[PATCH 2/3] regulator: qcom_spmi: Add support for PM8005

Jeffrey Hugo
2019-05-21T16:53:15Z

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>
---
drivers/regulator/qcom_spmi-regulator.c | 203 +++++++++++++++++++++++-
1 file changed, 198 insertions(+), 5 deletions(-)

diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c
index 53a61fb65642..e4b89fbaf426 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_FTSMPS2,
};

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 +172,20 @@ enum spmi_common_regulator_registers {
SPMI_COMMON_REG_STEP_CTRL = 0x61,
};

+/*
+ * Second common register layout used by newer devices
+ * Note that some of the registers from the first common layout remain
+ * unchanged and their definition is not duplicated.
+ */
+enum qpnp_common2_regulator_registers {
+ SPMI_COMMON2_REG_VOLTAGE_LSB = 0x40,
+ SPMI_COMMON2_REG_VOLTAGE_MSB = 0x41,
+ SPMI_COMMON2_REG_MODE = 0x45,
+ SPMI_COMMON2_REG_STEP_CTRL = 0x61,
+ SPMI_COMMON2_REG_VOLTAGE_ULS_LSB = 0x68,
+ SPMI_COMMON2_REG_VOLTAGE_ULS_MSB = 0x69,
+};
+
enum spmi_vs_registers {
SPMI_VS_REG_OCP = 0x4a,
SPMI_VS_REG_SOFT_START = 0x4c,
@@ -229,6 +245,15 @@ enum spmi_common_control_register_index {
#define SPMI_COMMON_MODE_FOLLOW_HW_EN0_MASK 0x01
#define SPMI_COMMON_MODE_FOLLOW_ALL_MASK 0x1f

+/* Second common regulator mode register values */
+#define SPMI_COMMON2_MODE_BYPASS_MASK 3
+#define SPMI_COMMON2_MODE_RETENTION_MASK 4
+#define SPMI_COMMON2_MODE_LPM_MASK 5
+#define SPMI_COMMON2_MODE_AUTO_MASK 6
+#define SPMI_COMMON2_MODE_HPM_MASK 7
+
+#define SPMI_COMMON2_MODE_MASK 0x07
+
/* Common regulator pull down control register layout */
#define SPMI_COMMON_PULL_DOWN_ENABLE_MASK 0x80

@@ -274,6 +299,23 @@ enum spmi_common_control_register_index {
#define SPMI_FTSMPS_STEP_MARGIN_NUM 4
#define SPMI_FTSMPS_STEP_MARGIN_DEN 5

+#define SPMI_FTSMPS2_STEP_CTRL_DELAY_MASK 0x03
+#define SPMI_FTSMPS2_STEP_CTRL_DELAY_SHIFT 0
+
+/* Clock rate in kHz of the FTSMPS2 regulator reference clock. */
+#define SPMI_FTSMPS2_CLOCK_RATE 4800
+
+/* Minimum voltage stepper delay for each step. */
+#define SPMI_FTSMPS2_STEP_DELAY 2
+
+/*
+ * The ratio SPMI_FTSMPS2_STEP_MARGIN_NUM/SPMI_FTSMPS2_STEP_MARGIN_DEN is used
+ * to adjust the step rate in order to account for oscillator variance.
+ */
+#define SPMI_FTSMPS2_STEP_MARGIN_NUM 10
+#define SPMI_FTSMPS2_STEP_MARGIN_DEN 11
+
+
/* VSET value to decide the range of ULT SMPS */
#define ULT_SMPS_RANGE_SPLIT 0x60

@@ -447,6 +489,10 @@ 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 +526,7 @@ 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);
@@ -647,17 +694,31 @@ static int spmi_hw_selector_to_sw(struct spmi_regulator *vreg, u8 hw_sel,
static const struct spmi_voltage_range *
spmi_regulator_find_range(struct spmi_regulator *vreg)
{
- u8 range_sel;
+ int uV;
+ u8 range_sel, lsb, msb;
const struct spmi_voltage_range *range, *end;

range = vreg->set_points->range;
end = range + vreg->set_points->count;

- spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel, 1);
+ /* second common devices don't have VOLTAGE_RANGE register */
+ if (vreg->logical_type == SPMI_REGULATOR_LOGICAL_TYPE_FTSMPS2) {
+ spmi_vreg_read(vreg, SPMI_COMMON2_REG_VOLTAGE_LSB, &lsb, 1);
+ spmi_vreg_read(vreg, SPMI_COMMON2_REG_VOLTAGE_MSB, &msb, 1);
+
+ uV = (((int)msb << 8) | (int)lsb) * 1000;

- for (; range < end; range++)
- if (range->range_sel == range_sel)
- return range;
+ for (; range < end; range++)
+ if (range->min_uV <= uV && range->max_uV >= uV)
+ return range;
+ } else {
+ spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_RANGE, &range_sel,
+ 1);
+
+ for (; range < end; range++)
+ if (range->range_sel == range_sel)
+ return range;
+ }

return NULL;
}
@@ -747,6 +808,23 @@ 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_common2_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) & 0xff;
+ return spmi_vreg_write(vreg, SPMI_COMMON2_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 +856,17 @@ 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_common2_get_voltage(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 lsb, msb;
+
+ spmi_vreg_read(vreg, SPMI_COMMON2_REG_VOLTAGE_LSB, &lsb, 1);
+ spmi_vreg_read(vreg, SPMI_COMMON2_REG_VOLTAGE_MSB, &msb, 1);
+
+ return (((int)msb << 8) | (int)lsb) * 1000;
+}
+
static int spmi_regulator_single_map_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
@@ -920,6 +1009,22 @@ static unsigned int spmi_regulator_common_get_mode(struct regulator_dev *rdev)
return REGULATOR_MODE_IDLE;
}

+static unsigned int spmi_regulator_common2_get_mode(struct regulator_dev *rdev)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 reg;
+
+ spmi_vreg_read(vreg, SPMI_COMMON2_REG_MODE, &reg, 1);
+
+ if (reg == SPMI_COMMON2_MODE_HPM_MASK)
+ return REGULATOR_MODE_NORMAL;
+
+ if (reg == SPMI_COMMON2_MODE_AUTO_MASK)
+ return REGULATOR_MODE_FAST;
+
+ return REGULATOR_MODE_IDLE;
+}
+
static int
spmi_regulator_common_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
@@ -935,6 +1040,21 @@ 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_common2_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ u8 mask = SPMI_COMMON2_MODE_MASK;
+ u8 val = SPMI_COMMON2_MODE_LPM_MASK;
+
+ if (mode == REGULATOR_MODE_NORMAL)
+ val = SPMI_COMMON2_MODE_HPM_MASK;
+ else if (mode == REGULATOR_MODE_FAST)
+ val = SPMI_COMMON2_MODE_AUTO_MASK;
+
+ return spmi_vreg_update_bits(vreg, SPMI_COMMON2_REG_MODE, val, mask);
+}
+
static int
spmi_regulator_common_set_load(struct regulator_dev *rdev, int load_uA)
{
@@ -1264,6 +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_common2_set_voltage,
+ .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel,
+ .get_voltage_sel = spmi_regulator_common2_get_voltage,
+ .map_voltage = spmi_regulator_common_map_voltage,
+ .list_voltage = spmi_regulator_common_list_voltage,
+ .set_mode = spmi_regulator_common2_set_mode,
+ .get_mode = spmi_regulator_common2_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

@@ -1299,6 +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, FTSMPS2, 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),
@@ -1436,6 +1572,48 @@ static int spmi_regulator_init_slew_rate(struct spmi_regulator *vreg)
return ret;
}

+/* slew rate init for common register layout #2 */
+static int spmi_regulator_init_slew_rate2(struct spmi_regulator *vreg)
+{
+ int ret, i;
+ u8 reg = 0;
+ int delay, slew_rate;
+ const struct spmi_voltage_range *range = NULL;
+
+ ret = spmi_vreg_read(vreg, SPMI_COMMON2_REG_STEP_CTRL, &reg, 1);
+ if (ret) {
+ dev_err(vreg->dev, "spmi read failed, ret=%d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Regulators using the common #2 register layout do not have a voltage
+ * range select register. Choose the lowest possible step size to be
+ * conservative in the slew rate calculation.
+ */
+ for (i = 0; i < vreg->set_points->count; i++)
+ if (!range || vreg->set_points->range[i].step_uV <
+ range->step_uV)
+ range = &vreg->set_points->range[i];
+
+ if (!range)
+ return -EINVAL;
+
+ delay = reg & SPMI_FTSMPS2_STEP_CTRL_DELAY_MASK;
+ delay >>= SPMI_FTSMPS2_STEP_CTRL_DELAY_SHIFT;
+
+ /* slew_rate has units of uV/us */
+ slew_rate = SPMI_FTSMPS2_CLOCK_RATE * range->step_uV;
+ slew_rate /= 1000 * (SPMI_FTSMPS2_STEP_DELAY << delay);
+ slew_rate *= SPMI_FTSMPS2_STEP_MARGIN_NUM;
+ slew_rate /= SPMI_FTSMPS2_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)
{
@@ -1575,6 +1753,12 @@ 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_FTSMPS2:
+ ret = spmi_regulator_init_slew_rate2(vreg);
+ if (ret)
+ return ret;
+ break;
default:
break;
}
@@ -1731,7 +1915,16 @@ 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