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[93.181.165.181]) by smtp.gmail.com with ESMTPSA id n24-v6sm350827ljc.7.2018.07.17.16.15.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 17 Jul 2018 16:15:05 -0700 (PDT) From: Janusz Krzysztofik To: Tony Lindgren Cc: Aaro Koskinen , Boris Brezillon , Miquel Raynal , Richard Weinberger , David Woodhouse , Brian Norris , Marek Vasut , Shreeya Patel , Arvind Yadav , Bartlomiej Zolnierkiewicz , Gregory CLEMENT , Krzysztof Halasa , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, linux-mtd@lists.infradead.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Andy Shevchenko , Tomi Valkeinen , Janusz Krzysztofik Subject: [PATCH v2 1/3 v2] video: fbdev: omapfb: lcd_ams_delta: use GPIO lookup table Date: Wed, 18 Jul 2018 01:14:46 +0200 Message-Id: <20180717231448.14958-2-jmkrzyszt@gmail.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20180717231448.14958-1-jmkrzyszt@gmail.com> References: <20180518210954.29044-1-jmkrzyszt@gmail.com> <20180717231448.14958-1-jmkrzyszt@gmail.com> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now as Amstrad Delta board - the only user of this driver - provides GPIO lookup tables, switch from GPIO numbers to GPIO descriptors and use the table to locate required GPIO pins. Declare static variables for storing GPIO descriptors and replace gpio_ function calls with their gpiod_ equivalents. Move GPIO lookup to the driver probe function so device initialization can be deferred instead of aborted if a GPIO pin is not yet available. Pin naming used by the driver should be followed while respective GPIO lookup table is initialized by a board init code. Cc: Bartlomiej Zolnierkiewicz Signed-off-by: Janusz Krzysztofik --- Changelog: v2: Remove problematic error code conversion no longer needed if used on top of commit d08605a64e67 ("ARM: OMAP1: ams-delta: move late devices back to init_machine") already in linux-omap and commit 8853daf3b4ac ("gpiolib: Defer on non-DT find_chip_by_name() failure") already in linux-next Dependency on commit 8853daf3b4ac ("gpiolib: Defer on non-DT find_chip_by_name() failure") is not critical for clean build or run, it only prevents from unexpected future changes to driver initialization order durin device_initall. drivers/video/fbdev/omap/lcd_ams_delta.c | 55 +++++++++++++------------------- 1 file changed, 22 insertions(+), 33 deletions(-) diff --git a/drivers/video/fbdev/omap/lcd_ams_delta.c b/drivers/video/fbdev/omap/lcd_ams_delta.c index e8c748a0dfe2..cddbd00cbf9f 100644 --- a/drivers/video/fbdev/omap/lcd_ams_delta.c +++ b/drivers/video/fbdev/omap/lcd_ams_delta.c @@ -24,11 +24,10 @@ #include #include #include +#include #include -#include #include -#include #include "omapfb.h" @@ -41,6 +40,8 @@ /* LCD class device section */ static int ams_delta_lcd; +static struct gpio_desc *gpiod_vblen; +static struct gpio_desc *gpiod_ndisp; static int ams_delta_lcd_set_power(struct lcd_device *dev, int power) { @@ -99,41 +100,17 @@ static struct lcd_ops ams_delta_lcd_ops = { /* omapfb panel section */ -static const struct gpio _gpios[] = { - { - .gpio = AMS_DELTA_GPIO_PIN_LCD_VBLEN, - .flags = GPIOF_OUT_INIT_LOW, - .label = "lcd_vblen", - }, - { - .gpio = AMS_DELTA_GPIO_PIN_LCD_NDISP, - .flags = GPIOF_OUT_INIT_LOW, - .label = "lcd_ndisp", - }, -}; - -static int ams_delta_panel_init(struct lcd_panel *panel, - struct omapfb_device *fbdev) -{ - return gpio_request_array(_gpios, ARRAY_SIZE(_gpios)); -} - -static void ams_delta_panel_cleanup(struct lcd_panel *panel) -{ - gpio_free_array(_gpios, ARRAY_SIZE(_gpios)); -} - static int ams_delta_panel_enable(struct lcd_panel *panel) { - gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_NDISP, 1); - gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_VBLEN, 1); + gpiod_set_value(gpiod_ndisp, 1); + gpiod_set_value(gpiod_vblen, 1); return 0; } static void ams_delta_panel_disable(struct lcd_panel *panel) { - gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_VBLEN, 0); - gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_NDISP, 0); + gpiod_set_value(gpiod_vblen, 0); + gpiod_set_value(gpiod_ndisp, 0); } static struct lcd_panel ams_delta_panel = { @@ -154,8 +131,6 @@ static struct lcd_panel ams_delta_panel = { .pcd = 0, .acb = 37, - .init = ams_delta_panel_init, - .cleanup = ams_delta_panel_cleanup, .enable = ams_delta_panel_enable, .disable = ams_delta_panel_disable, }; @@ -166,9 +141,23 @@ static struct lcd_panel ams_delta_panel = { static int ams_delta_panel_probe(struct platform_device *pdev) { struct lcd_device *lcd_device = NULL; -#ifdef CONFIG_LCD_CLASS_DEVICE int ret; + gpiod_vblen = devm_gpiod_get(&pdev->dev, "vblen", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_vblen)) { + ret = PTR_ERR(gpiod_vblen); + dev_err(&pdev->dev, "VBLEN GPIO request failed (%d)\n", ret); + return ret; + } + + gpiod_ndisp = devm_gpiod_get(&pdev->dev, "ndisp", GPIOD_OUT_LOW); + if (IS_ERR(gpiod_ndisp)) { + ret = PTR_ERR(gpiod_ndisp); + dev_err(&pdev->dev, "NDISP GPIO request failed (%d)\n", ret); + return ret; + } + +#ifdef CONFIG_LCD_CLASS_DEVICE lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL, &ams_delta_lcd_ops);