ARM: MXS: refactor mx2*_power_init source configuration

Having three ints as parameter suggests that we can use up to 2^3
power configurations for the system, but when we look at the code, the
power setup is packaged in if {...} else if {...} else if {...} blocks,
so setting more than one parameter to 1 is useless here.

Refactor the parameters into an enum to get rid of that suggestion.

Signed-off-by: Roland Hieber <r.hieber@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 37 insertions, 36 deletions

diff --git a/arch/arm/mach-mxs/include/mach/init.h b/arch/arm/mach-mxs/include/mach/init.h
index 66dfd635de..878cf4ad62 100644
--- a/arch/arm/mach-mxs/include/mach/init.h
+++ b/arch/arm/mach-mxs/include/mach/init.h
@@ -12,10 +12,26 @@
 
 void mxs_early_delay(int delay);
 
-void mx23_power_init(int __has_battery, int __use_battery_input,
-		int __use_5v_input);
-void mx28_power_init(int __has_battery, int __use_battery_input,
-		int __use_5v_input);
+/**
+ * Power configuration of the system:
+ * - POWER_USE_5V: use 5V input as power supply
+ * - POWER_USE_BATTERY: use battery input when the system is supplied by a battery
+ * - POWER_USE_BATTERY_INPUT: use battery input when the system is supplied by
+ *   a DC source (instead of a real battery) on the battery input
+ */
+enum mxs_power_config {
+	POWER_USE_5V			= 0b00000000,
+	POWER_USE_BATTERY		= 0b00000001,
+	POWER_USE_BATTERY_INPUT		= 0b00000010,
+};
+extern int power_config;
+static inline enum mxs_power_config mxs_power_config_get_use(void) {
+	return (power_config & 0b00000011);
+}
+
+
+void mx23_power_init(const int config);
+void mx28_power_init(const int config);
 void mxs_power_wait_pswitch(void);
 
 extern const uint32_t mx28_dram_vals_default[190];
diff --git a/arch/arm/mach-mxs/power-init.c b/arch/arm/mach-mxs/power-init.c
index 595b51c5ba..14f9b7cca7 100644
--- a/arch/arm/mach-mxs/power-init.c
+++ b/arch/arm/mach-mxs/power-init.c
@@ -24,21 +24,7 @@
 #include <mach/regs-rtc.h>
 #include <mach/regs-lradc.h>
 
-/*
- * has_battery - true when this board has a battery.
- */
-static int has_battery;
-
-/*
- * use_battery_input - true when this board is supplied from the
- * battery input, but has a DC source instead of a real battery
- */
-static int use_battery_input;
-
-/*
- * use_5v_input - true when this board can use the 5V input
- */
-static int use_5v_input;
+int power_config;
 
 static void mxs_power_status(void)
 {
@@ -514,7 +500,8 @@ static void mxs_power_enable_4p2(void)
 		POWER_5VCTRL_HEADROOM_ADJ_MASK,
 		0x4 << POWER_5VCTRL_HEADROOM_ADJ_OFFSET);
 
-	if (has_battery || use_battery_input)
+	if (mxs_power_config_get_use() == POWER_USE_BATTERY ||
+	    mxs_power_config_get_use() == POWER_USE_BATTERY_INPUT)
 		dropout_ctrl = POWER_DCDC4P2_DROPOUT_CTRL_SRC_SEL;
 	else
 		dropout_ctrl = POWER_DCDC4P2_DROPOUT_CTRL_SRC_4P2;
@@ -1182,16 +1169,15 @@ static void mx23_ungate_power(void)
  *
  * This function calls all the power block initialization functions in
  * proper sequence to start the power block.
+ *
+ * @config: see enum mxs_power_config for possible options
  */
-void mx23_power_init(int __has_battery, int __use_battery_input,
-		int __use_5v_input)
+void mx23_power_init(const int config)
 {
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
 
-	has_battery = __has_battery;
-	use_battery_input = __use_battery_input;
-	use_5v_input = __use_5v_input;
+	power_config = config;
 
 	mx23_ungate_power();
 
@@ -1204,11 +1190,11 @@ void mx23_power_init(int __has_battery, int __use_battery_input,
 
 	mxs_src_power_init();
 
-	if (has_battery)
+	if (mxs_power_config_get_use() == POWER_USE_BATTERY)
 		mxs_power_configure_power_source();
-	else if (use_battery_input)
+	else if (mxs_power_config_get_use() == POWER_USE_BATTERY_INPUT)
 		mxs_enable_battery_input();
-	else if (use_5v_input)
+	else if (mxs_power_config_get_use() == POWER_USE_5V)
 		mxs_boot_valid_5v();
 
 	mxs_power_clock2pll();
@@ -1243,16 +1229,15 @@ void mx23_power_init(int __has_battery, int __use_battery_input,
  *
  * This function calls all the power block initialization functions in
  * proper sequence to start the power block.
+ *
+ * @config: see enum mxs_power_config for possible options
  */
-void mx28_power_init(int __has_battery, int __use_battery_input,
-		int __use_5v_input)
+void mx28_power_init(const int config)
 {
 	struct mxs_power_regs *power_regs =
 		(struct mxs_power_regs *)IMX_POWER_BASE;
 
-	has_battery = __has_battery;
-	use_battery_input = __use_battery_input;
-	use_5v_input = __use_5v_input;
+	power_config = config;
 
 	mxs_power_status();
 	mxs_power_clock2xtal();
@@ -1264,11 +1249,11 @@ void mx28_power_init(int __has_battery, int __use_battery_input,
 
 	mxs_src_power_init();
 
-	if (has_battery)
+	if (mxs_power_config_get_use() == POWER_USE_BATTERY)
 		mxs_power_configure_power_source();
-	else if (use_battery_input)
+	else if (mxs_power_config_get_use() == POWER_USE_BATTERY_INPUT)
 		mxs_enable_battery_input();
-	else if (use_5v_input)
+	else if (mxs_power_config_get_use() == POWER_USE_5V)
 		mxs_boot_valid_5v();
 
 	mxs_power_clock2pll();