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dts: pinctrl: Provide IMX_PAD_SION definition for imx53 pinctrl

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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@denx.de>
This commit is contained in:
Lukasz Majewski 2018-04-26 13:19:13 +02:00 committed by Stefano Babic
parent 0a107afde6
commit 768cce8b79
1 changed files with 1 additions and 0 deletions
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arch/arm/dts/imx53-pinfunc.h
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@ -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>