[PATCH v5 3/3] input: pm8xxx-vibrator: add new SPMI vibrator support

[Fenglin Wu <quic_fenglinw@quicinc.com>]

Add new SPMI vibrator module which is very similar to the SPMI vibrator
module inside PM8916 but just has a finer drive voltage step (1mV vs
100mV) hence its drive level control is expanded to across 2 registers.
The vibrator module can be found in Qualcomm PMIC PMI632, then following
PM7250B, PM7325B, PM7550BA PMICs.

Signed-off-by: Fenglin Wu <quic_fenglinw@quicinc.com>
Tested-by: Luca Weiss <luca.weiss@fairphone.com> # sdm632-fairphone-fp3 (pmi632)
---
 drivers/input/misc/pm8xxx-vibrator.c | 55 +++++++++++++++++++++++++---
 1 file changed, 50 insertions(+), 5 deletions(-)

diff --git a/drivers/input/misc/pm8xxx-vibrator.c b/drivers/input/misc/pm8xxx-vibrator.c
index d6b468324c77..990e8a9ac018 100644
--- a/drivers/input/misc/pm8xxx-vibrator.c
+++ b/drivers/input/misc/pm8xxx-vibrator.c
@@ -21,6 +21,13 @@
 #define SPMI_VIB_DRV_LEVEL_MASK		GENMASK(4, 0)
 #define SPMI_VIB_DRV_SHIFT		0
 
+#define SPMI_VIB_GEN2_DRV_REG		0x40
+#define SPMI_VIB_GEN2_DRV_MASK		GENMASK(7, 0)
+#define SPMI_VIB_GEN2_DRV_SHIFT		0
+#define SPMI_VIB_GEN2_DRV2_REG		0x41
+#define SPMI_VIB_GEN2_DRV2_MASK		GENMASK(3, 0)
+#define SPMI_VIB_GEN2_DRV2_SHIFT	8
+
 #define SPMI_VIB_EN_REG			0x46
 #define SPMI_VIB_EN_BIT			BIT(7)
 
@@ -33,12 +40,14 @@
 enum vib_hw_type {
 	SSBI_VIB,
 	SPMI_VIB,
+	SPMI_VIB_GEN2
 };
 
 struct pm8xxx_vib_data {
 	enum vib_hw_type	hw_type;
 	unsigned int		enable_addr;
 	unsigned int		drv_addr;
+	unsigned int		drv2_addr;
 };
 
 static const struct pm8xxx_vib_data ssbi_vib_data = {
@@ -52,6 +61,13 @@ static const struct pm8xxx_vib_data spmi_vib_data = {
 	.drv_addr	= SPMI_VIB_DRV_REG,
 };
 
+static const struct pm8xxx_vib_data spmi_vib_gen2_data = {
+	.hw_type	= SPMI_VIB_GEN2,
+	.enable_addr	= SPMI_VIB_EN_REG,
+	.drv_addr	= SPMI_VIB_GEN2_DRV_REG,
+	.drv2_addr	= SPMI_VIB_GEN2_DRV2_REG,
+};
+
 /**
  * struct pm8xxx_vib - structure to hold vibrator data
  * @vib_input_dev: input device supporting force feedback
@@ -85,12 +101,24 @@ static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
 {
 	int rc;
 	unsigned int val = vib->reg_vib_drv;
-	u32 mask = SPMI_VIB_DRV_LEVEL_MASK;
-	u32 shift = SPMI_VIB_DRV_SHIFT;
+	u32 mask, shift;
 
-	if (vib->data->hw_type == SSBI_VIB) {
+
+	switch (vib->data->hw_type) {
+	case SSBI_VIB:
 		mask = SSBI_VIB_DRV_LEVEL_MASK;
 		shift = SSBI_VIB_DRV_SHIFT;
+		break;
+	case SPMI_VIB:
+		mask = SPMI_VIB_DRV_LEVEL_MASK;
+		shift = SPMI_VIB_DRV_SHIFT;
+		break;
+	case SPMI_VIB_GEN2:
+		mask = SPMI_VIB_GEN2_DRV_MASK;
+		shift = SPMI_VIB_GEN2_DRV_SHIFT;
+		break;
+	default:
+		return -EINVAL;
 	}
 
 	if (on)
@@ -104,6 +132,19 @@ static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
 
 	vib->reg_vib_drv = val;
 
+	if (vib->data->hw_type == SPMI_VIB_GEN2) {
+		mask = SPMI_VIB_GEN2_DRV2_MASK;
+		shift = SPMI_VIB_GEN2_DRV2_SHIFT;
+		if (on)
+			val = (vib->level >> shift) & mask;
+		else
+			val = 0;
+		rc = regmap_update_bits(vib->regmap,
+				vib->reg_base + vib->data->drv2_addr, mask, val);
+		if (rc < 0)
+			return rc;
+	}
+
 	if (vib->data->hw_type == SSBI_VIB)
 		return 0;
 
@@ -128,10 +169,13 @@ static void pm8xxx_work_handler(struct work_struct *work)
 		vib->active = true;
 		vib->level = ((VIB_MAX_LEVELS * vib->speed) / MAX_FF_SPEED) +
 						VIB_MIN_LEVEL_mV;
-		vib->level /= 100;
+		if (vib->data->hw_type != SPMI_VIB_GEN2)
+			vib->level /= 100;
 	} else {
 		vib->active = false;
-		vib->level = VIB_MIN_LEVEL_mV / 100;
+		vib->level = VIB_MIN_LEVEL_mV;
+		if (vib->data->hw_type != SPMI_VIB_GEN2)
+			vib->level /= 100;
 	}
 
 	pm8xxx_vib_set(vib, vib->active);
@@ -266,6 +310,7 @@ static const struct of_device_id pm8xxx_vib_id_table[] = {
 	{ .compatible = "qcom,pm8058-vib", .data = &ssbi_vib_data },
 	{ .compatible = "qcom,pm8921-vib", .data = &ssbi_vib_data },
 	{ .compatible = "qcom,pm8916-vib", .data = &spmi_vib_data },
+	{ .compatible = "qcom,pmi632-vib", .data = &spmi_vib_gen2_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, pm8xxx_vib_id_table);
-- 
2.25.1