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Date: Sun, 18 Nov 2012 16:24:47 -0800
From: Anton Vorontsov <anton.vorontsov@...aro.org>
To: Qing Xu <qingx@...vell.com>
Cc: dwmw2@...radead.org, sameo@...ux.intel.com,
grant.likely@...retlab.ca, rob.herring@...xeda.com,
haojian.zhuang@...il.com, cxie4@...vell.com,
linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 4/7] mfd: max8925: support dt for power supply
On Tue, Nov 06, 2012 at 03:42:44PM +0800, Qing Xu wrote:
> From: Qing Xu <qingx@...vell.com>
>
> Signed-off-by: Qing Xu <qingx@...vell.com>
> ---
W/ this patch I'm getting this warning:
CC drivers/power/max8925_power.o
drivers/power/max8925_power.c: In function ‘max8925_power_probe’:
drivers/power/max8925_power.c:479:3: warning: statement with no effect
[-Wunused-value]
> drivers/power/max8925_power.c | 57 ++++++++++++++++++++++++++++++++++++----
> 1 files changed, 51 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c
> index daa333b..dd2ac2d 100644
> --- a/drivers/power/max8925_power.c
> +++ b/drivers/power/max8925_power.c
> @@ -426,14 +426,58 @@ static __devexit int max8925_deinit_charger(struct max8925_power_info *info)
> return 0;
> }
>
> +#ifdef CONFIG_OF
> +static int max8925_power_dt_init(struct platform_device *pdev,
> + struct max8925_power_pdata *pdata)
> +{
> + struct device_node *nproot = pdev->dev.parent->of_node, *np;
> + int batt_detect, topoff_threshold, fast_charge,
> + no_temp_support, no_insert_detect;
One variable declaration per line please.
> +
> + if (!nproot)
> + return -ENODEV;
Please add an empty line here.
> + np = of_find_node_by_name(nproot, "charger");
> + if (!np) {
> + dev_err(&pdev->dev, "failed to find charger node\n");
> + return -ENODEV;
> + }
ditto.
> + 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;
ditto
> + pr_err("batt_detect%d, topoff_threshold%d, fast_charge%d,no_temp_support%d, no_insert_detect%d\n",
> + batt_detect, topoff_threshold, fast_charge,
> + no_temp_support, no_insert_detect);
pr_err, are you sure? :)
> + return 0;
> +}
> +#else
> +#define max8925_power_dt_init(x, y) (-1)
You should make it static inline function to get rid of the warning above.
> +#endif
> +
> +static char *power_supplicants[] = {
> + "max8925-battery",
> +};
> +
> static __devinit int max8925_power_probe(struct platform_device *pdev)
> {
> struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
> - struct max8925_power_pdata *pdata = NULL;
> + struct max8925_power_pdata *pdata = pdev->dev.platform_data;
> struct max8925_power_info *info;
> int ret;
>
> - pdata = pdev->dev.platform_data;
> + if (pdev->dev.parent->of_node && !pdata) {
> + pdata = devm_kzalloc(&pdev->dev,
> + sizeof(struct max8925_power_pdata),
> + GFP_KERNEL);
>
Please move this logic into max8925_power_dt_init().
So it will look like
if (!pdata)
pdata = max8925_power_dt_init(pdev);
if (!pdata) {
dev_err(...);
return ...;
}
> + max8925_power_dt_init(pdev, pdata);
> + }
> if (!pdata) {
> dev_err(&pdev->dev, "platform data isn't assigned to "
> "power supply\n");
> @@ -453,8 +497,8 @@ static __devinit int max8925_power_probe(struct platform_device *pdev)
> info->ac.properties = max8925_ac_props;
> info->ac.num_properties = ARRAY_SIZE(max8925_ac_props);
> info->ac.get_property = max8925_ac_get_prop;
> - info->ac.supplied_to = pdata->supplied_to;
> - info->ac.num_supplicants = pdata->num_supplicants;
> + info->ac.supplied_to = power_supplicants;
> + info->ac.num_supplicants = ARRAY_SIZE(power_supplicants);
> ret = power_supply_register(&pdev->dev, &info->ac);
> if (ret)
> goto out;
> @@ -465,8 +509,8 @@ static __devinit int max8925_power_probe(struct platform_device *pdev)
> info->usb.properties = max8925_usb_props;
> info->usb.num_properties = ARRAY_SIZE(max8925_usb_props);
> info->usb.get_property = max8925_usb_get_prop;
> - info->usb.supplied_to = pdata->supplied_to;
> - info->usb.num_supplicants = pdata->num_supplicants;
> + info->usb.supplied_to = power_supplicants;
> + info->usb.num_supplicants = ARRAY_SIZE(power_supplicants);
>
> ret = power_supply_register(&pdev->dev, &info->usb);
> if (ret)
> @@ -491,6 +535,7 @@ static __devinit int max8925_power_probe(struct platform_device *pdev)
> info->no_insert_detect = pdata->no_insert_detect;
>
> max8925_init_charger(chip, info);
> +
This change is unrelated.
> return 0;
> out_battery:
> power_supply_unregister(&info->battery);
> --
> 1.7.0.4
Thanks,
Anton.
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