ramips: linkit: replace driver with gpio-hog

It does the same thing minus a few dmesg prints.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16788
Signed-off-by: Robert Marko <robimarko@gmail.com>

target/linux/ramips/dts/mt7628an_mediatek_linkit-smart-7688.dts

@@ -22,12 +22,6 @@
 		serial0 = &uart2;
 	};
 
-	bootstrap {
-		compatible = "mediatek,linkit";
-
-		status = "okay";
-	};
-
 	leds {
 		compatible = "gpio-leds";
 
@@ -144,6 +138,15 @@
 	};
 };
 
+&gpio {
+	bootstrap {
+		gpio-hog;
+		line-name = "bootstrap";
+		output-low;
+		gpios = <11 GPIO_ACTIVE_LOW>;
+	};
+};
+
 &i2c {
 	status = "okay";
 };

target/linux/ramips/patches-6.6/855-linkit_bootstrap.patch

@@ -1,97 +0,0 @@
---- a/drivers/misc/Makefile
-+++ b/drivers/misc/Makefile
-@@ -52,6 +52,7 @@ obj-$(CONFIG_ECHO)		+= echo/
- obj-$(CONFIG_CXL_BASE)		+= cxl/
- obj-$(CONFIG_DW_XDATA_PCIE)	+= dw-xdata-pcie.o
- obj-$(CONFIG_PCI_ENDPOINT_TEST)	+= pci_endpoint_test.o
-+obj-$(CONFIG_SOC_MT7620)	+= linkit.o
- obj-$(CONFIG_OCXL)		+= ocxl/
- obj-$(CONFIG_BCM_VK)		+= bcm-vk/
- obj-y				+= cardreader/
---- /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);