drivers/pinctrl/nxp/pinctrl-imx9.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2022 NXP
 */

#include <dm/device.h>
#include <dm/device_compat.h>
#include <dm/pinctrl.h>
#include <linux/bitops.h>
#include <linux/types.h>
#include <asm/io.h>

#include "pinctrl-imx.h"

static struct imx_pinctrl_soc_info imx9_pinctrl_soc_info __section(".data") = {
	.flags = ZERO_OFFSET_VALID,
};

static const struct udevice_id imx9_pinctrl_match[] = {
#if IS_ENABLED(CONFIG_IMX93)
	{ .compatible = "fsl,imx93-iomuxc", .data = (ulong)&imx9_pinctrl_soc_info },
#endif
#if IS_ENABLED(CONFIG_IMX91)
	{ .compatible = "fsl,imx91-iomuxc", .data = (ulong)&imx9_pinctrl_soc_info },
#endif
	{ /* sentinel */ }
};

#if CONFIG_IS_ENABLED(CMD_PINMUX)

#if IS_ENABLED(CONFIG_IMX93)
#include "pinctrl-imx93.c"
#elif IS_ENABLED(CONFIG_IMX91)
#include "pinctrl-imx91.c"
#endif

static int imx9_get_pins_count(struct udevice *dev)
{
	return ARRAY_SIZE(imx9_pinctrl_pads);
}

static const char *imx9_get_pin_name(struct udevice *dev, unsigned int selector)
{
	/* sanity checking */
	if (selector != imx9_pinctrl_pads[selector].number) {
		dev_err(dev,
			"selector(%u) not match with imx9_pinctrl_pads[selector].number(%u)\n",
			selector, imx9_pinctrl_pads[selector].number);
		return NULL;
	}

	return imx9_pinctrl_pads[selector].name;
}

static int imx9_get_pin_muxing(struct udevice *dev, unsigned int selector,
				char *buf, int size)
{
	struct imx_pinctrl_priv *priv = dev_get_priv(dev);
	struct imx_pinctrl_soc_info *info = priv->info;
	u32 mux_reg = selector << 2;
	u32 mux_mode = readl(info->base + mux_reg);
	u32 sion = mux_mode >> 4;

	snprintf(buf, size, "Function(%d) SION(%d) at: 0x%p", mux_mode & 0x7, sion,
		 info->base + mux_reg);

	return 0;
}
#endif

static const struct pinctrl_ops imx9_pinctrl_ops = {
#if CONFIG_IS_ENABLED(CMD_PINMUX)
	.get_pin_name = imx9_get_pin_name,
	.get_pins_count = imx9_get_pins_count,
	.get_pin_muxing = imx9_get_pin_muxing,
#endif
	.set_state = imx_pinctrl_set_state_mmio,
};

U_BOOT_DRIVER(imx9_pinctrl) = {
	.name = "imx9-pinctrl",
	.id = UCLASS_PINCTRL,
	.of_match = of_match_ptr(imx9_pinctrl_match),
	.probe = imx_pinctrl_probe_mmio,
	.remove = imx_pinctrl_remove_mmio,
	.priv_auto	= sizeof(struct imx_pinctrl_priv),
	.ops = &imx9_pinctrl_ops,
	.flags = DM_FLAG_PRE_RELOC,
};