imx8: add iomux configuration api

Add iomux configuration api.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>

1 files changed, 40 insertions, 0 deletions

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__ */