^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * h3xxx atmel micro companion support, notification LED subdevice
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author : Linus Walleij <linus.walleij@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mfd/ipaq-micro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define LED_YELLOW 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define LED_GREEN 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define LED_EN (1 << 4) /* LED ON/OFF 0:off, 1:on */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define LED_AUTOSTOP (1 << 5) /* LED ON/OFF auto stop set 0:disable, 1:enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define LED_ALWAYS (1 << 6) /* LED Interrupt Mask 0:No mask, 1:mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int micro_leds_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * In this message:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * Byte 0 = LED color: 0 = yellow, 1 = green
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * yellow LED is always ~30 blinks per minute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Byte 1 = duration (flags?) appears to be ignored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Byte 2 = green ontime in 1/10 sec (deciseconds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * 1 = 1/10 second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * 0 = 256/10 second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Byte 3 = green offtime in 1/10 sec (deciseconds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * 1 = 1/10 second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * 0 = 256/10 seconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct ipaq_micro_msg msg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .id = MSG_NOTIFY_LED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .tx_len = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) msg.tx_data[0] = LED_GREEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) msg.tx_data[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) msg.tx_data[2] = 0; /* Duty cycle 256 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) msg.tx_data[3] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) msg.tx_data[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) msg.tx_data[3] = 0; /* Duty cycle 256 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return ipaq_micro_tx_msg_sync(micro, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* Maximum duty cycle in ms 256/10 sec = 25600 ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define IPAQ_LED_MAX_DUTY 25600
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static int micro_leds_blink_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned long *delay_on,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned long *delay_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct ipaq_micro *micro = dev_get_drvdata(led_cdev->dev->parent->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * In this message:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Byte 0 = LED color: 0 = yellow, 1 = green
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * yellow LED is always ~30 blinks per minute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * Byte 1 = duration (flags?) appears to be ignored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * Byte 2 = green ontime in 1/10 sec (deciseconds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * 1 = 1/10 second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * 0 = 256/10 second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * Byte 3 = green offtime in 1/10 sec (deciseconds)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * 1 = 1/10 second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * 0 = 256/10 seconds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct ipaq_micro_msg msg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .id = MSG_NOTIFY_LED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .tx_len = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) msg.tx_data[0] = LED_GREEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (*delay_on > IPAQ_LED_MAX_DUTY ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) *delay_off > IPAQ_LED_MAX_DUTY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (*delay_on == 0 && *delay_off == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) *delay_on = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) *delay_off = 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) msg.tx_data[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (*delay_on >= IPAQ_LED_MAX_DUTY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) msg.tx_data[2] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) msg.tx_data[2] = (u8) DIV_ROUND_CLOSEST(*delay_on, 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (*delay_off >= IPAQ_LED_MAX_DUTY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) msg.tx_data[3] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) msg.tx_data[3] = (u8) DIV_ROUND_CLOSEST(*delay_off, 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return ipaq_micro_tx_msg_sync(micro, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static struct led_classdev micro_led = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .name = "led-ipaq-micro",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .brightness_set_blocking = micro_leds_brightness_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .blink_set = micro_leds_blink_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .flags = LED_CORE_SUSPENDRESUME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int micro_leds_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ret = devm_led_classdev_register(&pdev->dev, µ_led);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) dev_err(&pdev->dev, "registering led failed: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) dev_info(&pdev->dev, "iPAQ micro notification LED driver\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static struct platform_driver micro_leds_device_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .name = "ipaq-micro-leds",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .probe = micro_leds_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) module_platform_driver(micro_leds_device_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) MODULE_DESCRIPTION("driver for iPAQ Atmel micro leds");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) MODULE_ALIAS("platform:ipaq-micro-leds");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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