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>

1 files changed, 4 insertions, 15 deletions

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);