From patchwork Thu Nov 15 08:01:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 151197 Delivered-To: patch@linaro.org Received: by 2002:a2e:299d:0:0:0:0:0 with SMTP id p29-v6csp6691507ljp; Thu, 15 Nov 2018 00:01:44 -0800 (PST) X-Google-Smtp-Source: AJdET5fJZME9nzZ/AAUyklA1n4DxmX9VuxMTKppNAROjJ62U/0vyTNBNqFiyCMeyeSoBLZ81a7jp X-Received: by 2002:a63:d513:: with SMTP id c19mr4853652pgg.287.1542268904108; Thu, 15 Nov 2018 00:01:44 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1542268904; cv=none; d=google.com; s=arc-20160816; b=pwOOS29eFpHo5ADsa0o+Bpg0lc7qPPJOMADxfLlSepiSQlcBTNft/ncergcpZGhZkH jLVAJTJOtJ5frz33xu6l9txPwWZ3CEB5TEj8HHagmuW+Kc5xL/uLDqrNh1dWJvzM2wrI 6J62YFntTRu4RVMMtQv5ZPRQR4p2+Wl52a93S0RjHxkXseMyf1gOvIg1SWqn8KTyNAKd apSBpMfci88ODkAUednSJ5cALFMxSynyINGJ2GJbtt9xmzbHZX7g3Ran5ASsUGLDs+aX 6oQ1FIuXapcG9n1MocT/UmkTGlV26tHtkx53jG+36y7DZnQo9dAZ/kxh0gLYi1W5a42o seaQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature; bh=thTrAf6DNl+AdTfHofcmgWNbN2epGPDXGIY7Q7pHxno=; b=x/u73gS2X+/BxIR8IEDPBINCiPNZQBJZ4nHAN4J4So/5C1jVkzUPIsVcb1IppdSiUG 2nS3Zl0lCkocavnX/0Oowi96HY+vREjIlTEZItUo1k1rwPLJtnfDQKaiGdP8aJICPzaB tJQfLEoyp/B9DFvb/JthNGmhkVA2ORkWn25gP/tOw1Nr4gydB5QFZhWGAAUpXnSfxTWP o11N2qPoAt8i17Qa4LIyG7mA0t9TxBtWXGiZDKJSQodXCdQBSyCgbihKe/4krMmDjoQo PmZDvyhe98e48lXgOyEhUrq4SidygkcsiDT2dk4iwI8y9lbtf2MX/wGKkt0JJZu66rGe Li7w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=B9Q7vafl; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id i12-v6si26096580plt.9.2018.11.15.00.01.43; Thu, 15 Nov 2018 00:01:44 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=B9Q7vafl; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729053AbeKOSI1 (ORCPT + 32 others); Thu, 15 Nov 2018 13:08:27 -0500 Received: from mail-lf1-f68.google.com ([209.85.167.68]:41679 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728748AbeKOSI0 (ORCPT ); Thu, 15 Nov 2018 13:08:26 -0500 Received: by mail-lf1-f68.google.com with SMTP id c16so13474860lfj.8 for ; Thu, 15 Nov 2018 00:01:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=thTrAf6DNl+AdTfHofcmgWNbN2epGPDXGIY7Q7pHxno=; b=B9Q7vaflS425klUJHcJlEMm4CwHBOebOfgJnrPYwsuoMJdlsvhI3Cb0FmC48RNbAek wSd9ELpLf+VVAQC+79guaMm5Yv00EV8NBP9VOQLxC+1kSqdQIzOtwiTbEOS0KSRbZMni TY4eBuCaWDOIgi87fFwCQir/UD1uulsb6uSYw= 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; bh=thTrAf6DNl+AdTfHofcmgWNbN2epGPDXGIY7Q7pHxno=; b=S/PbGc5e5WapyjIrA+lSf3HoX1rF3x3pS2ZKXFBm+3yRZL2zXb7OMi/DGFxXYUg3TL jnDWmAoXDzmLdcvh3D93MuC7Lc+ESFzDWSEIw2f4LTrnBdL821l8cd3AJgpeyx5QWUVg Ista8uUGy2pnKd4J5Tp8F6zxiAzFHzRoIRxiBuwyI4SEpo4bCv9XXefXxLh0+q+DKOWE xRlimEPiI3lKRXJpMTXTqFBAUgr/ZKOx9Uqqx+OqjINw/fUg/5otG5RizAbcC0nek+lb Zf8IAI35EFJULeU+9rqAVgKzwcWxnQVfU9i4blzaYoXkwVx4c2FNNnYz6/uES5c5tox0 2kkQ== X-Gm-Message-State: AGRZ1gLyKhsXvBoQcKelI34H332yp7fAFUOy8qx4i2SwgoL9e6KmGRmg r+yNL3K6OsCKc0yupMezhxiXpQ== X-Received: by 2002:a19:9a8c:: with SMTP id c134mr2677532lfe.152.1542268898996; Thu, 15 Nov 2018 00:01:38 -0800 (PST) Received: from genomnajs.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id o25sm4003427lfd.29.2018.11.15.00.01.37 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 15 Nov 2018 00:01:37 -0800 (PST) From: Linus Walleij To: Liam Girdwood , Mark Brown Cc: linux-kernel@vger.kernel.org, Bartosz Golaszewski , Linus Walleij , Philipp Zabel , Petr Cvek , Robert Jarzmik , Paul Parsons Subject: [PATCH 4/8 v6] regulator: gpio: Convert to use descriptors Date: Thu, 15 Nov 2018 09:01:20 +0100 Message-Id: <20181115080124.7789-5-linus.walleij@linaro.org> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20181115080124.7789-1-linus.walleij@linaro.org> References: <20181115080124.7789-1-linus.walleij@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This converts the GPIO regulator driver to use decriptors only. We have to let go of the array gpio handling: the fetched descriptors are handled individually anyway, and the array retrieveal function does not make it possible to retrieve each GPIO descriptor with unique flags. Instead get them one by one. We request the "enable" GPIO separately as before, and make sure that this line is requested as nonexclusive since enable lines can be shared and the regulator core expects this. Most users of the GPIO regulator are using device tree. There are two boards in the kernel using the gpio regulator from a non-devicetree path: PXA hx4700 and magician. Make sure to switch these over to use descriptors as well. Cc: Philipp Zabel # Magician Cc: Petr Cvek # Magician Cc: Robert Jarzmik # PXA Cc: Paul Parsons # hx4700 Signed-off-by: Linus Walleij --- ChangeLog v3->v6: - Make sure to request the GPIO line nonexclusive as with other regulator GPIOs. - Request the voltage controlling GPIOs from the name NULL as only "enable-gpio" is explicitly named. - Make sure to delete all unused struct members and assignments in board files. - Change numbering to fit the rest of the patches. ChangeLog v2->v3: - Resending. ChangeLog v1->v2: - Rebase the patch on the other changes. --- arch/arm/mach-pxa/hx4700.c | 23 ++-- arch/arm/mach-pxa/magician.c | 23 ++-- drivers/regulator/gpio-regulator.c | 146 ++++++++--------------- include/linux/regulator/gpio-regulator.h | 12 +- 4 files changed, 91 insertions(+), 113 deletions(-) -- 2.17.2 diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c index b79b757fdd41..51d38d5e776a 100644 --- a/arch/arm/mach-pxa/hx4700.c +++ b/arch/arm/mach-pxa/hx4700.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -702,9 +703,7 @@ static struct regulator_init_data bq24022_init_data = { .consumer_supplies = bq24022_consumers, }; -static struct gpio bq24022_gpios[] = { - { GPIO96_HX4700_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" }, -}; +static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW }; static struct gpio_regulator_state bq24022_states[] = { { .value = 100000, .gpios = (0 << 0) }, @@ -714,12 +713,10 @@ static struct gpio_regulator_state bq24022_states[] = { static struct gpio_regulator_config bq24022_info = { .supply_name = "bq24022", - .enable_gpio = GPIO72_HX4700_BQ24022_nCHARGE_EN, - .enable_high = 0, .enabled_at_boot = 0, - .gpios = bq24022_gpios, - .nr_gpios = ARRAY_SIZE(bq24022_gpios), + .gflags = bq24022_gpiod_gflags, + .ngpios = ARRAY_SIZE(bq24022_gpiod_gflags), .states = bq24022_states, .nr_states = ARRAY_SIZE(bq24022_states), @@ -736,6 +733,17 @@ static struct platform_device bq24022 = { }, }; +static struct gpiod_lookup_table bq24022_gpiod_table = { + .dev_id = "gpio-regulator", + .table = { + GPIO_LOOKUP("gpio-pxa", GPIO96_HX4700_BQ24022_ISET2, + NULL, GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN, + "enable", GPIO_ACTIVE_LOW), + { }, + }, +}; + /* * StrataFlash */ @@ -878,6 +886,7 @@ static void __init hx4700_init(void) pxa_set_btuart_info(NULL); pxa_set_stuart_info(NULL); + gpiod_add_lookup_table(&bq24022_gpiod_table); platform_add_devices(devices, ARRAY_SIZE(devices)); pwm_add_table(hx4700_pwm_lookup, ARRAY_SIZE(hx4700_pwm_lookup)); diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c index 14c0f80bc9e7..5d21de79135b 100644 --- a/arch/arm/mach-pxa/magician.c +++ b/arch/arm/mach-pxa/magician.c @@ -645,9 +645,8 @@ static struct regulator_init_data bq24022_init_data = { .consumer_supplies = bq24022_consumers, }; -static struct gpio bq24022_gpios[] = { - { EGPIO_MAGICIAN_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" }, -}; + +static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW }; static struct gpio_regulator_state bq24022_states[] = { { .value = 100000, .gpios = (0 << 0) }, @@ -657,12 +656,10 @@ static struct gpio_regulator_state bq24022_states[] = { static struct gpio_regulator_config bq24022_info = { .supply_name = "bq24022", - .enable_gpio = GPIO30_MAGICIAN_BQ24022_nCHARGE_EN, - .enable_high = 0, .enabled_at_boot = 1, - .gpios = bq24022_gpios, - .nr_gpios = ARRAY_SIZE(bq24022_gpios), + .gflags = bq24022_gpiod_gflags, + .ngpios = ARRAY_SIZE(bq24022_gpiod_gflags), .states = bq24022_states, .nr_states = ARRAY_SIZE(bq24022_states), @@ -679,6 +676,17 @@ static struct platform_device bq24022 = { }, }; +static struct gpiod_lookup_table bq24022_gpiod_table = { + .dev_id = "gpio-regulator", + .table = { + GPIO_LOOKUP("gpio-pxa", EGPIO_MAGICIAN_BQ24022_ISET2, + NULL, GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN, + "enable", GPIO_ACTIVE_LOW), + { }, + }, +}; + /* * fixed regulator for ads7846 */ @@ -1007,6 +1015,7 @@ static void __init magician_init(void) regulator_register_always_on(0, "power", pwm_backlight_supply, ARRAY_SIZE(pwm_backlight_supply), 5000000); + gpiod_add_lookup_table(&bq24022_gpiod_table); platform_add_devices(ARRAY_AND_SIZE(devices)); } diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c index b2f5ec4f658a..68a6c861bcad 100644 --- a/drivers/regulator/gpio-regulator.c +++ b/drivers/regulator/gpio-regulator.c @@ -30,16 +30,15 @@ #include #include #include -#include +#include #include #include -#include struct gpio_regulator_data { struct regulator_desc desc; struct regulator_dev *dev; - struct gpio *gpios; + struct gpio_desc **gpiods; int nr_gpios; struct gpio_regulator_state *states; @@ -82,7 +81,7 @@ static int gpio_regulator_set_voltage(struct regulator_dev *dev, for (ptr = 0; ptr < data->nr_gpios; ptr++) { state = (target & (1 << ptr)) >> ptr; - gpio_set_value_cansleep(data->gpios[ptr].gpio, state); + gpiod_set_value_cansleep(data->gpiods[ptr], state); } data->state = target; @@ -119,7 +118,7 @@ static int gpio_regulator_set_current_limit(struct regulator_dev *dev, for (ptr = 0; ptr < data->nr_gpios; ptr++) { state = (target & (1 << ptr)) >> ptr; - gpio_set_value_cansleep(data->gpios[ptr].gpio, state); + gpiod_set_value_cansleep(data->gpiods[ptr], state); } data->state = target; @@ -138,7 +137,8 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np, { struct gpio_regulator_config *config; const char *regtype; - int proplen, gpio, i; + int proplen, i; + int ngpios; int ret; config = devm_kzalloc(dev, @@ -153,59 +153,36 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np, config->supply_name = config->init_data->constraints.name; - if (of_property_read_bool(np, "enable-active-high")) - config->enable_high = true; - if (of_property_read_bool(np, "enable-at-boot")) config->enabled_at_boot = true; of_property_read_u32(np, "startup-delay-us", &config->startup_delay); - config->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0); - if (config->enable_gpio < 0 && config->enable_gpio != -ENOENT) - return ERR_PTR(config->enable_gpio); - - /* Fetch GPIOs. - optional property*/ - ret = of_gpio_count(np); - if ((ret < 0) && (ret != -ENOENT)) - return ERR_PTR(ret); - - if (ret > 0) { - config->nr_gpios = ret; - config->gpios = devm_kcalloc(dev, - config->nr_gpios, sizeof(struct gpio), - GFP_KERNEL); - if (!config->gpios) + /* Fetch GPIO init levels */ + ngpios = gpiod_count(dev, NULL); + if (ngpios > 0) { + config->gflags = devm_kzalloc(dev, + sizeof(enum gpiod_flags) + * ngpios, + GFP_KERNEL); + if (!config->gflags) return ERR_PTR(-ENOMEM); - proplen = of_property_count_u32_elems(np, "gpios-states"); - /* optional property */ - if (proplen < 0) - proplen = 0; + for (i = 0; i < ngpios; i++) { + u32 val; - if (proplen > 0 && proplen != config->nr_gpios) { - dev_warn(dev, "gpios <-> gpios-states mismatch\n"); - proplen = 0; - } + ret = of_property_read_u32_index(np, "gpios-states", i, + &val); - for (i = 0; i < config->nr_gpios; i++) { - gpio = of_get_named_gpio(np, "gpios", i); - if (gpio < 0) { - if (gpio != -ENOENT) - return ERR_PTR(gpio); - break; - } - config->gpios[i].gpio = gpio; - config->gpios[i].label = config->supply_name; - if (proplen > 0) { - of_property_read_u32_index(np, "gpios-states", - i, &ret); - if (ret) - config->gpios[i].flags = - GPIOF_OUT_INIT_HIGH; - } + /* Default to high per specification */ + if (ret) + config->gflags[i] = GPIOD_OUT_HIGH; + else + config->gflags[i] = + val ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; } } + config->ngpios = ngpios; /* Fetch states. */ proplen = of_property_count_u32_elems(np, "states"); @@ -255,7 +232,8 @@ static int gpio_regulator_probe(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; struct gpio_regulator_data *drvdata; struct regulator_config cfg = { }; - int ptr, ret, state; + enum gpiod_flags gflags; + int ptr, ret, state, i; drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data), GFP_KERNEL); @@ -275,26 +253,17 @@ static int gpio_regulator_probe(struct platform_device *pdev) return -ENOMEM; } - if (config->nr_gpios != 0) { - drvdata->gpios = kmemdup(config->gpios, - config->nr_gpios * sizeof(struct gpio), - GFP_KERNEL); - if (drvdata->gpios == NULL) { - dev_err(&pdev->dev, "Failed to allocate gpio data\n"); - ret = -ENOMEM; - goto err_name; - } - - drvdata->nr_gpios = config->nr_gpios; - ret = gpio_request_array(drvdata->gpios, drvdata->nr_gpios); - if (ret) { - if (ret != -EPROBE_DEFER) - dev_err(&pdev->dev, - "Could not obtain regulator setting GPIOs: %d\n", - ret); - goto err_memgpio; - } + for (i = 0; i < config->ngpios; i++) { + drvdata->gpiods[i] = devm_gpiod_get_index(&pdev->dev, + NULL, + i, + config->gflags[i]); + if (IS_ERR(drvdata->gpiods[i])) + return PTR_ERR(drvdata->gpiods[i]); + /* This is good to know */ + gpiod_set_consumer_name(drvdata->gpiods[i], drvdata->desc.name); } + drvdata->nr_gpios = config->ngpios; drvdata->states = kmemdup(config->states, config->nr_states * @@ -303,7 +272,7 @@ static int gpio_regulator_probe(struct platform_device *pdev) if (drvdata->states == NULL) { dev_err(&pdev->dev, "Failed to allocate state data\n"); ret = -ENOMEM; - goto err_stategpio; + goto err_name; } drvdata->nr_states = config->nr_states; @@ -330,7 +299,7 @@ static int gpio_regulator_probe(struct platform_device *pdev) /* build initial state from gpio init data. */ state = 0; for (ptr = 0; ptr < drvdata->nr_gpios; ptr++) { - if (config->gpios[ptr].flags & GPIOF_OUT_INIT_HIGH) + if (config->gflags[ptr] == GPIOD_OUT_HIGH) state |= (1 << ptr); } drvdata->state = state; @@ -340,21 +309,19 @@ static int gpio_regulator_probe(struct platform_device *pdev) cfg.driver_data = drvdata; cfg.of_node = np; - if (gpio_is_valid(config->enable_gpio)) { - cfg.ena_gpio = config->enable_gpio; - cfg.ena_gpio_initialized = true; - } - cfg.ena_gpio_invert = !config->enable_high; - if (config->enabled_at_boot) { - if (config->enable_high) - cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH; - else - cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW; - } else { - if (config->enable_high) - cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW; - else - cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH; + /* + * The signal will be inverted by the GPIO core if flagged so in the + * decriptor. + */ + if (config->enabled_at_boot) + gflags = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE; + else + gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE; + + cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags); + if (IS_ERR(cfg.ena_gpiod)) { + ret = PTR_ERR(cfg.ena_gpiod); + goto err_memstate; } drvdata->dev = regulator_register(&drvdata->desc, &cfg); @@ -370,10 +337,6 @@ static int gpio_regulator_probe(struct platform_device *pdev) err_memstate: kfree(drvdata->states); -err_stategpio: - gpio_free_array(drvdata->gpios, drvdata->nr_gpios); -err_memgpio: - kfree(drvdata->gpios); err_name: kfree(drvdata->desc.name); return ret; @@ -384,12 +347,7 @@ static int gpio_regulator_remove(struct platform_device *pdev) struct gpio_regulator_data *drvdata = platform_get_drvdata(pdev); regulator_unregister(drvdata->dev); - - gpio_free_array(drvdata->gpios, drvdata->nr_gpios); - kfree(drvdata->states); - kfree(drvdata->gpios); - kfree(drvdata->desc.name); return 0; diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h index 19fbd267406d..49c407afb944 100644 --- a/include/linux/regulator/gpio-regulator.h +++ b/include/linux/regulator/gpio-regulator.h @@ -21,6 +21,8 @@ #ifndef __REGULATOR_GPIO_H #define __REGULATOR_GPIO_H +#include + struct regulator_init_data; enum regulator_type; @@ -53,9 +55,9 @@ struct gpio_regulator_state { * This is used to keep the regulator at * the default state * @startup_delay: Start-up time in microseconds - * @gpios: Array containing the gpios needed to control - * the setting of the regulator - * @nr_gpios: Number of gpios + * @gflags: Array of GPIO configuration flags for initial + * states + * @ngpios: Number of GPIOs and configurations available * @states: Array of gpio_regulator_state entries describing * the gpio state for specific voltages * @nr_states: Number of states available @@ -74,8 +76,8 @@ struct gpio_regulator_config { unsigned enabled_at_boot:1; unsigned startup_delay; - struct gpio *gpios; - int nr_gpios; + enum gpiod_flags *gflags; + int ngpios; struct gpio_regulator_state *states; int nr_states;