[U-Boot] [PATCH v3 06/18] power: regulator: tps65941: add regulator support
Keerthy
j-keerthy at ti.com
Thu Oct 24 09:30:51 UTC 2019
The driver provides regulator set/get voltage
enable/disable functions for tps65941 family of PMICs.
Signed-off-by: Keerthy <j-keerthy at ti.com>
---
Changes in v3:
* No change
Changes in v2:
* No change
drivers/power/regulator/Kconfig | 10 +
drivers/power/regulator/Makefile | 1 +
drivers/power/regulator/tps65941_regulator.c | 407 +++++++++++++++++++
3 files changed, 418 insertions(+)
create mode 100644 drivers/power/regulator/tps65941_regulator.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 56d68ee40e..25fc787a29 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -323,3 +323,13 @@ config SPL_DM_REGULATOR_LP873X
This enables implementation of driver-model regulator uclass
features for REGULATOR LP873X and the family of LP873X PMICs.
The driver implements get/set api for: value and enable in SPL.
+
+config DM_REGULATOR_TPS65941
+ bool "Enable driver for TPS65941 PMIC regulators"
+ depends on PMIC_TPS65941
+ help
+ This enables implementation of driver-model regulator uclass
+ features for REGULATOR TPS65941 and the family of TPS65941 PMICs.
+ TPS65941 series of PMICs have 5 single phase BUCKs that can also
+ be configured in multi phase modes & 4 LDOs. The driver implements
+ get/set api for value and enable.
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index 9198841b4f..b611c901ba 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -28,3 +28,4 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o
obj-$(CONFIG_DM_REGULATOR_TPS65910) += tps65910_regulator.o
obj-$(CONFIG_DM_REGULATOR_TPS62360) += tps62360_regulator.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_STPMIC1) += stpmic1.o
+obj-$(CONFIG_DM_REGULATOR_TPS65941) += tps65941_regulator.o
diff --git a/drivers/power/regulator/tps65941_regulator.c b/drivers/power/regulator/tps65941_regulator.c
new file mode 100644
index 0000000000..a00ef58129
--- /dev/null
+++ b/drivers/power/regulator/tps65941_regulator.c
@@ -0,0 +1,407 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2019
+ * Texas Instruments Incorporated, <www.ti.com>
+ *
+ * Keerthy <j-keerthy at ti.com>
+ */
+
+#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/tps65941.h>
+
+static const char tps65941_buck_ctrl[TPS65941_BUCK_NUM] = {0x4, 0x6, 0x8, 0xA,
+ 0xC};
+static const char tps65941_buck_vout[TPS65941_BUCK_NUM] = {0xE, 0x10, 0x12,
+ 0x14, 0x16};
+static const char tps65941_ldo_ctrl[TPS65941_BUCK_NUM] = {0x1D, 0x1E, 0x1F,
+ 0x20};
+static const char tps65941_ldo_vout[TPS65941_BUCK_NUM] = {0x23, 0x24, 0x25,
+ 0x26};
+
+static int tps65941_buck_enable(struct udevice *dev, int op, bool *enable)
+{
+ int ret;
+ unsigned int adr;
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+ adr = uc_pdata->ctrl_reg;
+
+ ret = pmic_reg_read(dev->parent, adr);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ ret &= TPS65941_BUCK_MODE_MASK;
+
+ if (ret)
+ *enable = true;
+ else
+ *enable = false;
+
+ return 0;
+ } else if (op == PMIC_OP_SET) {
+ if (*enable)
+ ret |= TPS65941_BUCK_MODE_MASK;
+ else
+ ret &= ~TPS65941_BUCK_MODE_MASK;
+ ret = pmic_reg_write(dev->parent, adr, ret);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tps65941_buck_volt2val(int uV)
+{
+ if (uV > TPS65941_BUCK_VOLT_MAX)
+ return -EINVAL;
+ else if (uV > 1650000)
+ return (uV - 1660000) / 20000 + 0xAB;
+ else if (uV > 1110000)
+ return (uV - 1110000) / 10000 + 0x73;
+ else if (uV > 600000)
+ return (uV - 600000) / 5000 + 0x0F;
+ else if (uV >= 300000)
+ return (uV - 300000) / 20000 + 0x00;
+ else
+ return -EINVAL;
+}
+
+static int tps65941_buck_val2volt(int val)
+{
+ if (val > TPS65941_BUCK_VOLT_MAX_HEX)
+ return -EINVAL;
+ else if (val > 0xAB)
+ return 1660000 + (val - 0xAB) * 20000;
+ else if (val > 0x73)
+ return 1100000 + (val - 0x73) * 10000;
+ else if (val > 0xF)
+ return 600000 + (val - 0xF) * 5000;
+ else if (val >= 0x0)
+ return 300000 + val * 5000;
+ else
+ return -EINVAL;
+}
+
+int tps65941_lookup_slew(int id)
+{
+ switch (id) {
+ case 0:
+ return 33000;
+ case 1:
+ return 20000;
+ case 2:
+ return 10000;
+ case 3:
+ return 5000;
+ case 4:
+ return 2500;
+ case 5:
+ return 1300;
+ case 6:
+ return 630;
+ case 7:
+ return 310;
+ default:
+ return -1;
+ }
+}
+
+static int tps65941_buck_val(struct udevice *dev, int op, int *uV)
+{
+ unsigned int hex, adr;
+ int ret, delta, uwait, slew;
+ 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 = pmic_reg_read(dev->parent, adr);
+ if (ret < 0)
+ return ret;
+
+ ret &= TPS65941_BUCK_VOLT_MASK;
+ ret = tps65941_buck_val2volt(ret);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ *uV = ret;
+ return 0;
+ }
+
+ /*
+ * Compute the delta voltage, find the slew rate and wait
+ * for the appropriate amount of time after voltage switch
+ */
+ if (*uV > ret)
+ delta = *uV - ret;
+ else
+ delta = ret - *uV;
+
+ slew = pmic_reg_read(dev->parent, uc_pdata->ctrl_reg + 1);
+ if (slew < 0)
+ return ret;
+
+ slew &= TP65941_BUCK_CONF_SLEW_MASK;
+ slew = tps65941_lookup_slew(slew);
+ if (slew <= 0)
+ return ret;
+
+ uwait = delta / slew;
+
+ hex = tps65941_buck_volt2val(*uV);
+ if (hex < 0)
+ return hex;
+
+ ret &= 0x0;
+ ret = hex;
+
+ ret = pmic_reg_write(dev->parent, adr, ret);
+
+ udelay(uwait);
+
+ return ret;
+}
+
+static int tps65941_ldo_enable(struct udevice *dev, int op, bool *enable)
+{
+ int ret;
+ unsigned int adr;
+ struct dm_regulator_uclass_platdata *uc_pdata;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+ adr = uc_pdata->ctrl_reg;
+
+ ret = pmic_reg_read(dev->parent, adr);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ ret &= TPS65941_LDO_MODE_MASK;
+
+ if (ret)
+ *enable = true;
+ else
+ *enable = false;
+
+ return 0;
+ } else if (op == PMIC_OP_SET) {
+ if (*enable)
+ ret |= TPS65941_LDO_MODE_MASK;
+ else
+ ret &= ~TPS65941_LDO_MODE_MASK;
+ ret = pmic_reg_write(dev->parent, adr, ret);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tps65941_ldo_val2volt(int val)
+{
+ if (val > TPS65941_LDO_VOLT_MAX_HEX || val < TPS65941_LDO_VOLT_MIN_HEX)
+ return -EINVAL;
+ else if (val >= TPS65941_LDO_VOLT_MIN_HEX)
+ return 600000 + (val - TPS65941_LDO_VOLT_MIN_HEX) * 50000;
+ else
+ return -EINVAL;
+}
+
+static int tps65941_ldo_val(struct udevice *dev, int op, int *uV)
+{
+ unsigned int hex, adr;
+ int ret;
+ 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 = pmic_reg_read(dev->parent, adr);
+ if (ret < 0)
+ return ret;
+
+ ret &= TPS65941_LDO_VOLT_MASK;
+ ret = tps65941_ldo_val2volt(ret);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ *uV = ret;
+ return 0;
+ }
+
+ hex = tps65941_buck_volt2val(*uV);
+ if (hex < 0)
+ return hex;
+
+ ret &= 0x0;
+ ret = hex;
+
+ ret = pmic_reg_write(dev->parent, adr, ret);
+
+ return ret;
+}
+
+static int tps65941_ldo_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ int idx;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+ uc_pdata->type = REGULATOR_TYPE_LDO;
+
+ idx = dev->driver_data;
+ if (idx == 1 || idx == 2 || idx == 3 || idx == 4) {
+ debug("Single phase regulator\n");
+ } else {
+ printf("Wrong ID for regulator\n");
+ return -EINVAL;
+ }
+
+ uc_pdata->ctrl_reg = tps65941_ldo_ctrl[idx - 1];
+ uc_pdata->volt_reg = tps65941_ldo_vout[idx - 1];
+
+ return 0;
+}
+
+static int tps65941_buck_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_platdata *uc_pdata;
+ int idx;
+
+ uc_pdata = dev_get_uclass_platdata(dev);
+ uc_pdata->type = REGULATOR_TYPE_BUCK;
+
+ idx = dev->driver_data;
+ if (idx == 1 || idx == 2 || idx == 3 || idx == 4 || idx == 5) {
+ debug("Single phase regulator\n");
+ } else if (idx == 12) {
+ idx = 1;
+ } else if (idx == 34) {
+ idx = 3;
+ } else if (idx == 1234) {
+ idx = 1;
+ } else {
+ printf("Wrong ID for regulator\n");
+ return -EINVAL;
+ }
+
+ uc_pdata->ctrl_reg = tps65941_buck_ctrl[idx - 1];
+ uc_pdata->volt_reg = tps65941_buck_vout[idx - 1];
+
+ return 0;
+}
+
+static int ldo_get_value(struct udevice *dev)
+{
+ int uV;
+ int ret;
+
+ ret = tps65941_ldo_val(dev, PMIC_OP_GET, &uV);
+ if (ret)
+ return ret;
+
+ return uV;
+}
+
+static int ldo_set_value(struct udevice *dev, int uV)
+{
+ return tps65941_ldo_val(dev, PMIC_OP_SET, &uV);
+}
+
+static int ldo_get_enable(struct udevice *dev)
+{
+ bool enable = false;
+ int ret;
+
+ ret = tps65941_ldo_enable(dev, PMIC_OP_GET, &enable);
+ if (ret)
+ return ret;
+
+ return enable;
+}
+
+static int ldo_set_enable(struct udevice *dev, bool enable)
+{
+ return tps65941_ldo_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static int buck_get_value(struct udevice *dev)
+{
+ int uV;
+ int ret;
+
+ ret = tps65941_buck_val(dev, PMIC_OP_GET, &uV);
+ if (ret)
+ return ret;
+
+ return uV;
+}
+
+static int buck_set_value(struct udevice *dev, int uV)
+{
+ return tps65941_buck_val(dev, PMIC_OP_SET, &uV);
+}
+
+static int buck_get_enable(struct udevice *dev)
+{
+ bool enable = false;
+ int ret;
+
+ ret = tps65941_buck_enable(dev, PMIC_OP_GET, &enable);
+ if (ret)
+ return ret;
+
+ return enable;
+}
+
+static int buck_set_enable(struct udevice *dev, bool enable)
+{
+ return tps65941_buck_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static const struct dm_regulator_ops tps65941_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(tps65941_ldo) = {
+ .name = TPS65941_LDO_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &tps65941_ldo_ops,
+ .probe = tps65941_ldo_probe,
+};
+
+static const struct dm_regulator_ops tps65941_buck_ops = {
+ .get_value = buck_get_value,
+ .set_value = buck_set_value,
+ .get_enable = buck_get_enable,
+ .set_enable = buck_set_enable,
+};
+
+U_BOOT_DRIVER(tps65941_buck) = {
+ .name = TPS65941_BUCK_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &tps65941_buck_ops,
+ .probe = tps65941_buck_probe,
+};
--
2.17.1
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