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- --- a/drivers/misc/Makefile
- +++ b/drivers/misc/Makefile
- @@ -56,3 +56,4 @@ obj-$(CONFIG_GENWQE) += genwqe/
- obj-$(CONFIG_ECHO) += echo/
- obj-$(CONFIG_VEXPRESS_SYSCFG) += vexpress-syscfg.o
- obj-$(CONFIG_CXL_BASE) += cxl/
- +obj-$(CONFIG_SOC_MT7620) += linkit.o
- --- /dev/null
- +++ b/drivers/misc/linkit.c
- @@ -0,0 +1,84 @@
- +/*
- + * 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
- + * publishhed by the Free Software Foundation.
- + *
- + * Copyright (C) 2015 John Crispin <blogic@openwrt.org>
- + */
- +
- +#include <linux/module.h>
- +#include <linux/platform_device.h>
- +#include <linux/of.h>
- +#include <linux/mtd/mtd.h>
- +#include <linux/gpio.h>
- +
- +#define LINKIT_LATCH_GPIO 11
- +
- +struct linkit_hw_data {
- + char board[16];
- + char rev[16];
- +};
- +
- +static void sanify_string(char *s)
- +{
- + int i;
- +
- + for (i = 0; i < 15; i++)
- + if (s[i] <= 0x20)
- + s[i] = '\0';
- + s[15] = '\0';
- +}
- +
- +static int linkit_probe(struct platform_device *pdev)
- +{
- + struct linkit_hw_data hw;
- + struct mtd_info *mtd;
- + size_t retlen;
- + int ret;
- +
- + mtd = get_mtd_device_nm("factory");
- + if (IS_ERR(mtd))
- + return PTR_ERR(mtd);
- +
- + ret = mtd_read(mtd, 0x400, sizeof(hw), &retlen, (u_char *) &hw);
- + put_mtd_device(mtd);
- +
- + sanify_string(hw.board);
- + sanify_string(hw.rev);
- +
- + dev_info(&pdev->dev, "Version : %s\n", hw.board);
- + dev_info(&pdev->dev, "Revision : %s\n", hw.rev);
- +
- + if (!strcmp(hw.board, "LINKITS7688")) {
- + dev_info(&pdev->dev, "setting up bootstrap latch\n");
- +
- + if (devm_gpio_request(&pdev->dev, LINKIT_LATCH_GPIO, "bootstrap")) {
- + dev_err(&pdev->dev, "failed to setup bootstrap gpio\n");
- + return -1;
- + }
- + gpio_direction_output(LINKIT_LATCH_GPIO, 0);
- + }
- +
- + return 0;
- +}
- +
- +static const struct of_device_id linkit_match[] = {
- + { .compatible = "mediatek,linkit" },
- + {},
- +};
- +MODULE_DEVICE_TABLE(of, linkit_match);
- +
- +static struct platform_driver linkit_driver = {
- + .probe = linkit_probe,
- + .driver = {
- + .name = "mtk-linkit",
- + .owner = THIS_MODULE,
- + .of_match_table = linkit_match,
- + },
- +};
- +
- +int __init linkit_init(void)
- +{
- + return platform_driver_register(&linkit_driver);
- +}
- +late_initcall_sync(linkit_init);
|
