[PATCH 04/11] i2c: imx: add pinctrl support

[Richard Zhao]

On Fri, Apr 27, 2012 at 04:40:57PM +0800, Dong Aisheng wrote:
> On Fri, Apr 27, 2012 at 03:02:58PM +0800, Richard Zhao wrote:
> > Signed-off-by: Richard Zhao <richard.zhao at freescale.com>
> > ---
> >  arch/arm/boot/dts/imx6q-sabrelite.dts |    2 ++
> >  arch/arm/boot/dts/imx6q.dtsi          |   16 ++++++++++++++++
> >  drivers/i2c/busses/i2c-imx.c          |    9 +++++++++
> >  3 files changed, 27 insertions(+), 0 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/imx6q-sabrelite.dts b/arch/arm/boot/dts/imx6q-sabrelite.dts
> > index 4663a4e..4e13293 100644
> > --- a/arch/arm/boot/dts/imx6q-sabrelite.dts
> > +++ b/arch/arm/boot/dts/imx6q-sabrelite.dts
> > @@ -50,6 +50,8 @@
> >  			i2c at 021a0000 { /* I2C1 */
> >  				status = "okay";
> >  				clock-frequency = <100000>;
> > +				pinctrl-names = "default";
> > +				pinctrl-0 = <&pinctrl_i2c1_1>;
> >  
> >  				codec: sgtl5000 at 0a {
> >  					compatible = "fsl,sgtl5000";
> > diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
> > index 2ba32e7..fe8c80d 100644
> > --- a/arch/arm/boot/dts/imx6q.dtsi
> > +++ b/arch/arm/boot/dts/imx6q.dtsi
> > @@ -390,6 +390,22 @@
> >  				reg = <0x020e0000 0x4000>;
> >  
> >  				/* shared pinctrl settings */
> > +				i2c1 {
> > +					pinctrl_i2c1_1: i2c1grp-1 {
> > +						fsl,pins =	"MX6Q_PAD_EIM_D21",
> > +								"MX6Q_PAD_EIM_D28";
> > +						fsl,hysteresis = <1>;
> > +						fsl,mux = <0x16 0x11>;
> > +						fsl,pull = <2>;
> > +						fsl,pue = <1>;
> > +						fsl,pke = <1>;
> > +						fsl,open-drain = <1>;
> > +						fsl,speed = <2>;
> > +						fsl,drive-strength = <6>;
> > +						fsl,slew-rate = <1>;
> > +					};
> The pinctrl binding is changed a bit since v1.
> You may need to change here according to v2 or latter.
Yes, I'll try your v3 with SION.
> 
> > +				};
> > +
> >  				uart4 {
> >  					pinctrl_uart4_1: uart4grp-1 {
> >  						fsl,pins =	"MX6Q_PAD_KEY_COL0",
> > diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> > index dfb84b7..7a52067 100644
> > --- a/drivers/i2c/busses/i2c-imx.c
> > +++ b/drivers/i2c/busses/i2c-imx.c
> > @@ -48,6 +48,7 @@
> >  #include <linux/platform_device.h>
> >  #include <linux/clk.h>
> >  #include <linux/slab.h>
> > +#include <linux/pinctrl/consumer.h>
> >  #include <linux/of.h>
> >  #include <linux/of_device.h>
> >  #include <linux/of_i2c.h>
> > @@ -470,6 +471,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> >  	struct imx_i2c_struct *i2c_imx;
> >  	struct resource *res;
> >  	struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
> > +	struct pinctrl *pct;
> >  	void __iomem *base;
> >  	resource_size_t res_size;
> >  	int irq, bitrate;
> > @@ -520,6 +522,13 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
> >  	i2c_imx->base			= base;
> >  	i2c_imx->res			= res;
> >  
> > +	pct = devm_pinctrl_get_select_default(&pdev->dev);
> You may want to check this change will break other platforms also using this driver.
> Refer to:
> http://www.spinics.net/lists/arm-kernel/msg171538.html
I didn't expect it can go in right now. It surely depends on your dummy pinctrl.

Thanks
Richard
> 
> Regards
> Dong Aisheng