From 4d3ec936f80dbb2174c8c1f426eb86c032e9f14e Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Tue, 30 Jun 2020 10:39:48 +0200
Subject: [PATCH] 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>
---
 drivers/mfd/lm3533-ctrlbank.c | 90 +++++++++++++++++++++--------------
 1 file changed, 54 insertions(+), 36 deletions(-)

diff --git a/drivers/mfd/lm3533-ctrlbank.c b/drivers/mfd/lm3533-ctrlbank.c
index 34fba06ec705..2537dfade51c 100644
--- a/drivers/mfd/lm3533-ctrlbank.c
+++ b/drivers/mfd/lm3533-ctrlbank.c
@@ -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");