[U-Boot] [PATCH v4 4/6] power: regulator: palmas: Add regulator support
Keerthy
j-keerthy at ti.com
Mon Sep 26 06:35:08 CEST 2016
The driver provides regulator set/get voltage
enable/disable functions for palmas family of PMICs.
Signed-off-by: Keerthy <j-keerthy at ti.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Tom Rini <trini at konsulko.com>
---
drivers/power/regulator/Kconfig | 8 +
drivers/power/regulator/Makefile | 1 +
drivers/power/regulator/palmas_regulator.c | 457 +++++++++++++++++++++++++++++
3 files changed, 466 insertions(+)
create mode 100644 drivers/power/regulator/palmas_regulator.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 17f22dd..adb710a 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -115,3 +115,11 @@ config REGULATOR_TPS65090
regulators, one for each FET. The standard regulator interface is
supported, but it is only possible to turn the regulators on or off.
There is no voltage/current control.
+
+config DM_REGULATOR_PALMAS
+ bool "Enable driver for PALMAS PMIC regulators"
+ depends on PMIC_PALMAS
+ ---help---
+ This enables implementation of driver-model regulator uclass
+ features for REGULATOR PALMAS and the family of PALMAS PMICs.
+ The driver implements get/set api for: value and enable.
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index 1590d85..75080d4 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_REGULATOR_RK808) += rk808.o
obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o
obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o
+obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o
diff --git a/drivers/power/regulator/palmas_regulator.c b/drivers/power/regulator/palmas_regulator.c
new file mode 100644
index 0000000..14bc701
--- /dev/null
+++ b/drivers/power/regulator/palmas_regulator.c
@@ -0,0 +1,457 @@
+/*
+ * (C) Copyright 2016
+ * Texas Instruments Incorporated, <www.ti.com>
+ *
+ * Keerthy <j-keerthy at ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/palmas.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define REGULATOR_ON 0x1
+#define REGULATOR_OFF 0x0
+
+#define SMPS_MODE_MASK 0x3
+#define SMPS_MODE_SHIFT 0x0
+#define LDO_MODE_MASK 0x1
+#define LDO_MODE_SHIFT 0x0
+
+static const char palmas_smps_ctrl[][PALMAS_SMPS_NUM] = {
+ {0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 0x3c},
+ {0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38},
+ {0x20, 0x24, 0x2c, 0x30, 0x38},
+};
+
+static const char palmas_smps_volt[][PALMAS_SMPS_NUM] = {
+ {0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b, 0x3c},
+ {0x23, 0x27, 0x2b, 0x2f, 0x33, 0x37, 0x3b},
+ {0x23, 0x27, 0x2f, 0x33, 0x3B}
+};
+
+static const char palmas_ldo_ctrl[][PALMAS_LDO_NUM] = {
+ {0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
+ {0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x62, 0x64},
+ {0x50, 0x52, 0x54, 0x5e, 0x62}
+};
+
+static const char palmas_ldo_volt[][PALMAS_LDO_NUM] = {
+ {0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
+ {0x51, 0x53, 0x55, 0x57, 0x59, 0x5b, 0x5d, 0x5f, 0x61, 0x63, 0x65},
+ {0x51, 0x53, 0x55, 0x5f, 0x63}
+};
+
+static int palmas_smps_enable(struct udevice *dev, int op, bool *enable)
+{
+ int ret;
+ uint8_t val;
+ unsigned int adr;
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+ adr = uc_pdata->ctrl_reg;
+
+ ret = dm_i2c_u8_read(dev->parent, adr, &val);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ val &= PALMAS_SMPS_STATUS_MASK;
+
+ if (val)
+ *enable = true;
+ else
+ *enable = false;
+
+ return 0;
+ } else if (op == PMIC_OP_SET) {
+ if (*enable)
+ val |= PALMAS_SMPS_MODE_MASK;
+ else
+ val &= ~(PALMAS_SMPS_MODE_MASK);
+
+ ret = dm_i2c_u8_write(dev->parent, adr, &val);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int palmas_smps_volt2hex(int uV)
+{
+ if (uV > PALMAS_LDO_VOLT_MAX)
+ return -EINVAL;
+
+ if (uV > 1650000)
+ return (uV - 1000000) / 20000 + 0x6;
+
+ if (uV == 500000)
+ return 0x6;
+ else
+ return 0x6 + ((uV - 500000) / 10000);
+}
+
+static int palmas_smps_hex2volt(int hex, bool range)
+{
+ unsigned int uV = 0;
+
+ if (hex > PALMAS_SMPS_VOLT_MAX_HEX)
+ return -EINVAL;
+
+ if (hex < 0x7)
+ uV = 500000;
+ else
+ uV = 500000 + (hex - 0x6) * 10000;
+
+ if (range)
+ uV *= 2;
+
+ return uV;
+}
+
+static int palmas_smps_val(struct udevice *dev, int op, int *uV)
+{
+ unsigned int hex, adr;
+ u8 val;
+ int ret;
+ bool range;
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ if (op == PMIC_OP_GET)
+ *uV = 0;
+
+ adr = uc_pdata->volt_reg;
+
+ ret = dm_i2c_u8_read(dev->parent, adr, &val);
+ if (ret)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ if (val & PALMAS_SMPS_RANGE_MASK)
+ range = true;
+ else
+ range = false;
+
+ val &= PALMAS_SMPS_VOLT_MASK;
+ ret = palmas_smps_hex2volt(val, range);
+ if (ret < 0)
+ return ret;
+ *uV = ret;
+
+ return 0;
+ }
+
+ hex = palmas_smps_volt2hex(*uV);
+ if (hex < 0)
+ return hex;
+
+ val &= ~PALMAS_SMPS_VOLT_MASK;
+ val |= hex;
+ if (*uV > 1650000)
+ val |= PALMAS_SMPS_RANGE_MASK;
+
+ return dm_i2c_u8_write(dev->parent, adr, &val);
+}
+
+static int palmas_ldo_enable(struct udevice *dev, int op, bool *enable)
+{
+ int ret;
+ uint8_t val;
+ unsigned int adr;
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+ adr = uc_pdata->ctrl_reg;
+
+ ret = dm_i2c_u8_read(dev->parent, adr, &val);
+ if (ret)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ val &= PALMAS_LDO_STATUS_MASK;
+
+ if (val)
+ *enable = true;
+ else
+ *enable = false;
+
+ return 0;
+ } else if (op == PMIC_OP_SET) {
+ if (*enable)
+ val |= PALMAS_LDO_MODE_MASK;
+ else
+ val &= ~(PALMAS_LDO_MODE_MASK);
+
+ ret = dm_i2c_u8_write(dev->parent, adr, &val);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int palmas_ldo_volt2hex(int uV)
+{
+ if (uV > PALMAS_LDO_VOLT_MAX)
+ return -EINVAL;
+
+ return (uV - 850000) / 50000;
+}
+
+static int palmas_ldo_hex2volt(int hex)
+{
+ if (hex > PALMAS_LDO_VOLT_MAX_HEX)
+ return -EINVAL;
+
+ if (!hex)
+ return 0;
+
+ return (hex * 50000) + 850000;
+}
+
+static int palmas_ldo_val(struct udevice *dev, int op, int *uV)
+{
+ unsigned int hex, adr;
+ u8 val;
+ int ret;
+
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ if (op == PMIC_OP_GET)
+ *uV = 0;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ adr = uc_pdata->volt_reg;
+
+ ret = dm_i2c_u8_read(dev->parent, adr, &val);
+ if (ret)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ val &= PALMAS_LDO_VOLT_MASK;
+ ret = palmas_ldo_hex2volt(val);
+ if (ret < 0)
+ return ret;
+ *uV = ret;
+ return 0;
+ }
+
+ hex = palmas_ldo_volt2hex(*uV);
+ if (hex < 0)
+ return hex;
+
+ val &= ~PALMAS_LDO_VOLT_MASK;
+ val |= hex;
+ if (*uV > 1650000)
+ val |= 0x80;
+
+ return dm_i2c_u8_write(dev->parent, adr, &val);
+}
+
+static int palmas_ldo_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ struct udevice *parent;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ parent = dev_get_parent(dev);
+ int type = dev_get_driver_data(parent);
+
+ uc_pdata->type = REGULATOR_TYPE_LDO;
+
+ if (dev->driver_data) {
+ u8 idx = dev->driver_data - 1;
+ uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][idx];
+ uc_pdata->volt_reg = palmas_ldo_volt[type][idx];
+ } else {
+ /* check for ldoln and ldousb cases */
+ if (!strcmp("ldoln", dev->name)) {
+ uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][9];
+ uc_pdata->volt_reg = palmas_ldo_volt[type][9];
+ } else if (!strcmp("ldousb", dev->name)) {
+ uc_pdata->ctrl_reg = palmas_ldo_ctrl[type][10];
+ uc_pdata->volt_reg = palmas_ldo_volt[type][10];
+ }
+ }
+
+ return 0;
+}
+
+static int ldo_get_value(struct udevice *dev)
+{
+ int uV;
+ int ret;
+
+ ret = palmas_ldo_val(dev, PMIC_OP_GET, &uV);
+ if (ret)
+ return ret;
+
+ return uV;
+}
+
+static int ldo_set_value(struct udevice *dev, int uV)
+{
+ return palmas_ldo_val(dev, PMIC_OP_SET, &uV);
+}
+
+static bool ldo_get_enable(struct udevice *dev)
+{
+ bool enable = false;
+ int ret;
+
+ ret = palmas_ldo_enable(dev, PMIC_OP_GET, &enable);
+ if (ret)
+ return ret;
+
+ return enable;
+}
+
+static int ldo_set_enable(struct udevice *dev, bool enable)
+{
+ return palmas_ldo_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static int palmas_smps_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ struct udevice *parent;
+ int idx;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+
+ parent = dev_get_parent(dev);
+ int type = dev_get_driver_data(parent);
+
+ uc_pdata->type = REGULATOR_TYPE_BUCK;
+
+ switch (type) {
+ case PALMAS:
+ case TPS659038:
+ switch (dev->driver_data) {
+ case 123:
+ case 12:
+ uc_pdata->ctrl_reg = palmas_smps_ctrl[type][0];
+ uc_pdata->volt_reg = palmas_smps_volt[type][0];
+ break;
+ case 3:
+ uc_pdata->ctrl_reg = palmas_smps_ctrl[type][1];
+ uc_pdata->volt_reg = palmas_smps_volt[type][1];
+ break;
+ case 45:
+ uc_pdata->ctrl_reg = palmas_smps_ctrl[type][2];
+ uc_pdata->volt_reg = palmas_smps_volt[type][2];
+ break;
+ case 6:
+ case 7:
+ case 8:
+ case 9:
+ case 10:
+ idx = dev->driver_data - 4;
+ uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
+ uc_pdata->volt_reg = palmas_smps_volt[type][idx];
+ break;
+
+ default:
+ printf("Wrong ID for regulator\n");
+ }
+ break;
+
+ case TPS65917:
+ switch (dev->driver_data) {
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ idx = dev->driver_data - 1;
+ uc_pdata->ctrl_reg = palmas_smps_ctrl[type][idx];
+ uc_pdata->volt_reg = palmas_smps_volt[type][idx];
+ break;
+
+ default:
+ printf("Wrong ID for regulator\n");
+ }
+ break;
+
+ default:
+ printf("Invalid PMIC ID\n");
+ }
+
+ return 0;
+}
+
+static int smps_get_value(struct udevice *dev)
+{
+ int uV;
+ int ret;
+
+ ret = palmas_smps_val(dev, PMIC_OP_GET, &uV);
+ if (ret)
+ return ret;
+
+ return uV;
+}
+
+static int smps_set_value(struct udevice *dev, int uV)
+{
+ return palmas_smps_val(dev, PMIC_OP_SET, &uV);
+}
+
+static bool smps_get_enable(struct udevice *dev)
+{
+ bool enable = false;
+ int ret;
+
+ ret = palmas_smps_enable(dev, PMIC_OP_GET, &enable);
+ if (ret)
+ return ret;
+
+ return enable;
+}
+
+static int smps_set_enable(struct udevice *dev, bool enable)
+{
+ return palmas_smps_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static const struct dm_regulator_ops palmas_ldo_ops = {
+ .get_value = ldo_get_value,
+ .set_value = ldo_set_value,
+ .get_enable = ldo_get_enable,
+ .set_enable = ldo_set_enable,
+};
+
+U_BOOT_DRIVER(palmas_ldo) = {
+ .name = PALMAS_LDO_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &palmas_ldo_ops,
+ .probe = palmas_ldo_probe,
+};
+
+static const struct dm_regulator_ops palmas_smps_ops = {
+ .get_value = smps_get_value,
+ .set_value = smps_set_value,
+ .get_enable = smps_get_enable,
+ .set_enable = smps_set_enable,
+};
+
+U_BOOT_DRIVER(palmas_smps) = {
+ .name = PALMAS_SMPS_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &palmas_smps_ops,
+ .probe = palmas_smps_probe,
+};
--
1.9.1
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