From patchwork Mon Jan 25 04:43:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qingfang Deng X-Patchwork-Id: 370357 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACC2AC433E0 for ; Mon, 25 Jan 2021 04:45:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6EFFF22CA2 for ; Mon, 25 Jan 2021 04:45:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727162AbhAYEou (ORCPT ); Sun, 24 Jan 2021 23:44:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727158AbhAYEof (ORCPT ); Sun, 24 Jan 2021 23:44:35 -0500 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5984C061756; Sun, 24 Jan 2021 20:43:54 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id g15so7842417pjd.2; Sun, 24 Jan 2021 20:43:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=v1/Q3zp3Vfmt/fjpAsCkjIhac3E9OrOmSYmVgqEy+nY=; b=DjTeAYy8+nMI8Nbot17ykSSuLqiNFKKXdoybG+PBjldm9uG1b4as6dK9WagdqVChb9 76GJ7GcDt1rR1lPPX8v3s8N/A5V1NsOtocyoJ3jX7Lx2DkyRUDKX1jDCRGcFf5NMzANn hbB7DfqHW0psss6uiBJKqQB1Lne/DbAGQNGtONLcmb9lhV1jETUX1Hx422Z6pq4Tj1ja yixIoFnivlWZKU7ulKffFWU8L0hUei1zJV1lwphT68LP9DtwC0c2NQxjsSWZk+wG3+Li X2AjfSePJNIrd4/7weiC3291tFkkbeONUqEsU43F3MGnw+kOVgVyujkCsPvviZ67undV Pw+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=v1/Q3zp3Vfmt/fjpAsCkjIhac3E9OrOmSYmVgqEy+nY=; b=O6f8bh9kBZKfzn8GI01/6b4pB/PCGtzR8KzNcNqstXgXw/JGZI65kXI70NltAkluB9 A0r/c61QJvqU5tB8l88b3eOgSQi0H8Sf35o3W5OZXnVGYKS5LqjZlY6BvfIO4CfOI2cV +bGhaNzu0R32fAwO8SFQhMxkw2toX0Zij0u3MSlpf04hc2IW/rQNsQucI9eUc3BX8UPY N98jl5Ut+gYK1SPiOEtuSuUKFfhkE+QmDC6LMJvIe9eLGCuiiCJtJkdKGrUr6ydPwXI2 z49r9Ni9DgsZfvvQDpUdWwgDRPPnSCQ0VqmxX7Tpqqn/GFAAFhFOWDRUzPv3MTf/qQbY Svjg== X-Gm-Message-State: AOAM533Dq1pLBGt8k852UogDrqBfNERX4EJot7VbudGVYiLiJAbEhejI cNV4mid34Tihgsx6cXlx4o0= X-Google-Smtp-Source: ABdhPJyb+2sRlqhupesds+M5P26CjfYD4TSxkgTlYi/Lto8weoiFIg6Er55myXt/U4ASyEXwLSXJ2w== X-Received: by 2002:a17:90b:2352:: with SMTP id ms18mr4380214pjb.138.1611549834379; Sun, 24 Jan 2021 20:43:54 -0800 (PST) Received: from container-ubuntu.lan ([171.211.26.203]) by smtp.gmail.com with ESMTPSA id h4sm11913369pfo.187.2021.01.24.20.43.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 24 Jan 2021 20:43:53 -0800 (PST) From: DENG Qingfang To: Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Jakub Kicinski , Rob Herring , Matthias Brugger , Sean Wang , Landen Chao , Philipp Zabel , Russell King , Linus Walleij , Bartosz Golaszewski , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Frank Wunderlich , =?utf-8?q?Ren=C3=A9_van_Do?= =?utf-8?q?rst?= Subject: [PATCH net-next v2 2/2] net: dsa: mt7530: MT7530 optional GPIO support Date: Mon, 25 Jan 2021 12:43:22 +0800 Message-Id: <20210125044322.6280-3-dqfext@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210125044322.6280-1-dqfext@gmail.com> References: <20210125044322.6280-1-dqfext@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org MT7530's LED controller can drive up to 15 LED/GPIOs. Add support for GPIO control and allow users to use its GPIOs by setting gpio-controller property in device tree. Signed-off-by: DENG Qingfang --- Changes v1 -> v2: Set Output Enable after changing direction to output to avoid signal glitch. Comment mt7530_gpio_to_bit function. drivers/net/dsa/mt7530.c | 110 +++++++++++++++++++++++++++++++++++++++ drivers/net/dsa/mt7530.h | 20 +++++++ 2 files changed, 130 insertions(+) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index d2196197d920..eb13ba79dd01 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include "mt7530.h" @@ -1622,6 +1623,109 @@ mtk_get_tag_protocol(struct dsa_switch *ds, int port, } } +static inline u32 +mt7530_gpio_to_bit(unsigned int offset) +{ + /* Map GPIO offset to register bit + * [ 2: 0] port 0 LED 0..2 as GPIO 0..2 + * [ 6: 4] port 1 LED 0..2 as GPIO 3..5 + * [10: 8] port 2 LED 0..2 as GPIO 6..8 + * [14:12] port 3 LED 0..2 as GPIO 9..11 + * [18:16] port 4 LED 0..2 as GPIO 12..14 + */ + return BIT(offset + offset / 3); +} + +static int +mt7530_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + return !!(mt7530_read(priv, MT7530_LED_GPIO_DATA) & bit); +} + +static void +mt7530_gpio_set(struct gpio_chip *gc, unsigned int offset, int value) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + if (value) + mt7530_set(priv, MT7530_LED_GPIO_DATA, bit); + else + mt7530_clear(priv, MT7530_LED_GPIO_DATA, bit); +} + +static int +mt7530_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + return (mt7530_read(priv, MT7530_LED_GPIO_DIR) & bit) ? + GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN; +} + +static int +mt7530_gpio_direction_input(struct gpio_chip *gc, unsigned int offset) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + mt7530_clear(priv, MT7530_LED_GPIO_OE, bit); + mt7530_clear(priv, MT7530_LED_GPIO_DIR, bit); + + return 0; +} + +static int +mt7530_gpio_direction_output(struct gpio_chip *gc, unsigned int offset, int value) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + mt7530_set(priv, MT7530_LED_GPIO_DIR, bit); + + if (value) + mt7530_set(priv, MT7530_LED_GPIO_DATA, bit); + else + mt7530_clear(priv, MT7530_LED_GPIO_DATA, bit); + + mt7530_set(priv, MT7530_LED_GPIO_OE, bit); + + return 0; +} + +static int +mt7530_setup_gpio(struct mt7530_priv *priv) +{ + struct device *dev = priv->dev; + struct gpio_chip *gc; + + gc = devm_kzalloc(dev, sizeof(*gc), GFP_KERNEL); + if (!gc) + return -ENOMEM; + + mt7530_write(priv, MT7530_LED_GPIO_OE, 0); + mt7530_write(priv, MT7530_LED_GPIO_DIR, 0); + mt7530_write(priv, MT7530_LED_IO_MODE, 0); + + gc->label = "mt7530"; + gc->parent = dev; + gc->owner = THIS_MODULE; + gc->get_direction = mt7530_gpio_get_direction; + gc->direction_input = mt7530_gpio_direction_input; + gc->direction_output = mt7530_gpio_direction_output; + gc->get = mt7530_gpio_get; + gc->set = mt7530_gpio_set; + gc->base = -1; + gc->ngpio = 15; + gc->can_sleep = true; + + return devm_gpiochip_add_data(dev, gc, priv); +} + static int mt7530_setup(struct dsa_switch *ds) { @@ -1763,6 +1867,12 @@ mt7530_setup(struct dsa_switch *ds) } } + if (of_property_read_bool(priv->dev->of_node, "gpio-controller")) { + ret = mt7530_setup_gpio(priv); + if (ret) + return ret; + } + mt7530_setup_port5(ds, interface); /* Flush the FDB table */ diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h index 32d8969b3ace..64a9bb377e15 100644 --- a/drivers/net/dsa/mt7530.h +++ b/drivers/net/dsa/mt7530.h @@ -554,6 +554,26 @@ enum mt7531_clk_skew { #define MT7531_GPIO12_RG_RXD3_MASK GENMASK(19, 16) #define MT7531_EXT_P_MDIO_12 (2 << 16) +/* Registers for LED GPIO control (MT7530 only) + * All registers follow this pattern: + * [ 2: 0] port 0 + * [ 6: 4] port 1 + * [10: 8] port 2 + * [14:12] port 3 + * [18:16] port 4 + */ + +/* LED enable, 0: Disable, 1: Enable (Default) */ +#define MT7530_LED_EN 0x7d00 +/* LED mode, 0: GPIO mode, 1: PHY mode (Default) */ +#define MT7530_LED_IO_MODE 0x7d04 +/* GPIO direction, 0: Input, 1: Output */ +#define MT7530_LED_GPIO_DIR 0x7d10 +/* GPIO output enable, 0: Disable, 1: Enable */ +#define MT7530_LED_GPIO_OE 0x7d14 +/* GPIO value, 0: Low, 1: High */ +#define MT7530_LED_GPIO_DATA 0x7d18 + #define MT7530_CREV 0x7ffc #define CHIP_NAME_SHIFT 16 #define MT7530_ID 0x7530