From patchwork Sat Jun 8 14:16:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 802718 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A550817B436; Sat, 8 Jun 2024 14:16:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717856219; cv=none; b=ZoWj0LTahthBYhYnkbJegeV3mNN/PnZ4XwFZdAKePHeAdYJX+WKOaaKB7fIaUP5seXpPwDXA0Us4Gc25t6ieJu2WRO5HxYjjkS6rpG19VFAF89tOnzHSxVatUIwIkJx9SmU+46B4xMvOmZKwaTtpo2cNF6iudUMZXHZ2andtcDE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717856219; c=relaxed/simple; bh=7Q5zzoTtYaxHoJAaqrsLXVlMnUd3Bim0Xl1gFFo659E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AMTTK15wiDjuf2t1W9/hSOrihgsEsxuGaNzl1+DgYdUgEVnG+s50ftxdaMc0QkdL8nKTjBNAA4kp5ebfPcsVQo+b7iKjPQcSBGSt4ZM3Iuq4mElwNrltz7jwiWteeAFQzdUJqi0HfGzMpsnnyebfs0H5SkRoz0ViH5IgTgqjNjg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=CAvHL0A7; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="CAvHL0A7" Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 5DC1B6F48; Sat, 8 Jun 2024 16:16:44 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1717856204; bh=7Q5zzoTtYaxHoJAaqrsLXVlMnUd3Bim0Xl1gFFo659E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CAvHL0A7Mw21/es/q5EWj9SgnY7Cusebnam4LwnMgYLgeUdwJIStuLs8XDXUYjDlZ PTDBN8pkNRJzEkypUAbY1RLvcdjHce6ogg+KyuP7LROoER9LbKLj1rQUQkMwP0r4nK 8N2OdLAKcRuD3feD763WG6b6nN8R3QdN6+Bnbu4I= From: Laurent Pinchart To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, linux-pwm@vger.kernel.org Cc: Bartosz Golaszewski , Conor Dooley , Krzysztof Kozlowski , Lee Jones , Linus Walleij , Rob Herring , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Haibo Chen Subject: [PATCH v4 2/4] mfd: adp5585: Add Analog Devices ADP5585 core support Date: Sat, 8 Jun 2024 17:16:31 +0300 Message-ID: <20240608141633.2562-3-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.44.2 In-Reply-To: <20240608141633.2562-1-laurent.pinchart@ideasonboard.com> References: <20240608141633.2562-1-laurent.pinchart@ideasonboard.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Haibo Chen The ADP5585 is a 10/11 input/output port expander with a built in keypad matrix decoder, programmable logic, reset generator, and PWM generator. This driver supports the chip by modelling it as an MFD device, with two child devices for the GPIO and PWM functions. The driver is derived from an initial implementation from NXP, available in commit 8059835bee19 ("MLK-25917-1 mfd: adp5585: add ADI adp5585 core support") in their BSP kernel tree. It has been extensively rewritten. Signed-off-by: Haibo Chen Signed-off-by: Laurent Pinchart --- Changes since v2: - Add missing and remove extraneous headers - Use i2c_get_match_data() - Drop unneeded parentheses - Use GENMASK() - Drop of_match_ptr() - Allow compilation on !OF with COMPILE_TEST - Replace ADP5585_MAN_ID() macro with ADP5585_MAN_ID_MASK - Drop unneeded macro Changes since v1: - Add comment to explain BANK and BIT macros - Drop compatible strings from cells - White space fixes - Fix comparison to NULL Changes compared to the NXP original version: - Add MAINTAINERS entry - Fix compatible strings for child devices - Fix header guards - Use lowercase hex constants - White space fixes - Use module_i2c_driver() - Switch to regmap - Drop I2C device ID table - Drop ADP5585_REG_MASK - Support R5 GPIO pin - Drop dev field from adp5585_dev structure - Check device ID at probe time - Fix register field names - Update copyright - Update license to GPL-2.0-only - Implement suspend/resume --- MAINTAINERS | 2 + drivers/mfd/Kconfig | 12 +++ drivers/mfd/Makefile | 1 + drivers/mfd/adp5585.c | 199 ++++++++++++++++++++++++++++++++++++ include/linux/mfd/adp5585.h | 126 +++++++++++++++++++++++ 5 files changed, 340 insertions(+) create mode 100644 drivers/mfd/adp5585.c create mode 100644 include/linux/mfd/adp5585.h diff --git a/MAINTAINERS b/MAINTAINERS index 8ebdde3106d3..1250992f7788 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -532,6 +532,8 @@ L: linux-gpio@vger.kernel.org L: linux-pwm@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/*/adi,adp5585*.yaml +F: drivers/mfd/adp5585.c +F: include/linux/mfd/adp5585.h ADP5588 QWERTY KEYPAD AND IO EXPANDER DRIVER (ADP5588/ADP5587) M: Michael Hennerich diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 266b4f54af60..05e8e1f0b602 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -20,6 +20,18 @@ config MFD_CS5535 This is the core driver for CS5535/CS5536 MFD functions. This is necessary for using the board's GPIO and MFGPT functionality. +config MFD_ADP5585 + tristate "Analog Devices ADP5585 MFD driver" + select MFD_CORE + select REGMAP_I2C + depends on I2C + depends on OF || COMPILE_TEST + help + Say yes here to add support for the Analog Devices ADP5585 GPIO + expander, PWM and keypad controller. This includes the I2C driver and + the core APIs _only_, you have to select individual components like + the GPIO and PWM functions under the corresponding menus. + config MFD_ALTERA_A10SR bool "Altera Arria10 DevKit System Resource chip" depends on ARCH_INTEL_SOCFPGA && SPI_MASTER=y && OF diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index c66f07edcd0e..37f36a019a68 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -188,6 +188,7 @@ obj-$(CONFIG_MFD_DB8500_PRCMU) += db8500-prcmu.o obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-sysctrl.o obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o obj-$(CONFIG_PMIC_ADP5520) += adp5520.o +obj-$(CONFIG_MFD_ADP5585) += adp5585.o obj-$(CONFIG_MFD_KEMPLD) += kempld-core.o obj-$(CONFIG_MFD_INTEL_QUARK_I2C_GPIO) += intel_quark_i2c_gpio.o obj-$(CONFIG_LPC_SCH) += lpc_sch.o diff --git a/drivers/mfd/adp5585.c b/drivers/mfd/adp5585.c new file mode 100644 index 000000000000..5268229eed18 --- /dev/null +++ b/drivers/mfd/adp5585.c @@ -0,0 +1,199 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Analog Devices ADP5585 I/O expander, PWM controller and keypad controller + * + * Copyright 2022 NXP + * Copyright 2024 Ideas on Board Oy + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static const struct mfd_cell adp5585_devs[] = { + { .name = "adp5585-gpio", }, + { .name = "adp5585-pwm", }, +}; + +static const struct regmap_range adp5585_volatile_ranges[] = { + regmap_reg_range(ADP5585_ID, ADP5585_GPI_STATUS_B), +}; + +static const struct regmap_access_table adp5585_volatile_regs = { + .yes_ranges = adp5585_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(adp5585_volatile_ranges), +}; + +static const u8 adp5585_regmap_defaults_00[ADP5585_MAX_REG + 1] = { + /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x18 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, +}; + +static const u8 adp5585_regmap_defaults_02[ADP5585_MAX_REG + 1] = { + /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3, + /* 0x18 */ 0x03, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, +}; + +static const u8 adp5585_regmap_defaults_04[ADP5585_MAX_REG + 1] = { + /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, + /* 0x18 */ 0x05, 0x55, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, +}; + +enum adp5585_regmap_type { + ADP5585_REGMAP_00, + ADP5585_REGMAP_02, + ADP5585_REGMAP_04, +}; + +static const struct regmap_config adp5585_regmap_configs[] = { + [ADP5585_REGMAP_00] = { + .reg_bits = 8, + .val_bits = 8, + .max_register = ADP5585_MAX_REG, + .volatile_table = &adp5585_volatile_regs, + .cache_type = REGCACHE_MAPLE, + .reg_defaults_raw = adp5585_regmap_defaults_00, + .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_00), + }, + [ADP5585_REGMAP_02] = { + .reg_bits = 8, + .val_bits = 8, + .max_register = ADP5585_MAX_REG, + .volatile_table = &adp5585_volatile_regs, + .cache_type = REGCACHE_MAPLE, + .reg_defaults_raw = adp5585_regmap_defaults_02, + .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_02), + }, + [ADP5585_REGMAP_04] = { + .reg_bits = 8, + .val_bits = 8, + .max_register = ADP5585_MAX_REG, + .volatile_table = &adp5585_volatile_regs, + .cache_type = REGCACHE_MAPLE, + .reg_defaults_raw = adp5585_regmap_defaults_04, + .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_04), + }, +}; + +static int adp5585_i2c_probe(struct i2c_client *i2c) +{ + const struct regmap_config *regmap_config; + struct adp5585_dev *adp5585; + unsigned int id; + int ret; + + adp5585 = devm_kzalloc(&i2c->dev, sizeof(struct adp5585_dev), + GFP_KERNEL); + if (!adp5585) + return -ENOMEM; + + i2c_set_clientdata(i2c, adp5585); + + regmap_config = i2c_get_match_data(i2c); + adp5585->regmap = devm_regmap_init_i2c(i2c, regmap_config); + if (IS_ERR(adp5585->regmap)) + return dev_err_probe(&i2c->dev, PTR_ERR(adp5585->regmap), + "Failed to initialize register map\n"); + + /* Verify the device ID. */ + ret = regmap_read(adp5585->regmap, ADP5585_ID, &id); + if (ret) + return dev_err_probe(&i2c->dev, ret, + "Failed to read device ID\n"); + + if ((id & ADP5585_MAN_ID_MASK) != ADP5585_MAN_ID_VALUE) + return dev_err_probe(&i2c->dev, -ENODEV, + "Invalid device ID 0x%02x\n", id); + + dev_dbg(&i2c->dev, "device ID 0x%02x\n", id); + + /* Add MFD devices. */ + ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, + adp5585_devs, ARRAY_SIZE(adp5585_devs), + NULL, 0, NULL); + if (ret) + return dev_err_probe(&i2c->dev, ret, + "Failed to add MFD devices\n"); + + return 0; +} + +static int adp5585_suspend(struct device *dev) +{ + struct adp5585_dev *adp5585 = dev_get_drvdata(dev); + + regcache_cache_only(adp5585->regmap, true); + + return 0; +} + +static int adp5585_resume(struct device *dev) +{ + struct adp5585_dev *adp5585 = dev_get_drvdata(dev); + + regcache_cache_only(adp5585->regmap, false); + regcache_mark_dirty(adp5585->regmap); + + return regcache_sync(adp5585->regmap); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(adp5585_pm, adp5585_suspend, adp5585_resume); + +static const struct of_device_id adp5585_of_match[] = { + { + .compatible = "adi,adp5585-00", + .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], + }, { + .compatible = "adi,adp5585-01", + .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], + }, { + .compatible = "adi,adp5585-02", + .data = &adp5585_regmap_configs[ADP5585_REGMAP_02], + }, { + .compatible = "adi,adp5585-03", + .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], + }, { + .compatible = "adi,adp5585-04", + .data = &adp5585_regmap_configs[ADP5585_REGMAP_04], + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, adp5585_of_match); + +static struct i2c_driver adp5585_i2c_driver = { + .driver = { + .name = "adp5585", + .of_match_table = adp5585_of_match, + .pm = pm_sleep_ptr(&adp5585_pm), + }, + .probe = adp5585_i2c_probe, +}; +module_i2c_driver(adp5585_i2c_driver); + +MODULE_DESCRIPTION("ADP5585 core driver"); +MODULE_AUTHOR("Haibo Chen "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/adp5585.h b/include/linux/mfd/adp5585.h new file mode 100644 index 000000000000..92d90218762e --- /dev/null +++ b/include/linux/mfd/adp5585.h @@ -0,0 +1,126 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Analog Devices ADP5585 I/O expander, PWM controller and keypad controller + * + * Copyright 2022 NXP + * Copyright 2024 Ideas on Board Oy + */ + +#ifndef __LINUX_MFD_ADP5585_H_ +#define __LINUX_MFD_ADP5585_H_ + +#include + +#define ADP5585_ID 0x00 +#define ADP5585_MAN_ID_VALUE 0x20 +#define ADP5585_MAN_ID_MASK GENMASK(7, 4) +#define ADP5585_INT_STATUS 0x01 +#define ADP5585_STATUS 0x02 +#define ADP5585_FIFO_1 0x03 +#define ADP5585_FIFO_2 0x04 +#define ADP5585_FIFO_3 0x05 +#define ADP5585_FIFO_4 0x06 +#define ADP5585_FIFO_5 0x07 +#define ADP5585_FIFO_6 0x08 +#define ADP5585_FIFO_7 0x09 +#define ADP5585_FIFO_8 0x0a +#define ADP5585_FIFO_9 0x0b +#define ADP5585_FIFO_10 0x0c +#define ADP5585_FIFO_11 0x0d +#define ADP5585_FIFO_12 0x0e +#define ADP5585_FIFO_13 0x0f +#define ADP5585_FIFO_14 0x10 +#define ADP5585_FIFO_15 0x11 +#define ADP5585_FIFO_16 0x12 +#define ADP5585_GPI_INT_STAT_A 0x13 +#define ADP5585_GPI_INT_STAT_B 0x14 +#define ADP5585_GPI_STATUS_A 0x15 +#define ADP5585_GPI_STATUS_B 0x16 +#define ADP5585_RPULL_CONFIG_A 0x17 +#define ADP5585_RPULL_CONFIG_B 0x18 +#define ADP5585_RPULL_CONFIG_C 0x19 +#define ADP5585_RPULL_CONFIG_D 0x1a +#define ADP5585_Rx_PULL_CFG_PU_300K 0 +#define ADP5585_Rx_PULL_CFG_PD_300K 1 +#define ADP5585_Rx_PULL_CFG_PU_100K 2 +#define ADP5585_Rx_PULL_CFG_DISABLE 3 +#define ADP5585_Rx_PULL_CFG_MASK 3 +#define ADP5585_GPI_INT_LEVEL_A 0x1b +#define ADP5585_GPI_INT_LEVEL_B 0x1c +#define ADP5585_GPI_EVENT_EN_A 0x1d +#define ADP5585_GPI_EVENT_EN_B 0x1e +#define ADP5585_GPI_INTERRUPT_EN_A 0x1f +#define ADP5585_GPI_INTERRUPT_EN_B 0x20 +#define ADP5585_DEBOUNCE_DIS_A 0x21 +#define ADP5585_DEBOUNCE_DIS_B 0x22 +#define ADP5585_GPO_DATA_OUT_A 0x23 +#define ADP5585_GPO_DATA_OUT_B 0x24 +#define ADP5585_GPO_OUT_MODE_A 0x25 +#define ADP5585_GPO_OUT_MODE_B 0x26 +#define ADP5585_GPIO_DIRECTION_A 0x27 +#define ADP5585_GPIO_DIRECTION_B 0x28 +#define ADP5585_RESET1_EVENT_A 0x29 +#define ADP5585_RESET1_EVENT_B 0x2a +#define ADP5585_RESET1_EVENT_C 0x2b +#define ADP5585_RESET2_EVENT_A 0x2c +#define ADP5585_RESET2_EVENT_B 0x2d +#define ADP5585_RESET_CFG 0x2e +#define ADP5585_PWM_OFFT_LOW 0x2f +#define ADP5585_PWM_OFFT_HIGH 0x30 +#define ADP5585_PWM_ONT_LOW 0x31 +#define ADP5585_PWM_ONT_HIGH 0x32 +#define ADP5585_PWM_CFG 0x33 +#define ADP5585_PWM_IN_AND BIT(2) +#define ADP5585_PWM_MODE BIT(1) +#define ADP5585_PWM_EN BIT(0) +#define ADP5585_LOGIC_CFG 0x34 +#define ADP5585_LOGIC_FF_CFG 0x35 +#define ADP5585_LOGIC_INT_EVENT_EN 0x36 +#define ADP5585_POLL_PTIME_CFG 0x37 +#define ADP5585_PIN_CONFIG_A 0x38 +#define ADP5585_PIN_CONFIG_B 0x39 +#define ADP5585_PIN_CONFIG_C 0x3a +#define ADP5585_PULL_SELECT BIT(7) +#define ADP5585_C4_EXTEND_CFG_GPIO11 (0U << 6) +#define ADP5585_C4_EXTEND_CFG_RESET2 (1U << 6) +#define ADP5585_C4_EXTEND_CFG_MASK GENMASK(6, 6) +#define ADP5585_R4_EXTEND_CFG_GPIO5 (0U << 5) +#define ADP5585_R4_EXTEND_CFG_RESET1 (1U << 5) +#define ADP5585_R4_EXTEND_CFG_MASK GENMASK(5, 5) +#define ADP5585_R3_EXTEND_CFG_GPIO4 (0U << 2) +#define ADP5585_R3_EXTEND_CFG_LC (1U << 2) +#define ADP5585_R3_EXTEND_CFG_PWM_OUT (2U << 2) +#define ADP5585_R3_EXTEND_CFG_MASK GENMASK(3, 2) +#define ADP5585_R0_EXTEND_CFG_GPIO1 (0U << 0) +#define ADP5585_R0_EXTEND_CFG_LY (1U << 0) +#define ADP5585_R0_EXTEND_CFG_MASK GENMASK(0, 0) +#define ADP5585_GENERAL_CFG 0x3b +#define ADP5585_OSC_EN BIT(7) +#define ADP5585_OSC_FREQ_50KHZ (0U << 5) +#define ADP5585_OSC_FREQ_100KHZ (1U << 5) +#define ADP5585_OSC_FREQ_200KHZ (2U << 5) +#define ADP5585_OSC_FREQ_500KHZ (3U << 5) +#define ADP5585_OSC_FREQ_MASK (3U << 5) +#define ADP5585_INT_CFG BIT(1) +#define ADP5585_RST_CFG BIT(0) +#define ADP5585_INT_EN 0x3c + +#define ADP5585_MAX_REG ADP5585_INT_EN + +/* + * Bank 0 covers pins "GPIO 1/R0" to "GPIO 6/R5", numbered 0 to 5 by the + * driver, and bank 1 covers pins "GPIO 7/C0" to "GPIO 11/C4", numbered 6 to + * 10. Some variants of the ADP5585 don't support "GPIO 6/R5". As the driver + * uses identical GPIO numbering for all variants to avoid confusion, GPIO 5 is + * marked as reserved in the device tree for variants that don't support it. + */ +#define ADP5585_BANK(n) ((n) >= 6 ? 1 : 0) +#define ADP5585_BIT(n) ((n) >= 6 ? BIT((n) - 6) : BIT(n)) + +struct regmap; + +struct adp5585_dev { + struct regmap *regmap; +}; + +#endif From patchwork Sat Jun 8 14:16:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 802717 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5BD7B17B50D; Sat, 8 Jun 2024 14:17:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717856223; cv=none; b=dT/t1X4jGnhK/lx6UNtejxJMqdLp17fWaFuJbtVvLM34IT1QU2Bh9Dt2wcJAZLWFZ7BPtBlxmnKpH2fRK8s1U/c3gdzFG2OCghRK6Hyf5k1WjLONyS3e9JDJ36XEfZlVe5YjWOjlYGpPS5s4SeLBUxOYUHKVC698a308JfIMQWA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717856223; c=relaxed/simple; bh=qYOdRkzQhyv2e+7pe3Dfv/jiPlhnomyMHo7rnxlbq7w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QPYs7O5mto/Y9dtxNiK3/virckdws8AFfvofRhYWYtJndla0i9/4fhuJ7NIXVaj5/nfb60oln1oIsVtoFq2/6KsrAPnsvXJtOCtLoi+hF1AQDZbH9rYh/AwN36YILppkE5erGUD6gB7vtHCIfu8vnl/n9gDVjL+x6M1xkQya+S8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=Pb8fNsuG; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="Pb8fNsuG" Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 0ECA9C67; Sat, 8 Jun 2024 16:16:47 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1717856207; bh=qYOdRkzQhyv2e+7pe3Dfv/jiPlhnomyMHo7rnxlbq7w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pb8fNsuGxXft0NHMJNoxsqjHcLLn3VK6BluVwm0zPA4r0LqQd03X7DtrFDC8RRz8j E/whO5ZtUgTSYItHpfki4skip8YeSQEhZhdGw+pXaIp7GSTMcHcWjmP7uy6TP+Oj4H S2sI9Ru5kt+jbKzXkXfe8ptgR8DD0PQxbZCzNDa0= From: Laurent Pinchart To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-gpio@vger.kernel.org, linux-pwm@vger.kernel.org Cc: Bartosz Golaszewski , Conor Dooley , Krzysztof Kozlowski , Lee Jones , Linus Walleij , Rob Herring , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Clark Wang Subject: [PATCH v4 4/4] pwm: adp5585: Add Analog Devices ADP5585 support Date: Sat, 8 Jun 2024 17:16:33 +0300 Message-ID: <20240608141633.2562-5-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.44.2 In-Reply-To: <20240608141633.2562-1-laurent.pinchart@ideasonboard.com> References: <20240608141633.2562-1-laurent.pinchart@ideasonboard.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Clark Wang The ADP5585 is a 10/11 input/output port expander with a built in keypad matrix decoder, programmable logic, reset generator, and PWM generator. This driver supports the PWM function using the platform device registered by the core MFD driver. The driver is derived from an initial implementation from NXP, available in commit 113113742208 ("MLK-25922-1 pwm: adp5585: add adp5585 PWM support") in their BSP kernel tree. It has been extensively rewritten. Signed-off-by: Clark Wang Signed-off-by: Laurent Pinchart --- Changes since v2: - Add missing headers - Sort headers Changes since v1: - Drop mutex - Restore R3 pinconfig to known value - Simplify error check in pwm_adp5585_request() - Don't fake PWM_POLARITY_INVERSED - Fix rounding of period and duty cycle - Drop OF match table - Drop empty .remove() handler - Allocate pwm_chip dynamically - Document limitations - Add platform ID table - Set struct device of_node manually - Merge child DT node into parent node Changes compared to the NXP original version - Add MAINTAINERS entry - Drop pwm_ops.owner - Fix compilation - Add prefix to compatible string - Switch to regmap - Use devm_pwmchip_add() - Cleanup header includes - White space fixes - Drop ADP5585_REG_MASK - Fix register field names - Use mutex scope guards - Clear OSC_EN when freeing PWM - Reorder functions - Clear PWM_IN_AND and PWM_MODE bits - Support inverted polarity - Clean up on/off computations - Fix duty cycle computation in .get_state() - Destroy mutex on remove - Update copyright - Update license to GPL-2.0-only --- MAINTAINERS | 1 + drivers/pwm/Kconfig | 7 ++ drivers/pwm/Makefile | 1 + drivers/pwm/pwm-adp5585.c | 189 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 198 insertions(+) create mode 100644 drivers/pwm/pwm-adp5585.c diff --git a/MAINTAINERS b/MAINTAINERS index 80f3544d07aa..b15bf6e2485c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -534,6 +534,7 @@ S: Maintained F: Documentation/devicetree/bindings/*/adi,adp5585*.yaml F: drivers/gpio/gpio-adp5585.c F: drivers/mfd/adp5585.c +F: drivers/pwm/pwm-adp5585.c F: include/linux/mfd/adp5585.h ADP5588 QWERTY KEYPAD AND IO EXPANDER DRIVER (ADP5588/ADP5587) diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig index 1dd7921194f5..b778ecee3e9b 100644 --- a/drivers/pwm/Kconfig +++ b/drivers/pwm/Kconfig @@ -47,6 +47,13 @@ config PWM_AB8500 To compile this driver as a module, choose M here: the module will be called pwm-ab8500. +config PWM_ADP5585 + tristate "ADP5585 PWM support" + depends on MFD_ADP5585 + help + This option enables support for the PWM function found in the Analog + Devices ADP5585. + config PWM_APPLE tristate "Apple SoC PWM support" depends on ARCH_APPLE || COMPILE_TEST diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile index 90913519f11a..f24d518d20f2 100644 --- a/drivers/pwm/Makefile +++ b/drivers/pwm/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_PWM) += core.o obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o +obj-$(CONFIG_PWM_ADP5585) += pwm-adp5585.o obj-$(CONFIG_PWM_APPLE) += pwm-apple.o obj-$(CONFIG_PWM_ATMEL) += pwm-atmel.o obj-$(CONFIG_PWM_ATMEL_HLCDC_PWM) += pwm-atmel-hlcdc.o diff --git a/drivers/pwm/pwm-adp5585.c b/drivers/pwm/pwm-adp5585.c new file mode 100644 index 000000000000..7f226c287efe --- /dev/null +++ b/drivers/pwm/pwm-adp5585.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Analog Devices ADP5585 PWM driver + * + * Copyright 2022 NXP + * Copyright 2024 Ideas on Board Oy + * + * Limitations: + * - The .apply() operation executes atomically, but may not wait for the + * period to complete (this is not documented and would need to be tested). + * - Disabling the PWM drives the output pin to a low level immediately. + * - The hardware can only generate normal polarity output. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ADP5585_PWM_CHAN_NUM 1 + +#define ADP5585_PWM_OSC_FREQ_HZ 1000000U +#define ADP5585_PWM_MIN_PERIOD_NS (2ULL * NSEC_PER_SEC / ADP5585_PWM_OSC_FREQ_HZ) +#define ADP5585_PWM_MAX_PERIOD_NS (2ULL * 0xffff * NSEC_PER_SEC / ADP5585_PWM_OSC_FREQ_HZ) + +static int pwm_adp5585_request(struct pwm_chip *chip, struct pwm_device *pwm) +{ + struct regmap *regmap = pwmchip_get_drvdata(chip); + int ret; + + ret = regmap_update_bits(regmap, ADP5585_PIN_CONFIG_C, + ADP5585_R3_EXTEND_CFG_MASK, + ADP5585_R3_EXTEND_CFG_PWM_OUT); + if (ret) + return ret; + + return regmap_update_bits(regmap, ADP5585_GENERAL_CFG, + ADP5585_OSC_EN, ADP5585_OSC_EN); +} + +static void pwm_adp5585_free(struct pwm_chip *chip, struct pwm_device *pwm) +{ + struct regmap *regmap = pwmchip_get_drvdata(chip); + + regmap_update_bits(regmap, ADP5585_PIN_CONFIG_C, + ADP5585_R3_EXTEND_CFG_MASK, + ADP5585_R3_EXTEND_CFG_GPIO4); + regmap_update_bits(regmap, ADP5585_GENERAL_CFG, + ADP5585_OSC_EN, 0); +} + +static int pwm_adp5585_apply(struct pwm_chip *chip, + struct pwm_device *pwm, + const struct pwm_state *state) +{ + struct regmap *regmap = pwmchip_get_drvdata(chip); + u64 period, duty_cycle; + u32 on, off; + int ret; + + if (!state->enabled) + return regmap_update_bits(regmap, ADP5585_PWM_CFG, + ADP5585_PWM_EN, 0); + + if (state->polarity != PWM_POLARITY_NORMAL) + return -EINVAL; + + if (state->period < ADP5585_PWM_MIN_PERIOD_NS) + return -EINVAL; + + period = min(state->period, ADP5585_PWM_MAX_PERIOD_NS); + duty_cycle = min(state->duty_cycle, period); + + /* + * Compute the on and off time. As the internal oscillator frequency is + * 1MHz, the calculation can be simplified without loss of precision. + */ + on = div_u64(duty_cycle, NSEC_PER_SEC / ADP5585_PWM_OSC_FREQ_HZ); + off = div_u64(period, NSEC_PER_SEC / ADP5585_PWM_OSC_FREQ_HZ) - on; + + ret = regmap_write(regmap, ADP5585_PWM_OFFT_LOW, + off & 0xff); + if (ret) + return ret; + ret = regmap_write(regmap, ADP5585_PWM_OFFT_HIGH, + (off >> 8) & 0xff); + if (ret) + return ret; + ret = regmap_write(regmap, ADP5585_PWM_ONT_LOW, + on & 0xff); + if (ret) + return ret; + ret = regmap_write(regmap, ADP5585_PWM_ONT_HIGH, + (on >> 8) & 0xff); + if (ret) + return ret; + + /* Enable PWM in continuous mode and no external AND'ing. */ + ret = regmap_update_bits(regmap, ADP5585_PWM_CFG, + ADP5585_PWM_IN_AND | ADP5585_PWM_MODE | + ADP5585_PWM_EN, ADP5585_PWM_EN); + if (ret) + return ret; + + return 0; +} + +static int pwm_adp5585_get_state(struct pwm_chip *chip, + struct pwm_device *pwm, + struct pwm_state *state) +{ + struct regmap *regmap = pwmchip_get_drvdata(chip); + unsigned int on, off; + unsigned int val; + + regmap_read(regmap, ADP5585_PWM_OFFT_LOW, &off); + regmap_read(regmap, ADP5585_PWM_OFFT_HIGH, &val); + off |= val << 8; + + regmap_read(regmap, ADP5585_PWM_ONT_LOW, &on); + regmap_read(regmap, ADP5585_PWM_ONT_HIGH, &val); + on |= val << 8; + + state->duty_cycle = on * (NSEC_PER_SEC / ADP5585_PWM_OSC_FREQ_HZ); + state->period = (on + off) * (NSEC_PER_SEC / ADP5585_PWM_OSC_FREQ_HZ); + + state->polarity = PWM_POLARITY_NORMAL; + + regmap_read(regmap, ADP5585_PWM_CFG, &val); + state->enabled = !!(val & ADP5585_PWM_EN); + + return 0; +} + +static const struct pwm_ops adp5585_pwm_ops = { + .request = pwm_adp5585_request, + .free = pwm_adp5585_free, + .apply = pwm_adp5585_apply, + .get_state = pwm_adp5585_get_state, +}; + +static int adp5585_pwm_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct adp5585_dev *adp5585 = dev_get_drvdata(dev->parent); + struct pwm_chip *chip; + int ret; + + chip = devm_pwmchip_alloc(dev, ADP5585_PWM_CHAN_NUM, 0); + if (IS_ERR(chip)) + return PTR_ERR(chip); + + device_set_of_node_from_dev(dev, dev->parent); + + pwmchip_set_drvdata(chip, adp5585->regmap); + chip->ops = &adp5585_pwm_ops; + + ret = devm_pwmchip_add(dev, chip); + if (ret) + return dev_err_probe(dev, ret, "failed to add PWM chip\n"); + + return 0; +} + +static const struct platform_device_id adp5585_pwm_id_table[] = { + { "adp5585-pwm" }, + { /* Sentinel */ }, +}; +MODULE_DEVICE_TABLE(platform, adp5585_pwm_id_table); + +static struct platform_driver adp5585_pwm_driver = { + .driver = { + .name = "adp5585-pwm", + }, + .probe = adp5585_pwm_probe, + .id_table = adp5585_pwm_id_table, +}; +module_platform_driver(adp5585_pwm_driver); + +MODULE_AUTHOR("Xiaoning Wang "); +MODULE_DESCRIPTION("ADP5585 PWM Driver"); +MODULE_LICENSE("GPL");