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mfd: Use SI-units for the lm3533 max-current interface

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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>
This commit is contained in:
Johan Hovold 2012-05-10 19:18:29 +02:00 committed by Samuel Ortiz
parent 7af5e87dc5
commit 6fa4b9d802
2 changed files with 33 additions and 17 deletions
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43
drivers/mfd/lm3533-ctrlbank.c
View File

@ -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) \
{ \
@ -101,19 +129,6 @@ EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
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:
*

7
include/linux/mfd/lm3533.h
View File

@ -47,15 +47,15 @@ struct lm3533_als_platform_data {
struct lm3533_bl_platform_data {
char *name;
u16 max_current; /* 5000 - 29800 uA (800 uA step) */
u8 default_brightness; /* 0 - 255 */
u8 max_current; /* 0 - 31 */
u8 pwm; /* 0 - 0x3f */
};
struct lm3533_led_platform_data {
char *name;
const char *default_trigger;
u8 max_current; /* 0 - 31 */
u16 max_current; /* 5000 - 29800 uA (800 uA step) */
u8 pwm; /* 0 - 0x3f */
};
@ -91,7 +91,8 @@ extern int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb);
extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val);
extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val);
extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u8 val);
extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb,
u16 imax);
extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val);
extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val);