^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define A500_EC_LED_DELAY_USEC (100 * 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) REG_RESET_LEDS = 0x40,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) REG_POWER_LED_ON = 0x42,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) REG_CHARGE_LED_ON = 0x43,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) REG_ANDROID_LEDS_OFF = 0x5a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct a500_led {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct led_classdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) const struct reg_sequence *enable_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct a500_led *other;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct regmap *rmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static const struct reg_sequence a500_ec_leds_reset_seq[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) REG_SEQ(REG_RESET_LEDS, 0x0, A500_EC_LED_DELAY_USEC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) REG_SEQ(REG_ANDROID_LEDS_OFF, 0x0, A500_EC_LED_DELAY_USEC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static const struct reg_sequence a500_ec_white_led_enable_seq[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) REG_SEQ(REG_POWER_LED_ON, 0x0, A500_EC_LED_DELAY_USEC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static const struct reg_sequence a500_ec_orange_led_enable_seq[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) REG_SEQ(REG_CHARGE_LED_ON, 0x0, A500_EC_LED_DELAY_USEC),
^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) static int a500_ec_led_brightness_set(struct led_classdev *led_cdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) enum led_brightness value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct a500_led *led = container_of(led_cdev, struct a500_led, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct reg_sequence control_seq[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned int num_regs = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) control_seq[0] = led->enable_seq[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * There is no separate controls which can disable LEDs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * individually, there is only RESET_LEDS command that turns
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * off both LEDs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * RESET_LEDS turns off both LEDs, thus restore other LED if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * it's turned ON.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (led->other->cdev.brightness)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) num_regs = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) control_seq[0] = a500_ec_leds_reset_seq[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) control_seq[1] = led->other->enable_seq[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return regmap_multi_reg_write(led->rmap, control_seq, num_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int a500_ec_leds_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct a500_led *white_led, *orange_led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct regmap *rmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) rmap = dev_get_regmap(pdev->dev.parent, "KB930");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (!rmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* reset and turn off LEDs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) regmap_multi_reg_write(rmap, a500_ec_leds_reset_seq, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) white_led = devm_kzalloc(&pdev->dev, sizeof(*white_led), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!white_led)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) white_led->cdev.name = "power:white";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) white_led->cdev.brightness_set_blocking = a500_ec_led_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) white_led->cdev.flags = LED_CORE_SUSPENDRESUME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) white_led->cdev.max_brightness = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) white_led->enable_seq = a500_ec_white_led_enable_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) white_led->rmap = rmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) orange_led = devm_kzalloc(&pdev->dev, sizeof(*orange_led), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (!orange_led)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) orange_led->cdev.name = "power:orange";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) orange_led->cdev.brightness_set_blocking = a500_ec_led_brightness_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) orange_led->cdev.flags = LED_CORE_SUSPENDRESUME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) orange_led->cdev.max_brightness = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) orange_led->enable_seq = a500_ec_orange_led_enable_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) orange_led->rmap = rmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) white_led->other = orange_led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) orange_led->other = white_led;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) err = devm_led_classdev_register(&pdev->dev, &white_led->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) dev_err(&pdev->dev, "failed to register white LED\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) err = devm_led_classdev_register(&pdev->dev, &orange_led->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) dev_err(&pdev->dev, "failed to register orange LED\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static struct platform_driver a500_ec_leds_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .name = "acer-a500-iconia-leds",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .probe = a500_ec_leds_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) module_platform_driver(a500_ec_leds_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) MODULE_DESCRIPTION("LED driver for Acer Iconia Tab A500 Power Button");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) MODULE_AUTHOR("Dmitry Osipenko <digetx@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) MODULE_ALIAS("platform:acer-a500-iconia-leds");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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