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Message-ID: <B567DBAB974C0544994013492B949F8E3812CD3807@EXMAIL03.scwf.nsc.com>
Date: Sat, 21 Jan 2012 10:09:31 -0800
From: "Kim, Milo" <Milo.Kim@...com>
To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"rpurdie@...ys.net" <rpurdie@...ys.net>
Subject: [PATCH 2/4] leds-lp5521: 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 moved
to the header file.
Documentation updated : description about 'update_config' and example.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@...com>
---
Documentation/leds/leds-lp5521.txt | 19 +++++++++++++++++++
drivers/leds/leds-lp5521.c | 19 ++++---------------
include/linux/leds-lp5521.h | 13 +++++++++++++
3 files changed, 36 insertions(+), 15 deletions(-)
diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt
index f48ab75..e3c66c6 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 c0e7c10..4fa792d 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
@@ -238,15 +226,16 @@ 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 e675b8d..e9ab583 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 */
--
1.7.4.1
Best Regards,
Milo (Woogyom) Kim
Texas Instruments Incorporated
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