drivers: st: pmic: update stpmic1 driver

Change-Id: I4a1b281925e0a3a1e2a34b3e363537e4a7f13823
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>

drivers/st/pmic/stpmic1.c

@@ -16,6 +16,10 @@ struct regul_struct {
 	uint8_t voltage_table_size;
 	uint8_t control_reg;
 	uint8_t low_power_reg;
+	uint8_t pull_down_reg;
+	uint8_t pull_down;
+	uint8_t mask_reset_reg;
+	uint8_t mask_reset;
 };
 
 static struct i2c_handle_s *pmic_i2c_handle;
@@ -23,11 +27,11 @@ static uint16_t pmic_i2c_addr;
 
 /* Voltage tables in mV */
 static const uint16_t buck1_voltage_table[] = {
-	600,
-	625,
-	650,
-	675,
-	700,
+	725,
+	725,
+	725,
+	725,
+	725,
 	725,
 	750,
 	775,
@@ -54,7 +58,39 @@ static const uint16_t buck1_voltage_table[] = {
 	1300,
 	1325,
 	1350,
-	1350,
+	1375,
+	1400,
+	1425,
+	1450,
+	1475,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
+	1500,
 };
 
 static const uint16_t buck2_voltage_table[] = {
@@ -308,6 +344,7 @@ static const uint16_t ldo3_voltage_table[] = {
 	3300,
 	3300,
 	3300,
+	500,
 	0xFFFF, /* VREFDDR */
 };
 
@@ -389,6 +426,10 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(buck1_voltage_table),
 		.control_reg	= BUCK1_CONTROL_REG,
 		.low_power_reg	= BUCK1_PWRCTRL_REG,
+		.pull_down_reg	= BUCK_PULL_DOWN_REG,
+		.pull_down	= BUCK1_PULL_DOWN_SHIFT,
+		.mask_reset_reg	= MASK_RESET_BUCK_REG,
+		.mask_reset	= BUCK1_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "buck2",
@@ -396,6 +437,10 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(buck2_voltage_table),
 		.control_reg	= BUCK2_CONTROL_REG,
 		.low_power_reg	= BUCK2_PWRCTRL_REG,
+		.pull_down_reg	= BUCK_PULL_DOWN_REG,
+		.pull_down	= BUCK2_PULL_DOWN_SHIFT,
+		.mask_reset_reg	= MASK_RESET_BUCK_REG,
+		.mask_reset	= BUCK2_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "buck3",
@@ -403,6 +448,10 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(buck3_voltage_table),
 		.control_reg	= BUCK3_CONTROL_REG,
 		.low_power_reg	= BUCK3_PWRCTRL_REG,
+		.pull_down_reg	= BUCK_PULL_DOWN_REG,
+		.pull_down	= BUCK3_PULL_DOWN_SHIFT,
+		.mask_reset_reg	= MASK_RESET_BUCK_REG,
+		.mask_reset	= BUCK3_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "buck4",
@@ -410,6 +459,10 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(buck4_voltage_table),
 		.control_reg	= BUCK4_CONTROL_REG,
 		.low_power_reg	= BUCK4_PWRCTRL_REG,
+		.pull_down_reg	= BUCK_PULL_DOWN_REG,
+		.pull_down	= BUCK4_PULL_DOWN_SHIFT,
+		.mask_reset_reg	= MASK_RESET_BUCK_REG,
+		.mask_reset	= BUCK4_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "ldo1",
@@ -417,6 +470,8 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(ldo1_voltage_table),
 		.control_reg	= LDO1_CONTROL_REG,
 		.low_power_reg	= LDO1_PWRCTRL_REG,
+		.mask_reset_reg	= MASK_RESET_LDO_REG,
+		.mask_reset	= LDO1_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "ldo2",
@@ -424,6 +479,8 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(ldo2_voltage_table),
 		.control_reg	= LDO2_CONTROL_REG,
 		.low_power_reg	= LDO2_PWRCTRL_REG,
+		.mask_reset_reg	= MASK_RESET_LDO_REG,
+		.mask_reset	= LDO2_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "ldo3",
@@ -431,6 +488,8 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(ldo3_voltage_table),
 		.control_reg	= LDO3_CONTROL_REG,
 		.low_power_reg	= LDO3_PWRCTRL_REG,
+		.mask_reset_reg	= MASK_RESET_LDO_REG,
+		.mask_reset	= LDO3_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "ldo4",
@@ -438,6 +497,8 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(ldo4_voltage_table),
 		.control_reg	= LDO4_CONTROL_REG,
 		.low_power_reg	= LDO4_PWRCTRL_REG,
+		.mask_reset_reg	= MASK_RESET_LDO_REG,
+		.mask_reset	= LDO4_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "ldo5",
@@ -445,6 +506,8 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(ldo5_voltage_table),
 		.control_reg	= LDO5_CONTROL_REG,
 		.low_power_reg	= LDO5_PWRCTRL_REG,
+		.mask_reset_reg	= MASK_RESET_LDO_REG,
+		.mask_reset	= LDO5_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "ldo6",
@@ -452,6 +515,8 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(ldo6_voltage_table),
 		.control_reg	= LDO6_CONTROL_REG,
 		.low_power_reg	= LDO6_PWRCTRL_REG,
+		.mask_reset_reg	= MASK_RESET_LDO_REG,
+		.mask_reset	= LDO6_MASK_RESET,
 	},
 	{
 		.dt_node_name	= "vref_ddr",
@@ -459,6 +524,8 @@ static const struct regul_struct regulators_table[] = {
 		.voltage_table_size = ARRAY_SIZE(vref_ddr_voltage_table),
 		.control_reg	= VREF_DDR_CONTROL_REG,
 		.low_power_reg	= VREF_DDR_PWRCTRL_REG,
+		.mask_reset_reg	= MASK_RESET_LDO_REG,
+		.mask_reset	= VREF_DDR_MASK_RESET,
 	},
 };
 
@@ -497,6 +564,12 @@ static uint8_t voltage_to_index(const char *name, uint16_t millivolts)
 	return 0;
 }
 
+int stpmic1_powerctrl_on(void)
+{
+	return stpmic1_register_update(MAIN_CONTROL_REG, PWRCTRL_PIN_VALID,
+				       PWRCTRL_PIN_VALID);
+}
+
 int stpmic1_switch_off(void)
 {
 	return stpmic1_register_update(MAIN_CONTROL_REG, 1,
@@ -533,9 +606,72 @@ int stpmic1_regulator_voltage_set(const char *name, uint16_t millivolts)
 {
 	uint8_t voltage_index = voltage_to_index(name, millivolts);
 	const struct regul_struct *regul = get_regulator_data(name);
+	uint8_t mask;
+
+	/* Voltage can be set for buck<N> or ldo<N> (except ldo4) regulators */
+	if (strncmp(name, "buck", 4) == 0) {
+		mask = BUCK_VOLTAGE_MASK;
+	} else if ((strncmp(name, "ldo", 3) == 0) &&
+		   (strncmp(name, "ldo4", 4) != 0)) {
+		mask = LDO_VOLTAGE_MASK;
+	} else {
+		return 0;
+	}
+
+	return stpmic1_register_update(regul->control_reg,
+				       voltage_index << LDO_BUCK_VOLTAGE_SHIFT,
+				       mask);
+}
+
+int stpmic1_regulator_pull_down_set(const char *name)
+{
+	const struct regul_struct *regul = get_regulator_data(name);
+
+	if (regul->pull_down_reg != 0) {
+		return stpmic1_register_update(regul->pull_down_reg,
+					       BIT(regul->pull_down),
+					       LDO_BUCK_PULL_DOWN_MASK <<
+					       regul->pull_down);
+	}
+
+	return 0;
+}
+
+int stpmic1_regulator_mask_reset_set(const char *name)
+{
+	const struct regul_struct *regul = get_regulator_data(name);
+
+	return stpmic1_register_update(regul->mask_reset_reg,
+				       BIT(regul->mask_reset),
+				       LDO_BUCK_RESET_MASK <<
+				       regul->mask_reset);
+}
+
+int stpmic1_regulator_voltage_get(const char *name)
+{
+	const struct regul_struct *regul = get_regulator_data(name);
+	uint8_t value;
+	uint8_t mask;
+
+	/* Voltage can be set for buck<N> or ldo<N> (except ldo4) regulators */
+	if (strncmp(name, "buck", 4) == 0) {
+		mask = BUCK_VOLTAGE_MASK;
+	} else if ((strncmp(name, "ldo", 3) == 0) &&
+		   (strncmp(name, "ldo4", 4) != 0)) {
+		mask = LDO_VOLTAGE_MASK;
+	} else {
+		return 0;
+	}
+
+	if (stpmic1_register_read(regul->control_reg, &value))
+		return -1;
+
+	value = (value & mask) >> LDO_BUCK_VOLTAGE_SHIFT;
+
+	if (value > regul->voltage_table_size)
+		return -1;
 
-	return stpmic1_register_update(regul->control_reg, voltage_index << 2,
-				       0xFC);
+	return (int)regul->voltage_table[value];
 }
 
 int stpmic1_register_read(uint8_t register_id,  uint8_t *value)
@@ -553,6 +689,7 @@ int stpmic1_register_write(uint8_t register_id, uint8_t value)
 				     (uint16_t)register_id,
 				     I2C_MEMADD_SIZE_8BIT, &value, 1, 100000);
 
+#if ENABLE_ASSERTIONS
 	if (status != 0) {
 		return status;
 	}
@@ -569,8 +706,9 @@ int stpmic1_register_write(uint8_t register_id, uint8_t value)
 			return -1;
 		}
 	}
+#endif
 
-	return 0;
+	return status;
 }
 
 int stpmic1_register_update(uint8_t register_id, uint8_t value, uint8_t mask)
@@ -583,13 +721,8 @@ int stpmic1_register_update(uint8_t register_id, uint8_t value, uint8_t mask)
 		return status;
 	}
 
-	/* Clear bits to update */
-	val &= ~mask;
+	val = (val & ~mask) | (value & mask);
 
-	/* Update appropriate bits*/
-	val |= (value & mask);
-
-	/* Send new value on I2C Bus */
 	return stpmic1_register_write(register_id, val);
 }
 
@@ -598,3 +731,32 @@ void stpmic1_bind_i2c(struct i2c_handle_s *i2c_handle, uint16_t i2c_addr)
 	pmic_i2c_handle = i2c_handle;
 	pmic_i2c_addr = i2c_addr;
 }
+
+void stpmic1_dump_regulators(void)
+{
+	uint32_t i;
+
+	for (i = 0U; i < MAX_REGUL; i++) {
+		const char *name __unused = regulators_table[i].dt_node_name;
+
+		VERBOSE("PMIC regul %s: %sable, %dmV",
+			name,
+			stpmic1_is_regulator_enabled(name) ? "en" : "dis",
+			stpmic1_regulator_voltage_get(name));
+	}
+}
+
+int stpmic1_get_version(unsigned long *version)
+{
+	int rc;
+	uint8_t read_val;
+
+	rc = stpmic1_register_read(VERSION_STATUS_REG, &read_val);
+	if (rc) {
+		return -1;
+	}
+
+	*version = (unsigned long)read_val;
+
+	return 0;
+}

include/drivers/st/stpmic1.h

@@ -84,18 +84,40 @@
 #define ITSOURCE2_REG			0xB1U
 #define ITSOURCE3_REG			0xB2U
 #define ITSOURCE4_REG			0xB3U
+
+/* Registers masks */
 #define LDO_VOLTAGE_MASK		0x7CU
 #define BUCK_VOLTAGE_MASK		0xFCU
 #define LDO_BUCK_VOLTAGE_SHIFT		2
-#define LDO_ENABLE_MASK			0x01U
-#define BUCK_ENABLE_MASK		0x01U
-#define BUCK_HPLP_ENABLE_MASK		0x02U
-#define LDO_HPLP_ENABLE_MASK		0x02U
+#define LDO_BUCK_ENABLE_MASK		0x01U
+#define LDO_BUCK_HPLP_ENABLE_MASK	0x02U
 #define LDO_BUCK_HPLP_SHIFT		1
 #define LDO_BUCK_RANK_MASK		0x01U
 #define LDO_BUCK_RESET_MASK		0x01U
 #define LDO_BUCK_PULL_DOWN_MASK		0x03U
 
+/* Pull down register */
+#define BUCK1_PULL_DOWN_SHIFT		0
+#define BUCK2_PULL_DOWN_SHIFT		2
+#define BUCK3_PULL_DOWN_SHIFT		4
+#define BUCK4_PULL_DOWN_SHIFT		6
+#define VREF_DDR_PULL_DOWN_SHIFT	4
+
+/* Buck Mask reset register */
+#define BUCK1_MASK_RESET		0
+#define BUCK2_MASK_RESET		1
+#define BUCK3_MASK_RESET		2
+#define BUCK4_MASK_RESET		3
+
+/* LDO Mask reset register */
+#define LDO1_MASK_RESET			0
+#define LDO2_MASK_RESET			1
+#define LDO3_MASK_RESET			2
+#define LDO4_MASK_RESET			3
+#define LDO5_MASK_RESET			4
+#define LDO6_MASK_RESET			5
+#define VREF_DDR_MASK_RESET		6
+
 /* Main PMIC Control Register (MAIN_CONTROL_REG) */
 #define ICC_EVENT_ENABLED		BIT(4)
 #define PWRCTRL_POLARITY_HIGH		BIT(3)
@@ -127,6 +149,7 @@
 #define SWIN_SWOUT_ENABLED		BIT(2)
 #define USBSW_OTG_SWITCH_ENABLED	BIT(1)
 
+int stpmic1_powerctrl_on(void);
 int stpmic1_switch_off(void);
 int stpmic1_register_read(uint8_t register_id, uint8_t *value);
 int stpmic1_register_write(uint8_t register_id, uint8_t value);
@@ -135,6 +158,12 @@ int stpmic1_regulator_enable(const char *name);
 int stpmic1_regulator_disable(const char *name);
 uint8_t stpmic1_is_regulator_enabled(const char *name);
 int stpmic1_regulator_voltage_set(const char *name, uint16_t millivolts);
+int stpmic1_regulator_voltage_get(const char *name);
+int stpmic1_regulator_pull_down_set(const char *name);
+int stpmic1_regulator_mask_reset_set(const char *name);
 void stpmic1_bind_i2c(struct i2c_handle_s *i2c_handle, uint16_t i2c_addr);
 
+int stpmic1_get_version(unsigned long *version);
+void stpmic1_dump_regulators(void);
+
 #endif /* STPMIC1_H */