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Date: Mon, 19 Nov 2012 15:28:14 +0800
From: Qing Xu <qingx@...vell.com>
To: Anton Vorontsov <cbouatmailru@...il.com>
Cc: "dwmw2@...radead.org" <dwmw2@...radead.org>,
"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
"haojian.zhuang@...il.com" <haojian.zhuang@...il.com>,
Chao Xie <cxie4@...vell.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"devicetree-discuss@...ts.ozlabs.org"
<devicetree-discuss@...ts.ozlabs.org>
Subject: Re: [PATCH v2 4/7] mfd: max8925: support dt for power supply
On 11/19/2012 03:06 PM, Anton Vorontsov wrote:
> On Mon, Nov 19, 2012 at 02:52:24PM +0800, Qing Xu wrote:
>> From: Qing Xu <qingx@...vell.com>
>>
>> Signed-off-by: Qing Xu <qingx@...vell.com>
>> ---
>> drivers/power/max8925_power.c | 61 +++++++++++++++++++++++++++++++++++++---
>> 1 files changed, 56 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c
>> index daa333b..aca3f68 100644
>> --- a/drivers/power/max8925_power.c
>> +++ b/drivers/power/max8925_power.c
>> @@ -426,6 +426,57 @@ static __devexit int max8925_deinit_charger(struct max8925_power_info *info)
>> return 0;
>> }
>>
>> +#ifdef CONFIG_OF
>> +static struct max8925_power_pdata*
> Need a whitespace before *.
>
>> +max8925_power_dt_init( struct platform_device *pdev)
> Unneeded tab.
>
>> +{
>> + struct device_node *nproot = pdev->dev.parent->of_node, *np;
> Hmmm. No, this is cryptic. One variable declaration per line please.
>
>> + 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)
> Unneeded tab.
>
>> +{
>> + return pdev->dev.platform_data;
>> +}
>> +#endif
>> +
>> +static char *power_supplicants[] = {
> The rest of the driver uses max8925_ prefix. Also, should it be const char
> *?
>
>> + "max8925-battery",
>> +};
>> +
>> static __devinit int max8925_power_probe(struct platform_device *pdev)
>> {
>> struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
>> @@ -433,7 +484,7 @@ 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");
>> @@ -453,8 +504,8 @@ 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;
> So you no longer able to change supplied_to via platform data. This is a
> backwards-incompatible change.
>
> Commit message should at least explain why this is safe to do (no users in
> the kernel?).
oh, I take test_power.c as example. I will remove this modification.
>> + info->ac.num_supplicants = ARRAY_SIZE(power_supplicants);
>> ret = power_supply_register(&pdev->dev, &info->ac);
>> if (ret)
>> goto out;
>> @@ -465,8 +516,8 @@ 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;
> Ditto.
>
>> + info->usb.num_supplicants = ARRAY_SIZE(power_supplicants);
>>
>> ret = power_supply_register(&pdev->dev, &info->usb);
>> if (ret)
>> --
>> 1.7.0.4
> Thanks,
> Anton.
--
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