board: ti: dra71x-evm: Add PMIC support

Add the pmic_data for LP873x PMIC which is used to power
up dra71x-evm.

Note: As per the DM[1] DRA71x supports only OP_NOM. So, updating
the efuse registers only to use OPP_NOM irrespective of any
CONFIG_DRA7_<VOLT>_OPP_{NOM,od,high} is defined.

[1] http://www.ti.com/product/DRA718/technicaldocuments

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

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

@@ -324,6 +324,9 @@
 /* Standard offset is 0.5v expressed in uv */
 #define PALMAS_SMPS_BASE_VOLT_UV 500000
 
+/* Offset is 0.73V for LP873x */
+#define LP873X_BUCK_BASE_VOLT_UV		730000
+
 /* TPS659038 */
 #define TPS659038_I2C_SLAVE_ADDR		0x58
 #define TPS659038_REG_ADDR_SMPS12		0x23
@@ -338,6 +341,11 @@
 #define TPS65917_REG_ADDR_SMPS2		0x27
 #define TPS65917_REG_ADDR_SMPS3		0x2F
 
+/* LP873X */
+#define LP873X_I2C_SLAVE_ADDR		0x60
+#define LP873X_REG_ADDR_BUCK0		0x6
+#define LP873X_REG_ADDR_BUCK1		0x7
+#define LP873X_REG_ADDR_LDO1		0xA
 
 /* TPS */
 #define TPS62361_I2C_SLAVE_ADDR		0x60

arch/arm/include/asm/omap_common.h

@@ -600,6 +600,7 @@ extern struct omap_sys_ctrl_regs const omap5_ctrl;
 extern struct omap_sys_ctrl_regs const dra7xx_ctrl;
 
 extern struct pmic_data tps659038;
+extern struct pmic_data lp8733;
 
 void hw_data_init(void);
 

arch/arm/mach-omap2/omap5/hw_data.c

@@ -336,6 +336,22 @@ struct pmic_data tps659038 = {
 	.gpio_en = 0,
 };
 
+/* The LP8732 and LP8733 are software-compatible, use common struct */
+struct pmic_data lp8733 = {
+	.base_offset = LP873X_BUCK_BASE_VOLT_UV,
+	.step = 5000, /* 5 mV represented in uV */
+	/*
+	 * Offset codes 0 - 0x13 Invalid.
+	 * Offset codes 0x14 0x17 give 10mV steps
+	 * Offset codes 0x17 through 0x9D give 5mV steps
+	 * So let us start with our operating range from .73V
+	 */
+	.start_code = 0x17,
+	.i2c_slave_addr = 0x60,
+	.pmic_bus_init  = gpi2c_init,
+	.pmic_write     = palmas_i2c_write_u8,
+};
+
 struct vcores_data omap5430_volts = {
 	.mpu.value[OPP_NOM] = VDD_MPU,
 	.mpu.addr = SMPS_REG_ADDR_12_MPU,

board/ti/dra7xx/evm.c

@@ -408,10 +408,60 @@ struct vcores_data dra722_volts = {
 	.iva.abb_tx_done_mask = OMAP_ABB_IVA_TXDONE_MASK,
 };
 
+struct vcores_data dra718_volts = {
+	/*
+	 * In the case of dra71x GPU MPU and CORE
+	 * are all powered up by BUCK0 of LP873X PMIC
+	 */
+	.mpu.value[OPP_NOM]	= VDD_MPU_DRA7_NOM,
+	.mpu.efuse.reg[OPP_NOM]	= STD_FUSE_OPP_VMIN_MPU_NOM,
+	.mpu.efuse.reg_bits	= DRA752_EFUSE_REGBITS,
+	.mpu.addr	= LP873X_REG_ADDR_BUCK0,
+	.mpu.pmic	= &lp8733,
+	.mpu.abb_tx_done_mask = OMAP_ABB_MPU_TXDONE_MASK,
+
+	.core.value[OPP_NOM]		= VDD_CORE_DRA7_NOM,
+	.core.efuse.reg[OPP_NOM]	= STD_FUSE_OPP_VMIN_CORE_NOM,
+	.core.efuse.reg_bits = DRA752_EFUSE_REGBITS,
+	.core.addr	= LP873X_REG_ADDR_BUCK0,
+	.core.pmic	= &lp8733,
+
+	.gpu.value[OPP_NOM]	= VDD_GPU_DRA7_NOM,
+	.gpu.efuse.reg[OPP_NOM]	= STD_FUSE_OPP_VMIN_GPU_NOM,
+	.gpu.efuse.reg_bits = DRA752_EFUSE_REGBITS,
+	.gpu.addr	= LP873X_REG_ADDR_BUCK0,
+	.gpu.pmic	= &lp8733,
+	.gpu.abb_tx_done_mask = OMAP_ABB_GPU_TXDONE_MASK,
+
+	/*
+	 * The DSPEVE and IVA rails are grouped on DRA71x-evm
+	 * and are powered by BUCK1 of LP873X PMIC
+	 */
+	.eve.value[OPP_NOM]	= VDD_EVE_DRA7_NOM,
+	.eve.efuse.reg[OPP_NOM]	= STD_FUSE_OPP_VMIN_DSPEVE_NOM,
+	.eve.efuse.reg_bits = DRA752_EFUSE_REGBITS,
+	.eve.addr	= LP873X_REG_ADDR_BUCK1,
+	.eve.pmic	= &lp8733,
+	.eve.abb_tx_done_mask = OMAP_ABB_EVE_TXDONE_MASK,
+
+	.iva.value[OPP_NOM]	= VDD_IVA_DRA7_NOM,
+	.iva.efuse.reg[OPP_NOM]	= STD_FUSE_OPP_VMIN_IVA_NOM,
+	.iva.efuse.reg_bits = DRA752_EFUSE_REGBITS,
+	.iva.addr	= LP873X_REG_ADDR_BUCK1,
+	.iva.pmic	= &lp8733,
+	.iva.abb_tx_done_mask = OMAP_ABB_IVA_TXDONE_MASK,
+};
+
 int get_voltrail_opp(int rail_offset)
 {
 	int opp;
 
+	/*
+	 * DRA71x supports only OPP_NOM.
+	 */
+	if (board_is_dra71x_evm())
+		return OPP_NOM;
+
 	switch (rail_offset) {
 	case VOLT_MPU:
 		opp = DRA7_MPU_OPP;
@@ -541,6 +591,8 @@ void vcores_init(void)
 		*omap_vcores = &dra752_volts;
 	} else if (board_is_dra72x_evm()) {
 		*omap_vcores = &dra722_volts;
+	} else if (board_is_dra71x_evm()) {
+		*omap_vcores = &dra718_volts;
 	} else {
 		/* If EEPROM is not populated */
 		if (is_dra72x())