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Diffstat (limited to 'target/linux/ramips/patches-4.4/0200-linkit_bootstrap.patch')
-rw-r--r--target/linux/ramips/patches-4.4/0200-linkit_bootstrap.patch94
1 files changed, 94 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.4/0200-linkit_bootstrap.patch b/target/linux/ramips/patches-4.4/0200-linkit_bootstrap.patch
new file mode 100644
index 0000000000..70e8170c44
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0200-linkit_bootstrap.patch
@@ -0,0 +1,94 @@
+--- 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);