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, 13 insertions, 0 deletions

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 */