From: Xiaotong Lu Date: Fri, 1 Jun 2018 18:36:22 +0000 (-0700) Subject: Input: add Spreadtrum vibrator driver X-Git-Tag: v4.19~15^2~25^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=45615a9baf4661f953887988eeb4de69fd6cd96e;p=platform%2Fkernel%2Flinux-rpi.git Input: add Spreadtrum vibrator driver This patch adds the Spreadtrum vibrator driver, which embedded in the Spreadtrum SC27xx series PMICs. Signed-off-by: Xiaotong Lu Signed-off-by: Baolin Wang Signed-off-by: Dmitry Torokhov --- diff --git a/Documentation/devicetree/bindings/input/sprd,sc27xx-vibra.txt b/Documentation/devicetree/bindings/input/sprd,sc27xx-vibra.txt new file mode 100644 index 0000000..f2ec0d4 --- /dev/null +++ b/Documentation/devicetree/bindings/input/sprd,sc27xx-vibra.txt @@ -0,0 +1,23 @@ +Spreadtrum SC27xx PMIC Vibrator + +Required properties: +- compatible: should be "sprd,sc2731-vibrator". +- reg: address of vibrator control register. + +Example : + + sc2731_pmic: pmic@0 { + compatible = "sprd,sc2731"; + reg = <0>; + spi-max-frequency = <26000000>; + interrupts = ; + interrupt-controller; + #interrupt-cells = <2>; + #address-cells = <1>; + #size-cells = <0>; + + vibrator@eb4 { + compatible = "sprd,sc2731-vibrator"; + reg = <0xeb4>; + }; + }; diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 572b15f..c761c0c 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -841,4 +841,14 @@ config INPUT_RAVE_SP_PWRBUTTON To compile this driver as a module, choose M here: the module will be called rave-sp-pwrbutton. +config INPUT_SC27XX_VIBRA + tristate "Spreadtrum sc27xx vibrator support" + depends on MFD_SC27XX_PMIC || COMPILE_TEST + select INPUT_FF_MEMLESS + help + This option enables support for Spreadtrum sc27xx vibrator driver. + + To compile this driver as a module, choose M here. The module will + be called sc27xx_vibra. + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 72cde28..9d0f9d1 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o obj-$(CONFIG_INPUT_AXP20X_PEK) += axp20x-pek.o obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o obj-$(CONFIG_INPUT_RK805_PWRKEY) += rk805-pwrkey.o +obj-$(CONFIG_INPUT_SC27XX_VIBRA) += sc27xx-vibra.o obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY) += soc_button_array.o diff --git a/drivers/input/misc/sc27xx-vibra.c b/drivers/input/misc/sc27xx-vibra.c new file mode 100644 index 0000000..295251a --- /dev/null +++ b/drivers/input/misc/sc27xx-vibra.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Spreadtrum Communications Inc. + */ + +#include +#include +#include +#include +#include +#include + +#define CUR_DRV_CAL_SEL GENMASK(13, 12) +#define SLP_LDOVIBR_PD_EN BIT(9) +#define LDO_VIBR_PD BIT(8) + +struct vibra_info { + struct input_dev *input_dev; + struct work_struct play_work; + struct regmap *regmap; + u32 base; + u32 strength; + bool enabled; +}; + +static void sc27xx_vibra_set(struct vibra_info *info, bool on) +{ + if (on) { + regmap_update_bits(info->regmap, info->base, LDO_VIBR_PD, 0); + regmap_update_bits(info->regmap, info->base, + SLP_LDOVIBR_PD_EN, 0); + info->enabled = true; + } else { + regmap_update_bits(info->regmap, info->base, LDO_VIBR_PD, + LDO_VIBR_PD); + regmap_update_bits(info->regmap, info->base, + SLP_LDOVIBR_PD_EN, SLP_LDOVIBR_PD_EN); + info->enabled = false; + } +} + +static int sc27xx_vibra_hw_init(struct vibra_info *info) +{ + return regmap_update_bits(info->regmap, info->base, CUR_DRV_CAL_SEL, 0); +} + +static void sc27xx_vibra_play_work(struct work_struct *work) +{ + struct vibra_info *info = container_of(work, struct vibra_info, + play_work); + + if (info->strength && !info->enabled) + sc27xx_vibra_set(info, true); + else if (info->strength == 0 && info->enabled) + sc27xx_vibra_set(info, false); +} + +static int sc27xx_vibra_play(struct input_dev *input, void *data, + struct ff_effect *effect) +{ + struct vibra_info *info = input_get_drvdata(input); + + info->strength = effect->u.rumble.weak_magnitude; + schedule_work(&info->play_work); + + return 0; +} + +static void sc27xx_vibra_close(struct input_dev *input) +{ + struct vibra_info *info = input_get_drvdata(input); + + cancel_work_sync(&info->play_work); + if (info->enabled) + sc27xx_vibra_set(info, false); +} + +static int sc27xx_vibra_probe(struct platform_device *pdev) +{ + struct vibra_info *info; + int error; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!info->regmap) { + dev_err(&pdev->dev, "failed to get vibrator regmap.\n"); + return -ENODEV; + } + + error = device_property_read_u32(&pdev->dev, "reg", &info->base); + if (error) { + dev_err(&pdev->dev, "failed to get vibrator base address.\n"); + return error; + } + + info->input_dev = devm_input_allocate_device(&pdev->dev); + if (!info->input_dev) { + dev_err(&pdev->dev, "failed to allocate input device.\n"); + return -ENOMEM; + } + + info->input_dev->name = "sc27xx:vibrator"; + info->input_dev->id.version = 0; + info->input_dev->close = sc27xx_vibra_close; + + input_set_drvdata(info->input_dev, info); + input_set_capability(info->input_dev, EV_FF, FF_RUMBLE); + INIT_WORK(&info->play_work, sc27xx_vibra_play_work); + info->enabled = false; + + error = sc27xx_vibra_hw_init(info); + if (error) { + dev_err(&pdev->dev, "failed to initialize the vibrator.\n"); + return error; + } + + error = input_ff_create_memless(info->input_dev, NULL, + sc27xx_vibra_play); + if (error) { + dev_err(&pdev->dev, "failed to register vibrator to FF.\n"); + return error; + } + + error = input_register_device(info->input_dev); + if (error) { + dev_err(&pdev->dev, "failed to register input device.\n"); + return error; + } + + return 0; +} + +static const struct of_device_id sc27xx_vibra_of_match[] = { + { .compatible = "sprd,sc2731-vibrator", }, + {} +}; +MODULE_DEVICE_TABLE(of, sc27xx_vibra_of_match); + +static struct platform_driver sc27xx_vibra_driver = { + .driver = { + .name = "sc27xx-vibrator", + .of_match_table = sc27xx_vibra_of_match, + }, + .probe = sc27xx_vibra_probe, +}; + +module_platform_driver(sc27xx_vibra_driver); + +MODULE_DESCRIPTION("Spreadtrum SC27xx Vibrator Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Xiaotong Lu ");