, +}; + +static int sp_restart(struct notifier_block *nb, unsigned long mode, + void *cmd) +{ + struct sp_reset *reset = container_of(nb, struct sp_reset, notifier); + + sp_reset_assert(&reset->rcdev, 0); + sp_reset_deassert(&reset->rcdev, 0); + + return NOTIFY_DONE; +} + +static int sp_reset_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct sp_reset *reset; + struct resource *res; + int ret; + + reset = devm_kzalloc(dev, sizeof(*reset), GFP_KERNEL); + if (!reset) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + reset->base = devm_ioremap_resource(dev, res); + if (IS_ERR(reset->base)) + return PTR_ERR(reset->base); + + reset->rcdev.ops = &sp_reset_ops; + reset->rcdev.owner = THIS_MODULE; + reset->rcdev.of_node = dev->of_node; + reset->rcdev.nr_resets = resource_size(res) / 4 * BITS_PER_HWM_REG; + + ret = devm_reset_controller_register(dev, &reset->rcdev); + if (ret) + return ret; + + reset->notifier.notifier_call = sp_restart; + reset->notifier.priority = 192; + + return register_restart_handler(&reset->notifier); +} + +static const struct of_device_id sp_reset_dt_ids[] = { + {.compatible = "sunplus,sp7021-reset",}, + { /* sentinel */ }, +}; + +static struct platform_driver sp_reset_driver = { + .probe = sp_reset_probe, + .driver = { + .name = "sunplus-reset", + .of_match_table = sp_reset_dt_ids, + .suppress_bind_attrs = true, + }, +}; +builtin_platform_driver(sp_reset_driver); From patchwork Thu Mar 31 08:29:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qin Jian X-Patchwork-Id: 555366 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79771C433FE for ; Thu, 31 Mar 2022 08:37:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232997AbiCaIjG (ORCPT ); Thu, 31 Mar 2022 04:39:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232999AbiCaIjB (ORCPT ); Thu, 31 Mar 2022 04:39:01 -0400 Received: from mx1.cqplus1.com (unknown [113.204.237.245]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 055CB1F0453 for ; Thu, 31 Mar 2022 01:36:41 -0700 (PDT) X-MailGates: (flag:4,DYNAMIC,BADHELO,RELAY,NOHOST:PASS)(compute_score:DE LIVER,40,3) Received: from 172.28.114.216 by mx1.cqplus1.com with MailGates ESMTP Server V5.0(1188:0:AUTH_RELAY) (envelope-from ); Thu, 31 Mar 2022 16:29:00 +0800 (CST) From: Qin Jian To: krzysztof.kozlowski@canonical.com Cc: robh+dt@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, tglx@linutronix.de, maz@kernel.org, p.zabel@pengutronix.de, linux@armlinux.org.uk, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Qin Jian Subject: [PATCH v12 5/9] clk: Add Sunplus SP7021 clock driver Date: Thu, 31 Mar 2022 16:29:52 +0800 Message-Id: X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add clock driver for Sunplus SP7021 SoC. Signed-off-by: Qin Jian --- MAINTAINERS | 1 + drivers/clk/Kconfig | 10 + drivers/clk/Makefile | 1 + drivers/clk/clk-sp7021.c | 736 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 748 insertions(+) create mode 100644 drivers/clk/clk-sp7021.c diff --git a/MAINTAINERS b/MAINTAINERS index 5d8b420d0..8b77f7ae4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2746,6 +2746,7 @@ W: https://sunplus-tibbo.atlassian.net/wiki/spaces/doc/overview F: Documentation/devicetree/bindings/arm/sunplus,sp7021.yaml F: Documentation/devicetree/bindings/clock/sunplus,sp7021-clkc.yaml F: Documentation/devicetree/bindings/reset/sunplus,reset.yaml +F: drivers/clk/clk-sp7021.c F: drivers/reset/reset-sunplus.c F: include/dt-bindings/clock/sp-sp7021.h F: include/dt-bindings/reset/sp-sp7021.h diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index d4d67fbae..9eedeea78 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -351,6 +351,16 @@ config COMMON_CLK_VC5 This driver supports the IDT VersaClock 5 and VersaClock 6 programmable clock generators. +config COMMON_CLK_SP7021 + bool "Clock driver for Sunplus SP7021 SoC" + depends on SOC_SP7021 || COMPILE_TEST + default SOC_SP7021 + help + This driver supports the Sunplus SP7021 SoC clocks. + It implements SP7021 PLLs/gate. + Not all features of the PLL are currently supported + by the driver. + config COMMON_CLK_STM32MP157 def_bool COMMON_CLK && MACH_STM32MP157 help diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 16e588630..377ea7f7b 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_COMMON_CLK_SI5351) += clk-si5351.o obj-$(CONFIG_COMMON_CLK_SI514) += clk-si514.o obj-$(CONFIG_COMMON_CLK_SI544) += clk-si544.o obj-$(CONFIG_COMMON_CLK_SI570) += clk-si570.o +obj-$(CONFIG_COMMON_CLK_SP7021) += clk-sp7021.o obj-$(CONFIG_COMMON_CLK_STM32F) += clk-stm32f4.o obj-$(CONFIG_COMMON_CLK_STM32H7) += clk-stm32h7.o obj-$(CONFIG_COMMON_CLK_STM32MP157) += clk-stm32mp1.o diff --git a/drivers/clk/clk-sp7021.c b/drivers/clk/clk-sp7021.c new file mode 100644 index 000000000..4331a9dde --- /dev/null +++ b/drivers/clk/clk-sp7021.c @@ -0,0 +1,736 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* + * Copyright (C) Sunplus Technology Co., Ltd. + * All rights reserved. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define REG(i) (pll_regs + (i) * 4) + +#define PLLA_CTL REG(7) +#define PLLE_CTL REG(12) +#define PLLF_CTL REG(13) +#define PLLTV_CTL REG(14) +#define PLLSYS_CTL REG(26) + +/* speical div_width values for PLLTV/PLLA */ +#define DIV_TV 33 +#define DIV_A 34 + +/* PLLTV parameters */ +enum { + SEL_FRA, + SDM_MOD, + PH_SEL, + NFRA, + DIVR, + DIVN, + DIVM, + P_MAX +}; + +#define MASK_SEL_FRA GENMASK(1, 1) +#define MASK_SDM_MOD GENMASK(2, 2) +#define MASK_PH_SEL GENMASK(4, 4) +#define MASK_NFRA GENMASK(12, 6) +#define MASK_DIVR GENMASK(8, 7) +#define MASK_DIVN GENMASK(7, 0) +#define MASK_DIVM GENMASK(14, 8) + +/* HIWORD_MASK FIELD_PREP */ +#define HWM_FIELD_PREP(mask, value) \ +({ \ + u32 m = mask; \ + (m << 16) | FIELD_PREP(m, value); \ +}) + +struct sp_pll { + struct clk_hw hw; + void __iomem *reg; + spinlock_t *lock; /* lock for reg */ + int div_shift; + int div_width; + int pd_bit; /* power down bit idx */ + int bp_bit; /* bypass bit idx */ + unsigned long brate; /* base rate, TODO: replace brate with muldiv */ + u32 p[P_MAX]; /* for hold PLLTV/PLLA parameters */ +}; + +#define to_sp_pll(_hw) container_of(_hw, struct sp_pll, hw) + +#define clk_regs (sp_clk_base + 0x000) /* G0 ~ CLKEN */ +#define pll_regs (sp_clk_base + 0x200) /* G4 ~ PLL */ +static void __iomem *sp_clk_base; +static struct clk_hw_onecell_data *sp_clk_data; + +#define F_EXTCLK BIT(16) /* parent clock is EXTCLK */ + +static const u32 sp_clk_gates[] = { + CLK_RTC, + CLK_OTPRX, + CLK_NOC, + CLK_BR, + CLK_SPIFL, + CLK_PERI0 | F_EXTCLK, + CLK_PERI1 | F_EXTCLK, + + CLK_STC0, + CLK_STC_AV0, + CLK_STC_AV1, + CLK_STC_AV2, + CLK_UA0 | F_EXTCLK, + CLK_UA1 | F_EXTCLK, + CLK_UA2 | F_EXTCLK, + CLK_UA3 | F_EXTCLK, + CLK_UA4 | F_EXTCLK, + CLK_HWUA | F_EXTCLK, + CLK_DDC0, + CLK_UADMA | F_EXTCLK, + + CLK_CBDMA0, + CLK_CBDMA1, + CLK_SPI_COMBO_0, + CLK_SPI_COMBO_1, + CLK_SPI_COMBO_2, + CLK_SPI_COMBO_3, + CLK_AUD, + CLK_USBC0, + CLK_USBC1, + CLK_UPHY0, + CLK_UPHY1, + + CLK_I2CM0, + CLK_I2CM1, + CLK_I2CM2, + CLK_I2CM3, + CLK_PMC, + CLK_CARD_CTL0, + CLK_CARD_CTL1, + + CLK_CARD_CTL4, + CLK_BCH, + CLK_DDFCH, + CLK_CSIIW0, + CLK_CSIIW1, + CLK_MIPICSI0, + CLK_MIPICSI1, + + CLK_HDMI_TX, + CLK_VPOST, + + CLK_TGEN, + CLK_DMIX, + CLK_TCON, + + CLK_GPIO, + + CLK_MAILBOX, + CLK_SPIND, + CLK_I2C2CBUS, + CLK_SEC, + CLK_GPOST0, + CLK_DVE, + + CLK_OSD0, + CLK_DISP_PWM, + CLK_UADBG, + CLK_DUMMY_MASTER, + CLK_FIO_CTL, + CLK_FPGA, + CLK_L2SW, + CLK_ICM, + CLK_AXI_GLOBAL, +}; + +static DEFINE_SPINLOCK(plla_lock); +static DEFINE_SPINLOCK(plle_lock); +static DEFINE_SPINLOCK(pllf_lock); +static DEFINE_SPINLOCK(pllsys_lock); +static DEFINE_SPINLOCK(plltv_lock); + +#define _M 1000000UL +#define F_27M (27 * _M) + +/*********************************** PLL_TV **********************************/ + +/* TODO: set proper FVCO range */ +#define FVCO_MIN (100 * _M) +#define FVCO_MAX (200 * _M) + +#define F_MIN (FVCO_MIN / 8) +#define F_MAX (FVCO_MAX) + +static long plltv_integer_div(struct sp_pll *clk, unsigned long freq) +{ + /* valid m values: 27M must be divisible by m, 0 means end */ + static const u32 m_table[] = { + 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32, 0 + }; + u32 m, n, r; + unsigned long fvco, nf; + + freq = clamp(freq, F_MIN, F_MAX); + + /* DIVR 0~3 */ + for (r = 0; r <= 3; r++) { + fvco = freq << r; + if (fvco <= FVCO_MAX) + break; + } + + /* DIVM */ + for (m = 0; m_table[m]; m++) { + nf = fvco * m_table[m]; + n = nf / F_27M; + if ((n * F_27M) == nf) + break; + } + m = m_table[m]; + + if (!m) { + pr_err("%s: %s freq:%lu not found a valid setting\n", + __func__, clk_hw_get_name(&clk->hw), freq); + return -EINVAL; + } + + /* save parameters */ + clk->p[SEL_FRA] = 0; + clk->p[DIVR] = r; + clk->p[DIVN] = n; + clk->p[DIVM] = m; + + return freq; +} + +/* parameters for PLLTV fractional divider */ +static const u32 pt[][5] = { + /* conventional fractional */ + { + 1, // factor + 5, // 5 * p0 (nint) + 1, // 1 * p0 + F_27M, // F_27M / p0 + 1, // p0 / p2 + }, + /* phase rotation */ + { + 10, // factor + 54, // 5.4 * p0 (nint) + 2, // 0.2 * p0 + F_27M / 10, // F_27M / p0 + 5, // p0 / p2 + }, +}; + +static const u32 mods[] = { 91, 55 }; /* SDM_MOD mod values */ + +static long plltv_fractional_div(struct sp_pll *clk, unsigned long freq) +{ + u32 m, r; + u32 nint, nfra; + u32 df_quotient_min = 210000000; + u32 df_remainder_min = 0; + unsigned long fvco, nf, f, fout = 0; + int sdm, ph; + + freq = clamp(freq, F_MIN, F_MAX); + + /* DIVR 0~3 */ + for (r = 0; r <= 3; r++) { + fvco = freq << r; + if (fvco <= FVCO_MAX) + break; + } + f = F_27M >> r; + + /* PH_SEL 1/0 */ + for (ph = 1; ph >= 0; ph--) { + const u32 *pp = pt[ph]; + u32 ms = 1; + + /* SDM_MOD 0/1 */ + for (sdm = 0; sdm <= 1; sdm++) { + u32 mod = mods[sdm]; + + /* DIVM 1~32 */ + for (m = ms; m <= 32; m++) { + u32 df; /* diff freq */ + u32 df_quotient, df_remainder; + + nf = fvco * m; + nint = nf / pp[3]; + + if (nint < pp[1]) + continue; + if (nint > pp[1]) + break; + + nfra = (((nf % pp[3]) * mod * pp[4]) + (F_27M / 2)) / F_27M; + if (nfra) + df = (f * (nint + pp[2]) / pp[0]) - + (f * (mod - nfra) / mod / pp[4]); + else + df = (f * (nint) / pp[0]); + + df_quotient = df / m; + df_remainder = ((df % m) * 1000) / m; + + if (freq > df_quotient) { + df_quotient = freq - df_quotient - 1; + df_remainder = 1000 - df_remainder; + } else { + df_quotient = df_quotient - freq; + } + + if (df_quotient_min > df_quotient || + (df_quotient_min == df_quotient && + df_remainder_min > df_remainder)) { + /* found a closer freq, save parameters */ + clk->p[SEL_FRA] = 1; + clk->p[SDM_MOD] = sdm; + clk->p[PH_SEL] = ph; + clk->p[NFRA] = nfra; + clk->p[DIVR] = r; + clk->p[DIVM] = m; + + fout = df / m; + df_quotient_min = df_quotient; + df_remainder_min = df_remainder; + } + } + } + } + + if (!fout) { + pr_err("%s: %s freq:%lu not found a valid setting\n", + __func__, clk_hw_get_name(&clk->hw), freq); + return -EINVAL; + } + + return fout; +} + +static long plltv_div(struct sp_pll *clk, unsigned long freq) +{ + if (freq % 100) + return plltv_fractional_div(clk, freq); + + return plltv_integer_div(clk, freq); +} + +static void plltv_set_rate(struct sp_pll *clk) +{ + u32 reg; + + reg = HWM_FIELD_PREP(MASK_SEL_FRA, clk->p[SEL_FRA]); + reg |= HWM_FIELD_PREP(MASK_SDM_MOD, clk->p[SDM_MOD]); + reg |= HWM_FIELD_PREP(MASK_PH_SEL, clk->p[PH_SEL]); + reg |= HWM_FIELD_PREP(MASK_NFRA, clk->p[NFRA]); + writel(reg, clk->reg); + + reg = HWM_FIELD_PREP(MASK_DIVR, clk->p[DIVR]); + writel(reg, clk->reg + 4); + + reg = HWM_FIELD_PREP(MASK_DIVN, clk->p[DIVN] - 1); + reg |= HWM_FIELD_PREP(MASK_DIVM, clk->p[DIVM] - 1); + writel(reg, clk->reg + 8); +} + +/*********************************** PLL_A ***********************************/ + +/* from Q628_PLLs_REG_setting.xlsx */ +static const struct { + u32 rate; + u32 regs[5]; +} pa[] = { + { + .rate = 135475200, + .regs = { + 0x4801, + 0x02df, + 0x248f, + 0x0211, + 0x33e9 + } + }, + { + .rate = 147456000, + .regs = { + 0x4801, + 0x1adf, + 0x2490, + 0x0349, + 0x33e9 + } + }, + { + .rate = 196608000, + .regs = { + 0x4801, + 0x42ef, + 0x2495, + 0x01c6, + 0x33e9 + } + }, +}; + +static void plla_set_rate(struct sp_pll *clk) +{ + const u32 *pp = pa[clk->p[0]].regs; + int i; + + for (i = 0; i < ARRAY_SIZE(pa->regs); i++) + writel(0xffff0000 | pp[i], clk->reg + (i * 4)); +} + +static long plla_round_rate(struct sp_pll *clk, unsigned long rate) +{ + int i = ARRAY_SIZE(pa); + + while (--i) { + if (rate >= pa[i].rate) + break; + } + clk->p[0] = i; + + return pa[i].rate; +} + +/********************************** SP_PLL ***********************************/ + +static long sp_pll_calc_div(struct sp_pll *clk, unsigned long rate) +{ + u32 fbdiv; + u32 max = 1 << clk->div_width; + + fbdiv = DIV_ROUND_CLOSEST(rate, clk->brate); + if (fbdiv > max) + fbdiv = max; + + return fbdiv; +} + +static long sp_pll_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct sp_pll *clk = to_sp_pll(hw); + long ret; + + if (rate == *prate) { + ret = *prate; /* bypass */ + } else if (clk->div_width == DIV_A) { + ret = plla_round_rate(clk, rate); + } else if (clk->div_width == DIV_TV) { + ret = plltv_div(clk, rate); + if (ret < 0) + ret = *prate; + } else { + ret = sp_pll_calc_div(clk, rate) * clk->brate; + } + + return ret; +} + +static unsigned long sp_pll_recalc_rate(struct clk_hw *hw, + unsigned long prate) +{ + struct sp_pll *clk = to_sp_pll(hw); + u32 reg = readl(clk->reg); + unsigned long ret; + + if (reg & BIT(clk->bp_bit)) { + ret = prate; /* bypass */ + } else if (clk->div_width == DIV_A) { + ret = pa[clk->p[0]].rate; + } else if (clk->div_width == DIV_TV) { + u32 m, r, reg2; + + r = FIELD_GET(MASK_DIVR, readl(clk->reg + 4)); + reg2 = readl(clk->reg + 8); + m = FIELD_GET(MASK_DIVM, reg2) + 1; + + if (reg & BIT(1)) { /* SEL_FRA */ + /* fractional divider */ + u32 sdm = FIELD_GET(MASK_SDM_MOD, reg); + u32 ph = FIELD_GET(MASK_PH_SEL, reg); + u32 nfra = FIELD_GET(MASK_NFRA, reg); + const u32 *pp = pt[ph]; + + ret = prate >> r; + ret = (ret * (pp[1] + pp[2]) / pp[0]) - + (ret * (mods[sdm] - nfra) / mods[sdm] / pp[4]); + ret /= m; + } else { + /* integer divider */ + u32 n = FIELD_GET(MASK_DIVN, reg2) + 1; + + ret = (prate / m * n) >> r; + } + } else { + u32 fbdiv = ((reg >> clk->div_shift) & ((1 << clk->div_width) - 1)) + 1; + + ret = clk->brate * fbdiv; + } + + return ret; +} + +static int sp_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long prate) +{ + struct sp_pll *clk = to_sp_pll(hw); + unsigned long flags; + u32 reg; + + spin_lock_irqsave(clk->lock, flags); + + reg = BIT(clk->bp_bit + 16); /* HIWORD_MASK */ + + if (rate == prate) { + reg |= BIT(clk->bp_bit); /* bypass */ + } else if (clk->div_width == DIV_A) { + plla_set_rate(clk); + } else if (clk->div_width == DIV_TV) { + plltv_set_rate(clk); + } else if (clk->div_width) { + u32 fbdiv = sp_pll_calc_div(clk, rate); + u32 mask = GENMASK(clk->div_shift + clk->div_width - 1, clk->div_shift); + + reg |= (mask << 16) | (((fbdiv - 1) << clk->div_shift) & mask); + } + + writel(reg, clk->reg); + + spin_unlock_irqrestore(clk->lock, flags); + + return 0; +} + +static int sp_pll_enable(struct clk_hw *hw) +{ + struct sp_pll *clk = to_sp_pll(hw); + unsigned long flags; + + spin_lock_irqsave(clk->lock, flags); + writel(BIT(clk->pd_bit + 16) | BIT(clk->pd_bit), clk->reg); /* power up */ + spin_unlock_irqrestore(clk->lock, flags); + + return 0; +} + +static void sp_pll_disable(struct clk_hw *hw) +{ + struct sp_pll *clk = to_sp_pll(hw); + unsigned long flags; + + spin_lock_irqsave(clk->lock, flags); + writel(BIT(clk->pd_bit + 16), clk->reg); /* power down */ + spin_unlock_irqrestore(clk->lock, flags); +} + +static int sp_pll_is_enabled(struct clk_hw *hw) +{ + struct sp_pll *clk = to_sp_pll(hw); + + return readl(clk->reg) & BIT(clk->pd_bit); +} + +static const struct clk_ops sp_pll_ops = { + .enable = sp_pll_enable, + .disable = sp_pll_disable, + .is_enabled = sp_pll_is_enabled, + .round_rate = sp_pll_round_rate, + .recalc_rate = sp_pll_recalc_rate, + .set_rate = sp_pll_set_rate +}; + +static const struct clk_ops sp_pll_sub_ops = { + .enable = sp_pll_enable, + .disable = sp_pll_disable, + .is_enabled = sp_pll_is_enabled, + .recalc_rate = sp_pll_recalc_rate, +}; + +static void dbg_clk(struct clk_hw *hw) +{ + const char *name = clk_hw_get_name(hw); + unsigned long rate = clk_hw_get_rate(hw); + + pr_debug("%-20s%lu\n", name, rate); +} + +struct clk_hw *sp_pll_register(struct device *dev, const char *name, + const struct clk_parent_data *parent_data, + void __iomem *reg, int pd_bit, int bp_bit, + unsigned long brate, int shift, int width, + spinlock_t *lock) +{ + struct sp_pll *pll; + struct clk_hw *hw; + struct clk_init_data initd = { + .name = name, + .parent_data = parent_data, + .ops = (bp_bit >= 0) ? &sp_pll_ops : &sp_pll_sub_ops, + .num_parents = 1, + /* system clock, should not be disabled */ + .flags = (reg == PLLSYS_CTL) ? CLK_IS_CRITICAL : 0, + }; + int ret; + + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL); + if (!pll) + return ERR_PTR(-ENOMEM); + + pll->hw.init = &initd; + pll->reg = reg; + pll->pd_bit = pd_bit; + pll->bp_bit = bp_bit; + pll->brate = brate; + pll->div_shift = shift; + pll->div_width = width; + pll->lock = lock; + + hw = &pll->hw; + ret = devm_clk_hw_register(dev, hw); + if (ret) { + kfree(pll); + return ERR_PTR(ret); + } + dbg_clk(hw); + + return hw; +} + +static int sp7021_clk_probe(struct platform_device *pdev) +{ + static const u32 sp_clken[] = { + 0x67ef, 0x03ff, 0xff03, 0xfff0, 0x0004, /* G0.1~5 */ + 0x0000, 0x8000, 0xffff, 0x0040, 0x0000, /* G0.6~10 */ + }; + static struct clk_parent_data pd_ext, pd_sys, pd_e; + struct device *dev = &pdev->dev; + struct clk_hw **hws; + struct resource *res; + int i; + + /* This memory region include multi HW regs in discontinuous order. + * clk driver used some discontinuous areas in the memory region. + * Using devm_platform_ioremap_resource() would conflicted with other drivers. + */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + sp_clk_base = devm_ioremap(dev, res->start, resource_size(res)); + if (!sp_clk_base) + return -ENXIO; + + /* enable default clks */ + for (i = 0; i < ARRAY_SIZE(sp_clken); i++) + writel((sp_clken[i] << 16) | sp_clken[i], sp_clk_base + 4 * (1 + i)); + + sp_clk_data = devm_kzalloc(dev, struct_size(sp_clk_data, hws, CLK_MAX), + GFP_KERNEL); + if (!sp_clk_data) + return -ENOMEM; + + hws = sp_clk_data->hws; + pd_ext.fw_name = "extclk"; + + /* PLL_A */ + hws[PLL_A] = sp_pll_register(dev, "plla", &pd_ext, PLLA_CTL, + 11, 12, 27000000, 0, DIV_A, &plla_lock); + if (IS_ERR(hws[PLL_A])) + return PTR_ERR(hws[PLL_A]); + + /* PLL_E */ + hws[PLL_E] = sp_pll_register(dev, "plle", &pd_ext, PLLE_CTL, + 6, 2, 50000000, 0, 0, &plle_lock); + if (IS_ERR(hws[PLL_E])) + return PTR_ERR(hws[PLL_E]); + pd_e.hw = hws[PLL_E]; + hws[PLL_E_2P5] = sp_pll_register(dev, "plle_2p5", &pd_e, PLLE_CTL, + 13, -1, 2500000, 0, 0, &plle_lock); + if (IS_ERR(hws[PLL_E_2P5])) + return PTR_ERR(hws[PLL_E_2P5]); + hws[PLL_E_25] = sp_pll_register(dev, "plle_25", &pd_e, PLLE_CTL, + 12, -1, 25000000, 0, 0, &plle_lock); + if (IS_ERR(hws[PLL_E_25])) + return PTR_ERR(hws[PLL_E_25]); + hws[PLL_E_112P5] = sp_pll_register(dev, "plle_112p5", &pd_e, PLLE_CTL, + 11, -1, 112500000, 0, 0, &plle_lock); + if (IS_ERR(hws[PLL_E_112P5])) + return PTR_ERR(hws[PLL_E_112P5]); + + /* PLL_F */ + hws[PLL_F] = sp_pll_register(dev, "pllf", &pd_ext, PLLF_CTL, + 0, 10, 13500000, 1, 4, &pllf_lock); + if (IS_ERR(hws[PLL_F])) + return PTR_ERR(hws[PLL_F]); + + /* PLL_TV */ + hws[PLL_TV] = sp_pll_register(dev, "plltv", &pd_ext, PLLTV_CTL, + 0, 15, 27000000, 0, DIV_TV, &plltv_lock); + if (IS_ERR(hws[PLL_TV])) + return PTR_ERR(hws[PLL_TV]); + hws[PLL_TV_A] = devm_clk_hw_register_divider(dev, "plltv_a", "plltv", 0, + PLLTV_CTL + 4, 5, 1, + CLK_DIVIDER_POWER_OF_TWO, + &plltv_lock); + if (IS_ERR(hws[PLL_TV_A])) + return PTR_ERR(hws[PLL_TV_A]); + dbg_clk(hws[PLL_TV_A]); + + /* PLL_SYS */ + hws[PLL_SYS] = sp_pll_register(dev, "pllsys", &pd_ext, PLLSYS_CTL, + 10, 9, 13500000, 0, 4, &pllsys_lock); + if (IS_ERR(hws[PLL_SYS])) + return PTR_ERR(hws[PLL_SYS]); + pd_sys.hw = hws[PLL_SYS]; + + /* gates */ + for (i = 0; i < ARRAY_SIZE(sp_clk_gates); i++) { + u32 f = sp_clk_gates[i]; + int j = f & 0xffff; + struct clk_parent_data *pd = (f & F_EXTCLK) ? &pd_ext : &pd_sys; + char s[10]; + + sprintf(s, "clken%02x", j); + hws[j] = clk_hw_register_gate_parent_data(dev, s, pd, 0, + clk_regs + (j >> 4) * 4, + j & 0x0f, + CLK_GATE_HIWORD_MASK, + NULL); + if (IS_ERR(hws[j])) + return PTR_ERR(hws[j]); + dbg_clk(hws[j]); + } + + sp_clk_data->num = CLK_MAX; + return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, sp_clk_data); +} + +static const struct of_device_id sp7021_clk_dt_ids[] = { + { .compatible = "sunplus,sp7021-clkc", }, + { } +}; + +static struct platform_driver sp7021_clk_driver = { + .probe = sp7021_clk_probe, + .driver = { + .name = "sp7021-clk", + .of_match_table = sp7021_clk_dt_ids, + }, +}; +module_platform_driver(sp7021_clk_driver); + +MODULE_AUTHOR("Sunplus Technology"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Clock driver for Sunplus SP7021 SoC"); From patchwork Thu Mar 31 08:29:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qin Jian X-Patchwork-Id: 555370 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 95D41C433FE for ; Thu, 31 Mar 2022 08:36:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232053AbiCaIik (ORCPT ); Thu, 31 Mar 2022 04:38:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232864AbiCaIii (ORCPT ); Thu, 31 Mar 2022 04:38:38 -0400 Received: from mx1.cqplus1.com (unknown [113.204.237.245]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 050711F0441 for ; Thu, 31 Mar 2022 01:36:41 -0700 (PDT) X-MailGates: (flag:4,DYNAMIC,BADHELO,RELAY,NOHOST:PASS)(compute_score:DE LIVER,40,3) Received: from 172.28.114.216 by mx1.cqplus1.com with MailGates ESMTP Server V5.0(1188:0:AUTH_RELAY) (envelope-from ); Thu, 31 Mar 2022 16:29:00 +0800 (CST) From: Qin Jian To: krzysztof.kozlowski@canonical.com Cc: robh+dt@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, tglx@linutronix.de, maz@kernel.org, p.zabel@pengutronix.de, linux@armlinux.org.uk, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Qin Jian Subject: [PATCH v12 6/9] dt-bindings: interrupt-controller: Add bindings for SP7021 interrupt controller Date: Thu, 31 Mar 2022 16:29:53 +0800 Message-Id: X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add documentation to describe Sunplus SP7021 interrupt controller bindings. Signed-off-by: Qin Jian --- Move 'reg' after 'compatible' --- .../sunplus,sp7021-intc.yaml | 62 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 63 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sunplus,sp7021-intc.yaml diff --git a/Documentation/devicetree/bindings/interrupt-controller/sunplus,sp7021-intc.yaml b/Documentation/devicetree/bindings/interrupt-controller/sunplus,sp7021-intc.yaml new file mode 100644 index 000000000..f26d8b213 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/sunplus,sp7021-intc.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) Sunplus Co., Ltd. 2021 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/interrupt-controller/sunplus,sp7021-intc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Sunplus SP7021 SoC Interrupt Controller Device Tree Bindings + +maintainers: + - Qin Jian + +properties: + compatible: + items: + - const: sunplus,sp7021-intc + + reg: + maxItems: 2 + description: + Specifies base physical address(s) and size of the controller regs. + The 1st region include type/polarity/priority/mask regs. + The 2nd region include clear/masked_ext0/masked_ext1/group regs. + + interrupt-controller: true + + "#interrupt-cells": + const: 2 + description: + The first cell is the IRQ number, the second cell is the trigger + type as defined in interrupt.txt in this directory. + + interrupts: + maxItems: 2 + description: + EXT_INT0 & EXT_INT1, 2 interrupts references to primary interrupt + controller. + +required: + - compatible + - reg + - interrupt-controller + - "#interrupt-cells" + - interrupts + +additionalProperties: false + +examples: + - | + #include + + intc: interrupt-controller@9c000780 { + compatible = "sunplus,sp7021-intc"; + reg = <0x9c000780 0x80>, <0x9c000a80 0x80>; + interrupt-controller; + #interrupt-cells = <2>; + interrupt-parent = <&gic>; + interrupts = , /* EXT_INT0 */ + ; /* EXT_INT1 */ + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 8b77f7ae4..9fba67159 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2745,6 +2745,7 @@ S: Maintained W: https://sunplus-tibbo.atlassian.net/wiki/spaces/doc/overview F: Documentation/devicetree/bindings/arm/sunplus,sp7021.yaml F: Documentation/devicetree/bindings/clock/sunplus,sp7021-clkc.yaml +F: Documentation/devicetree/bindings/interrupt-controller/sunplus,sp7021-intc.yaml F: Documentation/devicetree/bindings/reset/sunplus,reset.yaml F: drivers/clk/clk-sp7021.c F: drivers/reset/reset-sunplus.c From patchwork Thu Mar 31 08:29:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qin Jian X-Patchwork-Id: 555367 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B7F6C433EF for ; Thu, 31 Mar 2022 08:37:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232965AbiCaIiz (ORCPT ); Thu, 31 Mar 2022 04:38:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232973AbiCaIiw (ORCPT ); Thu, 31 Mar 2022 04:38:52 -0400 Received: from mx1.cqplus1.com (unknown [113.204.237.245]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id BD3051EFE0E for ; Thu, 31 Mar 2022 01:36:39 -0700 (PDT) X-MailGates: (flag:4,DYNAMIC,BADHELO,RELAY,NOHOST:PASS)(compute_score:DE LIVER,40,3) Received: from 172.28.114.216 by mx1.cqplus1.com with MailGates ESMTP Server V5.0(1188:0:AUTH_RELAY) (envelope-from ); Thu, 31 Mar 2022 16:29:01 +0800 (CST) From: Qin Jian To: krzysztof.kozlowski@canonical.com Cc: robh+dt@kernel.org, mturquette@baylibre.com, sboyd@kernel.org, tglx@linutronix.de, maz@kernel.org, p.zabel@pengutronix.de, linux@armlinux.org.uk, arnd@arndb.de, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Qin Jian Subject: [PATCH v12 7/9] irqchip: Add Sunplus SP7021 interrupt controller driver Date: Thu, 31 Mar 2022 16:29:54 +0800 Message-Id: X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add interrupt controller driver for Sunplus SP7021 SoC. This is the interrupt controller in P-chip which collects all interrupt sources in P-chip and routes them to parent interrupt controller in C-chip. Signed-off-by: Qin Jian --- MAINTAINERS | 1 + drivers/irqchip/Kconfig | 9 + drivers/irqchip/Makefile | 2 + drivers/irqchip/irq-sp7021-intc.c | 288 ++++++++++++++++++++++++++++++ 4 files changed, 300 insertions(+) create mode 100644 drivers/irqchip/irq-sp7021-intc.c diff --git a/MAINTAINERS b/MAINTAINERS index 9fba67159..cf6873295 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2748,6 +2748,7 @@ F: Documentation/devicetree/bindings/clock/sunplus,sp7021-clkc.yaml F: Documentation/devicetree/bindings/interrupt-controller/sunplus,sp7021-intc.yaml F: Documentation/devicetree/bindings/reset/sunplus,reset.yaml F: drivers/clk/clk-sp7021.c +F: drivers/irqchip/irq-sp7021-intc.c F: drivers/reset/reset-sunplus.c F: include/dt-bindings/clock/sp-sp7021.h F: include/dt-bindings/reset/sp-sp7021.h diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 7038957f4..f5c2596bc 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -617,4 +617,13 @@ config MCHP_EIC help Support for Microchip External Interrupt Controller. +config SUNPLUS_SP7021_INTC + bool "Sunplus SP7021 interrupt controller" if COMPILE_TEST + default SOC_SP7021 + help + Support for the Sunplus SP7021 Interrupt Controller IP core. + SP7021 SoC has 2 Chips: C-Chip & P-Chip. This is used as a + chained controller, routing all interrupt source in P-Chip to + the primary controller on C-Chip. + endmenu diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index c1f611cbf..eb0ac83ff 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -117,3 +117,5 @@ obj-$(CONFIG_WPCM450_AIC) += irq-wpcm450-aic.o obj-$(CONFIG_IRQ_IDT3243X) += irq-idt3243x.o obj-$(CONFIG_APPLE_AIC) += irq-apple-aic.o obj-$(CONFIG_MCHP_EIC) += irq-mchp-eic.o +obj-$(CONFIG_SUNPLUS_SP7021_INTC) += irq-sp7021-intc.o + diff --git a/drivers/irqchip/irq-sp7021-intc.c b/drivers/irqchip/irq-sp7021-intc.c new file mode 100644 index 000000000..d1821a955 --- /dev/null +++ b/drivers/irqchip/irq-sp7021-intc.c @@ -0,0 +1,288 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +/* + * Copyright (C) Sunplus Technology Co., Ltd. + * All rights reserved. + */ +#include +#include +#include +#include +#include +#include +#include + +#define SP_INTC_HWIRQ_MIN 0 +#define SP_INTC_HWIRQ_MAX 223 + +#define SP_INTC_NR_IRQS (SP_INTC_HWIRQ_MAX - SP_INTC_HWIRQ_MIN + 1) +#define SP_INTC_NR_GROUPS DIV_ROUND_UP(SP_INTC_NR_IRQS, 32) +#define SP_INTC_REG_SIZE (SP_INTC_NR_GROUPS * 4) + +/* REG_GROUP_0 regs */ +#define REG_INTR_TYPE (sp_intc.g0) +#define REG_INTR_POLARITY (REG_INTR_TYPE + SP_INTC_REG_SIZE) +#define REG_INTR_PRIORITY (REG_INTR_POLARITY + SP_INTC_REG_SIZE) +#define REG_INTR_MASK (REG_INTR_PRIORITY + SP_INTC_REG_SIZE) + +/* REG_GROUP_1 regs */ +#define REG_INTR_CLEAR (sp_intc.g1) +#define REG_MASKED_EXT1 (REG_INTR_CLEAR + SP_INTC_REG_SIZE) +#define REG_MASKED_EXT0 (REG_MASKED_EXT1 + SP_INTC_REG_SIZE) +#define REG_INTR_GROUP (REG_INTR_CLEAR + 31 * 4) + +#define GROUP_MASK (BIT(SP_INTC_NR_GROUPS) - 1) +#define GROUP_SHIFT_EXT1 (0) +#define GROUP_SHIFT_EXT0 (8) + +/* + * When GPIO_INT0~7 set to edge trigger, doesn't work properly. + * WORKAROUND: change it to level trigger, and toggle the polarity + * at ACK/Handler to make the HW work. + */ +#define GPIO_INT0_HWIRQ 120 +#define GPIO_INT7_HWIRQ 127 +#define IS_GPIO_INT(irq) \ +({ \ + u32 i = irq; \ + (i >= GPIO_INT0_HWIRQ) && (i <= GPIO_INT7_HWIRQ); \ +}) + +/* index of states */ +enum { + _IS_EDGE = 0, + _IS_LOW, + _IS_ACTIVE +}; + +#define STATE_BIT(irq, idx) (((irq) - GPIO_INT0_HWIRQ) * 3 + (idx)) +#define ASSIGN_STATE(irq, idx, v) assign_bit(STATE_BIT(irq, idx), sp_intc.states, v) +#define TEST_STATE(irq, idx) test_bit(STATE_BIT(irq, idx), sp_intc.states) + +static struct sp_intctl { + /* + * REG_GROUP_0: include type/polarity/priority/mask regs. + * REG_GROUP_1: include clear/masked_ext0/masked_ext1/group regs. + */ + void __iomem *g0; // REG_GROUP_0 base + void __iomem *g1; // REG_GROUP_1 base + + struct irq_domain *domain; + raw_spinlock_t lock; + + /* + * store GPIO_INT states + * each interrupt has 3 states: is_edge, is_low, is_active + */ + DECLARE_BITMAP(states, (GPIO_INT7_HWIRQ - GPIO_INT0_HWIRQ + 1) * 3); +} sp_intc; + +static struct irq_chip sp_intc_chip; + +static void sp_intc_assign_bit(u32 hwirq, void __iomem *base, bool value) +{ + u32 offset, mask; + unsigned long flags; + void __iomem *reg; + + offset = (hwirq / 32) * 4; + reg = base + offset; + + raw_spin_lock_irqsave(&sp_intc.lock, flags); + mask = readl_relaxed(reg); + if (value) + mask |= BIT(hwirq % 32); + else + mask &= ~BIT(hwirq % 32); + writel_relaxed(mask, reg); + raw_spin_unlock_irqrestore(&sp_intc.lock, flags); +} + +static void sp_intc_ack_irq(struct irq_data *d) +{ + u32 hwirq = d->hwirq; + + if (unlikely(IS_GPIO_INT(hwirq) && TEST_STATE(hwirq, _IS_EDGE))) { // WORKAROUND + sp_intc_assign_bit(hwirq, REG_INTR_POLARITY, !TEST_STATE(hwirq, _IS_LOW)); + ASSIGN_STATE(hwirq, _IS_ACTIVE, true); + } + + sp_intc_assign_bit(hwirq, REG_INTR_CLEAR, 1); +} + +static void sp_intc_mask_irq(struct irq_data *d) +{ + sp_intc_assign_bit(d->hwirq, REG_INTR_MASK, 0); +} + +static void sp_intc_unmask_irq(struct irq_data *d) +{ + sp_intc_assign_bit(d->hwirq, REG_INTR_MASK, 1); +} + +static int sp_intc_set_type(struct irq_data *d, unsigned int type) +{ + u32 hwirq = d->hwirq; + bool is_edge = !(type & IRQ_TYPE_LEVEL_MASK); + bool is_low = (type == IRQ_TYPE_LEVEL_LOW || type == IRQ_TYPE_EDGE_FALLING); + + irq_set_handler_locked(d, is_edge ? handle_edge_irq : handle_level_irq); + + if (unlikely(IS_GPIO_INT(hwirq) && is_edge)) { // WORKAROUND + /* store states */ + ASSIGN_STATE(hwirq, _IS_EDGE, is_edge); + ASSIGN_STATE(hwirq, _IS_LOW, is_low); + ASSIGN_STATE(hwirq, _IS_ACTIVE, false); + /* change to level */ + is_edge = false; + } + + sp_intc_assign_bit(hwirq, REG_INTR_TYPE, is_edge); + sp_intc_assign_bit(hwirq, REG_INTR_POLARITY, is_low); + + return 0; +} + +static int sp_intc_get_ext_irq(int ext_num) +{ + void __iomem *base = ext_num ? REG_MASKED_EXT1 : REG_MASKED_EXT0; + u32 shift = ext_num ? GROUP_SHIFT_EXT1 : GROUP_SHIFT_EXT0; + u32 groups; + u32 pending_group; + u32 group; + u32 pending_irq; + + groups = readl_relaxed(REG_INTR_GROUP); + pending_group = (groups >> shift) & GROUP_MASK; + if (!pending_group) + return -1; + + group = fls(pending_group) - 1; + pending_irq = readl_relaxed(base + group * 4); + if (!pending_irq) + return -1; + + return (group * 32) + fls(pending_irq) - 1; +} + +static void sp_intc_handle_ext_cascaded(struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + int ext_num = (int)irq_desc_get_handler_data(desc); + int hwirq; + + chained_irq_enter(chip, desc); + + while ((hwirq = sp_intc_get_ext_irq(ext_num)) >= 0) { + if (unlikely(IS_GPIO_INT(hwirq) && TEST_STATE(hwirq, _IS_ACTIVE))) { // WORKAROUND + ASSIGN_STATE(hwirq, _IS_ACTIVE, false); + sp_intc_assign_bit(hwirq, REG_INTR_POLARITY, TEST_STATE(hwirq, _IS_LOW)); + } else { + generic_handle_domain_irq(sp_intc.domain, hwirq); + } + } + + chained_irq_exit(chip, desc); +} + +#ifdef CONFIG_SMP +static int sp_intc_set_affinity(struct irq_data *d, const struct cpumask *mask, bool force) +{ + return -EINVAL; +} +#endif + +static struct irq_chip sp_intc_chip = { + .name = "sp_intc", + .irq_ack = sp_intc_ack_irq, + .irq_mask = sp_intc_mask_irq, + .irq_unmask = sp_intc_unmask_irq, + .irq_set_type = sp_intc_set_type, +#ifdef CONFIG_SMP + .irq_set_affinity = sp_intc_set_affinity, +#endif +}; + +static int sp_intc_irq_domain_map(struct irq_domain *domain, + unsigned int irq, irq_hw_number_t hwirq) +{ + irq_set_chip_and_handler(irq, &sp_intc_chip, handle_level_irq); + irq_set_chip_data(irq, &sp_intc_chip); + irq_set_noprobe(irq); + + return 0; +} + +static const struct irq_domain_ops sp_intc_dm_ops = { + .xlate = irq_domain_xlate_twocell, + .map = sp_intc_irq_domain_map, +}; + +static int sp_intc_irq_map(struct device_node *node, int i) +{ + unsigned int irq; + + irq = irq_of_parse_and_map(node, i); + if (!irq) + return -ENOENT; + + irq_set_chained_handler_and_data(irq, sp_intc_handle_ext_cascaded, (void *)i); + + return 0; +} + +static int __init sp_intc_init_dt(struct device_node *node, struct device_node *parent) +{ + int i, ret; + + sp_intc.g0 = of_iomap(node, 0); + if (!sp_intc.g0) + return -ENXIO; + + sp_intc.g1 = of_iomap(node, 1); + if (!sp_intc.g1) { + ret = -ENXIO; + goto out_unmap0; + } + + ret = sp_intc_irq_map(node, 0); // EXT_INT0 + if (ret) + goto out_unmap1; + + ret = sp_intc_irq_map(node, 1); // EXT_INT1 + if (ret) + goto out_unmap1; + + /* initial regs */ + for (i = 0; i < SP_INTC_NR_GROUPS; i++) { + /* all mask */ + writel_relaxed(0, REG_INTR_MASK + i * 4); + /* all edge */ + writel_relaxed(~0, REG_INTR_TYPE + i * 4); + /* all high-active */ + writel_relaxed(0, REG_INTR_POLARITY + i * 4); + /* all EXT_INT0 */ + writel_relaxed(~0, REG_INTR_PRIORITY + i * 4); + /* all clear */ + writel_relaxed(~0, REG_INTR_CLEAR + i * 4); + } + + sp_intc.domain = irq_domain_add_linear(node, SP_INTC_NR_IRQS, + &sp_intc_dm_ops, &sp_intc); + if (!sp_intc.domain) { + ret = -ENOMEM; + goto out_unmap1; + } + + raw_spin_lock_init(&sp_intc.lock); + + return 0; + +out_unmap1: + iounmap(sp_intc.g1); +out_unmap0: + iounmap(sp_intc.g0); + + return ret; +} + +IRQCHIP_DECLARE(sp_intc, "sunplus,sp7021-intc", sp_intc_init_dt);