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ARM: k2g: Add support for pin mux configuration

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Add api for configuring pin mux.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Vitaly Andrianov 2015-09-19 16:26:44 +05:30 committed by Tom Rini
parent 235dd6e8d1
commit 5dd6af2ecb
1 changed files with 58 additions and 0 deletions
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58
arch/arm/mach-keystone/include/mach/mux-k2g.h Normal file
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/*
* K2G: Pinmux configuration
*
* (C) Copyright 2015
* Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ASM_ARCH_MUX_K2G_H
#define __ASM_ARCH_MUX_K2G_H
#include <common.h>
#include <asm/io.h>
#define K2G_PADCFG_REG (KS2_DEVICE_STATE_CTRL_BASE + 0x1000)
/*
* 20:19 - buffer class RW fixed
* 18 - rxactive (Input enabled for the pad ) 0 - Di; 1 - En;
* 17 - pulltypesel (0 - PULLDOWN; 1 - PULLUP);
* 16 - pulluden (0 - PULLUP/DOWN EN; 1 - DI);
* 3:0 - muxmode (available modes 0:5)
*/
#define PIN_IEN (1 << 18) /* pin input enabled */
#define PIN_PDIS (1 << 16) /* pull up/down disabled */
#define PIN_PTU (1 << 17) /* pull up */
#define PIN_PTD (0 << 17) /* pull down */
#define MODE(m) ((m) & 0x7)
#define MAX_PIN_N 260
#define MUX_CFG(value, index) \
__raw_writel(\
(value) | \
(__raw_readl(K2G_PADCFG_REG + (index << 2)) & \
(0x3 << 19)),\
(K2G_PADCFG_REG + (index << 2))\
);
struct pin_cfg {
int reg_inx;
u32 val;
};
static inline void configure_pin_mux(struct pin_cfg *pin_mux)
{
if (!pin_mux)
return;
while ((pin_mux->reg_inx >= 0) && (pin_mux->reg_inx < MAX_PIN_N)) {
MUX_CFG(pin_mux->val, pin_mux->reg_inx);
pin_mux++;
}
}
#endif /* __ASM_ARCH_MUX_K2G_H */