^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * MEN 14F021P00 Board Management Controller (BMC) LEDs Driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This is the core LED driver of the MEN 14F021P00 BMC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * There are four LEDs available which can be switched on and off.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * STATUS LED, HOT SWAP LED, USER LED 1, USER LED 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (C) 2014 MEN Mikro Elektronik Nuernberg GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define BMC_CMD_LED_GET_SET 0xA0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define BMC_BIT_LED_STATUS BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define BMC_BIT_LED_HOTSWAP BIT(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define BMC_BIT_LED_USER1 BIT(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define BMC_BIT_LED_USER2 BIT(3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct menf21bmc_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u8 led_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct i2c_client *i2c_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct menf21bmc_led leds[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .name = "menf21bmc:led_status",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .led_bit = BMC_BIT_LED_STATUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .name = "menf21bmc:led_hotswap",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .led_bit = BMC_BIT_LED_HOTSWAP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .name = "menf21bmc:led_user1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .led_bit = BMC_BIT_LED_USER1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .name = "menf21bmc:led_user2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .led_bit = BMC_BIT_LED_USER2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static DEFINE_MUTEX(led_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) menf21bmc_led_set(struct led_classdev *led_cdev, enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int led_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct menf21bmc_led *led = container_of(led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct menf21bmc_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) mutex_lock(&led_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) led_val = i2c_smbus_read_byte_data(led->i2c_client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) BMC_CMD_LED_GET_SET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (led_val < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) goto err_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (value == LED_OFF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) led_val &= ~led->led_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) led_val |= led->led_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) i2c_smbus_write_byte_data(led->i2c_client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) BMC_CMD_LED_GET_SET, led_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) err_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) mutex_unlock(&led_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static int menf21bmc_led_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct i2c_client *i2c_client = to_i2c_client(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) for (i = 0; i < ARRAY_SIZE(leds); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) leds[i].cdev.name = leds[i].name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) leds[i].cdev.brightness_set = menf21bmc_led_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) leds[i].i2c_client = i2c_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ret = devm_led_classdev_register(&pdev->dev, &leds[i].cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dev_err(&pdev->dev, "failed to register LED device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev_info(&pdev->dev, "MEN 140F21P00 BMC LED device enabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static struct platform_driver menf21bmc_led = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .probe = menf21bmc_led_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .name = "menf21bmc_led",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) module_platform_driver(menf21bmc_led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) MODULE_DESCRIPTION("MEN 14F021P00 BMC led driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) MODULE_ALIAS("platform:menf21bmc_led");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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