pinctrl: imx8ulp: Add pinctrl driver support

Add i.MX8ULP pinctrl driver support.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Link: https://lore.kernel.org/r/20210607061041.2654568-2-ping.bai@nxp.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

3 files changed, 282 insertions, 0 deletions

diff --git a/drivers/pinctrl/freescale/Kconfig b/drivers/pinctrl/freescale/Kconfig
index f294336430cc..21fa21c6547b 100644
--- a/drivers/pinctrl/freescale/Kconfig
+++ b/drivers/pinctrl/freescale/Kconfig
@@ -166,6 +166,13 @@ config PINCTRL_IMX8DXL
 	help
 	  Say Y here to enable the imx8dxl pinctrl driver
 
+config PINCTRL_IMX8ULP
+	tristate "IMX8ULP pinctrl driver"
+	depends on ARCH_MXC
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx8ulp pinctrl driver
+
 config PINCTRL_VF610
 	bool "Freescale Vybrid VF610 pinctrl driver"
 	depends on SOC_VF610
diff --git a/drivers/pinctrl/freescale/Makefile b/drivers/pinctrl/freescale/Makefile
index e476cb671037..c44930b1b362 100644
--- a/drivers/pinctrl/freescale/Makefile
+++ b/drivers/pinctrl/freescale/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_PINCTRL_IMX8MQ)	+= pinctrl-imx8mq.o
 obj-$(CONFIG_PINCTRL_IMX8QM)	+= pinctrl-imx8qm.o
 obj-$(CONFIG_PINCTRL_IMX8QXP)	+= pinctrl-imx8qxp.o
 obj-$(CONFIG_PINCTRL_IMX8DXL)	+= pinctrl-imx8dxl.o
+obj-$(CONFIG_PINCTRL_IMX8ULP)	+= pinctrl-imx8ulp.o
 obj-$(CONFIG_PINCTRL_VF610)	+= pinctrl-vf610.o
 obj-$(CONFIG_PINCTRL_MXS)	+= pinctrl-mxs.o
 obj-$(CONFIG_PINCTRL_IMX23)	+= pinctrl-imx23.o
diff --git a/drivers/pinctrl/freescale/pinctrl-imx8ulp.c b/drivers/pinctrl/freescale/pinctrl-imx8ulp.c
new file mode 100644
index 000000000000..c5db5dfcfcce
--- /dev/null
+++ b/drivers/pinctrl/freescale/pinctrl-imx8ulp.c
@@ -0,0 +1,274 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2021 NXP
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/pinctrl.h>
+
+#include "pinctrl-imx.h"
+
+enum imx8ulp_pads {
+	IMX8ULP_PAD_PTD0 = 0,
+	IMX8ULP_PAD_PTD1,
+	IMX8ULP_PAD_PTD2,
+	IMX8ULP_PAD_PTD3,
+	IMX8ULP_PAD_PTD4,
+	IMX8ULP_PAD_PTD5,
+	IMX8ULP_PAD_PTD6,
+	IMX8ULP_PAD_PTD7,
+	IMX8ULP_PAD_PTD8,
+	IMX8ULP_PAD_PTD9,
+	IMX8ULP_PAD_PTD10,
+	IMX8ULP_PAD_PTD11,
+	IMX8ULP_PAD_PTD12,
+	IMX8ULP_PAD_PTD13,
+	IMX8ULP_PAD_PTD14,
+	IMX8ULP_PAD_PTD15,
+	IMX8ULP_PAD_PTD16,
+	IMX8ULP_PAD_PTD17,
+	IMX8ULP_PAD_PTD18,
+	IMX8ULP_PAD_PTD19,
+	IMX8ULP_PAD_PTD20,
+	IMX8ULP_PAD_PTD21,
+	IMX8ULP_PAD_PTD22,
+	IMX8ULP_PAD_PTD23,
+	IMX8ULP_PAD_RESERVE0,
+	IMX8ULP_PAD_RESERVE1,
+	IMX8ULP_PAD_RESERVE2,
+	IMX8ULP_PAD_RESERVE3,
+	IMX8ULP_PAD_RESERVE4,
+	IMX8ULP_PAD_RESERVE5,
+	IMX8ULP_PAD_RESERVE6,
+	IMX8ULP_PAD_RESERVE7,
+	IMX8ULP_PAD_PTE0,
+	IMX8ULP_PAD_PTE1,
+	IMX8ULP_PAD_PTE2,
+	IMX8ULP_PAD_PTE3,
+	IMX8ULP_PAD_PTE4,
+	IMX8ULP_PAD_PTE5,
+	IMX8ULP_PAD_PTE6,
+	IMX8ULP_PAD_PTE7,
+	IMX8ULP_PAD_PTE8,
+	IMX8ULP_PAD_PTE9,
+	IMX8ULP_PAD_PTE10,
+	IMX8ULP_PAD_PTE11,
+	IMX8ULP_PAD_PTE12,
+	IMX8ULP_PAD_PTE13,
+	IMX8ULP_PAD_PTE14,
+	IMX8ULP_PAD_PTE15,
+	IMX8ULP_PAD_PTE16,
+	IMX8ULP_PAD_PTE17,
+	IMX8ULP_PAD_PTE18,
+	IMX8ULP_PAD_PTE19,
+	IMX8ULP_PAD_PTE20,
+	IMX8ULP_PAD_PTE21,
+	IMX8ULP_PAD_PTE22,
+	IMX8ULP_PAD_PTE23,
+	IMX8ULP_PAD_RESERVE8,
+	IMX8ULP_PAD_RESERVE9,
+	IMX8ULP_PAD_RESERVE10,
+	IMX8ULP_PAD_RESERVE11,
+	IMX8ULP_PAD_RESERVE12,
+	IMX8ULP_PAD_RESERVE13,
+	IMX8ULP_PAD_RESERVE14,
+	IMX8ULP_PAD_RESERVE15,
+	IMX8ULP_PAD_PTF0,
+	IMX8ULP_PAD_PTF1,
+	IMX8ULP_PAD_PTF2,
+	IMX8ULP_PAD_PTF3,
+	IMX8ULP_PAD_PTF4,
+	IMX8ULP_PAD_PTF5,
+	IMX8ULP_PAD_PTF6,
+	IMX8ULP_PAD_PTF7,
+	IMX8ULP_PAD_PTF8,
+	IMX8ULP_PAD_PTF9,
+	IMX8ULP_PAD_PTF10,
+	IMX8ULP_PAD_PTF11,
+	IMX8ULP_PAD_PTF12,
+	IMX8ULP_PAD_PTF13,
+	IMX8ULP_PAD_PTF14,
+	IMX8ULP_PAD_PTF15,
+	IMX8ULP_PAD_PTF16,
+	IMX8ULP_PAD_PTF17,
+	IMX8ULP_PAD_PTF18,
+	IMX8ULP_PAD_PTF19,
+	IMX8ULP_PAD_PTF20,
+	IMX8ULP_PAD_PTF21,
+	IMX8ULP_PAD_PTF22,
+	IMX8ULP_PAD_PTF23,
+	IMX8ULP_PAD_PTF24,
+	IMX8ULP_PAD_PTF25,
+	IMX8ULP_PAD_PTF26,
+	IMX8ULP_PAD_PTF27,
+	IMX8ULP_PAD_PTF28,
+	IMX8ULP_PAD_PTF29,
+	IMX8ULP_PAD_PTF30,
+	IMX8ULP_PAD_PTF31,
+};
+
+/* Pad names for the pinmux subsystem */
+static const struct pinctrl_pin_desc imx8ulp_pinctrl_pads[] = {
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD0),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD1),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD2),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD3),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD4),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD5),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD6),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD7),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD8),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD9),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD10),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD11),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD12),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD13),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD14),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD15),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD16),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD17),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD18),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD19),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD20),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD21),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD22),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD23),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE0),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE1),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE2),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE3),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE4),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE5),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE6),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE7),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE0),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE1),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE2),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE3),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE4),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE5),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE6),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE7),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE8),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE9),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE10),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE11),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE12),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE13),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE14),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE15),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE16),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE17),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE18),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE19),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE20),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE21),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE22),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE23),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE8),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE9),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE10),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE11),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE12),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE13),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE14),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE15),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF0),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF1),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF2),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF3),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF4),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF5),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF6),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF7),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF8),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF9),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF10),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF11),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF12),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF13),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF14),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF15),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF16),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF17),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF18),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF19),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF20),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF21),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF22),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF23),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF24),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF25),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF26),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF27),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF28),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF29),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF30),
+	IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF31),
+};
+
+#define BM_OBE_ENABLED		BIT(17)
+#define BM_IBE_ENABLED		BIT(16)
+#define BM_MUX_MODE		0xf00
+#define BP_MUX_MODE		8
+
+static int imx8ulp_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+					  struct pinctrl_gpio_range *range,
+					  unsigned offset, bool input)
+{
+	struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
+	const struct imx_pin_reg *pin_reg;
+	u32 reg;
+
+	reg = readl(ipctl->base + pin_reg->mux_reg);
+	if (input)
+		reg = (reg & ~BM_OBE_ENABLED) | BM_IBE_ENABLED;
+	else
+		reg = (reg & ~BM_IBE_ENABLED) | BM_OBE_ENABLED;
+	writel(reg, ipctl->base + pin_reg->mux_reg);
+
+	return 0;
+}
+
+static const struct imx_pinctrl_soc_info imx8ulp_pinctrl_info = {
+	.pins = imx8ulp_pinctrl_pads,
+	.npins = ARRAY_SIZE(imx8ulp_pinctrl_pads),
+	.flags = ZERO_OFFSET_VALID | SHARE_MUX_CONF_REG,
+	.gpio_set_direction = imx8ulp_pmx_gpio_set_direction,
+	.mux_mask = BM_MUX_MODE,
+	.mux_shift = BP_MUX_MODE,
+};
+
+static const struct of_device_id imx8ulp_pinctrl_of_match[] = {
+	{ .compatible = "fsl,imx8ulp-iomuxc1", },
+	{ /* sentinel */ }
+};
+
+static int imx8ulp_pinctrl_probe(struct platform_device *pdev)
+{
+	return imx_pinctrl_probe(pdev, &imx8ulp_pinctrl_info);
+}
+
+static struct platform_driver imx8ulp_pinctrl_driver = {
+	.driver = {
+		.name = "imx8ulp-pinctrl",
+		.of_match_table = imx8ulp_pinctrl_of_match,
+		.suppress_bind_attrs = true,
+	},
+	.probe = imx8ulp_pinctrl_probe,
+};
+
+static int __init imx8ulp_pinctrl_init(void)
+{
+	return platform_driver_register(&imx8ulp_pinctrl_driver);
+}
+arch_initcall(imx8ulp_pinctrl_init);
+
+MODULE_AUTHOR("Jacky Bai <ping.bai@nxp.com>");
+MODULE_DESCRIPTION("NXP i.MX8ULP pinctrl driver");
+MODULE_LICENSE("GPL v2");