ramips: drop support for kernel 4.14

The target seems to be working on 5.4, so drop 4.14 support in
preparation for removing it from master entirely.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 473 deletions

diff --git a/target/linux/ramips/patches-4.14/0045-i2c-add-mt7621-driver.patch b/target/linux/ramips/patches-4.14/0045-i2c-add-mt7621-driver.patch
deleted file mode 100644
index a848085520..0000000000
--- a/target/linux/ramips/patches-4.14/0045-i2c-add-mt7621-driver.patch
+++ /dev/null
@@ -1,473 +0,0 @@
-From d5c54ff3d1db0a4348fa04d8e78f3bf6063e3afc Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Mon, 7 Dec 2015 17:21:27 +0100
-Subject: [PATCH 45/53] i2c: add mt7621 driver
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- drivers/i2c/busses/Kconfig      |    4 +
- drivers/i2c/busses/Makefile     |    1 +
- drivers/i2c/busses/i2c-mt7621.c |  303 +++++++++++++++++++++++++++++++++++++++
- 3 files changed, 308 insertions(+)
- create mode 100644 drivers/i2c/busses/i2c-mt7621.c
-
---- a/drivers/i2c/busses/Kconfig
-+++ b/drivers/i2c/busses/Kconfig
-@@ -869,6 +869,11 @@ config I2C_RALINK
- 	depends on RALINK && !SOC_MT7621
- 	select OF_I2C
- 
-+config I2C_MT7621
-+	tristate "MT7621/MT7628 I2C Controller"
-+	depends on RALINK && (SOC_MT7620 || SOC_MT7621)
-+	select OF_I2C
-+
- config HAVE_S3C2410_I2C
- 	bool
- 	help
---- a/drivers/i2c/busses/Makefile
-+++ b/drivers/i2c/busses/Makefile
-@@ -85,6 +85,7 @@ obj-$(CONFIG_I2C_PUV3)		+= i2c-puv3.o
- obj-$(CONFIG_I2C_PXA)		+= i2c-pxa.o
- obj-$(CONFIG_I2C_PXA_PCI)	+= i2c-pxa-pci.o
- obj-$(CONFIG_I2C_RALINK)	+= i2c-ralink.o
-+obj-$(CONFIG_I2C_MT7621)	+= i2c-mt7621.o
- obj-$(CONFIG_I2C_QUP)		+= i2c-qup.o
- obj-$(CONFIG_I2C_RIIC)		+= i2c-riic.o
- obj-$(CONFIG_I2C_RK3X)		+= i2c-rk3x.o
---- /dev/null
-+++ b/drivers/i2c/busses/i2c-mt7621.c
-@@ -0,0 +1,433 @@
-+/*
-+ * drivers/i2c/busses/i2c-mt7621.c
-+ *
-+ * Copyright (C) 2013 Steven Liu <steven_liu@mediatek.com>
-+ * Copyright (C) 2016 Michael Lee <igvtee@gmail.com>
-+ *
-+ * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus.
-+ * (C) 2014 Sittisak <sittisaks@hotmail.com>
-+ *
-+ * This software is licensed under the terms of the GNU General Public
-+ * License version 2, as published by the Free Software Foundation, and
-+ * may be copied, distributed, and modified under those terms.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-+ * GNU General Public License for more details.
-+ *
-+ */
-+
-+#include <linux/interrupt.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/reset.h>
-+#include <linux/delay.h>
-+#include <linux/slab.h>
-+#include <linux/init.h>
-+#include <linux/errno.h>
-+#include <linux/platform_device.h>
-+#include <linux/of_platform.h>
-+#include <linux/i2c.h>
-+#include <linux/io.h>
-+#include <linux/err.h>
-+#include <linux/clk.h>
-+
-+#define REG_SM0CFG0		0x08
-+#define REG_SM0DOUT		0x10
-+#define REG_SM0DIN		0x14
-+#define REG_SM0ST		0x18
-+#define REG_SM0AUTO		0x1C
-+#define REG_SM0CFG1		0x20
-+#define REG_SM0CFG2		0x28
-+#define REG_SM0CTL0		0x40
-+#define REG_SM0CTL1		0x44
-+#define REG_SM0D0		0x50
-+#define REG_SM0D1		0x54
-+#define REG_PINTEN		0x5C
-+#define REG_PINTST		0x60
-+#define REG_PINTCL		0x64
-+
-+/* REG_SM0CFG0 */
-+#define I2C_DEVADDR_MASK	0x7f
-+
-+/* REG_SM0ST */
-+#define I2C_DATARDY		BIT(2)
-+#define I2C_SDOEMPTY		BIT(1)
-+#define I2C_BUSY		BIT(0)
-+
-+/* REG_SM0AUTO */
-+#define READ_CMD		BIT(0)
-+
-+/* REG_SM0CFG1 */
-+#define BYTECNT_MAX		64
-+#define SET_BYTECNT(x)		(x - 1)
-+
-+/* REG_SM0CFG2 */
-+#define AUTOMODE_EN		BIT(0)
-+
-+/* REG_SM0CTL0 */
-+#define ODRAIN_HIGH_SM0		BIT(31)
-+#define VSYNC_SHIFT		28
-+#define VSYNC_MASK		0x3
-+#define VSYNC_PULSE		(0x1 << VSYNC_SHIFT)
-+#define VSYNC_RISING		(0x2 << VSYNC_SHIFT)
-+#define CLK_DIV_SHIFT		16
-+#define CLK_DIV_MASK		0xfff
-+#define DEG_CNT_SHIFT		8
-+#define DEG_CNT_MASK		0xff
-+#define WAIT_HIGH		BIT(6)
-+#define DEG_EN			BIT(5)
-+#define CS_STATUA		BIT(4)
-+#define SCL_STATUS		BIT(3)
-+#define SDA_STATUS		BIT(2)
-+#define SM0_EN			BIT(1)
-+#define SCL_STRECH		BIT(0)
-+
-+/* REG_SM0CTL1 */
-+#define ACK_SHIFT		16
-+#define ACK_MASK		0xff
-+#define PGLEN_SHIFT		8
-+#define PGLEN_MASK		0x7
-+#define SM0_MODE_SHIFT		4
-+#define SM0_MODE_MASK		0x7
-+#define SM0_MODE_START		0x1
-+#define SM0_MODE_WRITE		0x2
-+#define SM0_MODE_STOP		0x3
-+#define SM0_MODE_READ_NACK	0x4
-+#define SM0_MODE_READ_ACK	0x5
-+#define SM0_TRI_BUSY		BIT(0)
-+
-+/* timeout waiting for I2C devices to respond (clock streching) */
-+#define TIMEOUT_MS              1000
-+#define DELAY_INTERVAL_US       100
-+
-+struct mtk_i2c {
-+	void __iomem *base;
-+	struct clk *clk;
-+	struct device *dev;
-+	struct i2c_adapter adap;
-+	u32 cur_clk;
-+	u32 clk_div;
-+	u32 flags;
-+};
-+
-+static void mtk_i2c_w32(struct mtk_i2c *i2c, u32 val, unsigned reg)
-+{
-+	iowrite32(val, i2c->base + reg);
-+}
-+
-+static u32 mtk_i2c_r32(struct mtk_i2c *i2c, unsigned reg)
-+{
-+	return ioread32(i2c->base + reg);
-+}
-+
-+static int poll_down_timeout(void __iomem *addr, u32 mask)
-+{
-+	unsigned long timeout = jiffies + msecs_to_jiffies(TIMEOUT_MS);
-+
-+	do {
-+		if (!(readl_relaxed(addr) & mask))
-+			return 0;
-+
-+		usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
-+	} while (time_before(jiffies, timeout));
-+
-+	return (readl_relaxed(addr) & mask) ? -EAGAIN : 0;
-+}
-+
-+static int mtk_i2c_wait_idle(struct mtk_i2c *i2c)
-+{
-+	int ret;
-+
-+	ret = poll_down_timeout(i2c->base + REG_SM0ST, I2C_BUSY);
-+	if (ret < 0)
-+		dev_dbg(i2c->dev, "idle err(%d)\n", ret);
-+
-+	return ret;
-+}
-+
-+static int poll_up_timeout(void __iomem *addr, u32 mask)
-+{
-+	unsigned long timeout = jiffies + msecs_to_jiffies(TIMEOUT_MS);
-+	u32 status;
-+
-+	do {
-+		status = readl_relaxed(addr);
-+		if (status & mask)
-+			return 0;
-+		usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
-+	} while (time_before(jiffies, timeout));
-+
-+	return -ETIMEDOUT;
-+}
-+
-+static int mtk_i2c_wait_rx_done(struct mtk_i2c *i2c)
-+{
-+	int ret;
-+
-+	ret = poll_up_timeout(i2c->base + REG_SM0ST, I2C_DATARDY);
-+	if (ret < 0)
-+		dev_dbg(i2c->dev, "rx err(%d)\n", ret);
-+
-+	return ret;
-+}
-+
-+static int mtk_i2c_wait_tx_done(struct mtk_i2c *i2c)
-+{
-+	int ret;
-+
-+	ret = poll_up_timeout(i2c->base + REG_SM0ST, I2C_SDOEMPTY);
-+	if (ret < 0)
-+		dev_dbg(i2c->dev, "tx err(%d)\n", ret);
-+
-+	return ret;
-+}
-+
-+static void mtk_i2c_reset(struct mtk_i2c *i2c)
-+{
-+	u32 reg;
-+	device_reset(i2c->adap.dev.parent);
-+	barrier();
-+
-+	/* ctrl0 */
-+	reg = ODRAIN_HIGH_SM0 | VSYNC_PULSE | (i2c->clk_div << CLK_DIV_SHIFT) |
-+		WAIT_HIGH | SM0_EN;
-+	mtk_i2c_w32(i2c, reg, REG_SM0CTL0);
-+
-+	/* auto mode */
-+	mtk_i2c_w32(i2c, AUTOMODE_EN, REG_SM0CFG2);
-+}
-+
-+static void mtk_i2c_dump_reg(struct mtk_i2c *i2c)
-+{
-+	dev_dbg(i2c->dev, "cfg0 %08x, dout %08x, din %08x, " \
-+			"status %08x, auto %08x, cfg1 %08x, " \
-+			"cfg2 %08x, ctl0 %08x, ctl1 %08x\n",
-+			mtk_i2c_r32(i2c, REG_SM0CFG0),
-+			mtk_i2c_r32(i2c, REG_SM0DOUT),
-+			mtk_i2c_r32(i2c, REG_SM0DIN),
-+			mtk_i2c_r32(i2c, REG_SM0ST),
-+			mtk_i2c_r32(i2c, REG_SM0AUTO),
-+			mtk_i2c_r32(i2c, REG_SM0CFG1),
-+			mtk_i2c_r32(i2c, REG_SM0CFG2),
-+			mtk_i2c_r32(i2c, REG_SM0CTL0),
-+			mtk_i2c_r32(i2c, REG_SM0CTL1));
-+}
-+
-+static int mtk_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
-+		int num)
-+{
-+	struct mtk_i2c *i2c;
-+	struct i2c_msg *pmsg;
-+	int i, j, ret;
-+	u32 cmd;
-+
-+	i2c = i2c_get_adapdata(adap);
-+
-+	for (i = 0; i < num; i++) {
-+		pmsg = &msgs[i];
-+		cmd = 0;
-+
-+		dev_dbg(i2c->dev, "addr: 0x%x, len: %d, flags: 0x%x\n",
-+				pmsg->addr, pmsg->len, pmsg->flags);
-+
-+		/* wait hardware idle */
-+		if ((ret = mtk_i2c_wait_idle(i2c)))
-+			goto err_timeout;
-+
-+		if (pmsg->flags & I2C_M_TEN) {
-+			dev_dbg(i2c->dev, "10 bits addr not supported\n");
-+			return -EINVAL;
-+		} else {
-+			/* 7 bits address */
-+			mtk_i2c_w32(i2c, pmsg->addr & I2C_DEVADDR_MASK,
-+					REG_SM0CFG0);
-+		}
-+
-+		/* buffer length */
-+		if (pmsg->len == 0) {
-+			dev_dbg(i2c->dev, "length is 0\n");
-+			return -EINVAL;
-+		} else
-+			mtk_i2c_w32(i2c, SET_BYTECNT(pmsg->len),
-+					REG_SM0CFG1);
-+
-+		j = 0;
-+		if (pmsg->flags & I2C_M_RD) {
-+			cmd |= READ_CMD;
-+			/* start transfer */
-+			barrier();
-+			mtk_i2c_w32(i2c, cmd, REG_SM0AUTO);
-+			do {
-+				/* wait */
-+				if ((ret = mtk_i2c_wait_rx_done(i2c)))
-+					goto err_timeout;
-+				/* read data */
-+				if (pmsg->len)
-+					pmsg->buf[j] = mtk_i2c_r32(i2c,
-+							REG_SM0DIN);
-+				j++;
-+			} while (j < pmsg->len);
-+		} else {
-+			do {
-+				/* write data */
-+				if (pmsg->len)
-+					mtk_i2c_w32(i2c, pmsg->buf[j],
-+							REG_SM0DOUT);
-+				/* start transfer */
-+				if (j == 0) {
-+					barrier();
-+					mtk_i2c_w32(i2c, cmd, REG_SM0AUTO);
-+				}
-+				/* wait */
-+				if ((ret = mtk_i2c_wait_tx_done(i2c)))
-+					goto err_timeout;
-+				j++;
-+			} while (j < pmsg->len);
-+		}
-+	}
-+	/* the return value is number of executed messages */
-+	ret = i;
-+
-+	return ret;
-+
-+err_timeout:
-+	mtk_i2c_dump_reg(i2c);
-+	mtk_i2c_reset(i2c);
-+	return ret;
-+}
-+
-+static u32 mtk_i2c_func(struct i2c_adapter *a)
-+{
-+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-+}
-+
-+static const struct i2c_algorithm mtk_i2c_algo = {
-+	.master_xfer	= mtk_i2c_master_xfer,
-+	.functionality	= mtk_i2c_func,
-+};
-+
-+static const struct of_device_id i2c_mtk_dt_ids[] = {
-+	{ .compatible = "mediatek,mt7621-i2c" },
-+	{ /* sentinel */ }
-+};
-+
-+MODULE_DEVICE_TABLE(of, i2c_mtk_dt_ids);
-+
-+static struct i2c_adapter_quirks mtk_i2c_quirks = {
-+        .max_write_len = BYTECNT_MAX,
-+        .max_read_len = BYTECNT_MAX,
-+};
-+
-+static void mtk_i2c_init(struct mtk_i2c *i2c)
-+{
-+	i2c->clk_div = clk_get_rate(i2c->clk) / i2c->cur_clk;
-+	if (i2c->clk_div > CLK_DIV_MASK)
-+		i2c->clk_div = CLK_DIV_MASK;
-+
-+	mtk_i2c_reset(i2c);
-+}
-+
-+static int mtk_i2c_probe(struct platform_device *pdev)
-+{
-+	struct resource *res;
-+	struct mtk_i2c *i2c;
-+	struct i2c_adapter *adap;
-+	const struct of_device_id *match;
-+	int ret;
-+
-+	match = of_match_device(i2c_mtk_dt_ids, &pdev->dev);
-+
-+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+	if (!res) {
-+		dev_err(&pdev->dev, "no memory resource found\n");
-+		return -ENODEV;
-+	}
-+
-+	i2c = devm_kzalloc(&pdev->dev, sizeof(struct mtk_i2c), GFP_KERNEL);
-+	if (!i2c) {
-+		dev_err(&pdev->dev, "failed to allocate i2c_adapter\n");
-+		return -ENOMEM;
-+	}
-+
-+	i2c->base = devm_ioremap_resource(&pdev->dev, res);
-+	if (IS_ERR(i2c->base))
-+		return PTR_ERR(i2c->base);
-+
-+	i2c->clk = devm_clk_get(&pdev->dev, NULL);
-+	if (IS_ERR(i2c->clk)) {
-+		dev_err(&pdev->dev, "no clock defined\n");
-+		return -ENODEV;
-+	}
-+	clk_prepare_enable(i2c->clk);
-+	i2c->dev = &pdev->dev;
-+
-+	if (of_property_read_u32(pdev->dev.of_node,
-+				"clock-frequency", &i2c->cur_clk))
-+		i2c->cur_clk = 100000;
-+
-+	adap = &i2c->adap;
-+	adap->owner = THIS_MODULE;
-+	adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
-+	adap->algo = &mtk_i2c_algo;
-+	adap->retries = 3;
-+	adap->dev.parent = &pdev->dev;
-+	i2c_set_adapdata(adap, i2c);
-+	adap->dev.of_node = pdev->dev.of_node;
-+	strlcpy(adap->name, dev_name(&pdev->dev), sizeof(adap->name));
-+	adap->quirks = &mtk_i2c_quirks;
-+
-+	platform_set_drvdata(pdev, i2c);
-+
-+	mtk_i2c_init(i2c);
-+
-+	ret = i2c_add_adapter(adap);
-+	if (ret < 0) {
-+		dev_err(&pdev->dev, "failed to add adapter\n");
-+		clk_disable_unprepare(i2c->clk);
-+		return ret;
-+	}
-+
-+	dev_info(&pdev->dev, "clock %uKHz, re-start not support\n",
-+			i2c->cur_clk/1000);
-+
-+	return ret;
-+}
-+
-+static int mtk_i2c_remove(struct platform_device *pdev)
-+{
-+	struct mtk_i2c *i2c = platform_get_drvdata(pdev);
-+
-+	i2c_del_adapter(&i2c->adap);
-+	clk_disable_unprepare(i2c->clk);
-+
-+	return 0;
-+}
-+
-+static struct platform_driver mtk_i2c_driver = {
-+	.probe		= mtk_i2c_probe,
-+	.remove		= mtk_i2c_remove,
-+	.driver		= {
-+		.owner	= THIS_MODULE,
-+		.name	= "i2c-mt7621",
-+		.of_match_table = i2c_mtk_dt_ids,
-+	},
-+};
-+
-+static int __init i2c_mtk_init (void)
-+{
-+	return platform_driver_register(&mtk_i2c_driver);
-+}
-+subsys_initcall(i2c_mtk_init);
-+
-+static void __exit i2c_mtk_exit (void)
-+{
-+	platform_driver_unregister(&mtk_i2c_driver);
-+}
-+module_exit(i2c_mtk_exit);
-+
-+MODULE_AUTHOR("Steven Liu <steven_liu@mediatek.com>");
-+MODULE_DESCRIPTION("MT7621 I2c host driver");
-+MODULE_LICENSE("GPL");
-+MODULE_ALIAS("platform:MT7621-I2C");