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> 17 18 #include "pwm-lpss.h" 19 20 static int pwm_lpss_probe_platform(struct platform_device *pdev) 21 { 22 const struct pwm_lpss_boardinfo *info; 23 const struct acpi_device_id *id; 24 struct pwm_lpss_chip *lpwm; 25 struct resource *r; 26 27 id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); 28 if (!id) 29 return -ENODEV; 30 31 info = (const struct pwm_lpss_boardinfo *)id->driver_data; 32 r = platform_get_resource(pdev, IORESOURCE_MEM, 0); 33 34 lpwm = pwm_lpss_probe(&pdev->dev, r, info); 35 if (IS_ERR(lpwm)) 36 return PTR_ERR(lpwm); 37 38 platform_set_drvdata(pdev, lpwm); 39 return 0; 40 } 41 42 static int pwm_lpss_remove_platform(struct platform_device *pdev) 43 { 44 struct pwm_lpss_chip *lpwm = platform_get_drvdata(pdev); 45 46 return pwm_lpss_remove(lpwm); 47 } 48 49 static const struct acpi_device_id pwm_lpss_acpi_match[] = { 50 { "80860F09", (unsigned long)&pwm_lpss_byt_info }, 51 { "80862288", (unsigned long)&pwm_lpss_bsw_info }, 52 { "80865AC8", (unsigned long)&pwm_lpss_bxt_info }, 53 { }, 54 }; 55 MODULE_DEVICE_TABLE(acpi, pwm_lpss_acpi_match); 56 57 static struct platform_driver pwm_lpss_driver_platform = { 58 .driver = { 59 .name = "pwm-lpss", 60 .acpi_match_table = pwm_lpss_acpi_match, 61 }, 62 .probe = pwm_lpss_probe_platform, 63 .remove = pwm_lpss_remove_platform, 64 }; 65 module_platform_driver(pwm_lpss_driver_platform); 66 67 MODULE_DESCRIPTION("PWM platform driver for Intel LPSS"); 68 MODULE_LICENSE("GPL v2"); 69 MODULE_ALIAS("platform:pwm-lpss"); 70