Add iomux configuration api.
Signed-off-by: Peng Fan peng.fan@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++; + } +}