From 5812c13a4e636da4bd7f7cabbbbc59d9dbf3c86c Mon Sep 17 00:00:00 2001 From: Milo Kim Date: Tue, 12 Nov 2013 15:08:57 -0800 Subject: backlight: lp855x_bl: support new LP8555 device LP8555 is one of the LP855x family devices. This device needs pre_init_device() and post_init_device() driver structure. It's same as LP8557, so the device configuration code is shared with LP8557. Backlight outputs are generated from dual DC-DC boost converters. It's configurable EPROM settings which are defined in the platform data. Driver documentation and device tree bindings are updated. Signed-off-by: Milo Kim Signed-off-by: Jingoo Han Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/backlight/Kconfig | 4 ++-- drivers/video/backlight/lp855x_bl.c | 17 +++++++++++++++-- 2 files changed, 17 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index d4a7a351d67c..a65dd063ecad 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -388,8 +388,8 @@ config BACKLIGHT_LP855X tristate "Backlight driver for TI LP855X" depends on BACKLIGHT_CLASS_DEVICE && I2C help - This supports TI LP8550, LP8551, LP8552, LP8553, LP8556 and LP8557 - backlight driver. + This supports TI LP8550, LP8551, LP8552, LP8553, LP8555, LP8556 and + LP8557 backlight driver. config BACKLIGHT_LP8788 tristate "Backlight driver for TI LP8788 MFD" diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c index c0b41f13bd4a..c952175d4113 100644 --- a/drivers/video/backlight/lp855x_bl.c +++ b/drivers/video/backlight/lp855x_bl.c @@ -26,13 +26,15 @@ #define LP8556_EPROM_START 0xA0 #define LP8556_EPROM_END 0xAF -/* LP8557 Registers */ +/* LP8555/7 Registers */ #define LP8557_BL_CMD 0x00 #define LP8557_BL_MASK 0x01 #define LP8557_BL_ON 0x01 #define LP8557_BL_OFF 0x00 #define LP8557_BRIGHTNESS_CTRL 0x04 #define LP8557_CONFIG 0x10 +#define LP8555_EPROM_START 0x10 +#define LP8555_EPROM_END 0x7A #define LP8557_EPROM_START 0x10 #define LP8557_EPROM_END 0x1E @@ -111,6 +113,10 @@ static bool lp855x_is_valid_rom_area(struct lp855x *lp, u8 addr) start = LP8556_EPROM_START; end = LP8556_EPROM_END; break; + case LP8555: + start = LP8555_EPROM_START; + end = LP8555_EPROM_END; + break; case LP8557: start = LP8557_EPROM_START; end = LP8557_EPROM_END; @@ -165,9 +171,14 @@ static int lp855x_configure(struct lp855x *lp) struct lp855x_platform_data *pd = lp->pdata; switch (lp->chip_id) { - case LP8550 ... LP8556: + case LP8550: + case LP8551: + case LP8552: + case LP8553: + case LP8556: lp->cfg = &lp855x_dev_cfg; break; + case LP8555: case LP8557: lp->cfg = &lp8557_dev_cfg; break; @@ -470,6 +481,7 @@ static const struct of_device_id lp855x_dt_ids[] = { { .compatible = "ti,lp8551", }, { .compatible = "ti,lp8552", }, { .compatible = "ti,lp8553", }, + { .compatible = "ti,lp8555", }, { .compatible = "ti,lp8556", }, { .compatible = "ti,lp8557", }, { } @@ -481,6 +493,7 @@ static const struct i2c_device_id lp855x_ids[] = { {"lp8551", LP8551}, {"lp8552", LP8552}, {"lp8553", LP8553}, + {"lp8555", LP8555}, {"lp8556", LP8556}, {"lp8557", LP8557}, { } -- cgit v1.2.3