diff options
| author | Johan Hovold <jhovold@gmail.com> | 2012-05-10 19:18:29 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-05-20 17:27:02 +0200 |
| commit | 6fa4b9d802610116adf4b89c2f9bd155829aafd3 (patch) | |
| tree | c03e8909ea06806fa2bf33b0f774d0ab168457a8 /drivers/mfd/lm3533-ctrlbank.c | |
| parent | 7af5e87dc5e6b6f413ba95b06e06ebf810687858 (diff) | |
mfd: Use SI-units for the lm3533 max-current interface
Use SI-units (uA) for max-current interface (5000 - 29800 uA).
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/lm3533-ctrlbank.c')
| -rw-r--r-- | drivers/mfd/lm3533-ctrlbank.c | 43 |
1 files changed, 29 insertions, 14 deletions
diff --git a/drivers/mfd/lm3533-ctrlbank.c b/drivers/mfd/lm3533-ctrlbank.c index adf4c1a542a9..a4cb7a5220a7 100644 --- a/drivers/mfd/lm3533-ctrlbank.c +++ b/drivers/mfd/lm3533-ctrlbank.c @@ -17,8 +17,11 @@ #include <linux/mfd/lm3533.h> +#define LM3533_MAX_CURRENT_MIN 5000 +#define LM3533_MAX_CURRENT_MAX 29800 +#define LM3533_MAX_CURRENT_STEP 800 + #define LM3533_BRIGHTNESS_MAX 255 -#define LM3533_MAX_CURRENT_MAX 31 #define LM3533_PWM_MAX 0x3f #define LM3533_REG_PWM_BASE 0x14 @@ -65,6 +68,31 @@ int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb) } EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable); +/* + * Full-scale current. + * + * imax 5000 - 29800 uA (800 uA step) + */ +int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax) +{ + u8 reg; + u8 val; + int ret; + + if (imax < LM3533_MAX_CURRENT_MIN || imax > LM3533_MAX_CURRENT_MAX) + return -EINVAL; + + val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP; + + reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE); + ret = lm3533_write(cb->lm3533, reg, val); + if (ret) + dev_err(cb->dev, "failed to set max current\n"); + + return ret; +} +EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current); + #define lm3533_ctrlbank_set(_name, _NAME) \ int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val) \ { \ @@ -102,19 +130,6 @@ lm3533_ctrlbank_set(brightness, BRIGHTNESS); lm3533_ctrlbank_get(brightness, BRIGHTNESS); /* - * Full scale current. - * - * Imax = 5 + val * 0.8 mA, e.g.: - * - * 0 - 5 mA - * ... - * 19 - 20.2 mA (default) - * ... - * 31 - 29.8 mA - */ -lm3533_ctrlbank_set(max_current, MAX_CURRENT); - -/* * PWM-input control mask: * * bit 5 - PWM-input enabled in Zone 4 |