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Message-Id: <1466375242-38354-5-git-send-email-chris@cpdesign.com.au>
Date: Mon, 20 Jun 2016 08:27:19 +1000
From: Chris Lapa <chris@...a.com.au>
To: k.kozlowski@...sung.com, dwmw2@...radead.org, dbaryshkov@...il.com,
sre@...nel.org, mark.rutland@....com, robh+dt@...nel.org
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-pm@...r.kernel.org, Chris Lapa <chris@...a.com.au>
Subject: [PATCH v4 4/7] max8903: adds requesting of gpios.
From: Chris Lapa <chris@...a.com.au>
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@...a.com.au>
---
drivers/power/max8903_charger.c | 136 ++++++++++++++++++++++++++++++----------
1 file changed, 102 insertions(+), 34 deletions(-)
diff --git a/drivers/power/max8903_charger.c b/drivers/power/max8903_charger.c
index 6ec705f..3f35593 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;
--
1.9.1
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