diff options
author | Alexander Shiyan <shc_work@mail.ru> | 2013-12-21 11:08:00 (GMT) |
---|---|---|
committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-02-11 13:10:17 (GMT) |
commit | 9fe21fdc5f3d3aa7d6e78ad25668e234330b6974 (patch) | |
tree | 79de7551ed227b4381bdb518e787c8fd0e9cf85f | |
parent | e62cabb5e9949bd51f68832b5ec9e18fcd323e20 (diff) | |
download | linux-9fe21fdc5f3d3aa7d6e78ad25668e234330b6974.tar.xz |
video: imxfb: Use regulator API with LCD class for powering
This patch replaces custom lcd_power() callback with
regulator API over LCD class.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
-rw-r--r-- | Documentation/devicetree/bindings/video/fsl,imx-fb.txt | 1 | ||||
-rw-r--r-- | arch/arm/mach-imx/mach-mx27ads.c | 55 | ||||
-rw-r--r-- | drivers/video/imxfb.c | 71 | ||||
-rw-r--r-- | include/linux/platform_data/video-imxfb.h | 1 |
4 files changed, 114 insertions, 14 deletions
diff --git a/Documentation/devicetree/bindings/video/fsl,imx-fb.txt b/Documentation/devicetree/bindings/video/fsl,imx-fb.txt index 46da08d..e6b1ee9 100644 --- a/Documentation/devicetree/bindings/video/fsl,imx-fb.txt +++ b/Documentation/devicetree/bindings/video/fsl,imx-fb.txt @@ -15,6 +15,7 @@ Required nodes: - fsl,pcr: LCDC PCR value Optional properties: +- lcd-supply: Regulator for LCD supply voltage. - fsl,dmacr: DMA Control Register value. This is optional. By default, the register is not modified as recommended by the datasheet. - fsl,lscr1: LCDC Sharp Configuration Register value. diff --git a/arch/arm/mach-imx/mach-mx27ads.c b/arch/arm/mach-imx/mach-mx27ads.c index 9821b824..a7a4a9c 100644 --- a/arch/arm/mach-imx/mach-mx27ads.c +++ b/arch/arm/mach-imx/mach-mx27ads.c @@ -21,6 +21,10 @@ #include <linux/mtd/physmap.h> #include <linux/i2c.h> #include <linux/irq.h> + +#include <linux/regulator/fixed.h> +#include <linux/regulator/machine.h> + #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/time.h> @@ -195,14 +199,58 @@ static const struct imxi2c_platform_data mx27ads_i2c1_data __initconst = { static struct i2c_board_info mx27ads_i2c_devices[] = { }; -void lcd_power(int on) +static void vgpio_set(struct gpio_chip *chip, unsigned offset, int value) { - if (on) + if (value) __raw_writew(PBC_BCTRL1_LCDON, PBC_BCTRL1_SET_REG); else __raw_writew(PBC_BCTRL1_LCDON, PBC_BCTRL1_CLEAR_REG); } +static int vgpio_dir_out(struct gpio_chip *chip, unsigned offset, int value) +{ + return 0; +} + +#define MX27ADS_LCD_GPIO (6 * 32) + +static struct regulator_consumer_supply mx27ads_lcd_regulator_consumer = + REGULATOR_SUPPLY("lcd", "imx-fb.0"); + +static struct regulator_init_data mx27ads_lcd_regulator_init_data = { + .constraints = { + .valid_ops_mask = REGULATOR_CHANGE_STATUS, +}, + .consumer_supplies = &mx27ads_lcd_regulator_consumer, + .num_consumer_supplies = 1, +}; + +static struct fixed_voltage_config mx27ads_lcd_regulator_pdata = { + .supply_name = "LCD", + .microvolts = 3300000, + .gpio = MX27ADS_LCD_GPIO, + .init_data = &mx27ads_lcd_regulator_init_data, +}; + +static void __init mx27ads_regulator_init(void) +{ + struct gpio_chip *vchip; + + vchip = kzalloc(sizeof(*vchip), GFP_KERNEL); + vchip->owner = THIS_MODULE; + vchip->label = "LCD"; + vchip->base = MX27ADS_LCD_GPIO; + vchip->ngpio = 1; + vchip->direction_output = vgpio_dir_out; + vchip->set = vgpio_set; + gpiochip_add(vchip); + + platform_device_register_data(&platform_bus, "reg-fixed-voltage", + PLATFORM_DEVID_AUTO, + &mx27ads_lcd_regulator_pdata, + sizeof(mx27ads_lcd_regulator_pdata)); +} + static struct imx_fb_videomode mx27ads_modes[] = { { .mode = { @@ -239,8 +287,6 @@ static const struct imx_fb_platform_data mx27ads_fb_data __initconst = { .pwmr = 0x00A903FF, .lscr1 = 0x00120300, .dmacr = 0x00020010, - - .lcd_power = lcd_power, }; static int mx27ads_sdhc1_init(struct device *dev, irq_handler_t detect_irq, @@ -304,6 +350,7 @@ static void __init mx27ads_board_init(void) i2c_register_board_info(1, mx27ads_i2c_devices, ARRAY_SIZE(mx27ads_i2c_devices)); imx27_add_imx_i2c(1, &mx27ads_i2c1_data); + mx27ads_regulator_init(); imx27_add_imx_fb(&mx27ads_fb_data); imx27_add_mxc_mmc(0, &sdhc1_pdata); imx27_add_mxc_mmc(1, &sdhc2_pdata); diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c index 44ee678..e50b67f 100644 --- a/drivers/video/imxfb.c +++ b/drivers/video/imxfb.c @@ -30,10 +30,13 @@ #include <linux/platform_device.h> #include <linux/dma-mapping.h> #include <linux/io.h> +#include <linux/lcd.h> #include <linux/math64.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/regulator/consumer.h> + #include <video/of_display_timing.h> #include <video/of_videomode.h> #include <video/videomode.h> @@ -177,8 +180,9 @@ struct imxfb_info { struct backlight_device *bl; #endif - void (*lcd_power)(int); void (*backlight_power)(int); + + struct regulator *lcd_pwr; }; static struct platform_device_id imxfb_devtype[] = { @@ -591,8 +595,6 @@ static void imxfb_enable_controller(struct imxfb_info *fbi) if (fbi->backlight_power) fbi->backlight_power(1); - if (fbi->lcd_power) - fbi->lcd_power(1); } static void imxfb_disable_controller(struct imxfb_info *fbi) @@ -604,8 +606,6 @@ static void imxfb_disable_controller(struct imxfb_info *fbi) if (fbi->backlight_power) fbi->backlight_power(0); - if (fbi->lcd_power) - fbi->lcd_power(0); clk_disable_unprepare(fbi->clk_per); clk_disable_unprepare(fbi->clk_ipg); @@ -796,7 +796,6 @@ static int imxfb_init_fbinfo(struct platform_device *pdev) fbi->lscr1 = pdata->lscr1; fbi->dmacr = pdata->dmacr; fbi->pwmr = pdata->pwmr; - fbi->lcd_power = pdata->lcd_power; fbi->backlight_power = pdata->backlight_power; } else { np = pdev->dev.of_node; @@ -810,9 +809,6 @@ static int imxfb_init_fbinfo(struct platform_device *pdev) of_property_read_u32(np, "fsl,dmacr", &fbi->dmacr); - /* These two function pointers could be used by some specific - * platforms. */ - fbi->lcd_power = NULL; fbi->backlight_power = NULL; } @@ -856,9 +852,50 @@ static int imxfb_of_read_mode(struct device *dev, struct device_node *np, return 0; } +static int imxfb_lcd_check_fb(struct lcd_device *lcddev, struct fb_info *fi) +{ + struct imxfb_info *fbi = dev_get_drvdata(&lcddev->dev); + + if (!fi || fi->par == fbi) + return 1; + + return 0; +} + +static int imxfb_lcd_get_power(struct lcd_device *lcddev) +{ + struct imxfb_info *fbi = dev_get_drvdata(&lcddev->dev); + + if (!IS_ERR(fbi->lcd_pwr)) + return regulator_is_enabled(fbi->lcd_pwr); + + return 1; +} + +static int imxfb_lcd_set_power(struct lcd_device *lcddev, int power) +{ + struct imxfb_info *fbi = dev_get_drvdata(&lcddev->dev); + + if (!IS_ERR(fbi->lcd_pwr)) { + if (power) + return regulator_enable(fbi->lcd_pwr); + else + return regulator_disable(fbi->lcd_pwr); + } + + return 0; +} + +static struct lcd_ops imxfb_lcd_ops = { + .check_fb = imxfb_lcd_check_fb, + .get_power = imxfb_lcd_get_power, + .set_power = imxfb_lcd_set_power, +}; + static int imxfb_probe(struct platform_device *pdev) { struct imxfb_info *fbi; + struct lcd_device *lcd; struct fb_info *info; struct imx_fb_platform_data *pdata; struct resource *res; @@ -1020,6 +1057,19 @@ static int imxfb_probe(struct platform_device *pdev) goto failed_register; } + fbi->lcd_pwr = devm_regulator_get(&pdev->dev, "lcd"); + if (IS_ERR(fbi->lcd_pwr) && (PTR_ERR(fbi->lcd_pwr) == -EPROBE_DEFER)) { + ret = -EPROBE_DEFER; + goto failed_lcd; + } + + lcd = devm_lcd_device_register(&pdev->dev, "imxfb-lcd", &pdev->dev, fbi, + &imxfb_lcd_ops); + if (IS_ERR(lcd)) { + ret = PTR_ERR(lcd); + goto failed_lcd; + } + imxfb_enable_controller(fbi); fbi->pdev = pdev; #ifdef PWMR_BACKLIGHT_AVAILABLE @@ -1028,6 +1078,9 @@ static int imxfb_probe(struct platform_device *pdev) return 0; +failed_lcd: + unregister_framebuffer(info); + failed_register: fb_dealloc_cmap(&info->cmap); failed_cmap: diff --git a/include/linux/platform_data/video-imxfb.h b/include/linux/platform_data/video-imxfb.h index 9de8f06..8902706 100644 --- a/include/linux/platform_data/video-imxfb.h +++ b/include/linux/platform_data/video-imxfb.h @@ -76,7 +76,6 @@ struct imx_fb_platform_data { int (*init)(struct platform_device *); void (*exit)(struct platform_device *); - void (*lcd_power)(int); void (*backlight_power)(int); }; |