Add iomux configuration api.
Signed-off-by: Peng Fan <peng....@nxp.com>
---
arch/arm/include/asm/arch-imx8/iomux.h | 40 +++++++++++++++++++++++++++++++
arch/arm/mach-imx/imx8/Makefile | 2 +-
arch/arm/mach-imx/imx8/iomux.c | 43 ++++++++++++++++++++++++++++++++++
3 files changed, 84 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/include/asm/arch-imx8/iomux.h
create mode 100644 arch/arm/mach-imx/imx8/iomux.c
diff --git a/arch/arm/include/asm/arch-imx8/iomux.h
b/arch/arm/include/asm/arch-imx8/iomux.h
new file mode 100644
index 0000000000..bedd01bfd8
--- /dev/null
+++ b/arch/arm/include/asm/arch-imx8/iomux.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2018 NXP
+ */
+
+#ifndef __ASM_ARCH_IMX8_IOMUX_H__
+#define __ASM_ARCH_IMX8_IOMUX_H__
+
+/*
+ * We use 64bits value for iomux settings.
+ * High 32bits are used for padring register value,
+ * low 16bits are used for pin index.
+ */
+typedef u64 iomux_cfg_t;
+
+#define PADRING_IFMUX_EN_SHIFT 31
+#define PADRING_IFMUX_EN_MASK BIT(31)
+#define PADRING_GP_EN_SHIFT 30
+#define PADRING_GP_EN_MASK BIT(30)
+#define PADRING_IFMUX_SHIFT 27
+#define PADRING_IFMUX_MASK GENMASK(29, 27)
+#define PADRING_CONFIG_SHIFT 25
+#define PADRING_LPCONFIG_SHIFT 23
+#define PADRING_PULL_SHIFT 5
+#define PADRING_DSE_SHIFT 0
+
+#define MUX_PAD_CTRL_SHIFT 32
+#define MUX_PAD_CTRL_MASK ((iomux_cfg_t)0xFFFFFFFF << MUX_PAD_CTRL_SHIFT)
+#define MUX_PAD_CTRL(x) ((iomux_cfg_t)(x) << MUX_PAD_CTRL_SHIFT)
+#define MUX_MODE_SHIFT (PADRING_IFMUX_SHIFT + MUX_PAD_CTRL_SHIFT)
+#define MUX_MODE_MASK ((iomux_cfg_t)0x7 << MUX_MODE_SHIFT)
+#define PIN_ID_MASK ((iomux_cfg_t)0xFFFF)
+
+/* Valid mux alt0 to alt7 */
+#define MUX_MODE_ALT(x) (((iomux_cfg_t)(x) << MUX_MODE_SHIFT) &
\
+ MUX_MODE_MASK)
+
+void imx8_iomux_setup_pad(iomux_cfg_t pad);
+void imx8_iomux_setup_multiple_pads(iomux_cfg_t const *pad_list, u32 count);
+#endif /* __ASM_ARCH_IMX8_IOMUX_H__ */
diff --git a/arch/arm/mach-imx/imx8/Makefile b/arch/arm/mach-imx/imx8/Makefile
index 57876139a1..31ad169ccf 100644
--- a/arch/arm/mach-imx/imx8/Makefile
+++ b/arch/arm/mach-imx/imx8/Makefile
@@ -4,4 +4,4 @@
# SPDX-License-Identifier: GPL-2.0+
#
-obj-y += cpu.o
+obj-y += cpu.o iomux.o
diff --git a/arch/arm/mach-imx/imx8/iomux.c b/arch/arm/mach-imx/imx8/iomux.c
new file mode 100644
index 0000000000..0ade85fb8f
--- /dev/null
+++ b/arch/arm/mach-imx/imx8/iomux.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/sci/sci.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * configures a single pad in the iomuxer
+ */
+void imx8_iomux_setup_pad(iomux_cfg_t pad)
+{
+ sc_pad_t pin_id = pad & PIN_ID_MASK;
+ int ret;
+
+ u32 val = (u32)((pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT);
+
+ val |= PADRING_IFMUX_EN_MASK;
+ val |= PADRING_GP_EN_MASK;
+
+ ret = sc_pad_set(-1, pin_id, val);
+ if (ret)
+ printf("sc_pad_set failed!, pin: %u, val: 0x%x\n", pin_id, val);
+
+ debug("iomux: pin %d, val = 0x%x\n", pin_id, val);
+}
+
+/* configures a list of pads within declared with IOMUX_PADS macro */
+void imx8_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++) {
+ imx8_iomux_setup_pad(*p);
+ p++;
+ }
+}
--
2.14.1
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