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authorQing Xu <qingx@marvell.com>2012-11-19 15:39:12 +0800
committerAnton Vorontsov <anton.vorontsov@linaro.org>2012-11-18 23:54:07 -0800
commiteba3b670a9166a91be5a11fe33290dca6b9457a2 (patch)
tree87d10931f4212eeb01639c386c9b5a61654c723e /drivers/power
parenta12810ab9fcf0c9fd5e50b5e350a3ffbeaa571be (diff)
max8925_power: Add support for device-tree initialization
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>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/max8925_power.c51
1 files changed, 50 insertions, 1 deletions
diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c
index daa333bd7eb..b5a3ccb16a1 100644
--- a/drivers/power/max8925_power.c
+++ b/drivers/power/max8925_power.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
+#include <linux/of.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
@@ -426,6 +427,54 @@ static __devexit int max8925_deinit_charger(struct max8925_power_info *info)
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)
{
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;
int ret;
- pdata = pdev->dev.platform_data;
+ pdata = max8925_power_dt_init(pdev);
if (!pdata) {
dev_err(&pdev->dev, "platform data isn't assigned to "
"power supply\n");