Port drivers/pinctrl/pinctrl-ocelot.c from the Linux kernel as a pinmux + GPIO controller for the Microsemi/Microchip Ocelot SoC family. The drop is reduced to the LAN969X (lan9691) subset that barebox needs to bring the board up; the other SoC variants are dropped to keep the file reviewable. Identifier and structure layout are kept compatible with Linux so future feature backports stay mechanical.
Ported from Linux drivers/pinctrl/pinctrl-ocelot.c at tag v7.1-rc7 Signed-off-by: Oleksij Rempel <[email protected]> --- drivers/pinctrl/Kconfig | 10 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-ocelot.c | 574 +++++++++++++++++++++++++++++++ 3 files changed, 585 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-ocelot.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 1d237db106ba..8cb6e2efebdf 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -111,6 +111,16 @@ config PINCTRL_STM32 help Pinmux and GPIO controller found on STM32 family +config PINCTRL_OCELOT + bool "Pinctrl driver for the Microsemi Ocelot family of SoCs" + depends on OFDEVICE + select GPIOLIB + help + Pinmux + GPIO controller driver for the Microsemi/Microchip Ocelot + family. Currently implements the LAN969X (lan9691) subset matched + with the same identifiers as Linux's drivers/pinctrl/pinctrl-ocelot.c + so future Linux patches backport with minimal churn. + source "drivers/pinctrl/sunxi/Kconfig" endif diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 3bc718d35539..6dd11c0d64b0 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_PINCTRL_TEGRA30) += pinctrl-tegra30.o obj-$(CONFIG_PINCTRL_TEGRA_XUSB) += pinctrl-tegra-xusb.o obj-$(CONFIG_PINCTRL_VF610) += pinctrl-vf610.o obj-$(CONFIG_PINCTRL_STM32) += pinctrl-stm32.o +obj-$(CONFIG_PINCTRL_OCELOT) += pinctrl-ocelot.o obj-$(CONFIG_ARCH_MVEBU) += mvebu/ obj-$(CONFIG_ARCH_SUNXI) += sunxi/ diff --git a/drivers/pinctrl/pinctrl-ocelot.c b/drivers/pinctrl/pinctrl-ocelot.c new file mode 100644 index 000000000000..9445c7bd85d7 --- /dev/null +++ b/drivers/pinctrl/pinctrl-ocelot.c @@ -0,0 +1,574 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR MIT) +/* + * Microchip ocelot family pinmux driver — LAN969X subset. + * + * Copyright (c) 2017 Microsemi Corporation + * Copyright (c) 2025 Microchip Technology Inc. + * + * Ported from Linux drivers/pinctrl/pinctrl-ocelot.c. Identifiers, struct + * layouts, and pin/function tables are kept aligned with Linux so future + * fixes can be backported with minimal context churn. + */ + +#include <common.h> +#include <init.h> +#include <driver.h> +#include <gpio.h> +#include <io.h> +#include <of.h> +#include <pinctrl.h> +#include <linux/bitfield.h> +#include <linux/bitops.h> +#include <linux/regmap.h> + +#define OCELOT_FUNC_PER_PIN 4 + +/* GPIO standard registers - byte offsets, identical to Linux. REG/REG_ALT + * scale these by info->stride to step over the 32-bit-bank groups. + */ +#define OCELOT_GPIO_OUT_SET 0x0 +#define OCELOT_GPIO_OUT_CLR 0x4 +#define OCELOT_GPIO_OUT 0x8 +#define OCELOT_GPIO_IN 0xc +#define OCELOT_GPIO_OE 0x10 +#define OCELOT_GPIO_INTR 0x14 +#define OCELOT_GPIO_INTR_ENA 0x18 +#define OCELOT_GPIO_INTR_IDENT 0x1c +#define OCELOT_GPIO_ALT0 0x20 +#define OCELOT_GPIO_ALT1 0x24 +#define OCELOT_GPIO_SD_MAP 0x28 + +/* + * Function enum — LAN969X subset of Linux's full enum, kept in Linux's + * ordering. Other SoCs' FUNC_* entries are intentionally omitted; add + * them when porting more SoCs. + */ +enum { + FUNC_CAN0_a, + FUNC_CAN0_b, + FUNC_CAN1, + FUNC_CLKMON, + FUNC_NONE, + FUNC_FAN, + FUNC_FC, + FUNC_FC_SHRD, + FUNC_FUSA, + FUNC_GPIO, + FUNC_IRQ0, + FUNC_IRQ1, + FUNC_IRQ3, + FUNC_IRQ4, + FUNC_MIIM, + FUNC_MIIM_Sa, + FUNC_MIIM_IRQ, + FUNC_PCIE_PERST, + FUNC_PTPSYNC_0, + FUNC_PTPSYNC_1, + FUNC_PTPSYNC_2, + FUNC_PTPSYNC_3, + FUNC_PTPSYNC_4, + FUNC_PTPSYNC_5, + FUNC_PTPSYNC_6, + FUNC_PTPSYNC_7, + FUNC_QSPI1, + FUNC_R, + FUNC_SD, + FUNC_SFP_SD, + FUNC_SGPIO_a, + FUNC_SYNCE, + FUNC_TWI, + FUNC_USB_POWER, + FUNC_USB2PHY_RST, + FUNC_USB_OVER_DETECT, + FUNC_USB_ULPI, + FUNC_EMMC_SD, + FUNC_MAX +}; + +static const char *const ocelot_function_names[] = { + [FUNC_CAN0_a] = "can0_a", + [FUNC_CAN0_b] = "can0_b", + [FUNC_CAN1] = "can1", + [FUNC_CLKMON] = "clkmon", + [FUNC_NONE] = "none", + [FUNC_FAN] = "fan", + [FUNC_FC] = "fc", + [FUNC_FC_SHRD] = "fc_shrd", + [FUNC_FUSA] = "fusa", + [FUNC_GPIO] = "gpio", + [FUNC_IRQ0] = "irq0", + [FUNC_IRQ1] = "irq1", + [FUNC_IRQ3] = "irq3", + [FUNC_IRQ4] = "irq4", + [FUNC_MIIM] = "miim", + [FUNC_MIIM_Sa] = "miim_slave_a", + [FUNC_MIIM_IRQ] = "miim_irq", + [FUNC_PCIE_PERST] = "pcie_perst", + [FUNC_PTPSYNC_0] = "ptpsync_0", + [FUNC_PTPSYNC_1] = "ptpsync_1", + [FUNC_PTPSYNC_2] = "ptpsync_2", + [FUNC_PTPSYNC_3] = "ptpsync_3", + [FUNC_PTPSYNC_4] = "ptpsync_4", + [FUNC_PTPSYNC_5] = "ptpsync_5", + [FUNC_PTPSYNC_6] = "ptpsync_6", + [FUNC_PTPSYNC_7] = "ptpsync_7", + [FUNC_QSPI1] = "qspi1", + [FUNC_R] = "reserved", + [FUNC_SD] = "sd", + [FUNC_SFP_SD] = "sfp_sd", + [FUNC_SGPIO_a] = "sgpio_a", + [FUNC_SYNCE] = "synce", + [FUNC_TWI] = "twi", + [FUNC_USB_POWER] = "usb_power", + [FUNC_USB2PHY_RST] = "usb2phy_rst", + [FUNC_USB_OVER_DETECT] = "usb_over_detect", + [FUNC_USB_ULPI] = "usb_ulpi", + [FUNC_EMMC_SD] = "emmc_sd", +}; + +struct ocelot_pin_caps { + unsigned int pin; + unsigned char functions[OCELOT_FUNC_PER_PIN]; + unsigned char a_functions[OCELOT_FUNC_PER_PIN]; /* Additional functions */ +}; + +struct ocelot_pin_desc { + unsigned int number; + const char *name; + struct ocelot_pin_caps *drv_data; +}; + +#define LAN969X_P(p, f0, f1, f2, f3, f4, f5, f6, f7) \ +static struct ocelot_pin_caps lan969x_pin_##p = { \ + .pin = p, \ + .functions = { \ + FUNC_##f0, FUNC_##f1, FUNC_##f2, \ + FUNC_##f3 \ + }, \ + .a_functions = { \ + FUNC_##f4, FUNC_##f5, FUNC_##f6, \ + FUNC_##f7 \ + }, \ +} + +/* Pinmuxing table taken from data sheet */ +/* Pin FUNC0 FUNC1 FUNC2 FUNC3 FUNC4 FUNC5 FUNC6 FUNC7 */ +LAN969X_P(0, GPIO, IRQ0, FC_SHRD, PCIE_PERST, NONE, NONE, NONE, R); +LAN969X_P(1, GPIO, IRQ1, FC_SHRD, USB_POWER, NONE, NONE, NONE, R); +LAN969X_P(2, GPIO, FC, NONE, NONE, NONE, NONE, NONE, R); +LAN969X_P(3, GPIO, FC, NONE, NONE, NONE, NONE, NONE, R); +LAN969X_P(4, GPIO, FC, NONE, NONE, NONE, NONE, NONE, R); +LAN969X_P(5, GPIO, SGPIO_a, NONE, CLKMON, NONE, NONE, NONE, R); +LAN969X_P(6, GPIO, SGPIO_a, NONE, CLKMON, NONE, NONE, NONE, R); +LAN969X_P(7, GPIO, SGPIO_a, NONE, CLKMON, NONE, NONE, NONE, R); +LAN969X_P(8, GPIO, SGPIO_a, NONE, CLKMON, NONE, NONE, NONE, R); +LAN969X_P(9, GPIO, MIIM, MIIM_Sa, CLKMON, NONE, NONE, NONE, R); +LAN969X_P(10, GPIO, MIIM, MIIM_Sa, CLKMON, NONE, NONE, NONE, R); +LAN969X_P(11, GPIO, MIIM_IRQ, MIIM_Sa, CLKMON, NONE, NONE, NONE, R); +LAN969X_P(12, GPIO, IRQ3, FC_SHRD, USB2PHY_RST, NONE, NONE, NONE, R); +LAN969X_P(13, GPIO, IRQ4, FC_SHRD, USB_OVER_DETECT, NONE, NONE, NONE, R); +LAN969X_P(14, GPIO, EMMC_SD, QSPI1, FC, NONE, NONE, NONE, R); +LAN969X_P(15, GPIO, EMMC_SD, QSPI1, FC, NONE, NONE, NONE, R); +LAN969X_P(16, GPIO, EMMC_SD, QSPI1, FC, NONE, NONE, NONE, R); +LAN969X_P(17, GPIO, EMMC_SD, QSPI1, PTPSYNC_0, USB_POWER, NONE, NONE, R); +LAN969X_P(18, GPIO, EMMC_SD, QSPI1, PTPSYNC_1, USB2PHY_RST, NONE, NONE, R); +LAN969X_P(19, GPIO, EMMC_SD, QSPI1, PTPSYNC_2, USB_OVER_DETECT, NONE, NONE, R); +LAN969X_P(20, GPIO, EMMC_SD, NONE, FC_SHRD, NONE, NONE, NONE, R); +LAN969X_P(21, GPIO, EMMC_SD, NONE, FC_SHRD, NONE, NONE, NONE, R); +LAN969X_P(22, GPIO, EMMC_SD, NONE, FC_SHRD, NONE, NONE, NONE, R); +LAN969X_P(23, GPIO, EMMC_SD, NONE, FC_SHRD, NONE, NONE, NONE, R); +LAN969X_P(24, GPIO, EMMC_SD, NONE, NONE, NONE, NONE, NONE, R); +LAN969X_P(25, GPIO, FAN, FUSA, CAN0_a, QSPI1, NONE, NONE, R); +LAN969X_P(26, GPIO, FAN, FUSA, CAN0_a, QSPI1, NONE, NONE, R); +LAN969X_P(27, GPIO, SYNCE, FC, MIIM, QSPI1, NONE, NONE, R); +LAN969X_P(28, GPIO, SYNCE, FC, MIIM, QSPI1, NONE, NONE, R); +LAN969X_P(29, GPIO, SYNCE, FC, MIIM_IRQ, QSPI1, NONE, NONE, R); +LAN969X_P(30, GPIO, PTPSYNC_0, USB_ULPI, FC_SHRD, QSPI1, NONE, NONE, R); +LAN969X_P(31, GPIO, PTPSYNC_1, USB_ULPI, FC_SHRD, NONE, NONE, NONE, R); +LAN969X_P(32, GPIO, PTPSYNC_2, USB_ULPI, FC_SHRD, NONE, NONE, NONE, R); +LAN969X_P(33, GPIO, SD, USB_ULPI, FC_SHRD, NONE, NONE, NONE, R); +LAN969X_P(34, GPIO, SD, USB_ULPI, CAN1, FC_SHRD, NONE, NONE, R); +LAN969X_P(35, GPIO, SD, USB_ULPI, CAN1, FC_SHRD, NONE, NONE, R); +LAN969X_P(36, GPIO, SD, USB_ULPI, PCIE_PERST, FC_SHRD, NONE, NONE, R); +LAN969X_P(37, GPIO, SD, USB_ULPI, CAN0_b, NONE, NONE, NONE, R); +LAN969X_P(38, GPIO, SD, USB_ULPI, CAN0_b, NONE, NONE, NONE, R); +LAN969X_P(39, GPIO, SD, USB_ULPI, MIIM, NONE, NONE, NONE, R); +LAN969X_P(40, GPIO, SD, USB_ULPI, MIIM, NONE, NONE, NONE, R); +LAN969X_P(41, GPIO, SD, USB_ULPI, MIIM_IRQ, NONE, NONE, NONE, R); +LAN969X_P(42, GPIO, PTPSYNC_3, CAN1, NONE, NONE, NONE, NONE, R); +LAN969X_P(43, GPIO, PTPSYNC_4, CAN1, NONE, NONE, NONE, NONE, R); +LAN969X_P(44, GPIO, PTPSYNC_5, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(45, GPIO, PTPSYNC_6, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(46, GPIO, PTPSYNC_7, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(47, GPIO, NONE, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(48, GPIO, NONE, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(49, GPIO, NONE, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(50, GPIO, NONE, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(51, GPIO, NONE, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(52, GPIO, FAN, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(53, GPIO, FAN, SFP_SD, NONE, NONE, NONE, NONE, R); +LAN969X_P(54, GPIO, SYNCE, FC, NONE, NONE, NONE, NONE, R); +LAN969X_P(55, GPIO, SYNCE, FC, NONE, NONE, NONE, NONE, R); +LAN969X_P(56, GPIO, SYNCE, FC, NONE, NONE, NONE, NONE, R); +LAN969X_P(57, GPIO, SFP_SD, FC_SHRD, TWI, PTPSYNC_3, NONE, NONE, R); +LAN969X_P(58, GPIO, SFP_SD, FC_SHRD, TWI, PTPSYNC_4, NONE, NONE, R); +LAN969X_P(59, GPIO, SFP_SD, FC_SHRD, TWI, PTPSYNC_5, NONE, NONE, R); +LAN969X_P(60, GPIO, SFP_SD, FC_SHRD, TWI, PTPSYNC_6, NONE, NONE, R); +LAN969X_P(61, GPIO, MIIM, FC_SHRD, TWI, NONE, NONE, NONE, R); +LAN969X_P(62, GPIO, MIIM, FC_SHRD, TWI, NONE, NONE, NONE, R); +LAN969X_P(63, GPIO, MIIM_IRQ, FC_SHRD, TWI, NONE, NONE, NONE, R); +LAN969X_P(64, GPIO, FC, FC_SHRD, TWI, NONE, NONE, NONE, R); +LAN969X_P(65, GPIO, FC, FC_SHRD, TWI, NONE, NONE, NONE, R); +LAN969X_P(66, GPIO, FC, FC_SHRD, TWI, NONE, NONE, NONE, R); + +#define LAN969X_PIN(n) { \ + .number = n, \ + .name = "GPIO_"#n, \ + .drv_data = &lan969x_pin_##n \ +} + +static const struct ocelot_pin_desc lan969x_pins[] = { + LAN969X_PIN(0), LAN969X_PIN(1), LAN969X_PIN(2), LAN969X_PIN(3), + LAN969X_PIN(4), LAN969X_PIN(5), LAN969X_PIN(6), LAN969X_PIN(7), + LAN969X_PIN(8), LAN969X_PIN(9), LAN969X_PIN(10), LAN969X_PIN(11), + LAN969X_PIN(12), LAN969X_PIN(13), LAN969X_PIN(14), LAN969X_PIN(15), + LAN969X_PIN(16), LAN969X_PIN(17), LAN969X_PIN(18), LAN969X_PIN(19), + LAN969X_PIN(20), LAN969X_PIN(21), LAN969X_PIN(22), LAN969X_PIN(23), + LAN969X_PIN(24), LAN969X_PIN(25), LAN969X_PIN(26), LAN969X_PIN(27), + LAN969X_PIN(28), LAN969X_PIN(29), LAN969X_PIN(30), LAN969X_PIN(31), + LAN969X_PIN(32), LAN969X_PIN(33), LAN969X_PIN(34), LAN969X_PIN(35), + LAN969X_PIN(36), LAN969X_PIN(37), LAN969X_PIN(38), LAN969X_PIN(39), + LAN969X_PIN(40), LAN969X_PIN(41), LAN969X_PIN(42), LAN969X_PIN(43), + LAN969X_PIN(44), LAN969X_PIN(45), LAN969X_PIN(46), LAN969X_PIN(47), + LAN969X_PIN(48), LAN969X_PIN(49), LAN969X_PIN(50), LAN969X_PIN(51), + LAN969X_PIN(52), LAN969X_PIN(53), LAN969X_PIN(54), LAN969X_PIN(55), + LAN969X_PIN(56), LAN969X_PIN(57), LAN969X_PIN(58), LAN969X_PIN(59), + LAN969X_PIN(60), LAN969X_PIN(61), LAN969X_PIN(62), LAN969X_PIN(63), + LAN969X_PIN(64), LAN969X_PIN(65), LAN969X_PIN(66), +}; + +struct ocelot_pinctrl_desc { + const char *name; + const struct ocelot_pin_desc *pins; + unsigned int npins; +}; + +struct ocelot_pinctrl { + struct device *dev; + struct pinctrl_device pctl; + struct gpio_chip gpio_chip; + struct regmap *map; + struct regmap *pincfg; + const struct ocelot_pinctrl_desc *desc; + u8 stride; + u8 altm_stride; +}; + +#define to_ocelot_pctl(pdev) container_of(pdev, struct ocelot_pinctrl, pctl) +#define to_ocelot_gpio(gc) container_of(gc, struct ocelot_pinctrl, gpio_chip) + +static const struct ocelot_pinctrl_desc lan969x_desc = { + .name = "lan969x-pinctrl", + .pins = lan969x_pins, + .npins = ARRAY_SIZE(lan969x_pins), +}; + +/* + * Register stride: each ALT0/ALT1/ALT2 group of pin-mux bits spans + * (info->stride) 32-bit words to cover all pins; the LAN969X 78-pin layout + * also uses altm_stride == stride. + */ +#define REG(r, info, p) ((r) * (info)->stride + (4 * ((p) / 32))) +#define REG_ALT(msb, info, p) \ + (OCELOT_GPIO_ALT0 * (info)->stride + 4 * ((msb) + ((info)->altm_stride * ((p) / 32)))) + +static int ocelot_pin_function_idx(struct ocelot_pinctrl *info, + unsigned int pin, unsigned int function) +{ + struct ocelot_pin_caps *p = info->desc->pins[pin].drv_data; + int i; + + for (i = 0; i < OCELOT_FUNC_PER_PIN; i++) { + if (function == p->functions[i]) + return i; + if (function == p->a_functions[i]) + return i + OCELOT_FUNC_PER_PIN; + } + + return -1; +} + +/* 3-bit pinmux encoding across ALT0/ALT1/ALT2, used by LAN966X and LAN969X. */ +static int lan969x_pinmux_set_mux(struct ocelot_pinctrl *info, + unsigned int group, unsigned int selector) +{ + struct ocelot_pin_caps *pin = info->desc->pins[group].drv_data; + unsigned int p = pin->pin % 32; + int f; + + f = ocelot_pin_function_idx(info, group, selector); + if (f < 0) + return -EINVAL; + + /* + * f is encoded on three bits. + * bit 0 of f goes in BIT(pin) of ALT[0], bit 1 of f goes in BIT(pin) of + * ALT[1], bit 2 of f goes in BIT(pin) of ALT[2] + * Note: ALT0/ALT1/ALT2 are organized specially for 78 gpio targets + */ + regmap_update_bits(info->map, REG_ALT(0, info, pin->pin), + BIT(p), f << p); + regmap_update_bits(info->map, REG_ALT(1, info, pin->pin), + BIT(p), (f >> 1) << p); + regmap_update_bits(info->map, REG_ALT(2, info, pin->pin), + BIT(p), (f >> 2) << p); + + return 0; +} + +/* ----- GPIO ops ----- */ + +static int ocelot_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct ocelot_pinctrl *info = to_ocelot_gpio(chip); + unsigned int val; + + regmap_read(info->map, REG(OCELOT_GPIO_IN, info, offset), &val); + + return !!(val & BIT(offset % 32)); +} + +static int ocelot_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct ocelot_pinctrl *info = to_ocelot_gpio(chip); + + if (value) + regmap_write(info->map, REG(OCELOT_GPIO_OUT_SET, info, offset), + BIT(offset % 32)); + else + regmap_write(info->map, REG(OCELOT_GPIO_OUT_CLR, info, offset), + BIT(offset % 32)); + + return 0; +} + +static int ocelot_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct ocelot_pinctrl *info = to_ocelot_gpio(chip); + unsigned int val; + + regmap_read(info->map, REG(OCELOT_GPIO_OE, info, offset), &val); + + /* GPIOF_DIR_OUT == 0, GPIOF_DIR_IN == 1 */ + return (val & BIT(offset % 32)) ? 0 : 1; +} + +static int ocelot_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + struct ocelot_pinctrl *info = to_ocelot_gpio(chip); + unsigned int pin = BIT(offset % 32); + + regmap_update_bits(info->map, REG(OCELOT_GPIO_OE, info, offset), + pin, 0); + + return 0; +} + +static int ocelot_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct ocelot_pinctrl *info = to_ocelot_gpio(chip); + unsigned int pin = BIT(offset % 32); + + if (value) + regmap_write(info->map, REG(OCELOT_GPIO_OUT_SET, info, offset), + pin); + else + regmap_write(info->map, REG(OCELOT_GPIO_OUT_CLR, info, offset), + pin); + + regmap_update_bits(info->map, REG(OCELOT_GPIO_OE, info, offset), + pin, pin); + + return 0; +} + +static struct gpio_ops ocelot_gpio_ops = { + .direction_input = ocelot_gpio_direction_input, + .direction_output = ocelot_gpio_direction_output, + .get_direction = ocelot_gpio_get_direction, + .get = ocelot_gpio_get, + .set = ocelot_gpio_set, +}; + +/* ----- pinctrl ops ----- */ + +static int ocelot_lookup_function(const char *name) +{ + int i; + + for (i = 0; i < FUNC_MAX; i++) { + if (ocelot_function_names[i] && + strcmp(name, ocelot_function_names[i]) == 0) + return i; + } + return -1; +} + +static int ocelot_lookup_pin(struct ocelot_pinctrl *info, const char *name) +{ + unsigned int i; + + for (i = 0; i < info->desc->npins; i++) + if (strcmp(info->desc->pins[i].name, name) == 0) + return i; + return -1; +} + +static int ocelot_pinctrl_set_state(struct pinctrl_device *pdev, + struct device_node *np) +{ + struct ocelot_pinctrl *info = to_ocelot_pctl(pdev); + const char *func_name; + const char **pin_names; + int func, ret, n, i; + + ret = of_property_read_string(np, "function", &func_name); + if (ret < 0) + return 0; + + func = ocelot_lookup_function(func_name); + if (func < 0) { + dev_err(pdev->dev, "unknown function %s\n", func_name); + return -EINVAL; + } + + n = of_property_count_strings(np, "pins"); + if (n <= 0) + return 0; + + pin_names = xzalloc(n * sizeof(*pin_names)); + ret = of_property_read_string_array(np, "pins", pin_names, n); + if (ret < 0) + goto out; + + for (i = 0; i < n; i++) { + int idx = ocelot_lookup_pin(info, pin_names[i]); + + if (idx < 0) { + dev_err(pdev->dev, "unknown pin %s\n", pin_names[i]); + ret = -EINVAL; + goto out; + } + ret = lan969x_pinmux_set_mux(info, idx, func); + if (ret < 0) { + dev_err(pdev->dev, + "failed to set pin %s to function %s\n", + pin_names[i], func_name); + goto out; + } + } + ret = 0; +out: + free(pin_names); + return ret; +} + +static struct pinctrl_ops ocelot_pinctrl_ops = { + .set_state = ocelot_pinctrl_set_state, +}; + +/* ----- probe ----- */ + +static const struct regmap_config ocelot_pinctrl_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int ocelot_pinctrl_probe(struct device *dev) +{ + struct ocelot_pinctrl *info; + const struct ocelot_pinctrl_desc *desc; + struct resource *iores; + void __iomem *base; + int ret; + + desc = device_get_match_data(dev); + if (!desc) + return -EINVAL; + + info = xzalloc(sizeof(*info)); + info->dev = dev; + info->desc = desc; + info->stride = 1 + (desc->npins - 1) / 32; + info->altm_stride = info->stride; + + iores = dev_request_mem_resource(dev, 0); + if (IS_ERR(iores)) { + ret = PTR_ERR(iores); + goto err_free; + } + base = IOMEM(iores->start); + + info->map = regmap_init_mmio(dev, base, &ocelot_pinctrl_regmap_config); + if (IS_ERR(info->map)) { + ret = PTR_ERR(info->map); + goto err_free; + } + + /* PINCFG resource (optional). */ + iores = dev_request_mem_resource(dev, 1); + if (!IS_ERR(iores)) { + void __iomem *pincfg_base = IOMEM(iores->start); + + info->pincfg = regmap_init_mmio(dev, pincfg_base, + &ocelot_pinctrl_regmap_config); + if (IS_ERR(info->pincfg)) + info->pincfg = NULL; + } + + info->pctl.dev = dev; + info->pctl.ops = &ocelot_pinctrl_ops; + info->pctl.base = 0; + info->pctl.npins = desc->npins; + ret = pinctrl_register(&info->pctl); + if (ret) { + dev_err(dev, "failed to register pinctrl: %d\n", ret); + goto err_free; + } + + info->gpio_chip.dev = dev; + info->gpio_chip.base = -1; + info->gpio_chip.ngpio = desc->npins; + info->gpio_chip.ops = &ocelot_gpio_ops; + ret = gpiochip_add(&info->gpio_chip); + if (ret) { + dev_err(dev, "failed to register gpio chip: %d\n", ret); + pinctrl_unregister(&info->pctl); + goto err_free; + } + + dev_info(dev, "%s registered: %u pins\n", desc->name, desc->npins); + return 0; + +err_free: + free(info); + return ret; +} + +static const struct of_device_id ocelot_pinctrl_of_match[] = { + { .compatible = "microchip,lan9691-pinctrl", .data = &lan969x_desc }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ocelot_pinctrl_of_match); + +static struct driver ocelot_pinctrl_driver = { + .name = "ocelot-pinctrl", + .probe = ocelot_pinctrl_probe, + .of_compatible = DRV_OF_COMPAT(ocelot_pinctrl_of_match), +}; +coredevice_platform_driver(ocelot_pinctrl_driver); -- 2.47.3
