72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Copyright (C) 2012 John Crispin <john@phrozen.org>
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*/
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/gpio/consumer.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <lantiq_soc.h>
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static unsigned int *cp1_base;
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unsigned int *ltq_get_cp1_base(void)
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{
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if (!cp1_base)
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panic("no cp1 base was set\n");
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return cp1_base;
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}
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EXPORT_SYMBOL(ltq_get_cp1_base);
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static int vmmc_probe(struct platform_device *pdev)
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{
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#define CP1_SIZE (1 << 20)
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struct gpio_desc *gpio;
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int gpio_count;
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dma_addr_t dma;
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int error;
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cp1_base =
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(void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
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&dma, GFP_KERNEL));
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gpio_count = gpiod_count(&pdev->dev, NULL);
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while (gpio_count > 0) {
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gpio = devm_gpiod_get_index(&pdev->dev,
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NULL, --gpio_count, GPIOD_OUT_HIGH);
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error = PTR_ERR_OR_ZERO(gpio);
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if (error) {
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dev_err(&pdev->dev,
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"failed to request GPIO idx %d: %d\n",
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gpio_count, error);
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continue;
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}
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gpiod_set_consumer_name(gpio, "vmmc-relay");
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}
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dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
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return 0;
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}
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static const struct of_device_id vmmc_match[] = {
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{ .compatible = "lantiq,vmmc-xway" },
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{},
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};
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static struct platform_driver vmmc_driver = {
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.probe = vmmc_probe,
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.driver = {
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.name = "lantiq,vmmc",
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.of_match_table = vmmc_match,
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},
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};
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builtin_platform_driver(vmmc_driver);
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