From patchwork Fri May 26 15:06:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: jerome Neanne X-Patchwork-Id: 686253 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 7ED0EC77B7A for ; Fri, 26 May 2023 15:06:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243615AbjEZPGj (ORCPT ); Fri, 26 May 2023 11:06:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243553AbjEZPGh (ORCPT ); Fri, 26 May 2023 11:06:37 -0400 Received: from mail-wm1-x333.google.com (mail-wm1-x333.google.com [IPv6:2a00:1450:4864:20::333]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9C8DD189 for ; Fri, 26 May 2023 08:06:33 -0700 (PDT) Received: by mail-wm1-x333.google.com with SMTP id 5b1f17b1804b1-3f60804faf4so6131035e9.3 for ; Fri, 26 May 2023 08:06:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20221208.gappssmtp.com; s=20221208; t=1685113592; x=1687705592; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=LKTH81b370yGsj0Bj77+q3zvxUAxQL2ovgBhVwN95eY=; b=wJ9oYyd9sfyF74/N5r09gXcKAm1EopLUeaV13YdnRhoX0HJvQihKSs7eBTDOxOb2ML yP33ruHwEB2aCJKMt41HnLgaBD1q00cp0nvyooPoSI3jrBnfajVFo2h8rqMvI8JUx3Ve QMv0qFZXAwflNydZZLB16AEbmQ38HescgKt6nnhfvI4Wi9DrS7i5Y1xyv9DxMXQkVJ1Z W9jlsYaKkUuFwVnIUwJKyMXZ5/OJ9y3ycNF6mRMcHV4D8jVr9mXrNhUg/1nI54DoJp4a j3MRjyaOjJOjOGxYHCJSQ6vcYF+4XOua146py7N7cUfqBPZjPZIKdBzA0266QSkdJYZH U9yQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685113592; x=1687705592; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=LKTH81b370yGsj0Bj77+q3zvxUAxQL2ovgBhVwN95eY=; b=QSnceVA1dfNA+YHn9iK9sXQuH5BTPiVXAcACfv/kPryZQWo8bjE8inKLjhnuWAb5ks h2XS3nCznc/2/azP2vKe3b1TiBwtPk2KvFXXnPkx8sbzB5qJ0nME//WYK7TqctS8ytlw mUGab4xamqc/LNYVffGt9E6sFtleOBq5djMf8UDBSwQxAcCGtMl7Bj7nJKfnZP4gOvOC 56cDy/pW7TJ7aM81xSXJWh0273yLZwuHaueVbESiHGn7F6+raofJOWF4NUawFiRW4QLE rQpwQmrR28FA/MXEzoL0+eJxhkgDJ41GC1CKpcfhK1+cZ4jO2UJCu5oqzC7vzLFwf3SH /7bg== X-Gm-Message-State: AC+VfDyw2MrGPHBjZbYVHJjkxIcZmUybv8UcGjiZ3fKE8nR0QqyVK8Vw 9TNH4w80n5mXYy7J6XG89l9nMA== X-Google-Smtp-Source: ACHHUZ6E8V8TATQJrsI/T4dy+qazrev84CO1fusGRjKnDWSzprwOreDWbNOQI43vlnGiIP89iC9KfQ== X-Received: by 2002:a1c:4c0d:0:b0:3f6:13e1:16b7 with SMTP id z13-20020a1c4c0d000000b003f613e116b7mr1759030wmf.28.1685113591905; Fri, 26 May 2023 08:06:31 -0700 (PDT) Received: from [127.0.1.1] (laubervilliers-658-1-213-31.w90-63.abo.wanadoo.fr. [90.63.244.31]) by smtp.gmail.com with ESMTPSA id s17-20020a5d69d1000000b00304adbeeabbsm5422146wrw.99.2023.05.26.08.06.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 May 2023 08:06:31 -0700 (PDT) From: Jerome Neanne Date: Fri, 26 May 2023 17:06:03 +0200 Subject: [PATCH v3 1/2] gpio: tps65219: add GPIO support for TPS65219 PMIC MIME-Version: 1.0 Message-Id: <20230511-tps65219-add-gpio-support-v3-1-19837a34d820@baylibre.com> References: <20230511-tps65219-add-gpio-support-v3-0-19837a34d820@baylibre.com> In-Reply-To: <20230511-tps65219-add-gpio-support-v3-0-19837a34d820@baylibre.com> To: Linus Walleij , Bartosz Golaszewski , Tony Lindgren , Lee Jones Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-omap@vger.kernel.org, Jonathan Cormier , Jerome Neanne X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1685113589; l=8706; i=jneanne@baylibre.com; s=20230511; h=from:subject:message-id; bh=VCVyuEj1jrFciXfty2lIWT6W0hl+p4tRTma+3hjygTY=; b=Fmo+lHUfG1ikGm7rgSnvy8JgMJvwJhONafzo/VuFJ0r7CJEaAvvYANe91pRVlQwmKPgON0zil nuM1iC95Rp0DreKfSjrO8M4tNLm54CLinHs/c9cD37OqPvMhj6OHb8g X-Developer-Key: i=jneanne@baylibre.com; a=ed25519; pk=5rvbqNoG+28jQjC9/50ToY7TgKWf9rJukuCI8b6jkUo= Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add support for TPS65219 PMICs GPIO interface. 3 GPIO pins: - GPIO0 only is IO but input mode reserved for MULTI_DEVICE_ENABLE usage - GPIO1 and GPIO2 are Output only and referred as GPO1 and GPO2 in spec GPIO0 is statically configured as input or output prior to Linux boot. it is used for MULTI_DEVICE_ENABLE function. This setting is statically configured by NVM. GPIO0 can't be used as a generic GPIO (specification Table 8-34). It's either a GPO when MULTI_DEVICE_EN=0, or a GPI when MULTI_DEVICE_EN=1. Datasheet describes specific usage for non standard GPIO. Link: https://www.ti.com/lit/ds/symlink/tps65219.pdf Co-developed-by: Jonathan Cormier Signed-off-by: Jonathan Cormier Signed-off-by: Jerome Neanne --- MAINTAINERS | 1 + drivers/gpio/Kconfig | 17 ++++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-tps65219.c | 183 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 202 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index c0cde28c62c6..d912b7465e84 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15398,6 +15398,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git F: arch/arm/configs/omap2plus_defconfig F: arch/arm/mach-omap2/ F: drivers/bus/ti-sysc.c +F: drivers/gpio/gpio-tps65219.c F: drivers/i2c/busses/i2c-omap.c F: drivers/irqchip/irq-omap-intc.c F: drivers/mfd/*omap*.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 5521f060d58e..f4e37881d01a 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1440,6 +1440,23 @@ config GPIO_TPS65218 Select this option to enable GPIO driver for the TPS65218 chip family. +config GPIO_TPS65219 + tristate "TPS65219 GPIO" + depends on MFD_TPS65219 + default MFD_TPS65219 + help + Select this option to enable GPIO driver for the TPS65219 + chip family. + GPIO0 is statically configured as input or output prior to Linux boot. + it is used for MULTI_DEVICE_ENABLE function. + This setting is statically configured by NVM. + GPIO0 can't be used as a generic GPIO. + It's either a GPO when MULTI_DEVICE_EN=0, + or a GPI when MULTI_DEVICE_EN=1. + + This driver can also be built as a module. If so, the + module will be called gpio_tps65219. + config GPIO_TPS6586X bool "TPS6586X GPIO" depends on MFD_TPS6586X diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 20036af3acb1..7843b16f5d59 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -160,6 +160,7 @@ obj-$(CONFIG_GPIO_TN48M_CPLD) += gpio-tn48m.o obj-$(CONFIG_GPIO_TPIC2810) += gpio-tpic2810.o obj-$(CONFIG_GPIO_TPS65086) += gpio-tps65086.o obj-$(CONFIG_GPIO_TPS65218) += gpio-tps65218.o +obj-$(CONFIG_GPIO_TPS65219) += gpio-tps65219.o obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o diff --git a/drivers/gpio/gpio-tps65219.c b/drivers/gpio/gpio-tps65219.c new file mode 100644 index 000000000000..34759d3cd476 --- /dev/null +++ b/drivers/gpio/gpio-tps65219.c @@ -0,0 +1,183 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * GPIO driver for TI TPS65219 PMICs + * + * Copyright (C) 2022 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#include +#include +#include +#include +#include + +#define TPS65219_GPIO0_DIR_MASK BIT(3) +#define TPS65219_GPIO0_OFFSET 2 +#define TPS65219_GPIO0_IDX 0 +#define TPS65219_GPIO_DIR_IN 1 +#define TPS65219_GPIO_DIR_OUT 0 + +struct tps65219_gpio { + struct gpio_chip gpio_chip; + struct tps65219 *tps; +}; + +static int tps65219_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct tps65219_gpio *gpio = gpiochip_get_data(gc); + int ret, val; + + if (offset != TPS65219_GPIO0_IDX) + return GPIO_LINE_DIRECTION_OUT; + + ret = regmap_read(gpio->tps->regmap, TPS65219_REG_MFP_1_CONFIG, &val); + if (ret) + return ret; + + return !!(val & TPS65219_GPIO0_DIR_MASK); +} + +static int tps65219_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct tps65219_gpio *gpio = gpiochip_get_data(gc); + int ret, val; + + if (offset != TPS65219_GPIO0_IDX) { + dev_err(gpio->tps->dev, + "GPIO%d is output only, cannot get\n", + offset); + return -EOPNOTSUPP; + } + + ret = regmap_read(gpio->tps->regmap, TPS65219_REG_MFP_CTRL, &val); + if (ret) + return ret; + + dev_warn(gpio->tps->dev, + "GPIO%d = %d, used for MULTI_DEVICE_ENABLE, not as standard GPIO\n", + offset, !!(val & BIT(TPS65219_MFP_GPIO_STATUS_MASK))); + + /* depends on NVM config return error if dir output else the GPIO0 status bit */ + if (tps65219_gpio_get_direction(gc, offset) == TPS65219_GPIO_DIR_OUT) + return -EOPNOTSUPP; + + return !!(val & BIT(TPS65219_MFP_GPIO_STATUS_MASK)); +} + +static void tps65219_gpio_set(struct gpio_chip *gc, unsigned int offset, + int value) +{ + struct tps65219_gpio *gpio = gpiochip_get_data(gc); + int v, mask, bit; + + bit = (offset == TPS65219_GPIO0_IDX) ? TPS65219_GPIO0_OFFSET : offset - 1; + + mask = BIT(bit); + v = value ? mask : 0; + + if (regmap_update_bits(gpio->tps->regmap, TPS65219_REG_GENERAL_CONFIG, mask, v)) + dev_err(gpio->tps->dev, "GPIO%d, set to value %d failed.\n", offset, value); +} + +static int tps65219_gpio_change_direction(struct gpio_chip *gc, unsigned int offset, + unsigned int direction) +{ + struct tps65219_gpio *gpio = gpiochip_get_data(gc); + + /* Documentation is stating that GPIO0 direction must not be changed in Linux: + * Table 8-34. MFP_1_CONFIG(3): MULTI_DEVICE_ENABLE, + * Should only be changed in INITIALIZE state (prior to ON Request). + * Set statically by NVM, changing direction in application can cause a hang. + * Below can be used for test purpose only: + */ + + if (IS_ENABLED(DEBUG)) { + int ret = regmap_update_bits(gpio->tps->regmap, TPS65219_REG_MFP_1_CONFIG, + TPS65219_GPIO0_DIR_MASK, direction); + if (ret) { + dev_err(gpio->tps->dev, + "DEBUG enabled: Fail to change direction to %u for GPIO%d. \ + For test only\n", + direction, offset); + return ret; + } + } + + dev_err(gpio->tps->dev, + "GPIO%d direction set by NVM, change to %u failed, not allowed by specification\n", + offset, direction); + + return -EOPNOTSUPP; +} + +static int tps65219_gpio_direction_input(struct gpio_chip *gc, unsigned int offset) +{ + struct tps65219_gpio *gpio = gpiochip_get_data(gc); + + if (offset != TPS65219_GPIO0_IDX) { + dev_err(gpio->tps->dev, + "GPIO%d is output only, cannot change to input\n", + offset); + return -EOPNOTSUPP; + } + + if (tps65219_gpio_get_direction(gc, offset) == TPS65219_GPIO_DIR_IN) + return 0; + + return tps65219_gpio_change_direction(gc, offset, TPS65219_GPIO_DIR_IN); +} + +static int tps65219_gpio_direction_output(struct gpio_chip *gc, unsigned int offset, + int value) +{ + tps65219_gpio_set(gc, offset, value); + if (offset != TPS65219_GPIO0_IDX) + return 0; + + if (tps65219_gpio_get_direction(gc, offset) == TPS65219_GPIO_DIR_OUT) + return 0; + + return tps65219_gpio_change_direction(gc, offset, TPS65219_GPIO_DIR_OUT); +} + +static const struct gpio_chip tps65219_template_chip = { + .label = "tps65219-gpio", + .owner = THIS_MODULE, + .get_direction = tps65219_gpio_get_direction, + .direction_input = tps65219_gpio_direction_input, + .direction_output = tps65219_gpio_direction_output, + .get = tps65219_gpio_get, + .set = tps65219_gpio_set, + .base = -1, + .ngpio = 3, + .can_sleep = true, +}; + +static int tps65219_gpio_probe(struct platform_device *pdev) +{ + struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent); + struct tps65219_gpio *gpio; + + gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + gpio->tps = tps; + gpio->gpio_chip = tps65219_template_chip; + gpio->gpio_chip.parent = tps->dev; + + return devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip, gpio); +} + +static struct platform_driver tps65219_gpio_driver = { + .driver = { + .name = "tps65219-gpio", + }, + .probe = tps65219_gpio_probe, +}; +module_platform_driver(tps65219_gpio_driver); + +MODULE_ALIAS("platform:tps65219-gpio"); +MODULE_AUTHOR("Jonathan Cormier "); +MODULE_DESCRIPTION("TPS65219 GPIO driver"); +MODULE_LICENSE("GPL");