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u-boot/arch/arm/mach-imx/imx8ulp/iomux.c
Peng Fan fdfa214acf arm: imx8ulp: add iomuxc support
Add i.MX8ULP iomuxc support

Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-08-09 14:46:51 +02:00

58 lines
1.5 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2020-2021 NXP
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
static void *base = (void *)IOMUXC_BASE_ADDR;
static void *base_mports = (void *)(0x280A1000);
/*
* configures a single pad in the iomuxer
*/
void imx8ulp_iomux_setup_pad(iomux_cfg_t pad)
{
u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
u32 sel_input_ofs =
(pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
u32 sel_input =
(pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
u32 pad_ctrl_ofs = mux_ctrl_ofs;
u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
if (mux_mode & IOMUX_CONFIG_MPORTS) {
mux_mode &= ~IOMUX_CONFIG_MPORTS;
base = base_mports;
} else {
base = (void *)IOMUXC_BASE_ADDR;
}
__raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) &
IOMUXC_PCR_MUX_ALT_MASK), base + mux_ctrl_ofs);
if (sel_input_ofs)
__raw_writel((sel_input << IOMUXC_PSMI_IMUX_ALT_SHIFT), base + sel_input_ofs);
if (!(pad_ctrl & NO_PAD_CTRL))
__raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) &
IOMUXC_PCR_MUX_ALT_MASK) |
(pad_ctrl & (~IOMUXC_PCR_MUX_ALT_MASK)),
base + pad_ctrl_ofs);
}
/* configures a list of pads within declared with IOMUX_PADS macro */
void imx8ulp_iomux_setup_multiple_pads(iomux_cfg_t const *pad_list, u32 count)
{
iomux_cfg_t const *p = pad_list;
int i;
for (i = 0; i < count; i++) {
imx8ulp_iomux_setup_pad(*p);
p++;
}
}