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authorKim, Milo <Milo.Kim@ti.com>2012-03-23 15:02:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-23 16:58:34 -0700
commit3b49aacd0e56d5bf1b511f6554f17cd65eb8da64 (patch)
tree22da84acf260e760e68006afa03346342a518f84
parent5ae4e8a77dc82afcfe8460168ec0b94f4b79a54a (diff)
downloadlinux-linaro-stable-3b49aacd0e56d5bf1b511f6554f17cd65eb8da64.tar.gz
drivers/leds/leds-lp5521.c: add 'update_config' in the lp5521_platform_data
The value of CONFIG register(Addr 08h) is configurable. For supporting this feature, update_config is added in the platform data. If 'update_config' is not defined, the default value is 'LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT'. To define CONFIG register in the platform data, the bit definitions were mo= ved to the header file. Documentation updated : description about 'update_config' and example. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Arun MURTHY <arun.murthy@stericsson.com> Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/leds/leds-lp5521.txt19
-rw-r--r--drivers/leds/leds-lp5521.c19
-rw-r--r--include/linux/leds-lp5521.h13
3 files changed, 36 insertions, 15 deletions
diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt
index f48ab757d120..e3c66c64591d 100644
--- a/Documentation/leds/leds-lp5521.txt
+++ b/Documentation/leds/leds-lp5521.txt
@@ -92,3 +92,22 @@ static struct lp5521_platform_data lp5521_platform_data = {
If the current is set to 0 in the platform data, that channel is
disabled and it is not visible in the sysfs.
+
+The 'update_config' : CONFIG register (ADDR 08h)
+This value is platform-specific data.
+If update_config is not defined, the CONFIG register is set with
+'LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT'.
+(Enable auto-powersave, set charge pump to auto, red to battery)
+
+example of update_config :
+
+#define LP5521_CONFIGS (LP5521_PWM_HF | LP5521_PWRSAVE_EN | \
+ LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT | \
+ LP5521_CLK_INT)
+
+static struct lp5521_platform_data lp5521_pdata = {
+ .led_config = lp5521_led_config,
+ .num_channels = ARRAY_SIZE(lp5521_led_config),
+ .clock_mode = LP5521_CLOCK_INT,
+ .update_config = LP5521_CONFIGS,
+};
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 59feecdfe3a8..9682ece16011 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -82,18 +82,6 @@
#define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */
#define LP5521_EXEC_RUN 0x2A
-/* Bits in CONFIG register */
-#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */
-#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */
-#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */
-#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */
-#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */
-#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */
-#define LP5521_R_TO_BATT 4 /* R out: 0 = CP, 1 = Vbat */
-#define LP5521_CLK_SRC_EXT 0 /* Ext-clk source (CLK_32K) */
-#define LP5521_CLK_INT 1 /* Internal clock */
-#define LP5521_CLK_AUTO 2 /* Automatic clock selection */
-
/* Status */
#define LP5521_EXT_CLK_USED 0x08
@@ -241,15 +229,16 @@ static int lp5521_configure(struct i2c_client *client)
{
struct lp5521_chip *chip = i2c_get_clientdata(client);
int ret;
+ u8 cfg;
lp5521_init_engine(chip);
/* Set all PWMs to direct control mode */
ret = lp5521_write(client, LP5521_REG_OP_MODE, 0x3F);
- /* Enable auto-powersave, set charge pump to auto, red to battery */
- ret |= lp5521_write(client, LP5521_REG_CONFIG,
- LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT);
+ cfg = chip->pdata->update_config ?
+ : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT);
+ ret |= lp5521_write(client, LP5521_REG_CONFIG, cfg);
/* Initialize all channels PWM to zero -> leds off */
ret |= lp5521_write(client, LP5521_REG_R_PWM, 0);
diff --git a/include/linux/leds-lp5521.h b/include/linux/leds-lp5521.h
index e675b8d4c7bf..e9ab583cac36 100644
--- a/include/linux/leds-lp5521.h
+++ b/include/linux/leds-lp5521.h
@@ -36,6 +36,18 @@ struct lp5521_led_config {
#define LP5521_CLOCK_INT 1
#define LP5521_CLOCK_EXT 2
+/* Bits in CONFIG register */
+#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */
+#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */
+#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */
+#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */
+#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */
+#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */
+#define LP5521_R_TO_BATT 4 /* R out: 0 = CP, 1 = Vbat */
+#define LP5521_CLK_SRC_EXT 0 /* Ext-clk source (CLK_32K) */
+#define LP5521_CLK_INT 1 /* Internal clock */
+#define LP5521_CLK_AUTO 2 /* Automatic clock selection */
+
struct lp5521_platform_data {
struct lp5521_led_config *led_config;
u8 num_channels;
@@ -44,6 +56,7 @@ struct lp5521_platform_data {
void (*release_resources)(void);
void (*enable)(bool state);
const char *label;
+ u8 update_config;
};
#endif /* __LINUX_LP5521_H */