[PATCH v4 4/7] regulator: qcom_spmi: Add support for PM8005

Jeffrey Hugo
2019-06-13T21:26:14Z

The PM8005 is used on the msm8998 MTP. The S1 regulator is VDD_GFX, ie
it needs to be on and controlled inorder to use the GPU. Add support to
drive the PM8005 regulators so that we can bring up the GPU on msm8998.

Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
drivers/regulator/qcom_spmi-regulator.c | 169 ++++++++++++++++++++++++
1 file changed, 169 insertions(+)

diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c
index 1b3383a24c9d..c8791b036c53 100644
--- a/drivers/regulator/qcom_spmi-regulator.c
+++ b/drivers/regulator/qcom_spmi-regulator.c
@@ -104,6 +104,7 @@ enum spmi_regulator_logical_type {
SPMI_REGULATOR_LOGICAL_TYPE_ULT_LO_SMPS,
SPMI_REGULATOR_LOGICAL_TYPE_ULT_HO_SMPS,
SPMI_REGULATOR_LOGICAL_TYPE_ULT_LDO,
+ SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS426,
};

enum spmi_regulator_type {
@@ -150,6 +151,7 @@ enum spmi_regulator_subtype {
SPMI_REGULATOR_SUBTYPE_5V_BOOST = 0x01,
SPMI_REGULATOR_SUBTYPE_FTS_CTL = 0x08,
SPMI_REGULATOR_SUBTYPE_FTS2p5_CTL = 0x09,
+ SPMI_REGULATOR_SUBTYPE_FTS426_CTL = 0x0a,
SPMI_REGULATOR_SUBTYPE_BB_2A = 0x01,
SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL1 = 0x0d,
SPMI_REGULATOR_SUBTYPE_ULT_HF_CTL2 = 0x0e,
@@ -170,6 +172,18 @@ enum spmi_common_regulator_registers {
SPMI_COMMON_REG_STEP_CTRL = 0x61,
};

+/*
+ * Second common register layout used by newer devices starting with ftsmps426
+ * Note that some of the registers from the first common layout remain
+ * unchanged and their definition is not duplicated.
+ */
+enum spmi_ftsmps426_regulator_registers {
+ SPMI_FTSMPS426_REG_VOLTAGE_LSB = 0x40,
+ SPMI_FTSMPS426_REG_VOLTAGE_MSB = 0x41,
+ SPMI_FTSMPS426_REG_VOLTAGE_ULS_LSB = 0x68,
+ SPMI_FTSMPS426_REG_VOLTAGE_ULS_MSB = 0x69,
+};
+
enum spmi_vs_registers {
SPMI_VS_REG_OCP = 0x4a,
SPMI_VS_REG_SOFT_START = 0x4c,
@@ -229,6 +243,14 @@ enum spmi_common_control_register_index {
#define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK 0x01
#define SPMI_COMMON_MODE_FOLLOW_ALL_MASK 0x1f

+#define SPMI_FTSMPS426_MODE_BYPASS_MASK 3
+#define SPMI_FTSMPS426_MODE_RETENTION_MASK 4
+#define SPMI_FTSMPS426_MODE_LPM_MASK 5
+#define SPMI_FTSMPS426_MODE_AUTO_MASK 6
+#define SPMI_FTSMPS426_MODE_HPM_MASK 7
+
+#define SPMI_FTSMPS426_MODE_MASK 0x07
+
/* Common regulator pull down control register layout */
#define SPMI_COMMON_PULL_DOWN_ENABLE_MASK 0x80

@@ -274,6 +296,23 @@ enum spmi_common_control_register_index {
#define SPMI_FTSMPS_STEP_MARGIN_NUM 4
#define SPMI_FTSMPS_STEP_MARGIN_DEN 5

+#define SPMI_FTSMPS426_STEP_CTRL_DELAY_MASK 0x03
+#define SPMI_FTSMPS426_STEP_CTRL_DELAY_SHIFT 0
+
+/* Clock rate in kHz of the FTSMPS426 regulator reference clock. */
+#define SPMI_FTSMPS426_CLOCK_RATE 4800
+
+/* Minimum voltage stepper delay for each step. */
+#define SPMI_FTSMPS426_STEP_DELAY 2
+
+/*
+ * The ratio SPMI_FTSMPS426_STEP_MARGIN_NUM/SPMI_FTSMPS426_STEP_MARGIN_DEN is
+ * used to adjust the step rate in order to account for oscillator variance.
+ */
+#define SPMI_FTSMPS426_STEP_MARGIN_NUM 10
+#define SPMI_FTSMPS426_STEP_MARGIN_DEN 11
+
+
/* VSET value to decide the range of ULT SMPS */
#define ULT_SMPS_RANGE_SPLIT 0x60

@@ -447,6 +486,10 @@ static struct spmi_voltage_range ftsmps2p5_ranges[] = {
SPMI_VOLTAGE_RANGE(1, 160000, 1360000, 2200000, 2200000, 10000),
};

+static struct spmi_voltage_range ftsmps426_ranges[] = {
+ SPMI_VOLTAGE_RANGE(0, 0, 320000, 1352000, 1352000, 4000),
+};
+
static struct spmi_voltage_range boost_ranges[] = {
SPMI_VOLTAGE_RANGE(0, 4000000, 4000000, 5550000, 5550000, 50000),
};
@@ -480,6 +523,7 @@ static DEFINE_SPMI_SET_POINTS(ln_ldo);
static DEFINE_SPMI_SET_POINTS(smps);
static DEFINE_SPMI_SET_POINTS(ftsmps);
static DEFINE_SPMI_SET_POINTS(ftsmps2p5);
+static DEFINE_SPMI_SET_POINTS(ftsmps426);
static DEFINE_SPMI_SET_POINTS(boost);
static DEFINE_SPMI_SET_POINTS(boost_byp);
static DEFINE_SPMI_SET_POINTS(ult_lo_smps);
@@ -747,6 +791,23 @@ spmi_regulator_common_set_voltage(struct regulator_dev *rdev, unsigned selector)
return spmi_vreg_write(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, buf, 2);
}

+static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev,
+ unsigned selector);
+
+static int spmi_regulator_ftsmps426_set_voltage(struct regulator_dev *rdev,
+ unsigned selector)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 buf[2];
+ int mV;
+
+ mV = spmi_regulator_common_list_voltage(rdev, selector) / 1000;
+
+ buf[0] = mV & 0xff;
+ buf[1] = mV >> 8;
+ return spmi_vreg_write(vreg, SPMI_FTSMPS426_REG_VOLTAGE_LSB, buf, 2);
+}
+
static int spmi_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector, unsigned int new_selector)
{
@@ -778,6 +839,16 @@ static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev)
return spmi_hw_selector_to_sw(vreg, voltage_sel, range);
}

+static int spmi_regulator_ftsmps426_get_voltage(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 buf[2];
+
+ spmi_vreg_read(vreg, SPMI_FTSMPS426_REG_VOLTAGE_LSB, buf, 2);
+
+ return (((unsigned int)buf[1] << 8) | (unsigned int)buf[0]) * 1000;
+}
+
static int spmi_regulator_single_map_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
@@ -923,6 +994,23 @@ static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
}
}

+static unsigned int spmi_regulator_ftsmps426_get_mode(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 reg;
+
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_MODE, &reg, 1);
+
+ switch (reg) {
+ case SPMI_FTSMPS426_MODE_HPM_MASK:
+ return REGULATOR_MODE_NORMAL;
+ case SPMI_FTSMPS426_MODE_AUTO_MASK:
+ return REGULATOR_MODE_FAST;
+ default:
+ return REGULATOR_MODE_IDLE;
+ }
+}
+
static int
spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
@@ -945,6 +1033,28 @@ spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
}

+static int
+spmi_regulator_ftsmps426_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 mask = SPMI_FTSMPS426_MODE_MASK;
+ u8 val;
+
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ val = SPMI_FTSMPS426_MODE_HPM_MASK;
+ break;
+ case REGULATOR_MODE_FAST:
+ val = SPMI_FTSMPS426_MODE_AUTO_MASK;
+ break;
+ default:
+ val = SPMI_FTSMPS426_MODE_LPM_MASK;
+ break;
+ }
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_MODE, val, mask);
+}
+
static int
spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
{
@@ -1274,6 +1384,21 @@ static struct regulator_ops spmi_ult_ldo_ops = {
.set_soft_start = spmi_regulator_common_set_soft_start,
};

+static struct regulator_ops spmi_ftsmps426_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .set_voltage_sel = spmi_regulator_ftsmps426_set_voltage,
+ .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel,
+ .get_voltage = spmi_regulator_ftsmps426_get_voltage,
+ .map_voltage = spmi_regulator_single_map_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_ftsmps426_set_mode,
+ .get_mode = spmi_regulator_ftsmps426_get_mode,
+ .set_load = spmi_regulator_common_set_load,
+ .set_pull_down = spmi_regulator_common_set_pull_down,
+};
+
/* Maximum possible digital major revision value */
#define INF 0xFF

@@ -1309,6 +1434,7 @@ static const struct spmi_regulator_mapping supported_regulators[] = {
SPMI_VREG(BOOST, 5V_BOOST, 0, INF, BOOST, boost, boost, 0),
SPMI_VREG(FTS, FTS_CTL, 0, INF, FTSMPS, ftsmps, ftsmps, 100000),
SPMI_VREG(FTS, FTS2p5_CTL, 0, INF, FTSMPS, ftsmps, ftsmps2p5, 100000),
+ SPMI_VREG(FTS, FTS426_CTL, 0, INF, FTSMPS426, ftsmps426, ftsmps426, 100000),
SPMI_VREG(BOOST_BYP, BB_2A, 0, INF, BOOST_BYP, boost, boost_byp, 0),
SPMI_VREG(ULT_BUCK, ULT_HF_CTL1, 0, INF, ULT_LO_SMPS, ult_lo_smps,
ult_lo_smps, 100000),
@@ -1446,6 +1572,34 @@ static int spmi_regulator_init_slew_rate(struct spmi_regulator *vreg)
return ret;
}

+static int spmi_regulator_init_slew_rate_ftsmps426(struct spmi_regulator *vreg)
+{
+ int ret;
+ u8 reg = 0;
+ int delay, slew_rate;
+ const struct spmi_voltage_range *range = &vreg->set_points->range[0];
+
+ ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_STEP_CTRL, &reg, 1);
+ if (ret) {
+ dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
+ return ret;
+ }
+
+ delay = reg & SPMI_FTSMPS426_STEP_CTRL_DELAY_MASK;
+ delay >>= SPMI_FTSMPS426_STEP_CTRL_DELAY_SHIFT;
+
+ /* slew_rate has units of uV/us */
+ slew_rate = SPMI_FTSMPS426_CLOCK_RATE * range->step_uV;
+ slew_rate /= 1000 * (SPMI_FTSMPS426_STEP_DELAY << delay);
+ slew_rate *= SPMI_FTSMPS426_STEP_MARGIN_NUM;
+ slew_rate /= SPMI_FTSMPS426_STEP_MARGIN_DEN;
+
+ /* Ensure that the slew rate is greater than 0 */
+ vreg->slew_rate = max(slew_rate, 1);
+
+ return ret;
+}
+
static int spmi_regulator_init_registers(struct spmi_regulator *vreg,
const struct spmi_regulator_init_data *data)
{
@@ -1585,6 +1739,12 @@ static int spmi_regulator_of_parse(struct device_node *node,
ret = spmi_regulator_init_slew_rate(vreg);
if (ret)
return ret;
+ break;
+ case SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS426:
+ ret = spmi_regulator_init_slew_rate_ftsmps426(vreg);
+ if (ret)
+ return ret;
+ break;
default:
break;
}
@@ -1741,7 +1901,16 @@ static const struct spmi_regulator_data pmi8994_regulators[] = {
{ }
};

+static const struct spmi_regulator_data pm8005_regulators[] = {
+ { "s1", 0x1400, "vdd_s1", },
+ { "s2", 0x1700, "vdd_s2", },
+ { "s3", 0x1a00, "vdd_s3", },
+ { "s4", 0x1d00, "vdd_s4", },
+ { }
+};
+
static const struct of_device_id qcom_spmi_regulator_match[] = {
+ { .compatible = "qcom,pm8005-regulators", .data = &pm8005_regulators },
{ .compatible = "qcom,pm8841-regulators", .data = &pm8841_regulators },
{ .compatible = "qcom,pm8916-regulators", .data = &pm8916_regulators },
{ .compatible = "qcom,pm8941-regulators", .data = &pm8941_regulators },
--
2.17.1