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![Andy Shevchenko](/assets/img/avatar_default.png)
The SPI driver wants to know the exact type of the controller. Provide this information to it, hence it allows to fix the Intel Cannon Lake and others in the future. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20220301205056.79810-1-andriy.shevchenko@linux.intel.com
223 lines
5.9 KiB
C
223 lines
5.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Intel LPSS ACPI support.
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*
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* Copyright (C) 2015, Intel Corporation
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*
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* Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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* Mika Westerberg <mika.westerberg@linux.intel.com>
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*/
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#include <linux/acpi.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pm_runtime.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include <linux/pxa2xx_ssp.h>
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#include "intel-lpss.h"
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static const struct property_entry spt_spi_properties[] = {
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PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
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{ }
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};
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static const struct software_node spt_spi_node = {
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.properties = spt_spi_properties,
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};
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static const struct intel_lpss_platform_info spt_info = {
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.clk_rate = 120000000,
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.swnode = &spt_spi_node,
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};
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static const struct property_entry spt_i2c_properties[] = {
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PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
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{ },
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};
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static const struct software_node spt_i2c_node = {
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.properties = spt_i2c_properties,
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};
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static const struct intel_lpss_platform_info spt_i2c_info = {
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.clk_rate = 120000000,
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.swnode = &spt_i2c_node,
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};
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static const struct property_entry uart_properties[] = {
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PROPERTY_ENTRY_U32("reg-io-width", 4),
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PROPERTY_ENTRY_U32("reg-shift", 2),
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PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
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{ },
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};
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static const struct software_node uart_node = {
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.properties = uart_properties,
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};
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static const struct intel_lpss_platform_info spt_uart_info = {
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.clk_rate = 120000000,
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.clk_con_id = "baudclk",
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.swnode = &uart_node,
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};
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static const struct property_entry bxt_spi_properties[] = {
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PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
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{ }
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};
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static const struct software_node bxt_spi_node = {
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.properties = bxt_spi_properties,
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};
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static const struct intel_lpss_platform_info bxt_info = {
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.clk_rate = 100000000,
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.swnode = &bxt_spi_node,
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};
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static const struct property_entry bxt_i2c_properties[] = {
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PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
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PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
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PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
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{ },
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};
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static const struct software_node bxt_i2c_node = {
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.properties = bxt_i2c_properties,
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};
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static const struct intel_lpss_platform_info bxt_i2c_info = {
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.clk_rate = 133000000,
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.swnode = &bxt_i2c_node,
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};
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static const struct property_entry apl_i2c_properties[] = {
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PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
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PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
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PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
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{ },
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};
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static const struct software_node apl_i2c_node = {
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.properties = apl_i2c_properties,
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};
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static const struct intel_lpss_platform_info apl_i2c_info = {
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.clk_rate = 133000000,
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.swnode = &apl_i2c_node,
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};
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static const struct property_entry cnl_spi_properties[] = {
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PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
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{ }
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};
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static const struct software_node cnl_spi_node = {
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.properties = cnl_spi_properties,
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};
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static const struct intel_lpss_platform_info cnl_info = {
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.clk_rate = 120000000,
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.swnode = &cnl_spi_node,
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};
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static const struct intel_lpss_platform_info cnl_i2c_info = {
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.clk_rate = 216000000,
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.swnode = &spt_i2c_node,
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};
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static const struct acpi_device_id intel_lpss_acpi_ids[] = {
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/* SPT */
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{ "INT3440", (kernel_ulong_t)&spt_info },
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{ "INT3441", (kernel_ulong_t)&spt_info },
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{ "INT3442", (kernel_ulong_t)&spt_i2c_info },
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{ "INT3443", (kernel_ulong_t)&spt_i2c_info },
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{ "INT3444", (kernel_ulong_t)&spt_i2c_info },
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{ "INT3445", (kernel_ulong_t)&spt_i2c_info },
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{ "INT3446", (kernel_ulong_t)&spt_i2c_info },
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{ "INT3447", (kernel_ulong_t)&spt_i2c_info },
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{ "INT3448", (kernel_ulong_t)&spt_uart_info },
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{ "INT3449", (kernel_ulong_t)&spt_uart_info },
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{ "INT344A", (kernel_ulong_t)&spt_uart_info },
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/* CNL */
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{ "INT34B0", (kernel_ulong_t)&cnl_info },
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{ "INT34B1", (kernel_ulong_t)&cnl_info },
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{ "INT34B2", (kernel_ulong_t)&cnl_i2c_info },
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{ "INT34B3", (kernel_ulong_t)&cnl_i2c_info },
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{ "INT34B4", (kernel_ulong_t)&cnl_i2c_info },
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{ "INT34B5", (kernel_ulong_t)&cnl_i2c_info },
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{ "INT34B6", (kernel_ulong_t)&cnl_i2c_info },
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{ "INT34B7", (kernel_ulong_t)&cnl_i2c_info },
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{ "INT34B8", (kernel_ulong_t)&spt_uart_info },
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{ "INT34B9", (kernel_ulong_t)&spt_uart_info },
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{ "INT34BA", (kernel_ulong_t)&spt_uart_info },
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{ "INT34BC", (kernel_ulong_t)&cnl_info },
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/* BXT */
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{ "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
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{ "80860ABC", (kernel_ulong_t)&bxt_info },
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{ "80860AC2", (kernel_ulong_t)&bxt_info },
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/* APL */
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{ "80865AAC", (kernel_ulong_t)&apl_i2c_info },
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{ "80865ABC", (kernel_ulong_t)&bxt_info },
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{ "80865AC2", (kernel_ulong_t)&bxt_info },
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{ }
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};
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MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
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static int intel_lpss_acpi_probe(struct platform_device *pdev)
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{
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struct intel_lpss_platform_info *info;
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const struct acpi_device_id *id;
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int ret;
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id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
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if (!id)
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return -ENODEV;
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info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
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GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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info->irq = platform_get_irq(pdev, 0);
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ret = intel_lpss_probe(&pdev->dev, info);
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if (ret)
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return ret;
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pm_runtime_set_active(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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return 0;
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}
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static int intel_lpss_acpi_remove(struct platform_device *pdev)
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{
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intel_lpss_remove(&pdev->dev);
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pm_runtime_disable(&pdev->dev);
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return 0;
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}
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static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
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static struct platform_driver intel_lpss_acpi_driver = {
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.probe = intel_lpss_acpi_probe,
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.remove = intel_lpss_acpi_remove,
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.driver = {
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.name = "intel-lpss",
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.acpi_match_table = intel_lpss_acpi_ids,
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.pm = &intel_lpss_acpi_pm_ops,
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},
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};
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module_platform_driver(intel_lpss_acpi_driver);
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MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
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MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
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MODULE_DESCRIPTION("Intel LPSS ACPI driver");
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MODULE_LICENSE("GPL v2");
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