From 88a469bbb2012448db266f3783448c673be7208a Mon Sep 17 00:00:00 2001 From: Chris Lapa Date: Fri, 24 Jun 2016 12:26:09 +1000 Subject: 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 Reviewed-by: Krzysztof Kozlowski Signed-off-by: Sebastian Reichel --- drivers/power/max8903_charger.c | 136 ++++++++++++++++++++++++++++++---------- 1 file changed, 102 insertions(+), 34 deletions(-) (limited to 'drivers/power') 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; -- cgit v1.2.3