ramips: preliminary support for 4.14

[openwrt/staging/kaloz.git] / target / linux / ramips / patches-4.14 / 0200-linkit_bootstrap.patch

diff --git a/target/linux/ramips/patches-4.14/0200-linkit_bootstrap.patch b/target/linux/ramips/patches-4.14/0200-linkit_bootstrap.patch
new file mode 100644 (file)
index 0000000..865ae79
--- /dev/null
+++ b/target/linux/ramips/patches-4.14/0200-linkit_bootstrap.patch
@@ -0,0 +1,97 @@
+--- a/drivers/misc/Makefile
++++ b/drivers/misc/Makefile
+@@ -57,6 +57,7 @@ obj-$(CONFIG_CXL_BASE)               += cxl/
+ obj-$(CONFIG_ASPEED_LPC_CTRL) += aspeed-lpc-ctrl.o
+ obj-$(CONFIG_ASPEED_LPC_SNOOP)        += aspeed-lpc-snoop.o
+ obj-$(CONFIG_PCI_ENDPOINT_TEST)       += pci_endpoint_test.o
++obj-$(CONFIG_SOC_MT7620)      += linkit.o
+ 
+ lkdtm-$(CONFIG_LKDTM)         += lkdtm_core.o
+ lkdtm-$(CONFIG_LKDTM)         += lkdtm_bugs.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);