regulator: rk808: Add regulator driver for RK818

Add support for the rk818 regulator. The regulator module consists
of 4 DCDCs, 9 LDOs, 1 switch and 1 BOOST converter which is used to
power OTG and HDMI5V.

The output voltages are configurable and are meant to supply power
to the main processor and other components.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

2 files changed, 138 insertions, 9 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 6c88e31c01f7..d3a86a8cce86 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -635,11 +635,11 @@ config REGULATOR_RC5T583
           outputs which can be controlled by i2c communication.
 
 config REGULATOR_RK808
-        tristate "Rockchip RK808 Power regulators"
+        tristate "Rockchip RK808/RK818 Power regulators"
         depends on MFD_RK808
         help
           Select this option to enable the power regulator of ROCKCHIP
-          PMIC RK808.
+          PMIC RK808 and RK818.
           This driver supports the control of different power rails of device
           through regulator interface. The device supports multiple DCDC/LDO
           outputs which can be controlled by i2c communication.
diff --git a/drivers/regulator/rk808-regulator.c b/drivers/regulator/rk808-regulator.c
index 40d07ba036e7..5f412a5e35e3 100644
--- a/drivers/regulator/rk808-regulator.c
+++ b/drivers/regulator/rk808-regulator.c
@@ -1,11 +1,15 @@
 /*
- * Regulator driver for Rockchip RK808
+ * Regulator driver for Rockchip RK808/RK818
  *
  * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
  *
  * Author: Chris Zhong <zyw@rock-chips.com>
  * Author: Zhang Qing <zhangqing@rock-chips.com>
  *
+ * Copyright (C) 2016 PHYTEC Messtechnik GmbH
+ *
+ * Author: Wadim Egorov <w.egorov@phytec.de>
+ *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
@@ -32,6 +36,12 @@
 #define RK808_BUCK4_VSEL_MASK   0xf
 #define RK808_LDO_VSEL_MASK     0x1f
 
+#define RK818_BUCK_VSEL_MASK            0x3f
+#define RK818_BUCK4_VSEL_MASK           0x1f
+#define RK818_LDO_VSEL_MASK             0x1f
+#define RK818_LDO3_ON_VSEL_MASK         0xf
+#define RK818_BOOST_ON_VSEL_MASK        0xe0
+
 /* Ramp rate definitions for buck1 / buck2 only */
 #define RK808_RAMP_RATE_OFFSET          3
 #define RK808_RAMP_RATE_MASK            (3 << RK808_RAMP_RATE_OFFSET)
@@ -454,6 +464,108 @@ static const struct regulator_desc rk808_reg[] = {
                 RK808_DCDC_EN_REG, BIT(6)),
 };
 
+static const struct regulator_desc rk818_reg[] = {
+        {
+                .name = "DCDC_REG1",
+                .supply_name = "vcc1",
+                .of_match = of_match_ptr("DCDC_REG1"),
+                .regulators_node = of_match_ptr("regulators"),
+                .id = RK818_ID_DCDC1,
+                .ops = &rk808_reg_ops,
+                .type = REGULATOR_VOLTAGE,
+                .min_uV = 712500,
+                .uV_step = 12500,
+                .n_voltages = 64,
+                .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
+                .vsel_mask = RK818_BUCK_VSEL_MASK,
+                .enable_reg = RK818_DCDC_EN_REG,
+                .enable_mask = BIT(0),
+                .owner = THIS_MODULE,
+        }, {
+                .name = "DCDC_REG2",
+                .supply_name = "vcc2",
+                .of_match = of_match_ptr("DCDC_REG2"),
+                .regulators_node = of_match_ptr("regulators"),
+                .id = RK818_ID_DCDC2,
+                .ops = &rk808_reg_ops,
+                .type = REGULATOR_VOLTAGE,
+                .min_uV = 712500,
+                .uV_step = 12500,
+                .n_voltages = 64,
+                .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
+                .vsel_mask = RK818_BUCK_VSEL_MASK,
+                .enable_reg = RK818_DCDC_EN_REG,
+                .enable_mask = BIT(1),
+                .owner = THIS_MODULE,
+        }, {
+                .name = "DCDC_REG3",
+                .supply_name = "vcc3",
+                .of_match = of_match_ptr("DCDC_REG3"),
+                .regulators_node = of_match_ptr("regulators"),
+                .id = RK818_ID_DCDC3,
+                .ops = &rk808_switch_ops,
+                .type = REGULATOR_VOLTAGE,
+                .n_voltages = 1,
+                .enable_reg = RK818_DCDC_EN_REG,
+                .enable_mask = BIT(2),
+                .owner = THIS_MODULE,
+        },
+        RK8XX_DESC(RK818_ID_DCDC4, "DCDC_REG4", "vcc4", 1800, 3600, 100,
+                RK818_BUCK4_ON_VSEL_REG, RK818_BUCK4_VSEL_MASK,
+                RK818_DCDC_EN_REG, BIT(3), 0),
+        RK8XX_DESC(RK818_ID_BOOST, "DCDC_BOOST", "boost", 4700, 5400, 100,
+                RK818_BOOST_LDO9_ON_VSEL_REG, RK818_BOOST_ON_VSEL_MASK,
+                RK818_DCDC_EN_REG, BIT(4), 0),
+        RK8XX_DESC(RK818_ID_LDO1, "LDO_REG1", "vcc6", 1800, 3400, 100,
+                RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
+                BIT(0), 400),
+        RK8XX_DESC(RK818_ID_LDO2, "LDO_REG2", "vcc6", 1800, 3400, 100,
+                RK818_LDO1_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
+                BIT(1), 400),
+        {
+                .name = "LDO_REG3",
+                .supply_name = "vcc7",
+                .of_match = of_match_ptr("LDO_REG3"),
+                .regulators_node = of_match_ptr("regulators"),
+                .id = RK818_ID_LDO3,
+                .ops = &rk808_reg_ops_ranges,
+                .type = REGULATOR_VOLTAGE,
+                .n_voltages = 16,
+                .linear_ranges = rk808_ldo3_voltage_ranges,
+                .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
+                .vsel_reg = RK818_LDO3_ON_VSEL_REG,
+                .vsel_mask = RK818_LDO3_ON_VSEL_MASK,
+                .enable_reg = RK818_LDO_EN_REG,
+                .enable_mask = BIT(2),
+                .enable_time = 400,
+                .owner = THIS_MODULE,
+        },
+        RK8XX_DESC(RK818_ID_LDO4, "LDO_REG4", "vcc8", 1800, 3400, 100,
+                RK818_LDO4_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
+                BIT(3), 400),
+        RK8XX_DESC(RK818_ID_LDO5, "LDO_REG5", "vcc7", 1800, 3400, 100,
+                RK818_LDO5_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
+                BIT(4), 400),
+        RK8XX_DESC(RK818_ID_LDO6, "LDO_REG6", "vcc8", 800, 2500, 100,
+                RK818_LDO6_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
+                BIT(5), 400),
+        RK8XX_DESC(RK818_ID_LDO7, "LDO_REG7", "vcc7", 800, 2500, 100,
+                RK818_LDO7_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
+                BIT(6), 400),
+        RK8XX_DESC(RK818_ID_LDO8, "LDO_REG8", "vcc8", 1800, 3400, 100,
+                RK818_LDO8_ON_VSEL_REG, RK818_LDO_VSEL_MASK, RK818_LDO_EN_REG,
+                BIT(7), 400),
+        RK8XX_DESC(RK818_ID_LDO9, "LDO_REG9", "vcc9", 1800, 3400, 100,
+                RK818_BOOST_LDO9_ON_VSEL_REG, RK818_LDO_VSEL_MASK,
+                RK818_DCDC_EN_REG, BIT(5), 400),
+        RK8XX_DESC_SWITCH(RK818_ID_SWITCH, "SWITCH_REG", "vcc9",
+                RK818_DCDC_EN_REG, BIT(6)),
+        RK8XX_DESC_SWITCH(RK818_ID_HDMI_SWITCH, "HDMI_SWITCH", "h_5v",
+                RK818_H5V_EN_REG, BIT(0)),
+        RK8XX_DESC_SWITCH(RK818_ID_OTG_SWITCH, "OTG_SWITCH", "usb",
+                RK818_DCDC_EN_REG, BIT(7)),
+};
+
 static int rk808_regulator_dt_parse_pdata(struct device *dev,
                                    struct device *client_dev,
                                    struct regmap *map,
@@ -499,7 +611,8 @@ static int rk808_regulator_probe(struct platform_device *pdev)
         struct regulator_config config = {};
         struct regulator_dev *rk808_rdev;
         struct rk808_regulator_data *pdata;
-        int ret, i;
+        const struct regulator_desc *regulators;
+        int ret, i, nregulators;
 
         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
         if (!pdata)
@@ -512,14 +625,29 @@ static int rk808_regulator_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, pdata);
 
+        switch (rk808->variant) {
+        case RK808_ID:
+                regulators = rk808_reg;
+                nregulators = RK808_NUM_REGULATORS;
+                break;
+        case RK818_ID:
+                regulators = rk818_reg;
+                nregulators = RK818_NUM_REGULATORS;
+                break;
+        default:
+                dev_err(&client->dev, "unsupported RK8XX ID %lu\n",
+                        rk808->variant);
+                return -EINVAL;
+        }
+
         config.dev = &client->dev;
         config.driver_data = pdata;
         config.regmap = rk808->regmap;
 
         /* Instantiate the regulators */
-        for (i = 0; i < RK808_NUM_REGULATORS; i++) {
+        for (i = 0; i < nregulators; i++) {
                 rk808_rdev = devm_regulator_register(&pdev->dev,
-                                                     &rk808_reg[i], &config);
+                                                     &regulators[i], &config);
                 if (IS_ERR(rk808_rdev)) {
                         dev_err(&client->dev,
                                 "failed to register %d regulator\n", i);
@@ -540,8 +668,9 @@ static struct platform_driver rk808_regulator_driver = {
 
 module_platform_driver(rk808_regulator_driver);
 
-MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
-MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
-MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
+MODULE_DESCRIPTION("regulator driver for the RK808/RK818 series PMICs");
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_AUTHOR("Zhang Qing <zhangqing@rock-chips.com>");
+MODULE_AUTHOR("Wadim Egorov <w.egorov@phytec.de>");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:rk808-regulator");