arm: imx8ulp: add iomuxc support

Add i.MX8ULP iomuxc support

Signed-off-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 55 insertions, 1 deletions

diff --git a/arch/arm/mach-imx/imx8ulp/iomux.c b/arch/arm/mach-imx/imx8ulp/iomux.c
index c52ccdeaea..c6d20f5468 100644
--- a/arch/arm/mach-imx/imx8ulp/iomux.c
+++ b/arch/arm/mach-imx/imx8ulp/iomux.c
@@ -1,4 +1,58 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright 2020 NXP
+ * 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++;
+	}
+}