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| author |   Linus Walleij <linus.walleij@linaro.org> | 2013-04-23 04:52:59 -0700 |
|---|---|---|
| committer |   Bryan Wu <cooloney@gmail.com> | 2013-06-20 16:21:31 -0700 |
| commit | 7542a04b1515f0f878b267beb233c4ef067243fb (patch) | |
| tree | f5516bc2113773391893cbbd2b309feb45829f18 /drivers/leds/leds-lp55xx-common.c | |
| parent | Linux 3.10-rc6 (diff) | |
| download | linux-dev-7542a04b1515f0f878b267beb233c4ef067243fb.tar.xz linux-dev-7542a04b1515f0f878b267beb233c4ef067243fb.zip | |
leds: lp55xx: add support for Device Tree bindings
This patch allows the lp5521 driver to be successfully probed and
initialised when Device Tree support is enabled.
Based on a patch by Gabriel Fernandez, rewritten in accordance
with review feedback.
Cc: Gabriel Fernandez <gabriel.fernandez@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds/leds-lp55xx-common.c')
| -rw-r--r-- | drivers/leds/leds-lp55xx-common.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index ba34199dc3d9..a0d2bd2fa23c 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -19,6 +19,7 @@ #include <linux/leds.h> #include <linux/module.h> #include <linux/platform_data/leds-lp55xx.h> +#include <linux/slab.h> #include "leds-lp55xx-common.h" @@ -554,6 +555,59 @@ void lp55xx_unregister_sysfs(struct lp55xx_chip *chip) } EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs); +int lp55xx_of_populate_pdata(struct device *dev, struct device_node *np) +{ + struct lp55xx_platform_data *pdata; + u8 led_cur[3]; + u8 max_cur[3]; + u8 clock_mode; + u8 num_channel; + const char *label; + struct lp55xx_led_config *led_config; + int ret; + int i; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + ret = of_property_read_u8(np, "num-channel", &num_channel); + if (ret < 0) + return ret; + ret = of_property_read_u8_array(np, "led-cur", led_cur, num_channel); + if (ret < 0) + return ret; + ret = of_property_read_u8_array(np, "max-cur", max_cur, num_channel); + if (ret < 0) + return ret; + ret = of_property_read_string(np, "label", &label); + if (ret < 0) + return ret; + ret = of_property_read_u8_array(np, "clock-mode", &clock_mode, 1); + if (ret < 0) + return ret; + + led_config = devm_kzalloc(dev, sizeof(*led_config) * num_channel, + GFP_KERNEL); + if (!led_config) + return -ENOMEM; + + for (i = 0; i < num_channel; i++) { + led_config[i].chan_nr = i; + led_config[i].led_current = led_cur[i]; + led_config[i].max_current = max_cur[i]; + } + pdata->label = kzalloc(sizeof(char) * 32, GFP_KERNEL); + strcpy((char *)pdata->label, (char *) label); + pdata->led_config = &led_config[0]; + pdata->num_channels = num_channel; + pdata->clock_mode = clock_mode; + dev->platform_data = pdata; + + return 0; +} +EXPORT_SYMBOL_GPL(lp55xx_of_populate_pdata); + MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); MODULE_DESCRIPTION("LP55xx Common Driver"); MODULE_LICENSE("GPL"); |