ARM: OMAP4+: pmic: Make generic bus init and write functions

Voltage scaling can be done in two ways:
-> Using SR I2C
-> Using GP I2C
In order to support both, have a function pointer in pmic_data
so that we can call as per our requirement.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>

arch/arm/cpu/armv7/omap-common/clocks-common.c

@@ -487,6 +487,7 @@ void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic)
 	u32 offset = volt_mv;
 	int ret = 0;
 
+	pmic->pmic_bus_init();
 	/* See if we can first get the GPIO if needed */
 	if (pmic->gpio_en)
 		ret = gpio_request(pmic->gpio, "PMIC_GPIO");
@@ -509,8 +510,7 @@ void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic)
 	debug("do_scale_vcore: volt - %d offset_code - 0x%x\n", volt_mv,
 		offset_code);
 
-	if (omap_vc_bypass_send_value(SMPS_I2C_SLAVE_ADDR,
-				vcore_reg, offset_code))
+	if (pmic->pmic_write(pmic->i2c_slave_addr, vcore_reg, offset_code))
 		printf("Scaling voltage failed for 0x%x\n", vcore_reg);
 
 	if (pmic->gpio_en)
@@ -525,8 +525,6 @@ void do_scale_vcore(u32 vcore_reg, u32 volt_mv, struct pmic_data *pmic)
  */
 void scale_vcores(struct vcores_data const *vcores)
 {
-	omap_vc_init(PRM_VC_I2C_CHANNEL_FREQ_KHZ);
-
 	do_scale_vcore(vcores->core.addr, vcores->core.value,
 					  vcores->core.pmic);
 

arch/arm/cpu/armv7/omap-common/vc.c

@@ -17,6 +17,7 @@
 #include <common.h>
 #include <asm/omap_common.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/arch/clock.h>
 
 /*
  * Define Master code if there are multiple masters on the I2C_SR bus.
@@ -57,7 +58,7 @@
  * omap_vc_init() - Initialization for Voltage controller
  * @speed_khz: I2C buspeed in KHz
  */
-void omap_vc_init(u16 speed_khz)
+static void omap_vc_init(u16 speed_khz)
 {
 	u32 val;
 	u32 sys_clk_khz, cycles_hi, cycles_low;
@@ -137,3 +138,14 @@ int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data)
 	/* All good.. */
 	return 0;
 }
+
+void sri2c_init(void)
+{
+	static int sri2c = 1;
+
+	if (sri2c) {
+		omap_vc_init(PRM_VC_I2C_CHANNEL_FREQ_KHZ);
+		sri2c = 0;
+	}
+	return;
+}

arch/arm/cpu/armv7/omap4/hw_data.c

@@ -219,6 +219,9 @@ struct pmic_data twl6030_4430es1 = {
 	.step = 12660, /* 12.66 mV represented in uV */
 	/* The code starts at 1 not 0 */
 	.start_code = 1,
+	.i2c_slave_addr	= SMPS_I2C_SLAVE_ADDR,
+	.pmic_bus_init	= sri2c_init,
+	.pmic_write	= omap_vc_bypass_send_value,
 };
 
 struct pmic_data twl6030 = {
@@ -226,6 +229,9 @@ struct pmic_data twl6030 = {
 	.step = 12660, /* 12.66 mV represented in uV */
 	/* The code starts at 1 not 0 */
 	.start_code = 1,
+	.i2c_slave_addr	= SMPS_I2C_SLAVE_ADDR,
+	.pmic_bus_init	= sri2c_init,
+	.pmic_write	= omap_vc_bypass_send_value,
 };
 
 struct pmic_data tps62361 = {
@@ -233,7 +239,10 @@ struct pmic_data tps62361 = {
 	.step = 10000, /* 10 mV represented in uV */
 	.start_code = 0,
 	.gpio = TPS62361_VSEL0_GPIO,
-	.gpio_en = 1
+	.gpio_en = 1,
+	.i2c_slave_addr	= SMPS_I2C_SLAVE_ADDR,
+	.pmic_bus_init	= sri2c_init,
+	.pmic_write	= omap_vc_bypass_send_value,
 };
 
 struct vcores_data omap4430_volts_es1 = {

arch/arm/cpu/armv7/omap5/hw_data.c

@@ -289,6 +289,9 @@ struct pmic_data palmas = {
 	 * Offset code 0 switches OFF the SMPS
 	 */
 	.start_code = 6,
+	.i2c_slave_addr	= SMPS_I2C_SLAVE_ADDR,
+	.pmic_bus_init	= sri2c_init,
+	.pmic_write	= omap_vc_bypass_send_value,
 };
 
 struct vcores_data omap5430_volts = {

arch/arm/include/asm/arch-omap4/sys_proto.h

@@ -57,7 +57,7 @@ u32 cortex_rev(void);
 void save_omap_boot_params(void);
 void init_omap_revision(void);
 void do_io_settings(void);
-void omap_vc_init(u16 speed_khz);
+void sri2c_init(void);
 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data);
 u32 warm_reset(void);
 void force_emif_self_refresh(void);

arch/arm/include/asm/arch-omap5/sys_proto.h

@@ -61,7 +61,7 @@ u32 cortex_rev(void);
 void save_omap_boot_params(void);
 void init_omap_revision(void);
 void do_io_settings(void);
-void omap_vc_init(u16 speed_khz);
+void sri2c_init(void);
 int omap_vc_bypass_send_value(u8 sa, u8 reg_addr, u8 reg_data);
 u32 warm_reset(void);
 void force_emif_self_refresh(void);

arch/arm/include/asm/omap_common.h

@@ -501,6 +501,9 @@ struct pmic_data {
 	u32 start_code;
 	unsigned gpio;
 	int gpio_en;
+	u32 i2c_slave_addr;
+	void (*pmic_bus_init)(void);
+	int (*pmic_write)(u8 sa, u8 reg_addr, u8 reg_data);
 };
 
 struct volts {