linux-kernel - Re: [PATCH 2/3] OMAP i2c: pinctrl-ify i2c-omap.c

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Date:	Tue, 18 Sep 2012 22:37:22 +0300
From:	Pantelis Antoniou <panto@...oniou-consulting.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Benoit Cousson <b-cousson@...com>, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org, Matt Porter <mporter@...com>,
	Koen Kooi <koen@...inion.thruhere.net>,
	Shubhrajyoti D <shubhrajyoti@...com>
Subject: Re: [PATCH 2/3] OMAP i2c: pinctrl-ify i2c-omap.c

Hi Tony,

On Sep 18, 2012, at 9:23 PM, Tony Lindgren wrote:

> * Pantelis Antoniou <panto@...oniou-consulting.com> [120918 11:13]:
>> Add support for pinctrl mux settings in the OMAP I2C driver.
>> If no such pinctl bindings are found a warning message is printed.
>> 
>> Signed-off-by: Pantelis Antoniou <panto@...oniou-consulting.com>
>> 
>> ---
>> drivers/i2c/busses/i2c-omap.c | 7 +++++++
>> 1 file changed, 7 insertions(+)
>> 
>> diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
>> index b149e32..f722478 100644
>> --- a/drivers/i2c/busses/i2c-omap.c
>> +++ b/drivers/i2c/busses/i2c-omap.c
>> @@ -43,6 +43,8 @@
>> #include <linux/slab.h>
>> #include <linux/i2c-omap.h>
>> #include <linux/pm_runtime.h>
>> +#include <linux/pinctrl/consumer.h>
>> +#include <linux/err.h>
>> 
>> /* I2C controller revisions */
>> #define OMAP_I2C_OMAP1_REV_2		0x20
>> @@ -1057,6 +1059,7 @@ omap_i2c_probe(struct platform_device *pdev)
>> 	const struct of_device_id *match;
>> 	int irq;
>> 	int r;
>> +	struct pinctrl *pinctrl;
>> 
>> 	/* NOTE: driver uses the static register mapping */
>> 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> @@ -1197,6 +1200,10 @@ omap_i2c_probe(struct platform_device *pdev)
>> 
>> 	of_i2c_register_devices(adap);
>> 
>> +	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
>> +	if (IS_ERR(pinctrl))
>> +		dev_warn(dev->dev, "pins are not configured from the driver\n");
>> +
>> 	pm_runtime_mark_last_busy(dev->dev);
>> 	pm_runtime_put_autosuspend(dev->dev);
> 
> This must be just a warning here as otherwise things will break
> badly for drivers doing pinmuxing in bootloader only. Other than
> that:
> 

It is just a warning indeed. Not many boards do the pinctrl dance yet.

> Acked-by: Tony Lindgren <tony@...mide.com>

Regards

-- Pantelis
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