diff options
Diffstat (limited to 'drivers/mfd/intel-lpss-acpi.c')
| -rw-r--r-- | drivers/mfd/intel-lpss-acpi.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/mfd/intel-lpss-acpi.c b/drivers/mfd/intel-lpss-acpi.c new file mode 100644 index 000000000..fc44fb7c5 --- /dev/null +++ b/drivers/mfd/intel-lpss-acpi.c @@ -0,0 +1,132 @@ +/* + * Intel LPSS ACPI support. + * + * Copyright (C) 2015, Intel Corporation + * + * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com> + * Mika Westerberg <mika.westerberg@linux.intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/acpi.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/platform_device.h> +#include <linux/property.h> + +#include "intel-lpss.h" + +static struct property_entry spt_i2c_properties[] = { + PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230), + { }, +}; + +static const struct intel_lpss_platform_info spt_i2c_info = { + .clk_rate = 120000000, + .properties = spt_i2c_properties, +}; + +static const struct intel_lpss_platform_info bxt_info = { + .clk_rate = 100000000, +}; + +static struct property_entry bxt_i2c_properties[] = { + PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42), + PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), + PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), + { }, +}; + +static const struct intel_lpss_platform_info bxt_i2c_info = { + .clk_rate = 133000000, + .properties = bxt_i2c_properties, +}; + +static struct property_entry apl_i2c_properties[] = { + PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207), + PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171), + PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208), + { }, +}; + +static const struct intel_lpss_platform_info apl_i2c_info = { + .clk_rate = 133000000, + .properties = apl_i2c_properties, +}; + +static const struct acpi_device_id intel_lpss_acpi_ids[] = { + /* SPT */ + { "INT3446", (kernel_ulong_t)&spt_i2c_info }, + { "INT3447", (kernel_ulong_t)&spt_i2c_info }, + /* BXT */ + { "80860AAC", (kernel_ulong_t)&bxt_i2c_info }, + { "80860ABC", (kernel_ulong_t)&bxt_info }, + { "80860AC2", (kernel_ulong_t)&bxt_info }, + /* APL */ + { "80865AAC", (kernel_ulong_t)&apl_i2c_info }, + { "80865ABC", (kernel_ulong_t)&bxt_info }, + { "80865AC2", (kernel_ulong_t)&bxt_info }, + { } +}; +MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids); + +static int intel_lpss_acpi_probe(struct platform_device *pdev) +{ + struct intel_lpss_platform_info *info; + const struct acpi_device_id *id; + int ret; + + id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev); + if (!id) + return -ENODEV; + + info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + info->irq = platform_get_irq(pdev, 0); + + ret = intel_lpss_probe(&pdev->dev, info); + if (ret) + return ret; + + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + return 0; +} + +static int intel_lpss_acpi_remove(struct platform_device *pdev) +{ + intel_lpss_remove(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops); + +static struct platform_driver intel_lpss_acpi_driver = { + .probe = intel_lpss_acpi_probe, + .remove = intel_lpss_acpi_remove, + .driver = { + .name = "intel-lpss", + .acpi_match_table = intel_lpss_acpi_ids, + .pm = &intel_lpss_acpi_pm_ops, + }, +}; + +module_platform_driver(intel_lpss_acpi_driver); + +MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); +MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); +MODULE_DESCRIPTION("Intel LPSS ACPI driver"); +MODULE_LICENSE("GPL v2"); |