From 0556dc340e5159cdff925a5ab7f3a72f49745661 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 31 Oct 2011 17:11:48 -0700 Subject: [PATCH] backlight: fix broken regulator API usage in l4f00242t03 The regulator support in the l4f00242t03 is very non-idiomatic. Rather than requesting the regulators based on the device name and the supply names used by the device the driver requires boards to pass system specific supply names around through platform data. The driver also conditionally requests the regulators based on this platform data, adding unneeded conditional code to the driver. Fix this by removing the platform data and converting to the standard idiom, also updating all in tree users of the driver. As no datasheet appears to be available for the LCD I'm guessing the names for the supplies based on the existing users and I've no ability to do anything more than compile test. The use of regulator_set_voltage() in the driver is also problematic, since fixed voltages are required the expectation would be that the voltages would be fixed in the constraints set by the machines rather than manually configured by the driver, but is less problematic. Signed-off-by: Mark Brown Tested-by: Fabio Estevam Cc: Richard Purdie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/arm/mach-imx/mach-mx27_3ds.c | 6 +-- arch/arm/mach-imx/mach-mx31_3ds.c | 6 +-- drivers/video/backlight/l4f00242t03.c | 57 ++++++++++----------------- include/linux/spi/l4f00242t03.h | 2 - 4 files changed, 24 insertions(+), 47 deletions(-) diff --git a/arch/arm/mach-imx/mach-mx27_3ds.c b/arch/arm/mach-imx/mach-mx27_3ds.c index 2eafbac2c763..377230497dcc 100644 --- a/arch/arm/mach-imx/mach-mx27_3ds.c +++ b/arch/arm/mach-imx/mach-mx27_3ds.c @@ -241,7 +241,7 @@ static struct regulator_init_data gpo_init = { }; static struct regulator_consumer_supply vmmc1_consumers[] = { - REGULATOR_SUPPLY("lcd_2v8", NULL), + REGULATOR_SUPPLY("vcore", "spi0.0"), }; static struct regulator_init_data vmmc1_init = { @@ -257,7 +257,7 @@ static struct regulator_init_data vmmc1_init = { }; static struct regulator_consumer_supply vgen_consumers[] = { - REGULATOR_SUPPLY("vdd_lcdio", NULL), + REGULATOR_SUPPLY("vdd", "spi0.0"), }; static struct regulator_init_data vgen_init = { @@ -348,8 +348,6 @@ static const struct imx_fb_platform_data mx27_3ds_fb_data __initconst = { static struct l4f00242t03_pdata mx27_3ds_lcd_pdata = { .reset_gpio = LCD_RESET, .data_enable_gpio = LCD_ENABLE, - .core_supply = "lcd_2v8", - .io_supply = "vdd_lcdio", }; static struct spi_board_info mx27_3ds_spi_devs[] __initdata = { diff --git a/arch/arm/mach-imx/mach-mx31_3ds.c b/arch/arm/mach-imx/mach-mx31_3ds.c index 589066fb3316..6484db525bd7 100644 --- a/arch/arm/mach-imx/mach-mx31_3ds.c +++ b/arch/arm/mach-imx/mach-mx31_3ds.c @@ -285,8 +285,6 @@ static struct mx3fb_platform_data mx3fb_pdata __initdata = { static struct l4f00242t03_pdata mx31_3ds_l4f00242t03_pdata = { .reset_gpio = IOMUX_TO_GPIO(MX31_PIN_LCS1), .data_enable_gpio = IOMUX_TO_GPIO(MX31_PIN_SER_RS), - .core_supply = "lcd_2v8", - .io_supply = "vdd_lcdio", }; /* @@ -411,7 +409,7 @@ static struct regulator_init_data vmmc2_init = { }; static struct regulator_consumer_supply vmmc1_consumers[] = { - REGULATOR_SUPPLY("lcd_2v8", NULL), + REGULATOR_SUPPLY("vcore", "spi0.0"), REGULATOR_SUPPLY("cmos_2v8", "soc-camera-pdrv.0"), }; @@ -428,7 +426,7 @@ static struct regulator_init_data vmmc1_init = { }; static struct regulator_consumer_supply vgen_consumers[] = { - REGULATOR_SUPPLY("vdd_lcdio", NULL), + REGULATOR_SUPPLY("vdd", "spi0.0"), }; static struct regulator_init_data vgen_init = { diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c index 98ad3e5f7c85..77ec70bcb303 100644 --- a/drivers/video/backlight/l4f00242t03.c +++ b/drivers/video/backlight/l4f00242t03.c @@ -52,15 +52,11 @@ static void l4f00242t03_lcd_init(struct spi_device *spi) dev_dbg(&spi->dev, "initializing LCD\n"); - if (priv->io_reg) { - regulator_set_voltage(priv->io_reg, 1800000, 1800000); - regulator_enable(priv->io_reg); - } + regulator_set_voltage(priv->io_reg, 1800000, 1800000); + regulator_enable(priv->io_reg); - if (priv->core_reg) { - regulator_set_voltage(priv->core_reg, 2800000, 2800000); - regulator_enable(priv->core_reg); - } + regulator_set_voltage(priv->core_reg, 2800000, 2800000); + regulator_enable(priv->core_reg); l4f00242t03_reset(pdata->reset_gpio); @@ -78,11 +74,8 @@ static void l4f00242t03_lcd_powerdown(struct spi_device *spi) gpio_set_value(pdata->data_enable_gpio, 0); - if (priv->io_reg) - regulator_disable(priv->io_reg); - - if (priv->core_reg) - regulator_disable(priv->core_reg); + regulator_disable(priv->io_reg); + regulator_disable(priv->core_reg); } static int l4f00242t03_lcd_power_get(struct lcd_device *ld) @@ -201,24 +194,18 @@ static int __devinit l4f00242t03_probe(struct spi_device *spi) if (ret) goto err3; - if (pdata->io_supply) { - priv->io_reg = regulator_get(NULL, pdata->io_supply); - - if (IS_ERR(priv->io_reg)) { - pr_err("%s: Unable to get the IO regulator\n", - __func__); - goto err3; - } + priv->io_reg = regulator_get(&spi->dev, "vdd"); + if (IS_ERR(priv->io_reg)) { + dev_err(&spi->dev, "%s: Unable to get the IO regulator\n", + __func__); + goto err3; } - if (pdata->core_supply) { - priv->core_reg = regulator_get(NULL, pdata->core_supply); - - if (IS_ERR(priv->core_reg)) { - pr_err("%s: Unable to get the core regulator\n", - __func__); - goto err4; - } + priv->core_reg = regulator_get(&spi->dev, "vcore"); + if (IS_ERR(priv->core_reg)) { + dev_err(&spi->dev, "%s: Unable to get the core regulator\n", + __func__); + goto err4; } priv->ld = lcd_device_register("l4f00242t03", @@ -238,11 +225,9 @@ static int __devinit l4f00242t03_probe(struct spi_device *spi) return 0; err5: - if (priv->core_reg) - regulator_put(priv->core_reg); + regulator_put(priv->core_reg); err4: - if (priv->io_reg) - regulator_put(priv->io_reg); + regulator_put(priv->io_reg); err3: gpio_free(pdata->data_enable_gpio); err2: @@ -266,10 +251,8 @@ static int __devexit l4f00242t03_remove(struct spi_device *spi) gpio_free(pdata->data_enable_gpio); gpio_free(pdata->reset_gpio); - if (priv->io_reg) - regulator_put(priv->io_reg); - if (priv->core_reg) - regulator_put(priv->core_reg); + regulator_put(priv->io_reg); + regulator_put(priv->core_reg); kfree(priv); diff --git a/include/linux/spi/l4f00242t03.h b/include/linux/spi/l4f00242t03.h index aee1dbda4edc..bc8677c8eba9 100644 --- a/include/linux/spi/l4f00242t03.h +++ b/include/linux/spi/l4f00242t03.h @@ -24,8 +24,6 @@ struct l4f00242t03_pdata { unsigned int reset_gpio; unsigned int data_enable_gpio; - const char *io_supply; /* will be set to 1.8 V */ - const char *core_supply; /* will be set to 2.8 V */ }; #endif /* _INCLUDE_LINUX_SPI_L4F00242T03_H_ */ -- 2.39.2