ARM: i.MX: mx21ads: Use fixed voltage regulator for LCD power
Instead of using init() and exit() hooks from framebuffer driver to control power of LCD, introduce fixed voltage regulator for this purpose. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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cfdb7d564c
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@ -19,6 +19,8 @@
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#include <linux/mtd/physmap.h>
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#include <linux/basic_mmio_gpio.h>
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#include <linux/gpio.h>
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#include <linux/regulator/fixed.h>
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#include <linux/regulator/machine.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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@ -191,22 +193,32 @@ static struct platform_device mx21ads_mmgpio = {
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},
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};
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static int mx21ads_fb_init(struct platform_device *pdev)
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{
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int ret;
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static struct regulator_consumer_supply mx21ads_lcd_regulator_consumer =
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REGULATOR_SUPPLY("lcd", "imx-fb.0");
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ret = gpio_request(MX21ADS_IO_LCDON, "fb-lcdon");
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if (ret)
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return ret;
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static struct regulator_init_data mx21ads_lcd_regulator_init_data = {
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.constraints = {
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.valid_ops_mask = REGULATOR_CHANGE_STATUS,
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},
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.consumer_supplies = &mx21ads_lcd_regulator_consumer,
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.num_consumer_supplies = 1,
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};
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return gpio_direction_output(MX21ADS_IO_LCDON, 1);
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}
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static struct fixed_voltage_config mx21ads_lcd_regulator_pdata = {
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.supply_name = "LCD",
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.microvolts = 3300000,
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.gpio = MX21ADS_IO_LCDON,
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.enable_high = 1,
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.init_data = &mx21ads_lcd_regulator_init_data,
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};
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static void mx21ads_fb_exit(struct platform_device *pdev)
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{
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gpio_set_value(MX21ADS_IO_LCDON, 0);
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gpio_free(MX21ADS_IO_LCDON);
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}
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static struct platform_device mx21ads_lcd_regulator = {
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.name = "reg-fixed-voltage",
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.id = PLATFORM_DEVID_AUTO,
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.dev = {
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.platform_data = &mx21ads_lcd_regulator_pdata,
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},
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};
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/*
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* Connected is a portrait Sharp-QVGA display
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@ -239,9 +251,6 @@ static const struct imx_fb_platform_data mx21ads_fb_data __initconst = {
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.pwmr = 0x00a903ff,
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.lscr1 = 0x00120300,
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.dmacr = 0x00020008,
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.init = mx21ads_fb_init,
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.exit = mx21ads_fb_exit,
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};
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static int mx21ads_sdhc_get_ro(struct device *dev)
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@ -283,6 +292,7 @@ mx21ads_nand_board_info __initconst = {
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static struct platform_device *platform_devices[] __initdata = {
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&mx21ads_mmgpio,
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&mx21ads_lcd_regulator,
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&mx21ads_nor_mtd_device,
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};
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@ -296,12 +306,13 @@ static void __init mx21ads_board_init(void)
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imx21_add_imx_uart0(&uart_pdata_rts);
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imx21_add_imx_uart2(&uart_pdata_norts);
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imx21_add_imx_uart3(&uart_pdata_rts);
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imx21_add_imx_fb(&mx21ads_fb_data);
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imx21_add_mxc_mmc(0, &mx21ads_sdhc_pdata);
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imx21_add_mxc_nand(&mx21ads_nand_board_info);
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platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
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imx21_add_imx_fb(&mx21ads_fb_data);
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mx21ads_cs8900_resources[1].start =
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gpio_to_irq(MX21ADS_CS8900A_IRQ_GPIO);
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mx21ads_cs8900_resources[1].end =
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