Quelle  intel-lpss-acpi.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Intel LPSS ACPI support.
 *
 * Copyright (C) 2015, Intel Corporation
 *
 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 *          Mika Westerberg <mika.westerberg@linux.intel.com>
 */

#include <linux/device.h>
#include <linux/gfp_types.h>
#include <linux/ioport.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/platform_device.h>
#include <linux/property.h>

#include <linux/pxa2xx_ssp.h>

#include <asm/errno.h>

#include "intel-lpss.h"

static const struct property_entry spt_spi_properties[] = {
 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
 { }
};

static const struct software_node spt_spi_node = {
 .properties = spt_spi_properties,
};

static const struct intel_lpss_platform_info spt_info = {
 .clk_rate = 120000000,
 .swnode = &spt_spi_node,
};

static const struct property_entry spt_i2c_properties[] = {
 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
 { },
};

static const struct software_node spt_i2c_node = {
 .properties = spt_i2c_properties,
};

static const struct intel_lpss_platform_info spt_i2c_info = {
 .clk_rate = 120000000,
 .swnode = &spt_i2c_node,
};

static const struct property_entry uart_properties[] = {
 PROPERTY_ENTRY_U32("reg-io-width", 4),
 PROPERTY_ENTRY_U32("reg-shift", 2),
 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
 { },
};

static const struct software_node uart_node = {
 .properties = uart_properties,
};

static const struct intel_lpss_platform_info spt_uart_info = {
 .clk_rate = 120000000,
 .clk_con_id = "baudclk",
 .swnode = &uart_node,
};

static const struct property_entry bxt_spi_properties[] = {
 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
 { }
};

static const struct software_node bxt_spi_node = {
 .properties = bxt_spi_properties,
};

static const struct intel_lpss_platform_info bxt_info = {
 .clk_rate = 100000000,
 .swnode = &bxt_spi_node,
};

static const 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 software_node bxt_i2c_node = {
 .properties = bxt_i2c_properties,
};

static const struct intel_lpss_platform_info bxt_i2c_info = {
 .clk_rate = 133000000,
 .swnode = &bxt_i2c_node,
};

static const 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 software_node apl_i2c_node = {
 .properties = apl_i2c_properties,
};

static const struct intel_lpss_platform_info apl_i2c_info = {
 .clk_rate = 133000000,
 .swnode = &apl_i2c_node,
};

static const struct property_entry cnl_spi_properties[] = {
 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
 { }
};

static const struct software_node cnl_spi_node = {
 .properties = cnl_spi_properties,
};

static const struct intel_lpss_platform_info cnl_info = {
 .clk_rate = 120000000,
 .swnode = &cnl_spi_node,
};

static const struct intel_lpss_platform_info cnl_i2c_info = {
 .clk_rate = 216000000,
 .swnode = &spt_i2c_node,
};

static const struct acpi_device_id intel_lpss_acpi_ids[] = {
 /* SPT */
 { "INT3440", (kernel_ulong_t)&spt_info },
 { "INT3441", (kernel_ulong_t)&spt_info },
 { "INT3442", (kernel_ulong_t)&spt_i2c_info },
 { "INT3443", (kernel_ulong_t)&spt_i2c_info },
 { "INT3444", (kernel_ulong_t)&spt_i2c_info },
 { "INT3445", (kernel_ulong_t)&spt_i2c_info },
 { "INT3446", (kernel_ulong_t)&spt_i2c_info },
 { "INT3447", (kernel_ulong_t)&spt_i2c_info },
 { "INT3448", (kernel_ulong_t)&spt_uart_info },
 { "INT3449", (kernel_ulong_t)&spt_uart_info },
 { "INT344A", (kernel_ulong_t)&spt_uart_info },
 /* CNL */
 { "INT34B0", (kernel_ulong_t)&cnl_info },
 { "INT34B1", (kernel_ulong_t)&cnl_info },
 { "INT34B2", (kernel_ulong_t)&cnl_i2c_info },
 { "INT34B3", (kernel_ulong_t)&cnl_i2c_info },
 { "INT34B4", (kernel_ulong_t)&cnl_i2c_info },
 { "INT34B5", (kernel_ulong_t)&cnl_i2c_info },
 { "INT34B6", (kernel_ulong_t)&cnl_i2c_info },
 { "INT34B7", (kernel_ulong_t)&cnl_i2c_info },
 { "INT34B8", (kernel_ulong_t)&spt_uart_info },
 { "INT34B9", (kernel_ulong_t)&spt_uart_info },
 { "INT34BA", (kernel_ulong_t)&spt_uart_info },
 { "INT34BC", (kernel_ulong_t)&cnl_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)
{
 const struct intel_lpss_platform_info *data;
 struct intel_lpss_platform_info *info;
 int ret;

 data = device_get_match_data(&pdev->dev);
 if (!data)
  return -ENODEV;

 info = devm_kmemdup(&pdev->dev, data, sizeof(*info), GFP_KERNEL);
 if (!info)
  return -ENOMEM;

 /* No need to check mem and irq here as intel_lpss_probe() does it for us */
 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 void intel_lpss_acpi_remove(struct platform_device *pdev)
{
 intel_lpss_remove(&pdev->dev);
 pm_runtime_disable(&pdev->dev);
}

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 = pm_ptr(&intel_lpss_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");
MODULE_IMPORT_NS("INTEL_LPSS");