linux-kernel - Re: [PATCH] arm: dts: omap4-sdp: pinmux configuration for keypad

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Message-ID: <50850299.7070405@ti.com>
Date:	Mon, 22 Oct 2012 13:53:53 +0530
From:	Sourav <sourav.poddar@...com>
To:	Benoit Cousson <b-cousson@...com>
CC:	<tony@...mide.com>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-arm-kernel@...ts.infradead.org>, Felipe Balbi <balbi@...com>
Subject: Re: [PATCH] arm: dts: omap4-sdp: pinmux configuration for keypad

Hi Benoit,
On Monday 22 October 2012 01:15 PM, Benoit Cousson wrote:
> Hi Sourav,
>
> On 10/22/2012 09:29 AM, Sourav Poddar wrote:
>> Currently, omap4 keypad mux settings are done in the board file.
>> Populate the mux settings in the dts file for the keypad to
>> work via dt.
> Have you changed the driver to handle properly the dependency with the
> pinctrl and thus return EPROBE_DEFER if this is not ready?
I have send a patch[1] to the mailing list on the driver changes.
http://www.spinics.net/lists/linux-omap/msg79985.html.

Though, I see I have missed the following EPROBE_DEFER check..
+               if (PTR_ERR(dev->pins) == -EPROBE_DEFER)
+                       return -EPROBE_DEFER;
Will add for the above patch.
> Seb Guiriec has just sent a patch to do that for the omap-i2c driver
> ([PATCH] i2c: omap: adopt pinctrl support).
>
>> Cc: Felipe Balbi <balbi@...com>
>> Tested on omap4430 sdp with 3.7-rc1.
>>
>> Signed-off-by: Sourav Poddar <sourav.poddar@...com>
>> ---
>>   arch/arm/boot/dts/omap4-sdp.dts |   26 ++++++++++++++++++++++++++
>>   1 files changed, 26 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/omap4-sdp.dts b/arch/arm/boot/dts/omap4-sdp.dts
>> index 5b7e04f..5efb059 100644
>> --- a/arch/arm/boot/dts/omap4-sdp.dts
>> +++ b/arch/arm/boot/dts/omap4-sdp.dts
>> @@ -194,6 +194,27 @@
>>   			0xbc 0x100	/* abe_mcbsp2_fsx.abe_mcbsp2_fsx INPUT | MODE0 */
>>   		>;
>>   	};
>> +
>> +	keypad_pins: pinmux_keypad_pins {
>> +		pinctrl-single,pins = <
>> +			0x24 0x4119   /* gpmc_a18.kpd_row6 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +			0x26 0x4119   /* gpmc_a19.kpd_row6 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +			0x2c 0x4001   /* gpmc_a22.kpd_col6 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
>> +			0x2e 0x4001   /* gpmc_a23.kpd_col7 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
>> +			0x13c 0x4001  /* kpd_col0.kpd_col0 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
>> +			0x13e 0x4001  /* kpd_col1.kpd_col1 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
>> +			0x140 0x4001  /* kpd_col2.kpd_col2 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
>> +			0x142 0x10F   /* kpd_col3.kpd_col3 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
> Alway use lower case for hexa value.
Ok. Will fix and send a new version.
>> +			0x144 0x4001  /* kpd_col4.kpd_col4 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
>> +			0x146 0x4001  /* kpd_col5.kpd_col5 OMAP_WAKEUP_EN | OMAP_MUX_MODE1 */
>> +			0x148 0xc119  /* kpd_row0.kpd_row0 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +			0x14a 0x4119  /* kpd_row1.kpd_row1 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +			0x14c 0x4119  /* kpd_row2.kpd_row2 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +			0x14e 0x4119  /* kpd_row3.kpd_row3 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +			0x150 0x4119  /* kpd_row4.kpd_row4 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +			0x152 0x4119  /* kpd_row5.kpd_row5 OMAP_PULL_ENA | OMAP_PULL_UP | OMAP_WAKEUP_EN | OMAP_MUX_MODE1 | OMAP_INPUT_EN */
>> +		>;
>> +	};
>>   };
>>   
>>   &i2c1 {
>> @@ -406,3 +427,8 @@
>>   &mcbsp3 {
>>   	status = "disabled";
>>   };
>> +
>> +&keypad {
>> +        pinctrl-names = "default";
>> +        pinctrl-0 = <&keypad_pins>;
>> +};
> Otherwise that looks good.
>
> Thanks,
> Benoit
Thanks,
Sourav
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