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path: root/drivers/leds/leds-lp5521.c
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Diffstat (limited to 'drivers/leds/leds-lp5521.c')
-rw-r--r--drivers/leds/leds-lp5521.c102
1 files changed, 101 insertions, 1 deletions
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 9682ece16011..007c7c921e7e 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -88,6 +88,9 @@
/* default R channel current register value */
#define LP5521_REG_R_CURR_DEFAULT 0xAF
+/* Pattern Mode */
+#define PATTERN_OFF 0
+
struct lp5521_engine {
int id;
u8 mode;
@@ -493,7 +496,7 @@ static ssize_t store_current(struct device *dev,
ssize_t ret;
unsigned long curr;
- if (strict_strtoul(buf, 0, &curr))
+ if (kstrtoul(buf, 0, &curr))
return -EINVAL;
if (curr > led->max_current)
@@ -525,6 +528,100 @@ static ssize_t lp5521_selftest(struct device *dev,
return sprintf(buf, "%s\n", ret ? "FAIL" : "OK");
}
+static void lp5521_clear_program_memory(struct i2c_client *cl)
+{
+ int i;
+ u8 rgb_mem[] = {
+ LP5521_REG_R_PROG_MEM,
+ LP5521_REG_G_PROG_MEM,
+ LP5521_REG_B_PROG_MEM,
+ };
+
+ for (i = 0; i < ARRAY_SIZE(rgb_mem); i++) {
+ lp5521_write(cl, rgb_mem[i], 0);
+ lp5521_write(cl, rgb_mem[i] + 1, 0);
+ }
+}
+
+static void lp5521_write_program_memory(struct i2c_client *cl,
+ u8 base, u8 *rgb, int size)
+{
+ int i;
+
+ if (!rgb || size <= 0)
+ return;
+
+ for (i = 0; i < size; i++)
+ lp5521_write(cl, base + i, *(rgb + i));
+
+ lp5521_write(cl, base + i, 0);
+ lp5521_write(cl, base + i + 1, 0);
+}
+
+static inline struct lp5521_led_pattern *lp5521_get_pattern
+ (struct lp5521_chip *chip, u8 offset)
+{
+ struct lp5521_led_pattern *ptn;
+ ptn = chip->pdata->patterns + (offset - 1);
+ return ptn;
+}
+
+static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip)
+{
+ struct lp5521_led_pattern *ptn;
+ struct i2c_client *cl = chip->client;
+ int num_patterns = chip->pdata->num_patterns;
+
+ if (mode > num_patterns || !(chip->pdata->patterns))
+ return;
+
+ if (mode == PATTERN_OFF) {
+ lp5521_write(cl, LP5521_REG_ENABLE,
+ LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM);
+ usleep_range(1000, 2000);
+ lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
+ } else {
+ ptn = lp5521_get_pattern(chip, mode);
+ if (!ptn)
+ return;
+
+ lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_LOAD);
+ usleep_range(1000, 2000);
+
+ lp5521_clear_program_memory(cl);
+
+ lp5521_write_program_memory(cl, LP5521_REG_R_PROG_MEM,
+ ptn->r, ptn->size_r);
+ lp5521_write_program_memory(cl, LP5521_REG_G_PROG_MEM,
+ ptn->g, ptn->size_g);
+ lp5521_write_program_memory(cl, LP5521_REG_B_PROG_MEM,
+ ptn->b, ptn->size_b);
+
+ lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_RUN);
+ usleep_range(1000, 2000);
+ lp5521_write(cl, LP5521_REG_ENABLE,
+ LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM |
+ LP5521_EXEC_RUN);
+ }
+}
+
+static ssize_t store_led_pattern(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp5521_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
+ unsigned long val;
+ int ret;
+
+ ret = strict_strtoul(buf, 16, &val);
+ if (ret)
+ return ret;
+
+ lp5521_run_led_pattern(val, chip);
+
+ return len;
+}
+
/* led class device attributes */
static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, show_current, store_current);
static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL);
@@ -550,6 +647,7 @@ static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load);
static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load);
static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load);
static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL);
+static DEVICE_ATTR(led_pattern, S_IWUSR, NULL, store_led_pattern);
static struct attribute *lp5521_attributes[] = {
&dev_attr_engine1_mode.attr,
@@ -559,6 +657,7 @@ static struct attribute *lp5521_attributes[] = {
&dev_attr_engine1_load.attr,
&dev_attr_engine2_load.attr,
&dev_attr_engine3_load.attr,
+ &dev_attr_led_pattern.attr,
NULL
};
@@ -761,6 +860,7 @@ static int __devexit lp5521_remove(struct i2c_client *client)
struct lp5521_chip *chip = i2c_get_clientdata(client);
int i;
+ lp5521_run_led_pattern(PATTERN_OFF, chip);
lp5521_unregister_sysfs(client);
for (i = 0; i < chip->num_leds; i++) {
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