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| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2012-08-15 18:25:27 +0200 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2012-11-21 15:50:02 +0100 |
| commit | 37f4dd13505bab9f2bbd2f66a2c9375e959452eb (patch) | |
| tree | d592960f843688ea1095c36fc9556a53a68c6e13 /arch/arm/mach-shmobile/board-ag5evm.c | |
| parent | f70f4711df527b914486bf5381ec9a4911915c7d (diff) | |
| download | linux-37f4dd13505bab9f2bbd2f66a2c9375e959452eb.tar.bz2 | |
ARM: mach-shmobile: ag5evm: Use the backlight API for brightness control
Don't hook up brightness control in the display on/off operations, use
the backlight API instead.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'arch/arm/mach-shmobile/board-ag5evm.c')
| -rw-r--r-- | arch/arm/mach-shmobile/board-ag5evm.c | 45 |
1 files changed, 29 insertions, 16 deletions
diff --git a/arch/arm/mach-shmobile/board-ag5evm.c b/arch/arm/mach-shmobile/board-ag5evm.c index d787979a5310..032d10817e79 100644 --- a/arch/arm/mach-shmobile/board-ag5evm.c +++ b/arch/arm/mach-shmobile/board-ag5evm.c @@ -295,28 +295,38 @@ static unsigned char lcd_backlight_seq[3][2] = { { 0x03, 0x01 }, }; -static void lcd_backlight_on(void) +static int lcd_backlight_set_brightness(int brightness) { - struct i2c_adapter *a; + struct i2c_adapter *adap; struct i2c_msg msg; - int k; + unsigned int i; + int ret; + + if (brightness == 0) { + /* Reset the chip */ + gpio_set_value(GPIO_PORT235, 0); + mdelay(24); + gpio_set_value(GPIO_PORT235, 1); + return 0; + } + + adap = i2c_get_adapter(1); + if (adap == NULL) + return -ENODEV; - a = i2c_get_adapter(1); - for (k = 0; a && k < 3; k++) { + for (i = 0; i < ARRAY_SIZE(lcd_backlight_seq); i++) { msg.addr = 0x6d; - msg.buf = &lcd_backlight_seq[k][0]; + msg.buf = &lcd_backlight_seq[i][0]; msg.len = 2; msg.flags = 0; - if (i2c_transfer(a, &msg, 1) != 1) + + ret = i2c_transfer(adap, &msg, 1); + if (ret < 0) break; } -} -static void lcd_backlight_reset(void) -{ - gpio_set_value(GPIO_PORT235, 0); - mdelay(24); - gpio_set_value(GPIO_PORT235, 1); + i2c_put_adapter(adap); + return ret < 0 ? ret : 0; } /* LCDC0 */ @@ -348,8 +358,11 @@ static struct sh_mobile_lcdc_info lcdc0_info = { .panel_cfg = { .width = 44, .height = 79, - .display_on = lcd_backlight_on, - .display_off = lcd_backlight_reset, + }, + .bl_info = { + .name = "sh_mobile_lcdc_bl", + .max_brightness = 1, + .set_brightness = lcd_backlight_set_brightness, }, .tx_dev = &mipidsi0_device, } @@ -622,7 +635,7 @@ static void __init ag5evm_init(void) /* LCD backlight controller */ gpio_request(GPIO_PORT235, NULL); /* RESET */ gpio_direction_output(GPIO_PORT235, 0); - lcd_backlight_reset(); + lcd_backlight_set_brightness(0); /* enable SDHI0 on CN15 [SD I/F] */ gpio_request(GPIO_FN_SDHIWP0, NULL); |