[U-Boot] [PATCH] dts: pinctrl: Provide IMX_PAD_SION definition for imx53 pinctrl

[Lukasz Majewski]

The SION pin must be set for proper operation of I2C when DM is enabled.

When legacy I2C is used, this bit is set implicitly in the u-boot code:
arch/arm/include/asm/arch-mx5/iomux-mx53.h:92:
MX53_PAD_KEY_ROW3__I2C2_SDA = IOMUX_PAD(0x368, 0x040, 4 |
	IOMUX_CONFIG_SION, 0x820, 0, NO_PAD_CTRL),

The Linux kernel uses similar approach with:
arch/arm/boot/dts/imx53-tqma53.dtsi:182:
	MX53_PAD_KEY_ROW3__I2C2_SDA             0xc0000000

After applying this patch it is possible to have the I2C working with DM
on imx53 devices:

MX53_PAD_KEY_ROW3__I2C2_SDA (0x1ee | IMX_PAD_SION)

Signed-off-by: Lukasz Majewski <lukma at denx.de>
---

 arch/arm/dts/imx53-pinfunc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/dts/imx53-pinfunc.h b/arch/arm/dts/imx53-pinfunc.h
index aec406bc65..baf710d0df 100644
--- a/arch/arm/dts/imx53-pinfunc.h
+++ b/arch/arm/dts/imx53-pinfunc.h
@@ -10,6 +10,7 @@
 #ifndef __DTS_IMX53_PINFUNC_H
 #define __DTS_IMX53_PINFUNC_H
 
+#define IMX_PAD_SION       0x40000000
 /*
  * The pin function ID is a tuple of
  * <mux_reg conf_reg input_reg mux_mode input_val>
-- 
2.11.0