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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/leds/leds-88pm860x.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/leds/leds-88pm860x.c')
-rw-r--r-- | kernel/drivers/leds/leds-88pm860x.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/kernel/drivers/leds/leds-88pm860x.c b/kernel/drivers/leds/leds-88pm860x.c new file mode 100644 index 000000000..1497a0916 --- /dev/null +++ b/kernel/drivers/leds/leds-88pm860x.c @@ -0,0 +1,250 @@ +/* + * LED driver for Marvell 88PM860x + * + * Copyright (C) 2009 Marvell International Ltd. + * Haojian Zhuang <haojian.zhuang@marvell.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/i2c.h> +#include <linux/leds.h> +#include <linux/slab.h> +#include <linux/workqueue.h> +#include <linux/mfd/88pm860x.h> +#include <linux/module.h> + +#define LED_PWM_MASK (0x1F) +#define LED_CURRENT_MASK (0x07 << 5) + +#define LED_BLINK_MASK (0x7F) + +#define LED_ON_CONTINUOUS (0x0F << 3) + +#define LED1_BLINK_EN (1 << 1) +#define LED2_BLINK_EN (1 << 2) + +struct pm860x_led { + struct led_classdev cdev; + struct i2c_client *i2c; + struct work_struct work; + struct pm860x_chip *chip; + struct mutex lock; + char name[MFD_NAME_SIZE]; + + int port; + int iset; + unsigned char brightness; + unsigned char current_brightness; + + int reg_control; + int reg_blink; + int blink_mask; +}; + +static int led_power_set(struct pm860x_chip *chip, int port, int on) +{ + int ret = -EINVAL; + + switch (port) { + case 0: + case 1: + case 2: + ret = on ? pm8606_osc_enable(chip, RGB1_ENABLE) : + pm8606_osc_disable(chip, RGB1_ENABLE); + break; + case 3: + case 4: + case 5: + ret = on ? pm8606_osc_enable(chip, RGB2_ENABLE) : + pm8606_osc_disable(chip, RGB2_ENABLE); + break; + } + return ret; +} + +static void pm860x_led_work(struct work_struct *work) +{ + + struct pm860x_led *led; + struct pm860x_chip *chip; + unsigned char buf[3]; + int ret; + + led = container_of(work, struct pm860x_led, work); + chip = led->chip; + mutex_lock(&led->lock); + if ((led->current_brightness == 0) && led->brightness) { + led_power_set(chip, led->port, 1); + if (led->iset) { + pm860x_set_bits(led->i2c, led->reg_control, + LED_CURRENT_MASK, led->iset); + } + pm860x_set_bits(led->i2c, led->reg_blink, + LED_BLINK_MASK, LED_ON_CONTINUOUS); + pm860x_set_bits(led->i2c, PM8606_WLED3B, led->blink_mask, + led->blink_mask); + } + pm860x_set_bits(led->i2c, led->reg_control, LED_PWM_MASK, + led->brightness); + + if (led->brightness == 0) { + pm860x_bulk_read(led->i2c, led->reg_control, 3, buf); + ret = buf[0] & LED_PWM_MASK; + ret |= buf[1] & LED_PWM_MASK; + ret |= buf[2] & LED_PWM_MASK; + if (ret == 0) { + /* unset current since no led is lighting */ + pm860x_set_bits(led->i2c, led->reg_control, + LED_CURRENT_MASK, 0); + pm860x_set_bits(led->i2c, PM8606_WLED3B, + led->blink_mask, 0); + led_power_set(chip, led->port, 0); + } + } + led->current_brightness = led->brightness; + dev_dbg(chip->dev, "Update LED. (reg:%d, brightness:%d)\n", + led->reg_control, led->brightness); + mutex_unlock(&led->lock); +} + +static void pm860x_led_set(struct led_classdev *cdev, + enum led_brightness value) +{ + struct pm860x_led *data = container_of(cdev, struct pm860x_led, cdev); + + data->brightness = value >> 3; + schedule_work(&data->work); +} + +#ifdef CONFIG_OF +static int pm860x_led_dt_init(struct platform_device *pdev, + struct pm860x_led *data) +{ + struct device_node *nproot, *np; + int iset = 0; + + if (!pdev->dev.parent->of_node) + return -ENODEV; + nproot = of_get_child_by_name(pdev->dev.parent->of_node, "leds"); + if (!nproot) { + dev_err(&pdev->dev, "failed to find leds node\n"); + return -ENODEV; + } + for_each_child_of_node(nproot, np) { + if (!of_node_cmp(np->name, data->name)) { + of_property_read_u32(np, "marvell,88pm860x-iset", + &iset); + data->iset = PM8606_LED_CURRENT(iset); + break; + } + } + of_node_put(nproot); + return 0; +} +#else +#define pm860x_led_dt_init(x, y) (-1) +#endif + +static int pm860x_led_probe(struct platform_device *pdev) +{ + struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); + struct pm860x_led_pdata *pdata = dev_get_platdata(&pdev->dev); + struct pm860x_led *data; + struct resource *res; + int ret = 0; + + data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_led), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + res = platform_get_resource_byname(pdev, IORESOURCE_REG, "control"); + if (!res) { + dev_err(&pdev->dev, "No REG resource for control\n"); + return -ENXIO; + } + data->reg_control = res->start; + res = platform_get_resource_byname(pdev, IORESOURCE_REG, "blink"); + if (!res) { + dev_err(&pdev->dev, "No REG resource for blink\n"); + return -ENXIO; + } + data->reg_blink = res->start; + memset(data->name, 0, MFD_NAME_SIZE); + switch (pdev->id) { + case 0: + data->blink_mask = LED1_BLINK_EN; + sprintf(data->name, "led0-red"); + break; + case 1: + data->blink_mask = LED1_BLINK_EN; + sprintf(data->name, "led0-green"); + break; + case 2: + data->blink_mask = LED1_BLINK_EN; + sprintf(data->name, "led0-blue"); + break; + case 3: + data->blink_mask = LED2_BLINK_EN; + sprintf(data->name, "led1-red"); + break; + case 4: + data->blink_mask = LED2_BLINK_EN; + sprintf(data->name, "led1-green"); + break; + case 5: + data->blink_mask = LED2_BLINK_EN; + sprintf(data->name, "led1-blue"); + break; + } + platform_set_drvdata(pdev, data); + data->chip = chip; + data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion; + data->port = pdev->id; + if (pm860x_led_dt_init(pdev, data)) + if (pdata) + data->iset = pdata->iset; + + data->current_brightness = 0; + data->cdev.name = data->name; + data->cdev.brightness_set = pm860x_led_set; + mutex_init(&data->lock); + INIT_WORK(&data->work, pm860x_led_work); + + ret = led_classdev_register(chip->dev, &data->cdev); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register LED: %d\n", ret); + return ret; + } + pm860x_led_set(&data->cdev, 0); + return 0; +} + +static int pm860x_led_remove(struct platform_device *pdev) +{ + struct pm860x_led *data = platform_get_drvdata(pdev); + + led_classdev_unregister(&data->cdev); + + return 0; +} + +static struct platform_driver pm860x_led_driver = { + .driver = { + .name = "88pm860x-led", + }, + .probe = pm860x_led_probe, + .remove = pm860x_led_remove, +}; + +module_platform_driver(pm860x_led_driver); + +MODULE_DESCRIPTION("LED driver for Marvell PM860x"); +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:88pm860x-led"); |