linux-kernel - Re: twl4030_charger: need changes to get probed?

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Message-ID: <20150307210102.GL5233@earth>
Date:	Sat, 7 Mar 2015 22:01:02 +0100
From:	Sebastian Reichel <sre@...ian.org>
To:	Pavel Machek <pavel@....cz>
Cc:	NeilBrown <neilb@...e.de>, pali.rohar@...il.com,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
	aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
	patrikbachan@...il.com, Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	GTA04 owners <gta04-owner@...delico.com>,
	linux-pm@...r.kernel.org
Subject: Re: twl4030_charger: need changes to get probed?

Hi,

On Fri, Mar 06, 2015 at 10:24:17PM +0100, Pavel Machek wrote:
> According to n900 dts, twl4030-bci (aka charger) should be
> included.

its part of twl, but not used on N900 afaik.

> (But it does not seem to do anything useful on n900. I was hoping for
> measurement of input voltage, but .. no.)

check for rx51-battery.

> Any ideas why the patch below is needed?

platform_driver_probe() does not support deferred probing.

Neil, can you take this patch into your series for the next round?

-- Sebastian

> Signed-off-by: Pavel Machek <pavel@....cz>
> 
> diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
> index d35b83e..96bbbe9 100644
> --- a/drivers/power/twl4030_charger.c
> +++ b/drivers/power/twl4030_charger.c
> @@ -714,6 +722,7 @@ static const struct of_device_id twl_bci_of_match[] = {
>  MODULE_DEVICE_TABLE(of, twl_bci_of_match);
>  
>  static struct platform_driver twl4030_bci_driver = {
> +	.probe = twl4030_bci_probe,
>  	.driver	= {
>  		.name	= "twl4030_bci",
>  		.of_match_table = of_match_ptr(twl_bci_of_match),
> @@ -721,7 +730,7 @@ static struct platform_driver twl4030_bci_driver = {
>  	.remove	= __exit_p(twl4030_bci_remove),
>  };
>  
> -module_platform_driver_probe(twl4030_bci_driver, twl4030_bci_probe);
> +module_platform_driver(twl4030_bci_driver);
>  
>  MODULE_AUTHOR("Gražvydas Ignotas");
>  MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver");

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