From patchwork Mon Feb 10 10:15:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 11373007 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0892914E3 for ; Mon, 10 Feb 2020 10:15:18 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DA2E220733 for ; Mon, 10 Feb 2020 10:15:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="UWe16Bll" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA2E220733 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DEC0F89B8E; Mon, 10 Feb 2020 10:15:14 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-lf1-x143.google.com (mail-lf1-x143.google.com [IPv6:2a00:1450:4864:20::143]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9A0BF89B8E for ; Mon, 10 Feb 2020 10:15:13 +0000 (UTC) Received: by mail-lf1-x143.google.com with SMTP id n25so3789789lfl.0 for ; Mon, 10 Feb 2020 02:15:13 -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:mime-version :content-transfer-encoding; bh=MBLnankq1uCCwRGHTNFRB7dHy4CZy+w24kG9dUYnTAw=; b=UWe16Bllu+K7l5jM4AmH2+kk40dGEF68dSCa8tvHhJLFyxvcTHuvfdg+3t1CWCh4lw VZKncXKYCw+Ykw4+BmSrvmcHmq242S2BEi8Q3SOBhrr3VJicTw/p6PHWNnlplx7CRLeq aPDFsVLx6rtgVViY09P143O1fHWgf3I98DZjT05DTooYxwhnm0wuSWHm00ecIfuptbxe Eju6ncKRxJTGFhe6IljaHMe26FsUwalR/u5bvoLJBFotR+KNvV2Syb2/vBtMcFD+Whfj NXjzmRzNZfg30PwfNCAaHVD1ZOe4GJLJqk0Wpa8pnya4aWvAvPksizO3Eh1d7OxXr/Zm QGeg== 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:mime-version :content-transfer-encoding; bh=MBLnankq1uCCwRGHTNFRB7dHy4CZy+w24kG9dUYnTAw=; b=KnNUPk+eJ0jEulDL+EAd1lw2JE8+JI3pVmFglLMTZHgrNe/QRTsW7qrBOYSTOrV/eZ fkYfguMbVOK3Wghrjmd+mckwTyKF6fgwdPH8UAm6EC/diL1OKUVo5DD3T1vE0GS0S0PU egOes2hmveipgS5GzIXFxoNcXG4k1nZ+FPJFm1Jz9on+jw36GkrXnHiiz7xkj+nARdBO Paa5k2YS2Lm0je8FIDN0kH95marcPFI/VJJ9dSJLTScopbG11BS6vfawx7cLZp6dKEho DC3cJkqRDWX/LwYs3T96Ix6H2C2qAyEtAt2WPoIZMymI151rotKTBnmpkYfwV+fMHbEY kDzA== X-Gm-Message-State: APjAAAUXR90trzCVhE33IxOzfiyEWrL0M27Yh84ZFCM3m0B5jJk3hoKf U0p7DBpByWkKZGUh+S9Uks1JqA== X-Google-Smtp-Source: APXvYqyySln5rCCqzm+PvKtHDaCFlCg1gTAUeEJ0k/x0f26AHhZ9L/2PkD870kAtO24f/VAnKwjsYA== X-Received: by 2002:ac2:5147:: with SMTP id q7mr365303lfd.87.1581329711787; Mon, 10 Feb 2020 02:15:11 -0800 (PST) Received: from genomnajs.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id d11sm5063841lfj.3.2020.02.10.02.15.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2020 02:15:11 -0800 (PST) From: Linus Walleij To: Lee Jones , Daniel Thompson , Jingoo Han , dri-devel@lists.freedesktop.org Subject: [PATCH v2] backlight: corgi: Convert to use GPIO descriptors Date: Mon, 10 Feb 2020 11:15:04 +0100 Message-Id: <20200210101504.287366-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Robert Jarzmik , Andrea Adami Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The code in the Corgi backlight driver can be considerably simplified by moving to GPIO descriptors and lookup tables from the board files instead of passing GPIO numbers using the old API. Make sure to encode inversion semantics for the Akita and Spitz platforms inside the GPIO lookup table and drop the custom inversion semantics from the driver. All in-tree users are converted in this patch. Cc: Andrea Adami Acked-by: Robert Jarzmik Signed-off-by: Linus Walleij --- ChangeLog v1->v2: - Collect Robert's ACK. --- arch/arm/mach-pxa/corgi.c | 12 ++++- arch/arm/mach-pxa/spitz.c | 34 +++++++++++---- drivers/video/backlight/corgi_lcd.c | 68 ++++++++--------------------- include/linux/spi/corgi_lcd.h | 3 -- 4 files changed, 54 insertions(+), 63 deletions(-) diff --git a/arch/arm/mach-pxa/corgi.c b/arch/arm/mach-pxa/corgi.c index f2d73289230f..c9625dcae27c 100644 --- a/arch/arm/mach-pxa/corgi.c +++ b/arch/arm/mach-pxa/corgi.c @@ -563,13 +563,20 @@ static void corgi_bl_kick_battery(void) } } +static struct gpiod_lookup_table corgi_lcdcon_gpio_table = { + .dev_id = "spi0.1", + .table = { + GPIO_LOOKUP("gpio-pxa", CORGI_GPIO_BACKLIGHT_CONT, + "BL_CONT", GPIO_ACTIVE_HIGH), + { }, + }, +}; + static struct corgi_lcd_platform_data corgi_lcdcon_info = { .init_mode = CORGI_LCD_MODE_VGA, .max_intensity = 0x2f, .default_intensity = 0x1f, .limit_mask = 0x0b, - .gpio_backlight_cont = CORGI_GPIO_BACKLIGHT_CONT, - .gpio_backlight_on = -1, .kick_battery = corgi_bl_kick_battery, }; @@ -609,6 +616,7 @@ static struct spi_board_info corgi_spi_devices[] = { static void __init corgi_init_spi(void) { pxa2xx_set_spi_info(1, &corgi_spi_info); + gpiod_add_lookup_table(&corgi_lcdcon_gpio_table); spi_register_board_info(ARRAY_AND_SIZE(corgi_spi_devices)); } #else diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c index a4fdc399d152..82e80a257c0f 100644 --- a/arch/arm/mach-pxa/spitz.c +++ b/arch/arm/mach-pxa/spitz.c @@ -525,13 +525,33 @@ static void spitz_bl_kick_battery(void) } } +static struct gpiod_lookup_table spitz_lcdcon_gpio_table = { + .dev_id = "spi0.1", + .table = { + GPIO_LOOKUP("gpio-pxa", SPITZ_GPIO_BACKLIGHT_CONT, + "BL_CONT", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("gpio-pxa", SPITZ_GPIO_BACKLIGHT_ON, + "BL_ON", GPIO_ACTIVE_HIGH), + { }, + }, +}; + +static struct gpiod_lookup_table akita_lcdcon_gpio_table = { + .dev_id = "spi0.1", + .table = { + GPIO_LOOKUP("gpio-pxa", AKITA_GPIO_BACKLIGHT_CONT, + "BL_CONT", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("gpio-pxa", AKITA_GPIO_BACKLIGHT_ON, + "BL_ON", GPIO_ACTIVE_HIGH), + { }, + }, +}; + static struct corgi_lcd_platform_data spitz_lcdcon_info = { .init_mode = CORGI_LCD_MODE_VGA, .max_intensity = 0x2f, .default_intensity = 0x1f, .limit_mask = 0x0b, - .gpio_backlight_cont = SPITZ_GPIO_BACKLIGHT_CONT, - .gpio_backlight_on = SPITZ_GPIO_BACKLIGHT_ON, .kick_battery = spitz_bl_kick_battery, }; @@ -574,12 +594,10 @@ static struct pxa2xx_spi_controller spitz_spi_info = { static void __init spitz_spi_init(void) { - struct corgi_lcd_platform_data *lcd_data = &spitz_lcdcon_info; - - if (machine_is_akita()) { - lcd_data->gpio_backlight_cont = AKITA_GPIO_BACKLIGHT_CONT; - lcd_data->gpio_backlight_on = AKITA_GPIO_BACKLIGHT_ON; - } + if (machine_is_akita()) + gpiod_add_lookup_table(&akita_lcdcon_gpio_table); + else + gpiod_add_lookup_table(&spitz_lcdcon_gpio_table); pxa2xx_set_spi_info(2, &spitz_spi_info); spi_register_board_info(ARRAY_AND_SIZE(spitz_spi_devices)); diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c index 68f7592c5060..25ef0cbd7583 100644 --- a/drivers/video/backlight/corgi_lcd.c +++ b/drivers/video/backlight/corgi_lcd.c @@ -15,7 +15,7 @@ #include #include #include -#include +#include #include #include #include @@ -90,9 +90,8 @@ struct corgi_lcd { int mode; char buf[2]; - int gpio_backlight_on; - int gpio_backlight_cont; - int gpio_backlight_cont_inverted; + struct gpio_desc *backlight_on; + struct gpio_desc *backlight_cont; void (*kick_battery)(void); }; @@ -403,13 +402,13 @@ static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity) corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity); /* Bit 5 via GPIO_BACKLIGHT_CONT */ - cont = !!(intensity & 0x20) ^ lcd->gpio_backlight_cont_inverted; + cont = !!(intensity & 0x20); - if (gpio_is_valid(lcd->gpio_backlight_cont)) - gpio_set_value_cansleep(lcd->gpio_backlight_cont, cont); + if (lcd->backlight_cont) + gpiod_set_value_cansleep(lcd->backlight_cont, cont); - if (gpio_is_valid(lcd->gpio_backlight_on)) - gpio_set_value_cansleep(lcd->gpio_backlight_on, intensity); + if (lcd->backlight_on) + gpiod_set_value_cansleep(lcd->backlight_on, intensity); if (lcd->kick_battery) lcd->kick_battery(); @@ -482,48 +481,17 @@ static int setup_gpio_backlight(struct corgi_lcd *lcd, struct corgi_lcd_platform_data *pdata) { struct spi_device *spi = lcd->spi_dev; - int err; - - lcd->gpio_backlight_on = -1; - lcd->gpio_backlight_cont = -1; - - if (gpio_is_valid(pdata->gpio_backlight_on)) { - err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_on, - "BL_ON"); - if (err) { - dev_err(&spi->dev, - "failed to request GPIO%d for backlight_on\n", - pdata->gpio_backlight_on); - return err; - } - - lcd->gpio_backlight_on = pdata->gpio_backlight_on; - gpio_direction_output(lcd->gpio_backlight_on, 0); - } - if (gpio_is_valid(pdata->gpio_backlight_cont)) { - err = devm_gpio_request(&spi->dev, pdata->gpio_backlight_cont, - "BL_CONT"); - if (err) { - dev_err(&spi->dev, - "failed to request GPIO%d for backlight_cont\n", - pdata->gpio_backlight_cont); - return err; - } - - lcd->gpio_backlight_cont = pdata->gpio_backlight_cont; - - /* spitz and akita use both GPIOs for backlight, and - * have inverted polarity of GPIO_BACKLIGHT_CONT - */ - if (gpio_is_valid(lcd->gpio_backlight_on)) { - lcd->gpio_backlight_cont_inverted = 1; - gpio_direction_output(lcd->gpio_backlight_cont, 1); - } else { - lcd->gpio_backlight_cont_inverted = 0; - gpio_direction_output(lcd->gpio_backlight_cont, 0); - } - } + lcd->backlight_on = devm_gpiod_get_optional(&spi->dev, + "BL_ON", GPIOD_OUT_LOW); + if (IS_ERR(lcd->backlight_on)) + return PTR_ERR(lcd->backlight_on); + + lcd->backlight_cont = devm_gpiod_get_optional(&spi->dev, "BL_CONT", + GPIOD_OUT_LOW); + if (IS_ERR(lcd->backlight_cont)) + return PTR_ERR(lcd->backlight_cont); + return 0; } diff --git a/include/linux/spi/corgi_lcd.h b/include/linux/spi/corgi_lcd.h index edf4beccdadb..0b857616919c 100644 --- a/include/linux/spi/corgi_lcd.h +++ b/include/linux/spi/corgi_lcd.h @@ -11,9 +11,6 @@ struct corgi_lcd_platform_data { int default_intensity; int limit_mask; - int gpio_backlight_on; /* -1 if n/a */ - int gpio_backlight_cont; /* -1 if n/a */ - void (*notify)(int intensity); void (*kick_battery)(void); };