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From: Fenglin Wu via B4 Relay <devnull+quic_fenglinw.quicinc.com@kernel.org>
Date: Fri, 12 Apr 2024 20:36:28 +0800
Subject: [PATCH v10 4/4] input: pm8xxx-vibrator: add new SPMI vibrator
 support
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Message-Id: <20240412-pm8xxx-vibrator-new-design-v10-4-0ec0ad133866@quicinc.com>
References: <20240412-pm8xxx-vibrator-new-design-v10-0-0ec0ad133866@quicinc.com>
In-Reply-To: <20240412-pm8xxx-vibrator-new-design-v10-0-0ec0ad133866@quicinc.com>
To: kernel@quicinc.com, Andy Gross <agross@kernel.org>, 
 Bjorn Andersson <andersson@kernel.org>, 
 Konrad Dybcio <konrad.dybcio@linaro.org>, 
 Dmitry Torokhov <dmitry.torokhov@gmail.com>, 
 Rob Herring <robh+dt@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: linux-arm-msm@vger.kernel.org, linux-input@vger.kernel.org, 
 linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, 
 Fenglin Wu <quic_fenglinw@quicinc.com>
Reply-To: quic_fenglinw@quicinc.com

From: Fenglin Wu <quic_fenglinw@quicinc.com>

Add support for a new SPMI vibrator module which is very similar
to the vibrator module inside PM8916 but has a finer drive voltage
step and different output voltage range, its drive level control
is expanded across 2 registers. The vibrator module can be found
in following Qualcomm PMICs: PMI632, PM7250B, PM7325B, PM7550BA.

Signed-off-by: Fenglin Wu <quic_fenglinw@quicinc.com>
---
 drivers/input/misc/pm8xxx-vibrator.c | 55 ++++++++++++++++++++++++++++++------
 1 file changed, 46 insertions(+), 9 deletions(-)

diff --git a/drivers/input/misc/pm8xxx-vibrator.c b/drivers/input/misc/pm8xxx-vibrator.c
index 640927f94143..8b9d757d650f 100644
--- a/drivers/input/misc/pm8xxx-vibrator.c
+++ b/drivers/input/misc/pm8xxx-vibrator.c
@@ -12,10 +12,11 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 
-#define VIB_MAX_LEVEL_mV	(3100)
-#define VIB_MIN_LEVEL_mV	(1200)
-#define VIB_PER_STEP_mV		(100)
-#define VIB_MAX_LEVELS		(VIB_MAX_LEVEL_mV - VIB_MIN_LEVEL_mV + VIB_PER_STEP_mV)
+#define VIB_MAX_LEVEL_mV(vib)	(vib->drv2_addr ? 3544 : 3100)
+#define VIB_MIN_LEVEL_mV(vib)	(vib->drv2_addr ? 1504 : 1200)
+#define VIB_PER_STEP_mV(vib)	(vib->drv2_addr ? 8 : 100)
+#define VIB_MAX_LEVELS(vib) \
+	(VIB_MAX_LEVEL_mV(vib) - VIB_MIN_LEVEL_mV(vib) + VIB_PER_STEP_mV(vib))
 
 #define MAX_FF_SPEED		0xff
 
@@ -26,7 +27,11 @@ struct pm8xxx_regs {
 	unsigned int drv_offset;
 	unsigned int drv_mask;
 	unsigned int drv_shift;
+	unsigned int drv2_offset;
+	unsigned int drv2_mask;
+	unsigned int drv2_shift;
 	unsigned int drv_en_manual_mask;
+	bool	     drv_in_step;
 };
 
 static const struct pm8xxx_regs pm8058_regs = {
@@ -34,6 +39,7 @@ static const struct pm8xxx_regs pm8058_regs = {
 	.drv_mask = 0xf8,
 	.drv_shift = 3,
 	.drv_en_manual_mask = 0xfc,
+	.drv_in_step = true,
 };
 
 static struct pm8xxx_regs pm8916_regs = {
@@ -43,6 +49,20 @@ static struct pm8xxx_regs pm8916_regs = {
 	.drv_mask = 0x1f,
 	.drv_shift = 0,
 	.drv_en_manual_mask = 0,
+	.drv_in_step = true,
+};
+
+static struct pm8xxx_regs pmi632_regs = {
+	.enable_offset = 0x46,
+	.enable_mask = BIT(7),
+	.drv_offset = 0x40,
+	.drv_mask = GENMASK(7, 0),
+	.drv_shift = 0,
+	.drv2_offset = 0x41,
+	.drv2_mask = GENMASK(3, 0),
+	.drv2_shift = 8,
+	.drv_en_manual_mask = 0,
+	.drv_in_step = false,
 };
 
 /**
@@ -53,6 +73,7 @@ static struct pm8xxx_regs pm8916_regs = {
  * @regs: registers' info
  * @enable_addr: vibrator enable register
  * @drv_addr: vibrator drive strength register
+ * @drv2_addr: vibrator drive strength upper byte register
  * @speed: speed of vibration set from userland
  * @active: state of vibrator
  * @level: level of vibration to set in the chip
@@ -65,6 +86,7 @@ struct pm8xxx_vib {
 	const struct pm8xxx_regs *regs;
 	unsigned int enable_addr;
 	unsigned int drv_addr;
+	unsigned int drv2_addr;
 	int speed;
 	int level;
 	bool active;
@@ -82,6 +104,9 @@ static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
 	unsigned int val = vib->reg_vib_drv;
 	const struct pm8xxx_regs *regs = vib->regs;
 
+	if (regs->drv_in_step)
+		vib->level /= VIB_PER_STEP_mV(vib);
+
 	if (on)
 		val |= (vib->level << regs->drv_shift) & regs->drv_mask;
 	else
@@ -93,6 +118,17 @@ static int pm8xxx_vib_set(struct pm8xxx_vib *vib, bool on)
 
 	vib->reg_vib_drv = val;
 
+	if (regs->drv2_mask) {
+		if (on)
+			val = (vib->level << regs->drv2_shift) & regs->drv2_mask;
+		else
+			val = 0;
+
+		rc = regmap_write_bits(vib->regmap, vib->drv2_addr, regs->drv2_mask, val);
+		if (rc < 0)
+			return rc;
+	}
+
 	if (regs->enable_mask)
 		rc = regmap_update_bits(vib->regmap, vib->enable_addr,
 					regs->enable_mask, on ? regs->enable_mask : 0);
@@ -115,17 +151,16 @@ static void pm8xxx_work_handler(struct work_struct *work)
 		return;
 
 	/*
-	 * pmic vibrator supports voltage ranges from 1.2 to 3.1V, so
+	 * pmic vibrator supports voltage ranges from MIN_LEVEL to MAX_LEVEL, so
 	 * scale the level to fit into these ranges.
 	 */
 	if (vib->speed) {
 		vib->active = true;
-		vib->level = ((VIB_MAX_LEVELS * vib->speed) / MAX_FF_SPEED) +
-						VIB_MIN_LEVEL_mV;
-		vib->level /= VIB_PER_STEP_mV;
+		vib->level = VIB_MIN_LEVEL_mV(vib);
+		vib->level += mult_frac(VIB_MAX_LEVELS(vib), vib->speed, MAX_FF_SPEED);
 	} else {
 		vib->active = false;
-		vib->level = VIB_MIN_LEVEL_mV / VIB_PER_STEP_mV;
+		vib->level = VIB_MIN_LEVEL_mV(vib);
 	}
 
 	pm8xxx_vib_set(vib, vib->active);
@@ -200,6 +235,7 @@ static int pm8xxx_vib_probe(struct platform_device *pdev)
 	regs = of_device_get_match_data(&pdev->dev);
 	vib->enable_addr = reg_base + regs->enable_offset;
 	vib->drv_addr = reg_base + regs->drv_offset;
+	vib->drv2_addr = reg_base + regs->drv2_offset;
 
 	/* operate in manual mode */
 	error = regmap_read(vib->regmap, vib->drv_addr, &val);
@@ -254,6 +290,7 @@ static const struct of_device_id pm8xxx_vib_id_table[] = {
 	{ .compatible = "qcom,pm8058-vib", .data = &pm8058_regs },
 	{ .compatible = "qcom,pm8921-vib", .data = &pm8058_regs },
 	{ .compatible = "qcom,pm8916-vib", .data = &pm8916_regs },
+	{ .compatible = "qcom,pmi632-vib", .data = &pmi632_regs },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, pm8xxx_vib_id_table);

-- 
2.25.1