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-rw-r--r--drivers/regulator/qcom_spmi-regulator.c133
1 files changed, 130 insertions, 3 deletions
diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c
index 63c7a0c17777..9817f1a75342 100644
--- a/drivers/regulator/qcom_spmi-regulator.c
+++ b/drivers/regulator/qcom_spmi-regulator.c
@@ -25,6 +25,8 @@
#include <linux/regulator/driver.h>
#include <linux/regmap.h>
#include <linux/list.h>
+#include <linux/mfd/syscon.h>
+#include <linux/io.h>
/* Pin control enable input pins. */
#define SPMI_REGULATOR_PIN_CTRL_ENABLE_NONE 0x00
@@ -181,6 +183,23 @@ enum spmi_boost_byp_registers {
SPMI_BOOST_BYP_REG_CURRENT_LIMIT = 0x4b,
};
+enum spmi_saw3_registers {
+ SAW3_SECURE = 0x00,
+ SAW3_ID = 0x04,
+ SAW3_SPM_STS = 0x0C,
+ SAW3_AVS_STS = 0x10,
+ SAW3_PMIC_STS = 0x14,
+ SAW3_RST = 0x18,
+ SAW3_VCTL = 0x1C,
+ SAW3_AVS_CTL = 0x20,
+ SAW3_AVS_LIMIT = 0x24,
+ SAW3_AVS_DLY = 0x28,
+ SAW3_AVS_HYSTERESIS = 0x2C,
+ SAW3_SPM_STS2 = 0x38,
+ SAW3_SPM_PMIC_DATA_3 = 0x4C,
+ SAW3_VERSION = 0xFD0,
+};
+
/* Used for indexing into ctrl_reg. These are offets from 0x40 */
enum spmi_common_control_register_index {
SPMI_COMMON_IDX_VOLTAGE_RANGE = 0,
@@ -1035,6 +1054,89 @@ static irqreturn_t spmi_regulator_vs_ocp_isr(int irq, void *data)
return IRQ_HANDLED;
}
+#define SAW3_VCTL_DATA_MASK 0xFF
+#define SAW3_VCTL_CLEAR_MASK 0x700FF
+#define SAW3_AVS_CTL_EN_MASK 0x1
+#define SAW3_AVS_CTL_TGGL_MASK 0x8000000
+#define SAW3_AVS_CTL_CLEAR_MASK 0x7efc00
+
+static struct regmap *saw_regmap = NULL;
+
+static void spmi_saw_set_vdd(void *data)
+{
+ u32 vctl, data3, avs_ctl, pmic_sts;
+ bool avs_enabled = false;
+ unsigned long timeout;
+ u8 voltage_sel = *(u8 *)data;
+
+ regmap_read(saw_regmap, SAW3_AVS_CTL, &avs_ctl);
+ regmap_read(saw_regmap, SAW3_VCTL, &vctl);
+ regmap_read(saw_regmap, SAW3_SPM_PMIC_DATA_3, &data3);
+
+ /* select the band */
+ vctl &= ~SAW3_VCTL_CLEAR_MASK;
+ vctl |= (u32)voltage_sel;
+
+ data3 &= ~SAW3_VCTL_CLEAR_MASK;
+ data3 |= (u32)voltage_sel;
+
+ /* If AVS is enabled, switch it off during the voltage change */
+ avs_enabled = SAW3_AVS_CTL_EN_MASK & avs_ctl;
+ if (avs_enabled) {
+ avs_ctl &= ~SAW3_AVS_CTL_TGGL_MASK;
+ regmap_write(saw_regmap, SAW3_AVS_CTL, avs_ctl);
+ }
+
+ regmap_write(saw_regmap, SAW3_RST, 1);
+ regmap_write(saw_regmap, SAW3_VCTL, vctl);
+ regmap_write(saw_regmap, SAW3_SPM_PMIC_DATA_3, data3);
+
+ timeout = jiffies + usecs_to_jiffies(100);
+ do {
+ regmap_read(saw_regmap, SAW3_PMIC_STS, &pmic_sts);
+ pmic_sts &= SAW3_VCTL_DATA_MASK;
+ if (pmic_sts == (u32)voltage_sel)
+ break;
+
+ cpu_relax();
+
+ } while (time_before(jiffies, timeout));
+
+ /* After successful voltage change, switch the AVS back on */
+ if (avs_enabled) {
+ pmic_sts &= 0x3f;
+ avs_ctl &= ~SAW3_AVS_CTL_CLEAR_MASK;
+ avs_ctl |= ((pmic_sts - 4) << 10);
+ avs_ctl |= (pmic_sts << 17);
+ avs_ctl |= SAW3_AVS_CTL_TGGL_MASK;
+ regmap_write(saw_regmap, SAW3_AVS_CTL, avs_ctl);
+ }
+}
+
+static int
+spmi_regulator_saw_set_voltage(struct regulator_dev *rdev, unsigned selector)
+{
+ struct spmi_regulator *vreg = rdev_get_drvdata(rdev);
+ int ret;
+ u8 range_sel, voltage_sel;
+
+ ret = spmi_sw_selector_to_hw(vreg, selector, &range_sel, &voltage_sel);
+ if (ret)
+ return ret;
+
+ if (0 != range_sel) {
+ dev_dbg(&rdev->dev, "range_sel = %02X voltage_sel = %02X", \
+ range_sel, voltage_sel);
+ return -EINVAL;
+ }
+
+ /* Always do the SAW register writes on the first CPU */
+ return smp_call_function_single(0, spmi_saw_set_vdd, \
+ &voltage_sel, true);
+}
+
+static struct regulator_ops spmi_saw_ops = {};
+
static struct regulator_ops spmi_smps_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
@@ -1250,6 +1352,7 @@ static int spmi_regulator_match(struct spmi_regulator *vreg, u16 force_type)
}
dig_major_rev = version[SPMI_COMMON_REG_DIG_MAJOR_REV
- SPMI_COMMON_REG_DIG_MAJOR_REV];
+
if (!force_type) {
type = version[SPMI_COMMON_REG_TYPE -
SPMI_COMMON_REG_DIG_MAJOR_REV];
@@ -1648,7 +1751,9 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
struct regmap *regmap;
const char *name;
struct device *dev = &pdev->dev;
- int ret;
+ struct device_node *node = pdev->dev.of_node;
+ struct device_node *syscon;
+ int ret, lenp;
struct list_head *vreg_list;
vreg_list = devm_kzalloc(dev, sizeof(*vreg_list), GFP_KERNEL);
@@ -1665,7 +1770,22 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
if (!match)
return -ENODEV;
+ if (of_find_property(node, "qcom,saw-reg", &lenp)) {
+ syscon = of_parse_phandle(node, "qcom,saw-reg", 0);
+ saw_regmap = syscon_node_to_regmap(syscon);
+ of_node_put(syscon);
+ if (IS_ERR(regmap))
+ dev_err(dev, "ERROR reading SAW regmap\n");
+ }
+
for (reg = match->data; reg->name; reg++) {
+
+ if (saw_regmap && \
+ of_find_property(of_find_node_by_name(node, reg->name), \
+ "qcom,saw-slave", &lenp)) {
+ continue;
+ }
+
vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
if (!vreg)
return -ENOMEM;
@@ -1673,7 +1793,6 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
vreg->dev = dev;
vreg->base = reg->base;
vreg->regmap = regmap;
-
if (reg->ocp) {
vreg->ocp_irq = platform_get_irq_byname(pdev, reg->ocp);
if (vreg->ocp_irq < 0) {
@@ -1681,7 +1800,6 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
goto err;
}
}
-
vreg->desc.id = -1;
vreg->desc.owner = THIS_MODULE;
vreg->desc.type = REGULATOR_VOLTAGE;
@@ -1698,6 +1816,15 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
if (ret)
continue;
+ if (saw_regmap && \
+ of_find_property(of_find_node_by_name(node, reg->name), \
+ "qcom,saw-leader", &lenp)) {
+ spmi_saw_ops = *(vreg->desc.ops);
+ spmi_saw_ops.set_voltage_sel = \
+ spmi_regulator_saw_set_voltage;
+ vreg->desc.ops = &spmi_saw_ops;
+ }
+
config.dev = dev;
config.driver_data = vreg;
config.regmap = regmap;