^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) * Intel Low Power Subsystem PWM controller driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014, Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Derived from the original pwm-lpss.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^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/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "pwm-lpss.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /* BayTrail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) .clk_rate = 25000000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) .npwm = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) .base_unit_bits = 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* Braswell */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) .clk_rate = 19200000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .npwm = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .base_unit_bits = 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .other_devices_aml_touches_pwm_regs = true,
^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) /* Broxton */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .clk_rate = 19200000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .npwm = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .base_unit_bits = 22,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .bypass = true,
^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) static int pwm_lpss_probe_platform(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) const struct pwm_lpss_boardinfo *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) const struct acpi_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct pwm_lpss_chip *lpwm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct resource *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (!id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) info = (const struct pwm_lpss_boardinfo *)id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) lpwm = pwm_lpss_probe(&pdev->dev, r, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (IS_ERR(lpwm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return PTR_ERR(lpwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) platform_set_drvdata(pdev, lpwm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_SMART_PREPARE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) pm_runtime_set_active(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) pm_runtime_enable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int pwm_lpss_remove_platform(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) pm_runtime_disable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return pwm_lpss_remove(lpwm);
^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 pwm_lpss_prepare(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct pwm_lpss_chip *lpwm = dev_get_drvdata(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) * If other device's AML code touches the PWM regs on suspend/resume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * force runtime-resume the PWM controller to allow this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (lpwm->info->other_devices_aml_touches_pwm_regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return 0; /* Force runtime-resume */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return 1; /* If runtime-suspended leave as is */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static const struct dev_pm_ops pwm_lpss_platform_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .prepare = pwm_lpss_prepare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static const struct acpi_device_id pwm_lpss_acpi_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) { "80860F09", (unsigned long)&pwm_lpss_byt_info },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) { "80862288", (unsigned long)&pwm_lpss_bsw_info },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) { "80862289", (unsigned long)&pwm_lpss_bsw_info },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) { "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
^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) MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static struct platform_driver pwm_lpss_driver_platform = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .name = "pwm-lpss",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .acpi_match_table = pwm_lpss_acpi_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .pm = &pwm_lpss_platform_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .probe = pwm_lpss_probe_platform,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .remove = pwm_lpss_remove_platform,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) module_platform_driver(pwm_lpss_driver_platform);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) MODULE_DESCRIPTION("PWM platform driver for Intel LPSS");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) MODULE_ALIAS("platform:pwm-lpss");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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