diff options
| author | Haojian Zhuang <haojian.zhuang@gmail.com> | 2012-09-21 18:06:52 +0800 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-10-02 11:43:13 +0200 |
| commit | 2e57d56747e601b3e0ff6697e524025d0504d161 (patch) | |
| tree | 29a7c677878d39f64e90dfbdf7063a11c08d4c15 /drivers/rtc/rtc-88pm860x.c | |
| parent | 837c8293ba24d08cd7438d82ad9bb8d2fb0f8a5b (diff) | |
mfd: 88pm860x: Device tree support
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/rtc/rtc-88pm860x.c')
| -rw-r--r-- | drivers/rtc/rtc-88pm860x.c | 43 |
1 files changed, 34 insertions, 9 deletions
diff --git a/drivers/rtc/rtc-88pm860x.c b/drivers/rtc/rtc-88pm860x.c index feddefc4210..de9e854b326 100644 --- a/drivers/rtc/rtc-88pm860x.c +++ b/drivers/rtc/rtc-88pm860x.c @@ -11,6 +11,7 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/mutex.h> @@ -284,6 +285,28 @@ out: } #endif +#ifdef CONFIG_OF +static int __devinit pm860x_rtc_dt_init(struct platform_device *pdev, + struct pm860x_rtc_info *info) +{ + struct device_node *np = pdev->dev.parent->of_node; + int ret; + if (!np) + return -ENODEV; + np = of_find_node_by_name(np, "rtc"); + if (!np) { + dev_err(&pdev->dev, "failed to find rtc node\n"); + return -ENODEV; + } + ret = of_property_read_u32(np, "marvell,88pm860x-vrtc", &info->vrtc); + if (ret) + info->vrtc = 0; + return 0; +} +#else +#define pm860x_rtc_dt_init(x, y) (-1) +#endif + static int __devinit pm860x_rtc_probe(struct platform_device *pdev) { struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); @@ -294,8 +317,6 @@ static int __devinit pm860x_rtc_probe(struct platform_device *pdev) int ret; pdata = pdev->dev.platform_data; - if (pdata == NULL) - dev_warn(&pdev->dev, "No platform data!\n"); info = kzalloc(sizeof(struct pm860x_rtc_info), GFP_KERNEL); if (!info) @@ -345,9 +366,11 @@ static int __devinit pm860x_rtc_probe(struct platform_device *pdev) } } rtc_tm_to_time(&tm, &ticks); - if (pdata && pdata->sync) { - pdata->sync(ticks); - info->sync = pdata->sync; + if (pm860x_rtc_dt_init(pdev, info)) { + if (pdata && pdata->sync) { + pdata->sync(ticks); + info->sync = pdata->sync; + } } info->rtc_dev = rtc_device_register("88pm860x-rtc", &pdev->dev, @@ -366,10 +389,12 @@ static int __devinit pm860x_rtc_probe(struct platform_device *pdev) #ifdef VRTC_CALIBRATION /* <00> -- 2.7V, <01> -- 2.9V, <10> -- 3.1V, <11> -- 3.3V */ - if (pdata && pdata->vrtc) - info->vrtc = pdata->vrtc & 0x3; - else - info->vrtc = 1; + if (pm860x_rtc_dt_init(pdev, info)) { + if (pdata && pdata->vrtc) + info->vrtc = pdata->vrtc & 0x3; + else + info->vrtc = 1; + } pm860x_set_bits(info->i2c, PM8607_MEAS_EN2, MEAS2_VRTC, MEAS2_VRTC); /* calibrate VRTC */ |