2 files changed, 211 insertions, 45 deletions

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 2f62564ca936..5eba2ff8c0e8 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -16,12 +16,17 @@
 #include <linux/gpio.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
 #include <linux/mfd/samsung/core.h>
 #include <linux/mfd/samsung/s2mps11.h>
 
+#define S2MPS11_REGULATOR_CNT ARRAY_SIZE(regulators)
+
 struct s2mps11_info {
         struct regulator_dev *rdev[S2MPS11_REGULATOR_MAX];
 
@@ -31,11 +36,6 @@ struct s2mps11_info {
         int ramp_delay16;
         int ramp_delay7810;
         int ramp_delay9;
-
-        bool buck6_ramp;
-        bool buck2_ramp;
-        bool buck3_ramp;
-        bool buck4_ramp;
 };
 
 static int get_ramp_delay(int ramp_delay)
@@ -50,9 +50,171 @@ static int get_ramp_delay(int ramp_delay)
                         break;
                 cnt++;
         }
+
+        if (cnt > 3)
+                cnt = 3;
+
         return cnt;
 }
 
+static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
+                                   unsigned int old_selector,
+                                   unsigned int new_selector)
+{
+        struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
+        unsigned int ramp_delay = 0;
+        int old_volt, new_volt;
+
+        switch (rdev->desc->id) {
+        case S2MPS11_BUCK2:
+                ramp_delay = s2mps11->ramp_delay2;
+                break;
+        case S2MPS11_BUCK3:
+                ramp_delay = s2mps11->ramp_delay34;
+                break;
+        case S2MPS11_BUCK4:
+                ramp_delay = s2mps11->ramp_delay34;
+                break;
+        case S2MPS11_BUCK5:
+                ramp_delay = s2mps11->ramp_delay5;
+                break;
+        case S2MPS11_BUCK6:
+        case S2MPS11_BUCK1:
+                ramp_delay = s2mps11->ramp_delay16;
+                break;
+        case S2MPS11_BUCK7:
+        case S2MPS11_BUCK8:
+        case S2MPS11_BUCK10:
+                ramp_delay = s2mps11->ramp_delay7810;
+                break;
+        case S2MPS11_BUCK9:
+                ramp_delay = s2mps11->ramp_delay9;
+        }
+
+        if (ramp_delay == 0)
+                ramp_delay = rdev->desc->ramp_delay;
+
+        old_volt = rdev->desc->min_uV + (rdev->desc->uV_step * old_selector);
+        new_volt = rdev->desc->min_uV + (rdev->desc->uV_step * new_selector);
+
+        return DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay);
+}
+
+static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
+{
+        struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
+        unsigned int ramp_val, ramp_shift, ramp_reg = S2MPS11_REG_RAMP_BUCK;
+        unsigned int ramp_enable = 1, enable_shift = 0;
+        int ret;
+
+        switch (rdev->desc->id) {
+        case S2MPS11_BUCK1:
+                if (ramp_delay > s2mps11->ramp_delay16)
+                        s2mps11->ramp_delay16 = ramp_delay;
+                else
+                        ramp_delay = s2mps11->ramp_delay16;
+
+                ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
+                break;
+        case S2MPS11_BUCK2:
+                enable_shift = S2MPS11_BUCK2_RAMP_EN_SHIFT;
+                if (!ramp_delay) {
+                        ramp_enable = 0;
+                        break;
+                }
+
+                s2mps11->ramp_delay2 = ramp_delay;
+                ramp_shift = S2MPS11_BUCK2_RAMP_SHIFT;
+                ramp_reg = S2MPS11_REG_RAMP;
+                break;
+        case S2MPS11_BUCK3:
+                enable_shift = S2MPS11_BUCK3_RAMP_EN_SHIFT;
+                if (!ramp_delay) {
+                        ramp_enable = 0;
+                        break;
+                }
+
+                if (ramp_delay > s2mps11->ramp_delay34)
+                        s2mps11->ramp_delay34 = ramp_delay;
+                else
+                        ramp_delay = s2mps11->ramp_delay34;
+
+                ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
+                ramp_reg = S2MPS11_REG_RAMP;
+                break;
+        case S2MPS11_BUCK4:
+                enable_shift = S2MPS11_BUCK4_RAMP_EN_SHIFT;
+                if (!ramp_delay) {
+                        ramp_enable = 0;
+                        break;
+                }
+
+                if (ramp_delay > s2mps11->ramp_delay34)
+                        s2mps11->ramp_delay34 = ramp_delay;
+                else
+                        ramp_delay = s2mps11->ramp_delay34;
+
+                ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
+                ramp_reg = S2MPS11_REG_RAMP;
+                break;
+        case S2MPS11_BUCK5:
+                s2mps11->ramp_delay5 = ramp_delay;
+                ramp_shift = S2MPS11_BUCK5_RAMP_SHIFT;
+                break;
+        case S2MPS11_BUCK6:
+                enable_shift = S2MPS11_BUCK6_RAMP_EN_SHIFT;
+                if (!ramp_delay) {
+                        ramp_enable = 0;
+                        break;
+                }
+
+                if (ramp_delay > s2mps11->ramp_delay16)
+                        s2mps11->ramp_delay16 = ramp_delay;
+                else
+                        ramp_delay = s2mps11->ramp_delay16;
+
+                ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
+                break;
+        case S2MPS11_BUCK7:
+        case S2MPS11_BUCK8:
+        case S2MPS11_BUCK10:
+                if (ramp_delay > s2mps11->ramp_delay7810)
+                        s2mps11->ramp_delay7810 = ramp_delay;
+                else
+                        ramp_delay = s2mps11->ramp_delay7810;
+
+                ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
+                break;
+        case S2MPS11_BUCK9:
+                s2mps11->ramp_delay9 = ramp_delay;
+                ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
+                break;
+        default:
+                return 0;
+        }
+
+        if (!ramp_enable)
+                goto ramp_disable;
+
+        if (enable_shift) {
+                ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
+                                        1 << enable_shift, 1 << enable_shift);
+                if (ret) {
+                        dev_err(&rdev->dev, "failed to enable ramp rate\n");
+                        return ret;
+                }
+        }
+
+        ramp_val = get_ramp_delay(ramp_delay);
+
+        return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
+                                  ramp_val << ramp_shift);
+
+ramp_disable:
+        return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
+                                  1 << enable_shift, 0);
+}
+
 static struct regulator_ops s2mps11_ldo_ops = {
         .list_voltage           = regulator_list_voltage_linear,
         .map_voltage            = regulator_map_voltage_linear,
@@ -72,7 +234,8 @@ static struct regulator_ops s2mps11_buck_ops = {
         .disable                = regulator_disable_regmap,
         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
-        .set_voltage_time_sel   = regulator_set_voltage_time_sel,
+        .set_voltage_time_sel   = s2mps11_regulator_set_voltage_time_sel,
+        .set_ramp_delay         = s2mps11_set_ramp_delay,
 };
 
 #define regulator_desc_ldo1(num)        {               \
@@ -239,59 +402,51 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 {
         struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
         struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
+        struct of_regulator_match rdata[S2MPS11_REGULATOR_MAX];
+        struct device_node *reg_np = NULL;
         struct regulator_config config = { };
         struct s2mps11_info *s2mps11;
         int i, ret;
-        unsigned char ramp_enable, ramp_reg = 0;
-
-        if (!pdata) {
-                dev_err(pdev->dev.parent, "Platform data not supplied\n");
-                return -ENODEV;
-        }
 
         s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
                                 GFP_KERNEL);
         if (!s2mps11)
                 return -ENOMEM;
 
-        platform_set_drvdata(pdev, s2mps11);
+        if (!iodev->dev->of_node) {
+                if (pdata) {
+                        goto common_reg;
+                } else {
+                        dev_err(pdev->dev.parent,
+                                "Platform data or DT node not supplied\n");
+                        return -ENODEV;
+                }
+        }
 
-        s2mps11->ramp_delay2 = pdata->buck2_ramp_delay;
-        s2mps11->ramp_delay34 = pdata->buck34_ramp_delay;
-        s2mps11->ramp_delay5 = pdata->buck5_ramp_delay;
-        s2mps11->ramp_delay16 = pdata->buck16_ramp_delay;
-        s2mps11->ramp_delay7810 = pdata->buck7810_ramp_delay;
-        s2mps11->ramp_delay9 = pdata->buck9_ramp_delay;
-
-        s2mps11->buck6_ramp = pdata->buck6_ramp_enable;
-        s2mps11->buck2_ramp = pdata->buck2_ramp_enable;
-        s2mps11->buck3_ramp = pdata->buck3_ramp_enable;
-        s2mps11->buck4_ramp = pdata->buck4_ramp_enable;
-
-        ramp_enable = (s2mps11->buck2_ramp << 3) | (s2mps11->buck3_ramp << 2) |
-                (s2mps11->buck4_ramp << 1) | s2mps11->buck6_ramp ;
-
-        if (ramp_enable) {
-                if (s2mps11->buck2_ramp)
-                        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay2) << 6;
-                if (s2mps11->buck3_ramp || s2mps11->buck4_ramp)
-                        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay34) << 4;
-                sec_reg_write(iodev, S2MPS11_REG_RAMP, ramp_reg | ramp_enable);
+        for (i = 0; i < S2MPS11_REGULATOR_CNT; i++)
+                rdata[i].name = regulators[i].name;
+
+        reg_np = of_find_node_by_name(iodev->dev->of_node, "regulators");
+        if (!reg_np) {
+                dev_err(&pdev->dev, "could not find regulators sub-node\n");
+                return -EINVAL;
         }
 
-        ramp_reg &= 0x00;
-        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay5) << 6;
-        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay16) << 4;
-        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay7810) << 2;
-        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay9);
-        sec_reg_write(iodev, S2MPS11_REG_RAMP_BUCK, ramp_reg);
+        of_regulator_match(&pdev->dev, reg_np, rdata, S2MPS11_REGULATOR_MAX);
 
-        for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
+common_reg:
+        platform_set_drvdata(pdev, s2mps11);
 
-                config.dev = &pdev->dev;
-                config.regmap = iodev->regmap;
-                config.init_data = pdata->regulators[i].initdata;
-                config.driver_data = s2mps11;
+        config.dev = &pdev->dev;
+        config.regmap = iodev->regmap;
+        config.driver_data = s2mps11;
+        for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
+                if (!reg_np) {
+                        config.init_data = pdata->regulators[i].initdata;
+                } else {
+                        config.init_data = rdata[i].init_data;
+                        config.of_node = rdata[i].of_node;
+                }
 
                 s2mps11->rdev[i] = regulator_register(&regulators[i], &config);
                 if (IS_ERR(s2mps11->rdev[i])) {
diff --git a/include/linux/mfd/samsung/s2mps11.h b/include/linux/mfd/samsung/s2mps11.h
index 4e94dc65f987..d0d52ea60074 100644
--- a/include/linux/mfd/samsung/s2mps11.h
+++ b/include/linux/mfd/samsung/s2mps11.h
@@ -191,6 +191,17 @@ enum s2mps11_regulators {
 #define S2MPS11_BUCK_N_VOLTAGES (S2MPS11_BUCK_VSEL_MASK + 1)
 #define S2MPS11_RAMP_DELAY      25000           /* uV/us */
 
+
+#define S2MPS11_BUCK2_RAMP_SHIFT        6
+#define S2MPS11_BUCK34_RAMP_SHIFT       4
+#define S2MPS11_BUCK5_RAMP_SHIFT        6
+#define S2MPS11_BUCK16_RAMP_SHIFT       4
+#define S2MPS11_BUCK7810_RAMP_SHIFT     2
+#define S2MPS11_BUCK9_RAMP_SHIFT        0
+#define S2MPS11_BUCK2_RAMP_EN_SHIFT     3
+#define S2MPS11_BUCK3_RAMP_EN_SHIFT     2
+#define S2MPS11_BUCK4_RAMP_EN_SHIFT     1
+#define S2MPS11_BUCK6_RAMP_EN_SHIFT     0
 #define S2MPS11_PMIC_EN_SHIFT   6
 #define S2MPS11_REGULATOR_MAX (S2MPS11_REG_MAX - 3)