// SPDX-License-Identifier: GPL-2.0+ /* * Support for EC-connected GPIOs for identify * LED/button on Barco P50 board * * Copyright (C) 2021 Barco NV * Author: Santosh Kumar Yadav <[email protected]> */ #define pr_fmt(fmt) … #include <linux/delay.h> #include <linux/dmi.h> #include <linux/err.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/gpio_keys.h> #include <linux/gpio/driver.h> #include <linux/gpio/machine.h> #include <linux/input.h> #define DRIVER_NAME … /* GPIO lines */ #define P50_GPIO_LINE_LED … #define P50_GPIO_LINE_BTN … /* GPIO IO Ports */ #define P50_GPIO_IO_PORT_BASE … #define P50_PORT_DATA … #define P50_PORT_CMD … #define P50_STATUS_OBF … #define P50_STATUS_IBF … #define P50_CMD_READ … #define P50_CMD_WRITE … /* EC mailbox registers */ #define P50_MBOX_REG_CMD … #define P50_MBOX_REG_STATUS … #define P50_MBOX_REG_PARAM … #define P50_MBOX_REG_DATA … #define P50_MBOX_CMD_READ_GPIO … #define P50_MBOX_CMD_WRITE_GPIO … #define P50_MBOX_CMD_CLEAR … #define P50_MBOX_STATUS_SUCCESS … #define P50_MBOX_PARAM_LED … #define P50_MBOX_PARAM_BTN … struct p50_gpio { … }; static struct platform_device *gpio_pdev; static int gpio_params[] = …; static const char * const gpio_names[] = …; static struct gpiod_lookup_table p50_gpio_led_table = …; /* GPIO LEDs */ static struct gpio_led leds[] = …; static struct gpio_led_platform_data leds_pdata = …; /* GPIO keyboard */ static struct gpio_keys_button buttons[] = …; static struct gpio_keys_platform_data keys_pdata = …; /* low level access routines */ static int p50_wait_ec(struct p50_gpio *p50, int mask, int expected) { … } static int p50_read_mbox_reg(struct p50_gpio *p50, int reg) { … } static int p50_write_mbox_reg(struct p50_gpio *p50, int reg, int val) { … } /* mbox routines */ static int p50_wait_mbox_idle(struct p50_gpio *p50) { … } static int p50_send_mbox_cmd(struct p50_gpio *p50, int cmd, int param, int data) { … } /* gpio routines */ static int p50_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) { … } static int p50_gpio_get(struct gpio_chip *gc, unsigned int offset) { … } static void p50_gpio_set(struct gpio_chip *gc, unsigned int offset, int value) { … } static int p50_gpio_probe(struct platform_device *pdev) { … } static void p50_gpio_remove(struct platform_device *pdev) { … } static struct platform_driver p50_gpio_driver = …; /* Board setup */ static const struct dmi_system_id dmi_ids[] __initconst = …; MODULE_DEVICE_TABLE(dmi, dmi_ids); static int __init p50_module_init(void) { … } static void __exit p50_module_exit(void) { … } module_init(…) …; module_exit(p50_module_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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