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Subject[PATCH V2 4/5] regulator: as3722: add regulator driver for AMS AS3722
Date
The AMS AS3722 is a compact system PMU suitable for mobile phones,
tablets etc. It has 4 DCDC step down regulators, 3 DCDC step down
controller, 11 LDOs.

Add a driver to support accessing the DCDC/LDOs found on the AMS
AS3722 PMIC using regulators.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Florian Lobmaier <florian.lobmaier@ams.com>
---
Changes from V1:
- Add code to get regulator node handle.
- Nit cleanups in driver and use module_platform_driver.
- Use linear_range and added regulator_map_* on regulators.
- Move OC configuration to regulator_current limit setting.

.../bindings/regulator/as3722-regulator.txt | 91 ++
drivers/regulator/Kconfig | 8 +
drivers/regulator/Makefile | 1 +
drivers/regulator/as3722-regulator.c | 917 ++++++++++++++++++++
4 files changed, 1017 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/as3722-regulator.txt
create mode 100644 drivers/regulator/as3722-regulator.c

diff --git a/Documentation/devicetree/bindings/regulator/as3722-regulator.txt b/Documentation/devicetree/bindings/regulator/as3722-regulator.txt
new file mode 100644
index 0000000..caad0c8
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/as3722-regulator.txt
@@ -0,0 +1,91 @@
+Regulator of AMS AS3722 PMIC.
+Name of the regulator subnode must be "regulators".
+
+Optional properties:
+--------------------
+The input supply of regulators are the optional properties on the
+regulator node. The AS3722 is having 7 DCDC step-down regulators as
+sd[0-6], 10 LDOs as ldo[0-7], ldo[9-11]. The input supply of these
+regulators are provided through following properties:
+vsup-sd2-supply: Input supply for SD2.
+vsup-sd3-supply: Input supply for SD3.
+vsup-sd4-supply: Input supply for SD4.
+vsup-sd5-supply: Input supply for SD5.
+vin-ldo0-supply: Input supply for LDO0.
+vin-ldo1-6-supply: Input supply for LDO1 and LDO6.
+vin-ldo2-5-7-supply: Input supply for LDO2, LDO5 and LDO7.
+vin-ldo3-4-supply: Input supply for LDO3 and LDO4.
+vin-ldo9-10-supply: Input supply for LDO9 and LDO10.
+vin-ldo11-supply: Input supply for LDO11.
+
+Optional nodes:
+--------------
+- regulators : Must contain a sub-node per regulator from the list below.
+ Each sub-node should contain the constraints and initialization
+ information for that regulator. See regulator.txt for a
+ description of standard properties for these sub-nodes.
+ Additional custom properties are listed below.
+ sd[0-6], ldo[0-7], ldo[9-11].
+
+ Optional sub-node properties:
+ ----------------------------
+ ams,ext-control: External control of the rail. The option of
+ this properties will tell which external input is
+ controlling this rail. Valid values are 0, 1, 2 ad 3.
+ 0: There is no external control of this rail.
+ 1: Rail is controlled by ENABLE1 input pin.
+ 2: Rail is controlled by ENABLE2 input pin.
+ 3: Rail is controlled by ENABLE3 input pin.
+ ams,enable-tracking: Enable tracking with SD1, only supported
+ by LDO3.
+
+Example:
+-------
+ ams3722: ams3722 {
+ compatible = "ams,as3722";
+ reg = <0x40>;
+ ...
+
+ regulators {
+ vsup-sd2-supply = <...>;
+ ...
+
+ sd0 {
+ regulator-name = "vdd_cpu";
+ regulator-min-microvolt = <700000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ ams,ext-control = <2>;
+ };
+
+ sd1 {
+ regulator-name = "vdd_core";
+ regulator-min-microvolt = <700000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-always-on;
+ ams,ext-control = <1>;
+ };
+
+ sd2 {
+ regulator-name = "vddio_ddr";
+ regulator-min-microvolt = <1350000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-always-on;
+ };
+
+ sd4 {
+ regulator-name = "avdd-hdmi-pex";
+ regulator-min-microvolt = <1050000>;
+ regulator-max-microvolt = <1050000>;
+ regulator-always-on;
+ };
+
+ sd5 {
+ regulator-name = "vdd-1v8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+ ....
+ };
+ };
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 1100205..ce785f4 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -123,6 +123,14 @@ config REGULATOR_AS3711
This driver provides support for the voltage regulators on the
AS3711 PMIC

+config REGULATOR_AS3722
+ tristate "AMS AS3722 PMIC Regulators"
+ depends on MFD_AS3722
+ help
+ This driver provides support for the voltage regulators on the
+ AS3722 PMIC. This will enable support for all the software
+ controllable DCDC/LDO regulators.
+
config REGULATOR_DA903X
tristate "Dialog Semiconductor DA9030/DA9034 regulators"
depends on PMIC_DA903X
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index c328e08..01c597e 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o
obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o
obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o
obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o
+obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o
obj-$(CONFIG_REGULATOR_DA9055) += da9055-regulator.o
diff --git a/drivers/regulator/as3722-regulator.c b/drivers/regulator/as3722-regulator.c
new file mode 100644
index 0000000..16a5d26
--- /dev/null
+++ b/drivers/regulator/as3722-regulator.c
@@ -0,0 +1,917 @@
+/*
+ * Voltage regulator support for AMS AS3722 PMIC
+ *
+ * Copyright (C) 2013 ams
+ *
+ * Author: Florian Lobmaier <florian.lobmaier@ams.com>
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/as3722.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/slab.h>
+
+/* Regulator IDs */
+enum as3722_regulators_id {
+ AS3722_REGULATOR_ID_SD0,
+ AS3722_REGULATOR_ID_SD1,
+ AS3722_REGULATOR_ID_SD2,
+ AS3722_REGULATOR_ID_SD3,
+ AS3722_REGULATOR_ID_SD4,
+ AS3722_REGULATOR_ID_SD5,
+ AS3722_REGULATOR_ID_SD6,
+ AS3722_REGULATOR_ID_LDO0,
+ AS3722_REGULATOR_ID_LDO1,
+ AS3722_REGULATOR_ID_LDO2,
+ AS3722_REGULATOR_ID_LDO3,
+ AS3722_REGULATOR_ID_LDO4,
+ AS3722_REGULATOR_ID_LDO5,
+ AS3722_REGULATOR_ID_LDO6,
+ AS3722_REGULATOR_ID_LDO7,
+ AS3722_REGULATOR_ID_LDO9,
+ AS3722_REGULATOR_ID_LDO10,
+ AS3722_REGULATOR_ID_LDO11,
+ AS3722_REGULATOR_ID_MAX,
+};
+
+struct as3722_register_mapping {
+ u8 regulator_id;
+ const char *name;
+ const char *sname;
+ u8 vsel_reg;
+ u8 vsel_mask;
+ int n_voltages;
+ u32 enable_reg;
+ u8 enable_mask;
+ u32 control_reg;
+ u8 mode_mask;
+ u32 sleep_ctrl_reg;
+ u8 sleep_ctrl_mask;
+};
+
+struct as3722_regulator_config_data {
+ struct regulator_init_data *reg_init;
+ bool enable_tracking;
+ int ext_control;
+};
+
+struct as3722_regulators {
+ struct device *dev;
+ struct as3722 *as3722;
+ struct regulator_dev *rdevs[AS3722_REGULATOR_ID_MAX];
+ struct regulator_desc desc[AS3722_REGULATOR_ID_MAX];
+ struct as3722_regulator_config_data
+ reg_config_data[AS3722_REGULATOR_ID_MAX];
+};
+
+static const struct as3722_register_mapping as3722_reg_lookup[] = {
+ {
+ .regulator_id = AS3722_REGULATOR_ID_SD0,
+ .name = "as3722-sd0",
+ .vsel_reg = AS3722_SD0_VOLTAGE_REG,
+ .vsel_mask = AS3722_SD_VSEL_MASK,
+ .enable_reg = AS3722_SD_CONTROL_REG,
+ .enable_mask = AS3722_SDn_CTRL(0),
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
+ .sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK,
+ .control_reg = AS3722_SD0_CONTROL_REG,
+ .mode_mask = AS3722_SD0_MODE_FAST,
+ .n_voltages = AS3722_SD0_VSEL_MAX,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_SD1,
+ .name = "as3722-sd1",
+ .vsel_reg = AS3722_SD1_VOLTAGE_REG,
+ .vsel_mask = AS3722_SD_VSEL_MASK,
+ .enable_reg = AS3722_SD_CONTROL_REG,
+ .enable_mask = AS3722_SDn_CTRL(1),
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
+ .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
+ .control_reg = AS3722_SD1_CONTROL_REG,
+ .mode_mask = AS3722_SD1_MODE_FAST,
+ .n_voltages = AS3722_SD0_VSEL_MAX,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_SD2,
+ .name = "as3722-sd2",
+ .sname = "vsup-sd2",
+ .vsel_reg = AS3722_SD2_VOLTAGE_REG,
+ .vsel_mask = AS3722_SD_VSEL_MASK,
+ .enable_reg = AS3722_SD_CONTROL_REG,
+ .enable_mask = AS3722_SDn_CTRL(2),
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
+ .sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
+ .control_reg = AS3722_SD23_CONTROL_REG,
+ .mode_mask = AS3722_SD2_MODE_FAST,
+ .n_voltages = AS3722_SD2_VSEL_MAX,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_SD3,
+ .name = "as3722-sd3",
+ .sname = "vsup-sd3",
+ .vsel_reg = AS3722_SD3_VOLTAGE_REG,
+ .vsel_mask = AS3722_SD_VSEL_MASK,
+ .enable_reg = AS3722_SD_CONTROL_REG,
+ .enable_mask = AS3722_SDn_CTRL(3),
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
+ .sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
+ .control_reg = AS3722_SD23_CONTROL_REG,
+ .mode_mask = AS3722_SD3_MODE_FAST,
+ .n_voltages = AS3722_SD2_VSEL_MAX,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_SD4,
+ .name = "as3722-sd4",
+ .sname = "vsup-sd4",
+ .vsel_reg = AS3722_SD4_VOLTAGE_REG,
+ .vsel_mask = AS3722_SD_VSEL_MASK,
+ .enable_reg = AS3722_SD_CONTROL_REG,
+ .enable_mask = AS3722_SDn_CTRL(4),
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
+ .sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
+ .control_reg = AS3722_SD4_CONTROL_REG,
+ .mode_mask = AS3722_SD4_MODE_FAST,
+ .n_voltages = AS3722_SD2_VSEL_MAX,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_SD5,
+ .name = "as3722-sd5",
+ .sname = "vsup-sd5",
+ .vsel_reg = AS3722_SD5_VOLTAGE_REG,
+ .vsel_mask = AS3722_SD_VSEL_MASK,
+ .enable_reg = AS3722_SD_CONTROL_REG,
+ .enable_mask = AS3722_SDn_CTRL(5),
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
+ .sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
+ .control_reg = AS3722_SD5_CONTROL_REG,
+ .mode_mask = AS3722_SD5_MODE_FAST,
+ .n_voltages = AS3722_SD2_VSEL_MAX,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_SD6,
+ .name = "as3722-sd6",
+ .vsel_reg = AS3722_SD6_VOLTAGE_REG,
+ .vsel_mask = AS3722_SD_VSEL_MASK,
+ .enable_reg = AS3722_SD_CONTROL_REG,
+ .enable_mask = AS3722_SDn_CTRL(6),
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
+ .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
+ .control_reg = AS3722_SD6_CONTROL_REG,
+ .mode_mask = AS3722_SD6_MODE_FAST,
+ .n_voltages = AS3722_SD0_VSEL_MAX,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO0,
+ .name = "as3722-ldo0",
+ .sname = "vin-ldo0",
+ .vsel_reg = AS3722_LDO0_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO0_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO0_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
+ .sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO0_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO1,
+ .name = "as3722-ldo1",
+ .sname = "vin-ldo1-6",
+ .vsel_reg = AS3722_LDO1_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO1_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
+ .sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO2,
+ .name = "as3722-ldo2",
+ .sname = "vin-ldo2-5-7",
+ .vsel_reg = AS3722_LDO2_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO2_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
+ .sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO3,
+ .name = "as3722-ldo3",
+ .name = "vin-ldo3-4",
+ .vsel_reg = AS3722_LDO3_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO3_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO3_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
+ .sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO3_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO4,
+ .name = "as3722-ldo4",
+ .name = "vin-ldo3-4",
+ .vsel_reg = AS3722_LDO4_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO4_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
+ .sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO5,
+ .name = "as3722-ldo5",
+ .sname = "vin-ldo2-5-7",
+ .vsel_reg = AS3722_LDO5_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO5_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
+ .sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO6,
+ .name = "as3722-ldo6",
+ .sname = "vin-ldo1-6",
+ .vsel_reg = AS3722_LDO6_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO6_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
+ .sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO7,
+ .name = "as3722-ldo7",
+ .sname = "vin-ldo2-5-7",
+ .vsel_reg = AS3722_LDO7_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL0_REG,
+ .enable_mask = AS3722_LDO7_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
+ .sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO9,
+ .name = "as3722-ldo9",
+ .sname = "vin-ldo9-10",
+ .vsel_reg = AS3722_LDO9_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL1_REG,
+ .enable_mask = AS3722_LDO9_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
+ .sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO10,
+ .name = "as3722-ldo10",
+ .sname = "vin-ldo9-10",
+ .vsel_reg = AS3722_LDO10_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL1_REG,
+ .enable_mask = AS3722_LDO10_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
+ .sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+ {
+ .regulator_id = AS3722_REGULATOR_ID_LDO11,
+ .name = "as3722-ldo11",
+ .sname = "vin-ldo11",
+ .vsel_reg = AS3722_LDO11_VOLTAGE_REG,
+ .vsel_mask = AS3722_LDO_VSEL_MASK,
+ .enable_reg = AS3722_LDOCONTROL1_REG,
+ .enable_mask = AS3722_LDO11_CTRL,
+ .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
+ .sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
+ .n_voltages = AS3722_LDO_NUM_VOLT,
+ },
+};
+
+
+static const int as3722_ldo_current[] = { 150000, 300000 };
+static const int as3722_sd016_current[] = { 2500000, 3000000, 3500000 };
+
+static int as3722_current_to_index(int min_uA, int max_uA,
+ const int *curr_table, int n_currents)
+{
+ int i;
+
+ for (i = n_currents - 1; i >= 0; i--) {
+ if ((min_uA <= curr_table[i]) && (curr_table[i] <= max_uA))
+ return i;
+ }
+ return -EINVAL;
+}
+
+static int as3722_ldo_get_current_limit(struct regulator_dev *rdev)
+{
+ struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
+ struct as3722 *as3722 = as3722_regs->as3722;
+ int id = rdev_get_id(rdev);
+ u32 val;
+ int ret;
+
+ ret = as3722_read(as3722, as3722_reg_lookup[id].vsel_reg, &val);
+ if (ret < 0) {
+ dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
+ as3722_reg_lookup[id].vsel_reg, ret);
+ return ret;
+ }
+ if (val & AS3722_LDO_ILIMIT_MASK)
+ return 300000;
+ return 150000;
+}
+
+static int as3722_ldo_set_current_limit(struct regulator_dev *rdev,
+ int min_uA, int max_uA)
+{
+ struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
+ struct as3722 *as3722 = as3722_regs->as3722;
+ int id = rdev_get_id(rdev);
+ int ret;
+ u32 reg = 0;
+
+ ret = as3722_current_to_index(min_uA, max_uA, as3722_ldo_current,
+ ARRAY_SIZE(as3722_ldo_current));
+ if (ret < 0) {
+ dev_err(as3722_regs->dev,
+ "Current range min:max = %d:%d does not support\n",
+ min_uA, max_uA);
+ return ret;
+ }
+ if (ret)
+ reg = AS3722_LDO_ILIMIT_BIT;
+ return as3722_update_bits(as3722, as3722_reg_lookup[id].vsel_reg,
+ AS3722_LDO_ILIMIT_MASK, reg);
+}
+
+static struct regulator_ops as3722_ldo0_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_current_limit = as3722_ldo_get_current_limit,
+ .set_current_limit = as3722_ldo_set_current_limit,
+};
+
+static struct regulator_ops as3722_ldo0_extcntrl_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_current_limit = as3722_ldo_get_current_limit,
+ .set_current_limit = as3722_ldo_set_current_limit,
+};
+
+static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
+ int id, u8 mode)
+{
+ struct as3722 *as3722 = as3722_reg->as3722;
+
+ switch (mode) {
+ case AS3722_LDO3_MODE_PMOS:
+ case AS3722_LDO3_MODE_PMOS_TRACKING:
+ case AS3722_LDO3_MODE_NMOS:
+ case AS3722_LDO3_MODE_SWITCH:
+ return as3722_update_bits(as3722,
+ as3722_reg_lookup[id].vsel_reg,
+ AS3722_LDO3_MODE_MASK, mode);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
+{
+ return 150000;
+}
+
+static struct regulator_ops as3722_ldo3_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_current_limit = as3722_ldo3_get_current_limit,
+};
+
+static struct regulator_ops as3722_ldo3_extcntrl_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_current_limit = as3722_ldo3_get_current_limit,
+};
+
+#define regulator_lin_range(_min_sel, _max_sel, _min_uV, _step_uV) \
+ { \
+ .min_sel = _min_sel, \
+ .max_sel = _max_sel, \
+ .uV_step = _step_uV, \
+ .min_uV = _min_uV, \
+ .max_uV = _min_uV + (_max_sel - _min_sel + 1) * _step_uV, \
+ }
+
+static const struct regulator_linear_range as3722_ldo_ranges[] = {
+ regulator_lin_range(0x01, 0x24, 800000, 25000),
+ regulator_lin_range(0x40, 0x7F, 1725000, 25000),
+};
+
+static struct regulator_ops as3722_ldo_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .get_current_limit = as3722_ldo_get_current_limit,
+ .set_current_limit = as3722_ldo_set_current_limit,
+};
+
+static struct regulator_ops as3722_ldo_extcntrl_ops = {
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .get_current_limit = as3722_ldo_get_current_limit,
+ .set_current_limit = as3722_ldo_set_current_limit,
+};
+
+static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
+{
+ struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
+ struct as3722 *as3722 = as3722_regs->as3722;
+ int id = rdev_get_id(rdev);
+ u32 val;
+ int ret;
+
+ if (!as3722_reg_lookup[id].control_reg)
+ return -ENOTSUPP;
+
+ ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
+ if (ret < 0) {
+ dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
+ as3722_reg_lookup[id].control_reg, ret);
+ return ret;
+ }
+
+ if (val & as3722_reg_lookup[id].mode_mask)
+ return REGULATOR_MODE_FAST;
+ else
+ return REGULATOR_MODE_NORMAL;
+}
+
+static int as3722_sd_set_mode(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
+ struct as3722 *as3722 = as3722_regs->as3722;
+ u8 id = rdev_get_id(rdev);
+ u8 val = 0;
+ int ret;
+
+ if (!as3722_reg_lookup[id].control_reg)
+ return -ERANGE;
+
+ switch (mode) {
+ case REGULATOR_MODE_FAST:
+ val = as3722_reg_lookup[id].mode_mask;
+ case REGULATOR_MODE_NORMAL: /* fall down */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
+ as3722_reg_lookup[id].mode_mask, val);
+ if (ret < 0) {
+ dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
+ as3722_reg_lookup[id].control_reg, ret);
+ return ret;
+ }
+ return ret;
+}
+
+static int as3722_sd016_get_current_limit(struct regulator_dev *rdev)
+{
+ struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
+ struct as3722 *as3722 = as3722_regs->as3722;
+ int id = rdev_get_id(rdev);
+ u32 val, reg;
+ int mask;
+ int ret;
+
+ switch (id) {
+ case AS3722_REGULATOR_ID_SD0:
+ reg = AS3722_OVCURRENT_REG;
+ mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
+ break;
+ case AS3722_REGULATOR_ID_SD1:
+ reg = AS3722_OVCURRENT_REG;
+ mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
+ break;
+ case AS3722_REGULATOR_ID_SD6:
+ reg = AS3722_OVCURRENT_DEB_REG;
+ mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+ ret = as3722_read(as3722, reg, &val);
+ if (ret < 0) {
+ dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
+ reg, ret);
+ return ret;
+ }
+ val &= mask;
+ val >>= ffs(mask) - 1;
+ if (val == 3)
+ return -EINVAL;
+ return as3722_sd016_current[val];
+}
+
+static int as3722_sd016_set_current_limit(struct regulator_dev *rdev,
+ int min_uA, int max_uA)
+{
+ struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
+ struct as3722 *as3722 = as3722_regs->as3722;
+ int id = rdev_get_id(rdev);
+ int ret;
+ int val;
+ int mask;
+ u32 reg;
+
+ ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current,
+ ARRAY_SIZE(as3722_sd016_current));
+ if (ret < 0) {
+ dev_err(as3722_regs->dev,
+ "Current range min:max = %d:%d does not support\n",
+ min_uA, max_uA);
+ return ret;
+ }
+
+ switch (id) {
+ case AS3722_REGULATOR_ID_SD0:
+ reg = AS3722_OVCURRENT_REG;
+ mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
+ break;
+ case AS3722_REGULATOR_ID_SD1:
+ reg = AS3722_OVCURRENT_REG;
+ mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
+ break;
+ case AS3722_REGULATOR_ID_SD6:
+ reg = AS3722_OVCURRENT_DEB_REG;
+ mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+ val = ret & mask;
+ val <<= ffs(mask) - 1;
+ return as3722_update_bits(as3722, reg, mask, val);
+}
+
+static const struct regulator_linear_range as3722_sd2345_ranges[] = {
+ regulator_lin_range(0x01, 0x40, 600000, 12500),
+ regulator_lin_range(0x41, 0x70, 1400000, 25000),
+ regulator_lin_range(0x71, 0x7F, 1725000, 50000),
+};
+
+static struct regulator_ops as3722_sd016_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_current_limit = as3722_sd016_get_current_limit,
+ .set_current_limit = as3722_sd016_set_current_limit,
+ .get_mode = as3722_sd_get_mode,
+ .set_mode = as3722_sd_set_mode,
+};
+
+static struct regulator_ops as3722_sd016_extcntrl_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_current_limit = as3722_sd016_get_current_limit,
+ .set_current_limit = as3722_sd016_set_current_limit,
+ .get_mode = as3722_sd_get_mode,
+ .set_mode = as3722_sd_set_mode,
+};
+
+static struct regulator_ops as3722_sd2345_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .get_mode = as3722_sd_get_mode,
+ .set_mode = as3722_sd_set_mode,
+};
+
+static struct regulator_ops as3722_sd2345_extcntrl_ops = {
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_linear_range,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .get_mode = as3722_sd_get_mode,
+ .set_mode = as3722_sd_set_mode,
+};
+
+static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
+ int ext_pwr_ctrl)
+{
+ int ret;
+ unsigned int val;
+
+ if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
+ (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
+ return -EINVAL;
+
+ val = ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
+ ret = as3722_update_bits(as3722_regs->as3722,
+ as3722_reg_lookup[id].sleep_ctrl_reg,
+ as3722_reg_lookup[id].sleep_ctrl_mask, val);
+ if (ret < 0)
+ dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
+ as3722_reg_lookup[id].sleep_ctrl_reg, ret);
+ return ret;
+}
+
+static struct of_regulator_match as3722_regulator_matches[] = {
+ { .name = "sd0", },
+ { .name = "sd1", },
+ { .name = "sd2", },
+ { .name = "sd3", },
+ { .name = "sd4", },
+ { .name = "sd5", },
+ { .name = "sd6", },
+ { .name = "ldo0", },
+ { .name = "ldo1", },
+ { .name = "ldo2", },
+ { .name = "ldo3", },
+ { .name = "ldo4", },
+ { .name = "ldo5", },
+ { .name = "ldo6", },
+ { .name = "ldo7", },
+ { .name = "ldo9", },
+ { .name = "ldo10", },
+ { .name = "ldo11", },
+};
+
+static int as3722_get_regulator_dt_data(struct platform_device *pdev,
+ struct as3722_regulators *as3722_regs)
+{
+ struct device_node *np;
+ struct as3722_regulator_config_data *reg_config;
+ u32 prop;
+ int id;
+ int ret;
+
+ np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
+ if (!np) {
+ dev_err(&pdev->dev, "Device is not having regulators node\n");
+ return -ENODEV;
+ }
+ pdev->dev.of_node = np;
+
+ ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
+ ARRAY_SIZE(as3722_regulator_matches));
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
+ ret);
+ return ret;
+ }
+
+ for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
+ struct device_node *reg_node;
+
+ reg_config = &as3722_regs->reg_config_data[id];
+ reg_config->reg_init = as3722_regulator_matches[id].init_data;
+ reg_node = as3722_regulator_matches[id].of_node;
+
+ if (!reg_config->reg_init || !reg_node)
+ continue;
+
+ ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
+ if (!ret) {
+ if (prop < 3)
+ reg_config->ext_control = prop;
+ else
+ dev_warn(&pdev->dev,
+ "ext-control have invalid option: %u\n",
+ prop);
+ }
+ reg_config->enable_tracking =
+ of_property_read_bool(reg_node, "ams,enable-tracking");
+ }
+ return 0;
+}
+
+static int as3722_regulator_probe(struct platform_device *pdev)
+{
+ struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
+ struct as3722_regulators *as3722_regs;
+ struct as3722_regulator_config_data *reg_config;
+ struct regulator_dev *rdev;
+ struct regulator_config config = { };
+ struct regulator_ops *ops;
+ int id;
+ int ret;
+
+ as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
+ GFP_KERNEL);
+ if (!as3722_regs)
+ return -ENOMEM;
+
+ as3722_regs->dev = &pdev->dev;
+ as3722_regs->as3722 = as3722;
+ platform_set_drvdata(pdev, as3722_regs);
+
+ ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
+ if (ret < 0)
+ return ret;
+
+ config.dev = &pdev->dev;
+ config.driver_data = as3722_regs;
+ config.regmap = as3722->regmap;
+
+ for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
+ reg_config = &as3722_regs->reg_config_data[id];
+
+ as3722_regs->desc[id].name = as3722_reg_lookup[id].name;
+ as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname;
+ as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id;
+ as3722_regs->desc[id].n_voltages =
+ as3722_reg_lookup[id].n_voltages;
+ as3722_regs->desc[id].type = REGULATOR_VOLTAGE;
+ as3722_regs->desc[id].owner = THIS_MODULE;
+ as3722_regs->desc[id].enable_reg =
+ as3722_reg_lookup[id].enable_reg;
+ as3722_regs->desc[id].enable_mask =
+ as3722_reg_lookup[id].enable_mask;
+ as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg;
+ as3722_regs->desc[id].vsel_mask =
+ as3722_reg_lookup[id].vsel_mask;
+ switch (id) {
+ case AS3722_REGULATOR_ID_LDO0:
+ if (reg_config->ext_control)
+ ops = &as3722_ldo0_extcntrl_ops;
+ else
+ ops = &as3722_ldo0_ops;
+ as3722_regs->desc[id].min_uV = 825000;
+ as3722_regs->desc[id].uV_step = 25000;
+ as3722_regs->desc[id].linear_min_sel = 1;
+ as3722_regs->desc[id].enable_time = 500;
+ break;
+ case AS3722_REGULATOR_ID_LDO3:
+ if (reg_config->ext_control)
+ ops = &as3722_ldo3_extcntrl_ops;
+ else
+ ops = &as3722_ldo3_ops;
+ as3722_regs->desc[id].min_uV = 620000;
+ as3722_regs->desc[id].uV_step = 20000;
+ as3722_regs->desc[id].linear_min_sel = 1;
+ as3722_regs->desc[id].enable_time = 500;
+ if (reg_config->enable_tracking) {
+ ret = as3722_ldo3_set_tracking_mode(as3722_regs,
+ id, AS3722_LDO3_MODE_PMOS_TRACKING);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "LDO3 tracking failed: %d\n",
+ ret);
+ return ret;
+ }
+ }
+ break;
+ case AS3722_REGULATOR_ID_SD0:
+ case AS3722_REGULATOR_ID_SD1:
+ case AS3722_REGULATOR_ID_SD6:
+ if (reg_config->ext_control)
+ ops = &as3722_sd016_extcntrl_ops;
+ else
+ ops = &as3722_sd016_ops;
+ as3722_regs->desc[id].min_uV = 610000;
+ as3722_regs->desc[id].uV_step = 10000;
+ as3722_regs->desc[id].linear_min_sel = 1;
+ break;
+ case AS3722_REGULATOR_ID_SD2:
+ case AS3722_REGULATOR_ID_SD3:
+ case AS3722_REGULATOR_ID_SD4:
+ case AS3722_REGULATOR_ID_SD5:
+ if (reg_config->ext_control)
+ ops = &as3722_sd2345_extcntrl_ops;
+ else
+ ops = &as3722_sd2345_ops;
+ as3722_regs->desc[id].linear_ranges =
+ as3722_sd2345_ranges;
+ as3722_regs->desc[id].n_linear_ranges =
+ ARRAY_SIZE(as3722_sd2345_ranges);
+ break;
+ default:
+ if (reg_config->ext_control)
+ ops = &as3722_ldo_extcntrl_ops;
+ else
+ ops = &as3722_ldo_ops;
+ as3722_regs->desc[id].min_uV = 825000;
+ as3722_regs->desc[id].uV_step = 25000;
+ as3722_regs->desc[id].linear_min_sel = 1;
+ as3722_regs->desc[id].enable_time = 500;
+ as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges;
+ as3722_regs->desc[id].n_linear_ranges =
+ ARRAY_SIZE(as3722_ldo_ranges);
+ break;
+ }
+ as3722_regs->desc[id].ops = ops;
+ config.init_data = reg_config->reg_init;
+ config.of_node = as3722_regulator_matches[id].of_node;
+ rdev = devm_regulator_register(&pdev->dev,
+ &as3722_regs->desc[id], &config);
+ if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
+ dev_err(&pdev->dev, "regulator %d register failed %d\n",
+ id, ret);
+ return ret;
+ }
+
+ as3722_regs->rdevs[id] = rdev;
+ if (reg_config->ext_control) {
+ ret = regulator_enable_regmap(rdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Regulator %d enable failed: %d\n",
+ id, ret);
+ return ret;
+ }
+ ret = as3722_extreg_init(as3722_regs, id,
+ reg_config->ext_control);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "AS3722 ext control failed: %d", ret);
+ return ret;
+ }
+ }
+ }
+ return 0;
+}
+
+static const struct of_device_id of_as3722_regulator_match[] = {
+ { .compatible = "ams,as3722-regulator", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
+
+static struct platform_driver as3722_regulator_driver = {
+ .driver = {
+ .name = "as3722-regulator",
+ .owner = THIS_MODULE,
+ .of_match_table = of_as3722_regulator_match,
+ },
+ .probe = as3722_regulator_probe,
+};
+
+module_platform_driver(as3722_regulator_driver);
+
+MODULE_ALIAS("platform:as3722-regulator");
+MODULE_DESCRIPTION("AS3722 regulator driver");
+MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL");
--
1.7.1.1


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