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mfd: lm3533: Expand control-bank accessors 

Expand the control-bank accessors that were implemented using macros.
This allows the definitions of these exported functions to be found more
easily and specifically avoids a W=1 compiler warning due to the
redundant brightness sanity check:

drivers/mfd/lm3533-ctrlbank.c: In function 'lm3533_ctrlbank_set_brightness':
drivers/mfd/lm3533-ctrlbank.c:98:10: warning: comparison is always false due to limited range of data type [-Wtype-limits]
   98 |  if (val > LM3533_##_NAME##_MAX)     \
      |          ^
drivers/mfd/lm3533-ctrlbank.c:125:1: note: in expansion of macro 'lm3533_ctrlbank_set'
  125 | lm3533_ctrlbank_set(brightness, BRIGHTNESS);
      | ^~~~~~~~~~~~~~~~~~~

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Johan Hovold 2020-06-30 10:39:48 +02:00 committed by Lee Jones
parent f1d8fe2e98
commit 4d3ec936f8
1 changed files with 54 additions and 36 deletions
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90
drivers/mfd/lm3533-ctrlbank.c
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@ -17,7 +17,6 @@
#define LM3533_MAX_CURRENT_MAX 29800
#define LM3533_MAX_CURRENT_STEP 800
#define LM3533_BRIGHTNESS_MAX 255
#define LM3533_PWM_MAX 0x3f
#define LM3533_REG_PWM_BASE 0x14
@ -89,41 +88,33 @@ int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
}
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) \
{ \
u8 reg; \
int ret; \
\
if (val > LM3533_##_NAME##_MAX) \
return -EINVAL; \
\
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
ret = lm3533_write(cb->lm3533, reg, val); \
if (ret) \
dev_err(cb->dev, "failed to set " #_name "\n"); \
\
return ret; \
} \
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name);
int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val)
{
u8 reg;
int ret;
#define lm3533_ctrlbank_get(_name, _NAME) \
int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank *cb, u8 *val) \
{ \
u8 reg; \
int ret; \
\
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \
ret = lm3533_read(cb->lm3533, reg, val); \
if (ret) \
dev_err(cb->dev, "failed to get " #_name "\n"); \
\
return ret; \
} \
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name);
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
ret = lm3533_write(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to set brightness\n");
lm3533_ctrlbank_set(brightness, BRIGHTNESS);
lm3533_ctrlbank_get(brightness, BRIGHTNESS);
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_brightness);
int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
ret = lm3533_read(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to get brightness\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_brightness);
/*
* PWM-input control mask:
@ -135,9 +126,36 @@ lm3533_ctrlbank_get(brightness, BRIGHTNESS);
* bit 1 - PWM-input enabled in Zone 0
* bit 0 - PWM-input enabled
*/
lm3533_ctrlbank_set(pwm, PWM);
lm3533_ctrlbank_get(pwm, PWM);
int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val)
{
u8 reg;
int ret;
if (val > LM3533_PWM_MAX)
return -EINVAL;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
ret = lm3533_write(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to set PWM mask\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_pwm);
int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
ret = lm3533_read(cb->lm3533, reg, val);
if (ret)
dev_err(cb->dev, "failed to get PWM mask\n");
return ret;
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_pwm);
MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
MODULE_DESCRIPTION("LM3533 Control Bank interface");