projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| c558e39e AS |
1 | /* |
| 2 | * Intel Low Power Subsystem PWM controller driver | |
| 3 | * | |
| 4 | * Copyright (C) 2014, Intel Corporation | |
| 5 | * | |
| 6 | * Derived from the original pwm-lpss.c | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/acpi.h> | |
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/module.h> | |
| 16 | #include <linux/platform_device.h> | |
| f080be27 | 17 | #include <linux/pm_runtime.h> |
| c558e39e AS |
18 | |
| 19 | #include "pwm-lpss.h" | |
| 20 | ||
| 9900073c AS |
21 | /* BayTrail */ |
| 22 | static const struct pwm_lpss_boardinfo pwm_lpss_byt_info = { | |
| 23 | .clk_rate = 25000000, | |
| 24 | .npwm = 1, | |
| 25 | .base_unit_bits = 16, | |
| 26 | }; | |
| 27 | ||
| 28 | /* Braswell */ | |
| 29 | static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = { | |
| 30 | .clk_rate = 19200000, | |
| 31 | .npwm = 1, | |
| 32 | .base_unit_bits = 16, | |
| 33 | }; | |
| 34 | ||
| 35 | /* Broxton */ | |
| 36 | static const struct pwm_lpss_boardinfo pwm_lpss_bxt_info = { | |
| 37 | .clk_rate = 19200000, | |
| 38 | .npwm = 4, | |
| 39 | .base_unit_bits = 22, | |
| b997e3ed | 40 | .bypass = true, |
| 9900073c AS |
41 | }; |
| 42 | ||
| c558e39e AS |
43 | static int pwm_lpss_probe_platform(struct platform_device *pdev) |
| 44 | { | |
| 45 | const struct pwm_lpss_boardinfo *info; | |
| 46 | const struct acpi_device_id *id; | |
| 47 | struct pwm_lpss_chip *lpwm; | |
| 48 | struct resource *r; | |
| 49 | ||
| 50 | id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); | |
| 51 | if (!id) | |
| 52 | return -ENODEV; | |
| 53 | ||
| 54 | info = (const struct pwm_lpss_boardinfo *)id->driver_data; | |
| 55 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 56 | ||
| 57 | lpwm = pwm_lpss_probe(&pdev->dev, r, info); | |
| 58 | if (IS_ERR(lpwm)) | |
| 59 | return PTR_ERR(lpwm); | |
| 60 | ||
| 61 | platform_set_drvdata(pdev, lpwm); | |
| f080be27 QZ |
62 | |
| 63 | pm_runtime_set_active(&pdev->dev); | |
| 64 | pm_runtime_enable(&pdev->dev); | |
| 65 | ||
| c558e39e AS |
66 | return 0; |
| 67 | } | |
| 68 | ||
| 69 | static int pwm_lpss_remove_platform(struct platform_device *pdev) | |
| 70 | { | |
| 71 | struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev); | |
| 72 | ||
| f080be27 | 73 | pm_runtime_disable(&pdev->dev); |
| c558e39e AS |
74 | return pwm_lpss_remove(lpwm); |
| 75 | } | |
| 76 | ||
| 77 | static const struct acpi_device_id pwm_lpss_acpi_match[] = { | |
| 78 | { "80860F09", (unsigned long)&pwm_lpss_byt_info }, | |
| 79 | { "80862288", (unsigned long)&pwm_lpss_bsw_info }, | |
| 03f00e53 | 80 | { "80865AC8", (unsigned long)&pwm_lpss_bxt_info }, |
| c558e39e AS |
81 | { }, |
| 82 | }; | |
| 83 | MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match); | |
| 84 | ||
| 85 | static struct platform_driver pwm_lpss_driver_platform = { | |
| 86 | .driver = { | |
| 87 | .name = "pwm-lpss", | |
| 88 | .acpi_match_table = pwm_lpss_acpi_match, | |
| 89 | }, | |
| 90 | .probe = pwm_lpss_probe_platform, | |
| 91 | .remove = pwm_lpss_remove_platform, | |
| 92 | }; | |
| 93 | module_platform_driver(pwm_lpss_driver_platform); | |
| 94 | ||
| 95 | MODULE_DESCRIPTION("PWM platform driver for Intel LPSS"); | |
| 96 | MODULE_LICENSE("GPL v2"); | |
| 97 | MODULE_ALIAS("platform:pwm-lpss"); |