[PATCH v2 0/2] Input: remove msm-vibrator driver and bindings

[PATCH v2 0/2] Input: remove msm-vibrator driver and bindings

[Brian Masney]

Here's a small patch series that removes the msm-vibrator driver and
bindings. These two patches are broken out from this patch series:

https://lore.kernel.org/lkml/20191205002503.13088-5-masneyb@onstation.org/

In a nutshell, I'm waiting for someone from Qualcomm to either post a
patch to support setting the clock duty cycle or someone to post
information about the m,n,d registers for the clocks. Once that's done,
no other changes should be needed in the input subsystem.

In the mean time, the msm-vibrator driver needs to be removed from
upstream.

Changes since v1:
- Updated commit messages to remove references to clk-vibrator.

Brian Masney (2):
  dt-bindings: Input: remove msm-vibrator
  Input: remove msm-vibrator driver

 .../bindings/input/msm-vibrator.txt           |  36 ---
 drivers/input/misc/Kconfig                    |  10 -
 drivers/input/misc/Makefile                   |   1 -
 drivers/input/misc/msm-vibrator.c             | 281 ------------------
 4 files changed, 328 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/input/msm-vibrator.txt
 delete mode 100644 drivers/input/misc/msm-vibrator.c

-- 
2.24.1

[PATCH v2 1/2] dt-bindings: Input: remove msm-vibrator

[Brian Masney]

The address referenced in this binding is within the Qualcomm Clock
namespace so let's drop the msm-vibrator bindings so that a more
generic solution can be used instead.  No one is currently using these
bindings so this won't affect any users.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../bindings/input/msm-vibrator.txt           | 36 -------------------
 1 file changed, 36 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/input/msm-vibrator.txt

diff --git a/Documentation/devicetree/bindings/input/msm-vibrator.txt b/Documentation/devicetree/bindings/input/msm-vibrator.txt
deleted file mode 100644
index 8dcf014ef2e5..000000000000
--- a/Documentation/devicetree/bindings/input/msm-vibrator.txt
+++ /dev/null
@@ -1,36 +0,0 @@
-* Device tree bindings for the Qualcomm MSM vibrator
-
-Required properties:
-
-  - compatible: Should be one of
-		"qcom,msm8226-vibrator"
-		"qcom,msm8974-vibrator"
-  - reg: the base address and length of the IO memory for the registers.
-  - pinctrl-names: set to default.
-  - pinctrl-0: phandles pointing to pin configuration nodes. See
-               Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
-  - clock-names: set to pwm
-  - clocks: phandle of the clock. See
-            Documentation/devicetree/bindings/clock/clock-bindings.txt
-  - enable-gpios: GPIO that enables the vibrator.
-
-Optional properties:
-
-  - vcc-supply: phandle to the regulator that provides power to the sensor.
-
-Example from a LG Nexus 5 (hammerhead) phone:
-
-vibrator@fd8c3450 {
-	reg = <0xfd8c3450 0x400>;
-	compatible = "qcom,msm8974-vibrator";
-
-	vcc-supply = <&pm8941_l19>;
-
-	clocks = <&mmcc CAMSS_GP1_CLK>;
-	clock-names = "pwm";
-
-	enable-gpios = <&msmgpio 60 GPIO_ACTIVE_HIGH>;
-
-	pinctrl-names = "default";
-	pinctrl-0 = <&vibrator_pin>;
-};
-- 
2.24.1

[PATCH v2 2/2] Input: remove msm-vibrator driver

[Brian Masney]

The address referenced by this driver is within the Qualcomm Clock
namespace so let's drop the msm-vibrator bindings so that a more generic
solution can be used instead.  No one is currently using driver so this
won't affect any users.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/input/misc/Kconfig        |  10 --
 drivers/input/misc/Makefile       |   1 -
 drivers/input/misc/msm-vibrator.c | 281 ------------------------------
 3 files changed, 292 deletions(-)
 delete mode 100644 drivers/input/misc/msm-vibrator.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 7e2e658d551c..b56da7a5efb9 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -117,16 +117,6 @@ config INPUT_E3X0_BUTTON
 	  To compile this driver as a module, choose M here: the
 	  module will be called e3x0_button.
 
-config INPUT_MSM_VIBRATOR
-	tristate "Qualcomm MSM vibrator driver"
-	select INPUT_FF_MEMLESS
-	help
-	  Support for the vibrator that is found on various Qualcomm MSM
-	  SOCs.
-
-	  To compile this driver as a module, choose M here: the module
-	  will be called msm_vibrator.
-
 config INPUT_PCSPKR
 	tristate "PC Speaker support"
 	depends on PCSPKR_PLATFORM
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 8fd187f314bd..e6768b61a955 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -50,7 +50,6 @@ obj-$(CONFIG_INPUT_MAX8925_ONKEY)	+= max8925_onkey.o
 obj-$(CONFIG_INPUT_MAX8997_HAPTIC)	+= max8997_haptic.o
 obj-$(CONFIG_INPUT_MC13783_PWRBUTTON)	+= mc13783-pwrbutton.o
 obj-$(CONFIG_INPUT_MMA8450)		+= mma8450.o
-obj-$(CONFIG_INPUT_MSM_VIBRATOR)	+= msm-vibrator.o
 obj-$(CONFIG_INPUT_PALMAS_PWRBUTTON)	+= palmas-pwrbutton.o
 obj-$(CONFIG_INPUT_PCAP)		+= pcap_keys.o
 obj-$(CONFIG_INPUT_PCF50633_PMU)	+= pcf50633-input.o
diff --git a/drivers/input/misc/msm-vibrator.c b/drivers/input/misc/msm-vibrator.c
deleted file mode 100644
index b60f1aaee705..000000000000
--- a/drivers/input/misc/msm-vibrator.c
+++ /dev/null
@@ -1,281 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Qualcomm MSM vibrator driver
- *
- * Copyright (c) 2018 Brian Masney <masneyb@onstation.org>
- *
- * Based on qcom,pwm-vibrator.c from:
- * Copyright (c) 2018 Jonathan Marek <jonathan@marek.ca>
- *
- * Based on msm_pwm_vibrator.c from downstream Android sources:
- * Copyright (C) 2009-2014 LGE, Inc.
- */
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/gpio/consumer.h>
-#include <linux/input.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/regulator/consumer.h>
-
-#define REG_CMD_RCGR           0x00
-#define REG_CFG_RCGR           0x04
-#define REG_M                  0x08
-#define REG_N                  0x0C
-#define REG_D                  0x10
-#define REG_CBCR               0x24
-#define MMSS_CC_M_DEFAULT      1
-
-struct msm_vibrator {
-	struct input_dev *input;
-	struct mutex mutex;
-	struct work_struct worker;
-	void __iomem *base;
-	struct regulator *vcc;
-	struct clk *clk;
-	struct gpio_desc *enable_gpio;
-	u16 magnitude;
-	bool enabled;
-};
-
-static void msm_vibrator_write(struct msm_vibrator *vibrator, int offset,
-			       u32 value)
-{
-	writel(value, vibrator->base + offset);
-}
-
-static int msm_vibrator_start(struct msm_vibrator *vibrator)
-{
-	int d_reg_val, ret = 0;
-
-	mutex_lock(&vibrator->mutex);
-
-	if (!vibrator->enabled) {
-		ret = clk_set_rate(vibrator->clk, 24000);
-		if (ret) {
-			dev_err(&vibrator->input->dev,
-				"Failed to set clock rate: %d\n", ret);
-			goto unlock;
-		}
-
-		ret = clk_prepare_enable(vibrator->clk);
-		if (ret) {
-			dev_err(&vibrator->input->dev,
-				"Failed to enable clock: %d\n", ret);
-			goto unlock;
-		}
-
-		ret = regulator_enable(vibrator->vcc);
-		if (ret) {
-			dev_err(&vibrator->input->dev,
-				"Failed to enable regulator: %d\n", ret);
-			clk_disable(vibrator->clk);
-			goto unlock;
-		}
-
-		gpiod_set_value_cansleep(vibrator->enable_gpio, 1);
-
-		vibrator->enabled = true;
-	}
-
-	d_reg_val = 127 - ((126 * vibrator->magnitude) / 0xffff);
-	msm_vibrator_write(vibrator, REG_CFG_RCGR,
-			   (2 << 12) | /* dual edge mode */
-			   (0 << 8) |  /* cxo */
-			   (7 << 0));
-	msm_vibrator_write(vibrator, REG_M, 1);
-	msm_vibrator_write(vibrator, REG_N, 128);
-	msm_vibrator_write(vibrator, REG_D, d_reg_val);
-	msm_vibrator_write(vibrator, REG_CMD_RCGR, 1);
-	msm_vibrator_write(vibrator, REG_CBCR, 1);
-
-unlock:
-	mutex_unlock(&vibrator->mutex);
-
-	return ret;
-}
-
-static void msm_vibrator_stop(struct msm_vibrator *vibrator)
-{
-	mutex_lock(&vibrator->mutex);
-
-	if (vibrator->enabled) {
-		gpiod_set_value_cansleep(vibrator->enable_gpio, 0);
-		regulator_disable(vibrator->vcc);
-		clk_disable(vibrator->clk);
-		vibrator->enabled = false;
-	}
-
-	mutex_unlock(&vibrator->mutex);
-}
-
-static void msm_vibrator_worker(struct work_struct *work)
-{
-	struct msm_vibrator *vibrator = container_of(work,
-						     struct msm_vibrator,
-						     worker);
-
-	if (vibrator->magnitude)
-		msm_vibrator_start(vibrator);
-	else
-		msm_vibrator_stop(vibrator);
-}
-
-static int msm_vibrator_play_effect(struct input_dev *dev, void *data,
-				    struct ff_effect *effect)
-{
-	struct msm_vibrator *vibrator = input_get_drvdata(dev);
-
-	mutex_lock(&vibrator->mutex);
-
-	if (effect->u.rumble.strong_magnitude > 0)
-		vibrator->magnitude = effect->u.rumble.strong_magnitude;
-	else
-		vibrator->magnitude = effect->u.rumble.weak_magnitude;
-
-	mutex_unlock(&vibrator->mutex);
-
-	schedule_work(&vibrator->worker);
-
-	return 0;
-}
-
-static void msm_vibrator_close(struct input_dev *input)
-{
-	struct msm_vibrator *vibrator = input_get_drvdata(input);
-
-	cancel_work_sync(&vibrator->worker);
-	msm_vibrator_stop(vibrator);
-}
-
-static int msm_vibrator_probe(struct platform_device *pdev)
-{
-	struct msm_vibrator *vibrator;
-	struct resource *res;
-	int ret;
-
-	vibrator = devm_kzalloc(&pdev->dev, sizeof(*vibrator), GFP_KERNEL);
-	if (!vibrator)
-		return -ENOMEM;
-
-	vibrator->input = devm_input_allocate_device(&pdev->dev);
-	if (!vibrator->input)
-		return -ENOMEM;
-
-	vibrator->vcc = devm_regulator_get(&pdev->dev, "vcc");
-	if (IS_ERR(vibrator->vcc)) {
-		if (PTR_ERR(vibrator->vcc) != -EPROBE_DEFER)
-			dev_err(&pdev->dev, "Failed to get regulator: %ld\n",
-				PTR_ERR(vibrator->vcc));
-		return PTR_ERR(vibrator->vcc);
-	}
-
-	vibrator->enable_gpio = devm_gpiod_get(&pdev->dev, "enable",
-					       GPIOD_OUT_LOW);
-	if (IS_ERR(vibrator->enable_gpio)) {
-		if (PTR_ERR(vibrator->enable_gpio) != -EPROBE_DEFER)
-			dev_err(&pdev->dev, "Failed to get enable gpio: %ld\n",
-				PTR_ERR(vibrator->enable_gpio));
-		return PTR_ERR(vibrator->enable_gpio);
-	}
-
-	vibrator->clk = devm_clk_get(&pdev->dev, "pwm");
-	if (IS_ERR(vibrator->clk)) {
-		if (PTR_ERR(vibrator->clk) != -EPROBE_DEFER)
-			dev_err(&pdev->dev, "Failed to lookup pwm clock: %ld\n",
-				PTR_ERR(vibrator->clk));
-		return PTR_ERR(vibrator->clk);
-	}
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get platform resource\n");
-		return -ENODEV;
-	}
-
-	vibrator->base = devm_ioremap(&pdev->dev, res->start,
-				     resource_size(res));
-	if (!vibrator->base) {
-		dev_err(&pdev->dev, "Failed to iomap resource.\n");
-		return -ENOMEM;
-	}
-
-	vibrator->enabled = false;
-	mutex_init(&vibrator->mutex);
-	INIT_WORK(&vibrator->worker, msm_vibrator_worker);
-
-	vibrator->input->name = "msm-vibrator";
-	vibrator->input->id.bustype = BUS_HOST;
-	vibrator->input->close = msm_vibrator_close;
-
-	input_set_drvdata(vibrator->input, vibrator);
-	input_set_capability(vibrator->input, EV_FF, FF_RUMBLE);
-
-	ret = input_ff_create_memless(vibrator->input, NULL,
-				      msm_vibrator_play_effect);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to create ff memless: %d", ret);
-		return ret;
-	}
-
-	ret = input_register_device(vibrator->input);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to register input device: %d", ret);
-		return ret;
-	}
-
-	platform_set_drvdata(pdev, vibrator);
-
-	return 0;
-}
-
-static int __maybe_unused msm_vibrator_suspend(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct msm_vibrator *vibrator = platform_get_drvdata(pdev);
-
-	cancel_work_sync(&vibrator->worker);
-
-	if (vibrator->enabled)
-		msm_vibrator_stop(vibrator);
-
-	return 0;
-}
-
-static int __maybe_unused msm_vibrator_resume(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct msm_vibrator *vibrator = platform_get_drvdata(pdev);
-
-	if (vibrator->enabled)
-		msm_vibrator_start(vibrator);
-
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(msm_vibrator_pm_ops, msm_vibrator_suspend,
-			 msm_vibrator_resume);
-
-static const struct of_device_id msm_vibrator_of_match[] = {
-	{ .compatible = "qcom,msm8226-vibrator" },
-	{ .compatible = "qcom,msm8974-vibrator" },
-	{},
-};
-MODULE_DEVICE_TABLE(of, msm_vibrator_of_match);
-
-static struct platform_driver msm_vibrator_driver = {
-	.probe	= msm_vibrator_probe,
-	.driver	= {
-		.name = "msm-vibrator",
-		.pm = &msm_vibrator_pm_ops,
-		.of_match_table = of_match_ptr(msm_vibrator_of_match),
-	},
-};
-module_platform_driver(msm_vibrator_driver);
-
-MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
-MODULE_DESCRIPTION("Qualcomm MSM vibrator driver");
-MODULE_LICENSE("GPL");
-- 
2.24.1