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max8925_power: Add support for device-tree initialization

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This patch adds support for initializing platform data from the
device-tree description.

Signed-off-by: Qing Xu <qingx@marvell.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
This commit is contained in:
Qing Xu 2012-11-19 15:39:12 +08:00 committed by Anton Vorontsov
parent a12810ab9f
commit eba3b670a9
1 changed files with 50 additions and 1 deletions
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51
drivers/power/max8925_power.c
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@ -12,6 +12,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/of.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
@ -426,6 +427,54 @@ static __devexit int max8925_deinit_charger(struct max8925_power_info *info)
return 0; return 0;
} }
#ifdef CONFIG_OF
static struct max8925_power_pdata *
max8925_power_dt_init(struct platform_device *pdev)
{
struct device_node *nproot = pdev->dev.parent->of_node;
struct device_node *np;
int batt_detect;
int topoff_threshold;
int fast_charge;
int no_temp_support;
int no_insert_detect;
struct max8925_power_pdata *pdata;
if (!nproot)
return pdev->dev.platform_data;
np = of_find_node_by_name(nproot, "charger");
if (!np) {
dev_err(&pdev->dev, "failed to find charger node\n");
return NULL;
}
pdata = devm_kzalloc(&pdev->dev,
sizeof(struct max8925_power_pdata),
GFP_KERNEL);
of_property_read_u32(np, "topoff-threshold", &topoff_threshold);
of_property_read_u32(np, "batt-detect", &batt_detect);
of_property_read_u32(np, "fast-charge", &fast_charge);
of_property_read_u32(np, "no-insert-detect", &no_insert_detect);
of_property_read_u32(np, "no-temp-support", &no_temp_support);
pdata->batt_detect = batt_detect;
pdata->fast_charge = fast_charge;
pdata->topoff_threshold = topoff_threshold;
pdata->no_insert_detect = no_insert_detect;
pdata->no_temp_support = no_temp_support;
return pdata;
}
#else
static struct max8925_power_pdata *
max8925_power_dt_init(struct platform_device *pdev)
{
return pdev->dev.platform_data;
}
#endif
static __devinit int max8925_power_probe(struct platform_device *pdev) static __devinit int max8925_power_probe(struct platform_device *pdev)
{ {
struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent); struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
@ -433,7 +482,7 @@ static __devinit int max8925_power_probe(struct platform_device *pdev)
struct max8925_power_info *info; struct max8925_power_info *info;
int ret; int ret;
pdata = pdev->dev.platform_data; pdata = max8925_power_dt_init(pdev);
if (!pdata) { if (!pdata) {
dev_err(&pdev->dev, "platform data isn't assigned to " dev_err(&pdev->dev, "platform data isn't assigned to "
"power supply\n"); "power supply\n");