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authorChris Lapa <chris@lapa.com.au>2016-06-24 12:26:09 +1000
committerSebastian Reichel <sre@kernel.org>2016-06-28 20:05:41 +0200
commit88a469bbb2012448db266f3783448c673be7208a (patch)
tree3818c7b4d0d5cb4c188fb2ea524c06af9b6c47db /drivers/power/max8903_charger.c
parentcbf9077e586b9c0db1a1ce5690552ae268c15848 (diff)
max8903: adds requesting of gpios.
This change ensures all gpios are available for the driver to use and also splits off gpio setup into its own function for readability. Signed-off-by: Chris Lapa <chris@lapa.com.au> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power/max8903_charger.c')
-rw-r--r--drivers/power/max8903_charger.c136
1 files changed, 102 insertions, 34 deletions
diff --git a/drivers/power/max8903_charger.c b/drivers/power/max8903_charger.c
index 6ec705f7a9d9..3f35593443b3 100644
--- a/drivers/power/max8903_charger.c
+++ b/drivers/power/max8903_charger.c
@@ -179,39 +179,27 @@ static irqreturn_t max8903_fault(int irq, void *_data)
return IRQ_HANDLED;
}
-static int max8903_probe(struct platform_device *pdev)
+static int max8903_setup_gpios(struct platform_device *pdev)
{
- struct max8903_data *data;
+ struct max8903_data *data = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
struct max8903_pdata *pdata = pdev->dev.platform_data;
- struct power_supply_config psy_cfg = {};
int ret = 0;
int gpio;
int ta_in = 0;
int usb_in = 0;
- if (pdata == NULL) {
- dev_err(dev, "No platform data.\n");
- return -EINVAL;
- }
-
- data = devm_kzalloc(dev, sizeof(struct max8903_data), GFP_KERNEL);
- if (data == NULL) {
- dev_err(dev, "Cannot allocate memory.\n");
- return -ENOMEM;
- }
-
- data->pdata = pdev->dev.platform_data;
- data->dev = dev;
- platform_set_drvdata(pdev, data);
-
- if (pdata->dc_valid == false && pdata->usb_valid == false) {
- dev_err(dev, "No valid power sources.\n");
- return -EINVAL;
- }
-
if (pdata->dc_valid) {
if (pdata->dok && gpio_is_valid(pdata->dok)) {
+ ret = devm_gpio_request(dev, pdata->dok,
+ data->psy_desc.name);
+ if (ret) {
+ dev_err(dev,
+ "Failed GPIO request for dok: %d err %d\n",
+ pdata->dok, ret);
+ return ret;
+ }
+
gpio = pdata->dok; /* PULL_UPed Interrupt */
ta_in = gpio_get_value(gpio) ? 0 : 1;
} else {
@@ -222,6 +210,15 @@ static int max8903_probe(struct platform_device *pdev)
if (pdata->dcm) {
if (gpio_is_valid(pdata->dcm)) {
+ ret = devm_gpio_request(dev, pdata->dcm,
+ data->psy_desc.name);
+ if (ret) {
+ dev_err(dev,
+ "Failed GPIO request for dcm: %d err %d\n",
+ pdata->dcm, ret);
+ return ret;
+ }
+
gpio = pdata->dcm; /* Output */
gpio_set_value(gpio, ta_in);
} else {
@@ -232,6 +229,15 @@ static int max8903_probe(struct platform_device *pdev)
if (pdata->usb_valid) {
if (pdata->uok && gpio_is_valid(pdata->uok)) {
+ ret = devm_gpio_request(dev, pdata->uok,
+ data->psy_desc.name);
+ if (ret) {
+ dev_err(dev,
+ "Failed GPIO request for uok: %d err %d\n",
+ pdata->uok, ret);
+ return ret;
+ }
+
gpio = pdata->uok;
usb_in = gpio_get_value(gpio) ? 0 : 1;
} else {
@@ -243,6 +249,15 @@ static int max8903_probe(struct platform_device *pdev)
if (pdata->cen) {
if (gpio_is_valid(pdata->cen)) {
+ ret = devm_gpio_request(dev, pdata->cen,
+ data->psy_desc.name);
+ if (ret) {
+ dev_err(dev,
+ "Failed GPIO request for cen: %d err %d\n",
+ pdata->cen, ret);
+ return ret;
+ }
+
gpio_set_value(pdata->cen, (ta_in || usb_in) ? 0 : 1);
} else {
dev_err(dev, "Invalid pin: cen.\n");
@@ -251,23 +266,41 @@ static int max8903_probe(struct platform_device *pdev)
}
if (pdata->chg) {
- if (!gpio_is_valid(pdata->chg)) {
- dev_err(dev, "Invalid pin: chg.\n");
- return -EINVAL;
+ if (gpio_is_valid(pdata->chg)) {
+ ret = devm_gpio_request(dev, pdata->chg,
+ data->psy_desc.name);
+ if (ret) {
+ dev_err(dev,
+ "Failed GPIO request for chg: %d err %d\n",
+ pdata->chg, ret);
+ return ret;
+ }
}
}
if (pdata->flt) {
- if (!gpio_is_valid(pdata->flt)) {
- dev_err(dev, "Invalid pin: flt.\n");
- return -EINVAL;
+ if (gpio_is_valid(pdata->flt)) {
+ ret = devm_gpio_request(dev, pdata->flt,
+ data->psy_desc.name);
+ if (ret) {
+ dev_err(dev,
+ "Failed GPIO request for flt: %d err %d\n",
+ pdata->flt, ret);
+ return ret;
+ }
}
}
if (pdata->usus) {
- if (!gpio_is_valid(pdata->usus)) {
- dev_err(dev, "Invalid pin: usus.\n");
- return -EINVAL;
+ if (gpio_is_valid(pdata->usus)) {
+ ret = devm_gpio_request(dev, pdata->usus,
+ data->psy_desc.name);
+ if (ret) {
+ dev_err(dev,
+ "Failed GPIO request for usus: %d err %d\n",
+ pdata->usus, ret);
+ return ret;
+ }
}
}
@@ -275,9 +308,44 @@ static int max8903_probe(struct platform_device *pdev)
data->ta_in = ta_in;
data->usb_in = usb_in;
+ return 0;
+}
+
+static int max8903_probe(struct platform_device *pdev)
+{
+ struct max8903_data *data;
+ struct device *dev = &pdev->dev;
+ struct max8903_pdata *pdata = pdev->dev.platform_data;
+ struct power_supply_config psy_cfg = {};
+ int ret = 0;
+
+ if (pdata == NULL) {
+ dev_err(dev, "No platform data.\n");
+ return -EINVAL;
+ }
+
+ data = devm_kzalloc(dev, sizeof(struct max8903_data), GFP_KERNEL);
+ if (data == NULL) {
+ dev_err(dev, "Cannot allocate memory.\n");
+ return -ENOMEM;
+ }
+
+ data->pdata = pdev->dev.platform_data;
+ data->dev = dev;
+ platform_set_drvdata(pdev, data);
+
+ if (pdata->dc_valid == false && pdata->usb_valid == false) {
+ dev_err(dev, "No valid power sources.\n");
+ return -EINVAL;
+ }
+
+ ret = max8903_setup_gpios(pdev);
+ if (ret)
+ return ret;
+
data->psy_desc.name = "max8903_charger";
- data->psy_desc.type = (ta_in) ? POWER_SUPPLY_TYPE_MAINS :
- ((usb_in) ? POWER_SUPPLY_TYPE_USB :
+ data->psy_desc.type = (data->ta_in) ? POWER_SUPPLY_TYPE_MAINS :
+ ((data->usb_in) ? POWER_SUPPLY_TYPE_USB :
POWER_SUPPLY_TYPE_BATTERY);
data->psy_desc.get_property = max8903_get_property;
data->psy_desc.properties = max8903_charger_props;