^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) // Copyright (c) 2017-18 Linaro Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/of_platform.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/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/reboot-mode.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define PON_SOFT_RB_SPARE 0x8f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define GEN1_REASON_SHIFT 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define GEN2_REASON_SHIFT 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct pm8916_pon {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u32 baseaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct reboot_mode_driver reboot_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) long reason_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static int pm8916_reboot_mode_write(struct reboot_mode_driver *reboot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) unsigned int magic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct pm8916_pon *pon = container_of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) (reboot, struct pm8916_pon, reboot_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) ret = regmap_update_bits(pon->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) pon->baseaddr + PON_SOFT_RB_SPARE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) GENMASK(7, pon->reason_shift),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) magic << pon->reason_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) dev_err(pon->dev, "update reboot mode bits failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return ret;
^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) static int pm8916_pon_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct pm8916_pon *pon;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) pon = devm_kzalloc(&pdev->dev, sizeof(*pon), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (!pon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) pon->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) pon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!pon->regmap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) dev_err(&pdev->dev, "failed to locate regmap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return -ENODEV;
^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) error = of_property_read_u32(pdev->dev.of_node, "reg",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) &pon->baseaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) pon->reboot_mode.dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) pon->reason_shift = (long)of_device_get_match_data(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) pon->reboot_mode.write = pm8916_reboot_mode_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) error = devm_reboot_mode_register(&pdev->dev, &pon->reboot_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) dev_err(&pdev->dev, "can't register reboot mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return error;
^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) platform_set_drvdata(pdev, pon);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return devm_of_platform_populate(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static const struct of_device_id pm8916_pon_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) { .compatible = "qcom,pm8916-pon", .data = (void *)GEN1_REASON_SHIFT },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) { .compatible = "qcom,pms405-pon", .data = (void *)GEN1_REASON_SHIFT },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) { .compatible = "qcom,pm8998-pon", .data = (void *)GEN2_REASON_SHIFT },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) MODULE_DEVICE_TABLE(of, pm8916_pon_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static struct platform_driver pm8916_pon_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .probe = pm8916_pon_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .name = "pm8916-pon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .of_match_table = of_match_ptr(pm8916_pon_id_table),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) module_platform_driver(pm8916_pon_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) MODULE_DESCRIPTION("pm8916 Power On driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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