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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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8afda8b26d
Add support for the SPI serial flash host controller found on many Intel CPUs including Baytrail and Braswell. The SPI serial flash controller is used to access BIOS and other platform specific information. By default the driver exposes a single read-only MTD device but with a module parameter "writeable=1" the MTD device can be made read-write which makes it possible to upgrade BIOS directly from Linux. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/*
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* Intel PCH/PCU SPI flash platform driver.
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*
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* Copyright (C) 2016, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include "intel-spi.h"
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static int intel_spi_platform_probe(struct platform_device *pdev)
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{
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struct intel_spi_boardinfo *info;
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struct intel_spi *ispi;
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struct resource *mem;
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info = dev_get_platdata(&pdev->dev);
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if (!info)
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return -EINVAL;
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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ispi = intel_spi_probe(&pdev->dev, mem, info);
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if (IS_ERR(ispi))
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return PTR_ERR(ispi);
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platform_set_drvdata(pdev, ispi);
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return 0;
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}
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static int intel_spi_platform_remove(struct platform_device *pdev)
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{
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struct intel_spi *ispi = platform_get_drvdata(pdev);
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return intel_spi_remove(ispi);
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}
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static struct platform_driver intel_spi_platform_driver = {
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.probe = intel_spi_platform_probe,
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.remove = intel_spi_platform_remove,
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.driver = {
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.name = "intel-spi",
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},
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};
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module_platform_driver(intel_spi_platform_driver);
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MODULE_DESCRIPTION("Intel PCH/PCU SPI flash platform driver");
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MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:intel-spi");
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