staging: nvec: add LED support (97cc2657) · Commits · 戴 / test

drivers/staging/nvec/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -25,3 +25,9 @@ config NVEC_POWER
		help
		Say Y to enable support for battery and charger interface for
		nVidia compliant embedded controllers.

		config NVEC_LEDS
		bool "NVEC leds"
		depends on MFD_NVEC && LEDS_CLASS
		help
		Say Y to enable yellow side leds on AC100 or other nVidia tegra nvec leds

drivers/staging/nvec/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -2,3 +2,4 @@ obj-$(CONFIG_SERIO_NVEC_PS2) += nvec_ps2.o
		obj-$(CONFIG_MFD_NVEC) += nvec.o
		obj-$(CONFIG_NVEC_POWER) += nvec_power.o
		obj-$(CONFIG_KEYBOARD_NVEC) += nvec_kbd.o
		obj-$(CONFIG_NVEC_LEDS) += nvec_leds.o

drivers/staging/nvec/nvec.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -63,6 +63,10 @@ static struct mfd_cell nvec_devices[] = {
		.name = "nvec-power",
		.id = 2,
		},
		{
		.name = "nvec-leds",
		.id = 1,
		},
		};

		int nvec_register_notifier(struct nvec_chip nvec, struct notifier_block nb,

drivers/staging/nvec/nvec_kbd.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -99,8 +99,8 @@ static int __devinit nvec_kbd_probe(struct platform_device *pdev)
		keycodes[j++] = extcode_tab_us102[i];

		idev = input_allocate_device();
		idev->name = "Tegra nvec keyboard";
		idev->phys = "i2c3_slave/nvec";
		idev->name = "nvec keyboard";
		idev->phys = "nvec";
		idev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_REP) \| BIT_MASK(EV_LED);
		idev->ledbit[0] = BIT_MASK(LED_CAPSL);
		idev->event = nvec_kbd_event;

drivers/staging/nvec/nvec_leds.c

0 → 100644

+114 −0

Original line number	Diff line number	Diff line
		/*
		* nvec_leds: LED driver for a NVIDIA compliant embedded controller
		*
		* Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
		*
		* Authors: Ilya Petrov <ilya.muromec@gmail.com>
		*
		* This file is subject to the terms and conditions of the GNU General Public
		* License. See the file "COPYING" in the main directory of this archive
		* for more details.
		*
		*/

		#include <linux/module.h>
		#include <linux/err.h>
		#include <linux/slab.h>
		#include <linux/leds.h>
		#include <linux/platform_device.h>
		#include "nvec.h"

		#define to_nvec_led(led_cdev) \
		container_of(led_cdev, struct nvec_led, cdev)

		#define NVEC_LED_REQ {'\x0d', '\x10', '\x45', '\x10', '\x00'}

		#define NVEC_LED_MAX 8

		struct nvec_led {
		struct led_classdev cdev;
		struct nvec_chip *nvec;
		};

		static void nvec_led_brightness_set(struct led_classdev *led_cdev,
		enum led_brightness value)
		{
		struct nvec_led *led = to_nvec_led(led_cdev);
		unsigned char buf[] = NVEC_LED_REQ;
		buf[4] = value;

		nvec_write_async(led->nvec, buf, sizeof(buf));

		led->cdev.brightness = value;

		}

		static int __devinit nvec_led_probe(struct platform_device *pdev)
		{
		struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
		struct nvec_led *led;
		int ret = 0;

		led = kzalloc(sizeof(*led), GFP_KERNEL);
		if (led == NULL)
		return -ENOMEM;

		led->cdev.max_brightness = NVEC_LED_MAX;

		led->cdev.brightness_set = nvec_led_brightness_set;
		led->cdev.name = "nvec-led";
		led->cdev.flags \|= LED_CORE_SUSPENDRESUME;
		led->nvec = nvec;

		platform_set_drvdata(pdev, led);

		ret = led_classdev_register(&pdev->dev, &led->cdev);
		if (ret < 0)
		goto err_led;

		/* to expose the default value to userspace */
		led->cdev.brightness = 0;

		return 0;

		err_led:
		kfree(led);
		return ret;
		}

		static int __devexit nvec_led_remove(struct platform_device *pdev)
		{
		struct nvec_led *led = platform_get_drvdata(pdev);

		led_classdev_unregister(&led->cdev);
		kfree(led);
		return 0;
		}

		static struct platform_driver nvec_led_driver = {
		.probe = nvec_led_probe,
		.remove = __devexit_p(nvec_led_remove),
		.driver = {
		.name = "nvec-leds",
		.owner = THIS_MODULE,
		},
		};

		static int __init nvec_led_init(void)
		{
		return platform_driver_register(&nvec_led_driver);
		}

		module_init(nvec_led_init);

		static void __exit nvec_led_exit(void)
		{
		platform_driver_unregister(&nvec_led_driver);
		}

		module_exit(nvec_led_exit);

		MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
		MODULE_DESCRIPTION("Tegra NVEC LED driver");
		MODULE_LICENSE("GPL");
		MODULE_ALIAS("platform:nvec-leds");

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