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i.MX: iomuxv3: Add low-level pad code to headers 

Add a basic low-level pad configuration function that can be used to
implement early boot pin configuration code as well as shared with
various iomuxv3 and vf610 drivers.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Andrey Smirnov 2017-01-10 07:09:03 -08:00 committed by Sascha Hauer
parent 21921f7f41
commit b2282c18a4
1 changed files with 28 additions and 0 deletions
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28
arch/arm/mach-imx/include/mach/iomux-v3.h
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@ -16,6 +16,8 @@
#ifndef __MACH_IOMUX_V3_H__
#define __MACH_IOMUX_V3_H__
#include <io.h>
/*
* build IOMUX_PAD structure
*
@ -104,6 +106,32 @@ typedef u64 iomux_v3_cfg_t;
#define IOMUX_CONFIG_SION (0x1 << 4)
#define SHARE_MUX_CONF_REG 0x1
#define ZERO_OFFSET_VALID 0x2
static inline void iomux_v3_setup_pad(void __iomem *iomux, unsigned int flags,
u32 mux_reg, u32 conf_reg, u32 input_reg,
u32 mux_val, u32 conf_val, u32 input_val)
{
const bool mux_ok = !!mux_reg || (flags & ZERO_OFFSET_VALID);
const bool conf_ok = !!conf_reg;
const bool input_ok = !!input_reg;
if (flags & SHARE_MUX_CONF_REG) {
mux_val |= conf_val;
} else {
if (conf_ok)
writel(conf_val, iomux + conf_reg);
}
if (mux_ok)
writel(mux_val, iomux + mux_reg);
if (input_ok)
writel(input_val, iomux + input_reg);
}
/*
* setups a single pad in the iomuxer
*/