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Date: Mon, 26 May 2014 15:20:21 +0200
From: Krzysztof Kozlowski <k.kozlowski@...sung.com>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Sangbeom Kim <sbkim73@...sung.com>,
Lee Jones <lee.jones@...aro.org>,
Sachin Kamat <sachin.kamat@...aro.org>,
linux-kernel@...r.kernel.org
Cc: linux-samsung-soc@...r.kernel.org,
Tomasz Figa <t.figa@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
devicetree@...r.kernel.org,
Krzysztof Kozlowski <k.kozlowski@...sung.com>
Subject: [PATCH 1/3] regulator: s2mps11: Refactor setting ramp delay
Prepare for merging the s2mpa01 regulator driver into s2mps11 by:
1. Adding common id for buck regulators.
2. Splitting shared ramp delay settings to match S2MPA01.
3. Adding a configuration of registers for setting ramp delay for each
buck regulator.
The functionality of the driver should not change as this patch only
prepares for supporting S2MPA01 device.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
---
drivers/regulator/s2mps11.c | 210 ++++++++++++++++++++++++++++++--------------
1 file changed, 144 insertions(+), 66 deletions(-)
diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 02e2fb2fca66..fa12d75b784f 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -32,13 +32,32 @@
#include <linux/mfd/samsung/s2mps11.h>
#include <linux/mfd/samsung/s2mps14.h>
+/*
+ * Enum used as a common id of buck regulators on S2MPA01 and S2MPS11.
+ */
+enum s2mpx_bucks {
+ S2MPX_BUCK1,
+ S2MPX_BUCK2,
+ S2MPX_BUCK3,
+ S2MPX_BUCK4,
+ S2MPX_BUCK5,
+ S2MPX_BUCK6,
+ S2MPX_BUCK7,
+ S2MPX_BUCK8,
+ S2MPX_BUCK9,
+ S2MPX_BUCK10,
+};
+
struct s2mps11_info {
+ enum sec_device_type dev_type;
unsigned int rdev_num;
int ramp_delay2;
- int ramp_delay34;
+ int ramp_delay3;
+ int ramp_delay4;
int ramp_delay5;
int ramp_delay16;
- int ramp_delay7810;
+ int ramp_delay7;
+ int ramp_delay810;
int ramp_delay9;
/*
* One bit for each S2MPS14 regulator whether the suspend mode
@@ -49,6 +68,47 @@ struct s2mps11_info {
int *ext_control_gpio;
};
+/*
+ * Description of ramp delay register for one buck regulator
+ * on S2MPA01 and S2MPS11.
+ */
+struct s2mpx_ramp_reg {
+ unsigned int ramp_shift;
+ unsigned int ramp_reg;
+ unsigned int enable_shift;
+ bool enable_supported;
+};
+
+#define s2mps11_ramp_reg(r_shift) { \
+ .ramp_shift = S2MPS11_ ## r_shift ## _RAMP_SHIFT, \
+ .ramp_reg = S2MPS11_REG_RAMP_BUCK, \
+ .enable_shift = 0, \
+ .enable_supported = false, \
+}
+#define s2mps11_buck2346_ramp_reg(r_shift, r_reg, e_shift) { \
+ .ramp_shift = S2MPS11_ ## r_shift ## _RAMP_SHIFT, \
+ .ramp_reg = S2MPS11_REG_ ## r_reg, \
+ .enable_shift = S2MPS11_ ## e_shift ## _RAMP_EN_SHIFT,\
+ .enable_supported = true, \
+}
+
+static const struct s2mpx_ramp_reg s2mps11_ramp_regs[] = {
+ [S2MPX_BUCK1] = s2mps11_ramp_reg(BUCK16),
+ [S2MPX_BUCK2] = s2mps11_buck2346_ramp_reg(BUCK2, RAMP, BUCK2),
+ [S2MPX_BUCK3] = s2mps11_buck2346_ramp_reg(BUCK34, RAMP, BUCK3),
+ [S2MPX_BUCK4] = s2mps11_buck2346_ramp_reg(BUCK34, RAMP, BUCK4),
+ [S2MPX_BUCK5] = s2mps11_ramp_reg(BUCK5),
+ [S2MPX_BUCK6] = s2mps11_buck2346_ramp_reg(BUCK16, RAMP_BUCK, BUCK6),
+ [S2MPX_BUCK7] = s2mps11_ramp_reg(BUCK7810),
+ [S2MPX_BUCK8] = s2mps11_ramp_reg(BUCK7810),
+ [S2MPX_BUCK9] = s2mps11_ramp_reg(BUCK9),
+ [S2MPX_BUCK10] = s2mps11_ramp_reg(BUCK7810),
+};
+
+static const struct s2mpx_ramp_reg * const s2mpx_ramp_regs[] = {
+ [S2MPS11X] = s2mps11_ramp_regs,
+};
+
static int get_ramp_delay(int ramp_delay)
{
unsigned char cnt = 0;
@@ -68,6 +128,23 @@ static int get_ramp_delay(int ramp_delay)
return cnt;
}
+/*
+ * Maps a buck regulator id to enum s2mpx_bucks.
+ * Valid only for buck regulators on on S2MPS11.
+ *
+ * Returns a value of enum s2mpx_bucks or -EINVAL.
+ */
+static int get_s2mpx_buck_id(enum sec_device_type dev_type,
+ int rdev_id)
+{
+ switch (dev_type) {
+ case S2MPS11X:
+ return rdev_id - S2MPS11_BUCK1;
+ default:
+ return -EINVAL;
+ }
+}
+
static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector)
@@ -75,29 +152,40 @@ static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
struct s2mps11_info *s2mps11 = rdev_get_drvdata(rdev);
unsigned int ramp_delay = 0;
int old_volt, new_volt;
+ int buck_id = get_s2mpx_buck_id(s2mps11->dev_type, rdev_get_id(rdev));
- switch (rdev_get_id(rdev)) {
- case S2MPS11_BUCK2:
+ switch (buck_id) {
+ case S2MPX_BUCK2:
ramp_delay = s2mps11->ramp_delay2;
break;
- case S2MPS11_BUCK3:
- case S2MPS11_BUCK4:
- ramp_delay = s2mps11->ramp_delay34;
+ case S2MPX_BUCK3:
+ ramp_delay = s2mps11->ramp_delay3;
break;
- case S2MPS11_BUCK5:
+ case S2MPX_BUCK4:
+ ramp_delay = s2mps11->ramp_delay4;
+ break;
+ case S2MPX_BUCK5:
ramp_delay = s2mps11->ramp_delay5;
break;
- case S2MPS11_BUCK6:
- case S2MPS11_BUCK1:
+ case S2MPX_BUCK6:
+ case S2MPX_BUCK1:
ramp_delay = s2mps11->ramp_delay16;
break;
- case S2MPS11_BUCK7:
- case S2MPS11_BUCK8:
- case S2MPS11_BUCK10:
- ramp_delay = s2mps11->ramp_delay7810;
+ case S2MPX_BUCK7:
+ ramp_delay = s2mps11->ramp_delay7;
break;
- case S2MPS11_BUCK9:
+ case S2MPX_BUCK8:
+ case S2MPX_BUCK10:
+ ramp_delay = s2mps11->ramp_delay810;
+ break;
+ case S2MPX_BUCK9:
ramp_delay = s2mps11->ramp_delay9;
+ break;
+ default:
+ dev_err(rdev_get_dev(rdev),
+ "Wrong regulator id %d for set_voltage_time_sel\n",
+ rdev_get_id(rdev));
+ return -EINVAL;
}
if (ramp_delay == 0)
@@ -112,66 +200,55 @@ static int s2mps11_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
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;
+ const struct s2mpx_ramp_reg *ramp_reg;
+ unsigned int ramp_val;
+ unsigned int ramp_enable = 1;
+ int buck_id;
int ret;
- switch (rdev_get_id(rdev)) {
- case S2MPS11_BUCK1:
+ buck_id = get_s2mpx_buck_id(s2mps11->dev_type, rdev_get_id(rdev));
+
+ switch (buck_id) {
+ case S2MPX_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;
+ case S2MPX_BUCK2:
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;
+ case S2MPX_BUCK3:
if (!ramp_delay) {
ramp_enable = 0;
break;
}
- if (ramp_delay > s2mps11->ramp_delay34)
- s2mps11->ramp_delay34 = ramp_delay;
+ if (ramp_delay > s2mps11->ramp_delay3)
+ s2mps11->ramp_delay3 = ramp_delay;
else
- ramp_delay = s2mps11->ramp_delay34;
-
- ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
- ramp_reg = S2MPS11_REG_RAMP;
+ ramp_delay = s2mps11->ramp_delay3;
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;
+ if (ramp_delay > s2mps11->ramp_delay4)
+ s2mps11->ramp_delay4 = ramp_delay;
else
- ramp_delay = s2mps11->ramp_delay34;
-
- ramp_shift = S2MPS11_BUCK34_RAMP_SHIFT;
- ramp_reg = S2MPS11_REG_RAMP;
+ ramp_delay = s2mps11->ramp_delay4;
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;
@@ -181,36 +258,37 @@ static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
s2mps11->ramp_delay16 = ramp_delay;
else
ramp_delay = s2mps11->ramp_delay16;
-
- ramp_shift = S2MPS11_BUCK16_RAMP_SHIFT;
break;
case S2MPS11_BUCK7:
+ if (ramp_delay > s2mps11->ramp_delay7)
+ s2mps11->ramp_delay7 = ramp_delay;
+ else
+ ramp_delay = s2mps11->ramp_delay7;
+ break;
case S2MPS11_BUCK8:
case S2MPS11_BUCK10:
- if (ramp_delay > s2mps11->ramp_delay7810)
- s2mps11->ramp_delay7810 = ramp_delay;
+ if (ramp_delay > s2mps11->ramp_delay810)
+ s2mps11->ramp_delay810 = ramp_delay;
else
- ramp_delay = s2mps11->ramp_delay7810;
-
- ramp_shift = S2MPS11_BUCK7810_RAMP_SHIFT;
+ ramp_delay = s2mps11->ramp_delay810;
break;
case S2MPS11_BUCK9:
s2mps11->ramp_delay9 = ramp_delay;
- ramp_shift = S2MPS11_BUCK9_RAMP_SHIFT;
break;
default:
return 0;
}
+ ramp_reg = &s2mpx_ramp_regs[s2mps11->dev_type][buck_id];
+
if (!ramp_enable)
goto ramp_disable;
/* Ramp delay can be enabled/disabled only for buck[2346] */
- if ((rdev_get_id(rdev) >= S2MPS11_BUCK2 &&
- rdev_get_id(rdev) <= S2MPS11_BUCK4) ||
- rdev_get_id(rdev) == S2MPS11_BUCK6) {
+ if (ramp_reg->enable_supported) {
ret = regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
- 1 << enable_shift, 1 << enable_shift);
+ 1 << ramp_reg->enable_shift,
+ 1 << ramp_reg->enable_shift);
if (ret) {
dev_err(&rdev->dev, "failed to enable ramp rate\n");
return ret;
@@ -219,12 +297,13 @@ static int s2mps11_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
ramp_val = get_ramp_delay(ramp_delay);
- return regmap_update_bits(rdev->regmap, ramp_reg, 0x3 << ramp_shift,
- ramp_val << ramp_shift);
+ return regmap_update_bits(rdev->regmap, ramp_reg->ramp_reg,
+ 0x3 << ramp_reg->ramp_shift,
+ ramp_val << ramp_reg->ramp_shift);
ramp_disable:
return regmap_update_bits(rdev->regmap, S2MPS11_REG_RAMP,
- 1 << enable_shift, 0);
+ 1 << ramp_reg->enable_shift, 0);
}
static struct regulator_ops s2mps11_ldo_ops = {
@@ -250,7 +329,7 @@ static struct regulator_ops s2mps11_buck_ops = {
.set_ramp_delay = s2mps11_set_ramp_delay,
};
-#define regulator_desc_s2mps11_ldo1(num) { \
+#define regulator_desc_s2mps11_ldo1(num) { \
.name = "LDO"#num, \
.id = S2MPS11_LDO##num, \
.ops = &s2mps11_ldo_ops, \
@@ -605,8 +684,7 @@ static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev,
}
static int s2mps11_pmic_dt_parse(struct platform_device *pdev,
- struct of_regulator_match *rdata, struct s2mps11_info *s2mps11,
- enum sec_device_type dev_type)
+ struct of_regulator_match *rdata, struct s2mps11_info *s2mps11)
{
struct device_node *reg_np;
@@ -617,7 +695,7 @@ static int s2mps11_pmic_dt_parse(struct platform_device *pdev,
}
of_regulator_match(&pdev->dev, reg_np, rdata, s2mps11->rdev_num);
- if (dev_type == S2MPS14X)
+ if (s2mps11->dev_type == S2MPS14X)
s2mps14_pmic_dt_parse_ext_control_gpio(pdev, rdata, s2mps11);
of_node_put(reg_np);
@@ -634,15 +712,14 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
struct s2mps11_info *s2mps11;
int i, ret = 0;
const struct regulator_desc *regulators;
- enum sec_device_type dev_type;
s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
GFP_KERNEL);
if (!s2mps11)
return -ENOMEM;
- dev_type = platform_get_device_id(pdev)->driver_data;
- switch (dev_type) {
+ s2mps11->dev_type = platform_get_device_id(pdev)->driver_data;
+ switch (s2mps11->dev_type) {
case S2MPS11X:
s2mps11->rdev_num = ARRAY_SIZE(s2mps11_regulators);
regulators = s2mps11_regulators;
@@ -652,7 +729,8 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
regulators = s2mps14_regulators;
break;
default:
- dev_err(&pdev->dev, "Invalid device type: %u\n", dev_type);
+ dev_err(&pdev->dev, "Invalid device type: %u\n",
+ s2mps11->dev_type);
return -EINVAL;
};
@@ -686,7 +764,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
for (i = 0; i < s2mps11->rdev_num; i++)
rdata[i].name = regulators[i].name;
- ret = s2mps11_pmic_dt_parse(pdev, rdata, s2mps11, dev_type);
+ ret = s2mps11_pmic_dt_parse(pdev, rdata, s2mps11);
if (ret)
goto out;
--
1.9.1
--
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