From cc4ee2eeb465c1f4404b91852e6c86a43923c55e Mon Sep 17 00:00:00 2001 From: Adrian Schmutzler Date: Sat, 6 Mar 2021 11:23:38 +0100 Subject: Revert "ramips: add support for kernel 5.10" This reverts commit b4aad29a1d7ad77d67073c1c54b28c429c64ed9b. This was accidentally folded into a single commit. Remove it and apply it properly again. Signed-off-by: Adrian Schmutzler --- .../825-i2c-MIPS-adds-ralink-I2C-driver.patch | 507 --------------------- 1 file changed, 507 deletions(-) delete mode 100644 target/linux/ramips/patches-5.10/825-i2c-MIPS-adds-ralink-I2C-driver.patch (limited to 'target/linux/ramips/patches-5.10/825-i2c-MIPS-adds-ralink-I2C-driver.patch') diff --git a/target/linux/ramips/patches-5.10/825-i2c-MIPS-adds-ralink-I2C-driver.patch b/target/linux/ramips/patches-5.10/825-i2c-MIPS-adds-ralink-I2C-driver.patch deleted file mode 100644 index 7fdbceac09..0000000000 --- a/target/linux/ramips/patches-5.10/825-i2c-MIPS-adds-ralink-I2C-driver.patch +++ /dev/null @@ -1,507 +0,0 @@ -From 723b8beaabf3c3c4b1ce69480141f1e926f3f3b2 Mon Sep 17 00:00:00 2001 -From: John Crispin -Date: Sun, 27 Jul 2014 09:52:56 +0100 -Subject: [PATCH 44/53] i2c: MIPS: adds ralink I2C driver - -Signed-off-by: John Crispin ---- - .../devicetree/bindings/i2c/i2c-ralink.txt | 27 ++ - drivers/i2c/busses/Kconfig | 4 + - drivers/i2c/busses/Makefile | 1 + - drivers/i2c/busses/i2c-ralink.c | 327 ++++++++++++++++++++ - 4 files changed, 359 insertions(+) - create mode 100644 Documentation/devicetree/bindings/i2c/i2c-ralink.txt - create mode 100644 drivers/i2c/busses/i2c-ralink.c - ---- /dev/null -+++ b/Documentation/devicetree/bindings/i2c/i2c-ralink.txt -@@ -0,0 +1,27 @@ -+I2C for Ralink platforms -+ -+Required properties : -+- compatible : Must be "link,rt3052-i2c" -+- reg: physical base address of the controller and length of memory mapped -+ region. -+- #address-cells = <1>; -+- #size-cells = <0>; -+ -+Optional properties: -+- Child nodes conforming to i2c bus binding -+ -+Example : -+ -+palmbus@10000000 { -+ i2c@900 { -+ compatible = "link,rt3052-i2c"; -+ reg = <0x900 0x100>; -+ #address-cells = <1>; -+ #size-cells = <0>; -+ -+ hwmon@4b { -+ compatible = "national,lm92"; -+ reg = <0x4b>; -+ }; -+ }; -+}; ---- a/drivers/i2c/busses/Kconfig -+++ b/drivers/i2c/busses/Kconfig -@@ -954,6 +954,11 @@ config I2C_RK3X - This driver can also be built as a module. If so, the module will - be called i2c-rk3x. - -+config I2C_RALINK -+ tristate "Ralink I2C Controller" -+ depends on RALINK && !SOC_MT7621 -+ select OF_I2C -+ - config HAVE_S3C2410_I2C - bool - help ---- a/drivers/i2c/busses/Makefile -+++ b/drivers/i2c/busses/Makefile -@@ -90,6 +90,7 @@ obj-$(CONFIG_I2C_PMCMSP) += i2c-pmcmsp.o - obj-$(CONFIG_I2C_PNX) += i2c-pnx.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_QCOM_CCI) += i2c-qcom-cci.o - obj-$(CONFIG_I2C_QCOM_GENI) += i2c-qcom-geni.o - obj-$(CONFIG_I2C_QUP) += i2c-qup.o ---- /dev/null -+++ b/drivers/i2c/busses/i2c-ralink.c -@@ -0,0 +1,435 @@ -+/* -+ * drivers/i2c/busses/i2c-ralink.c -+ * -+ * Copyright (C) 2013 Steven Liu -+ * Copyright (C) 2016 Michael Lee -+ * -+ * Improve driver for i2cdetect from i2c-tools to detect i2c devices on the bus. -+ * (C) 2014 Sittisak -+ * -+ * 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 -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+ -+#define REG_CONFIG_REG 0x00 -+#define REG_CLKDIV_REG 0x04 -+#define REG_DEVADDR_REG 0x08 -+#define REG_ADDR_REG 0x0C -+#define REG_DATAOUT_REG 0x10 -+#define REG_DATAIN_REG 0x14 -+#define REG_STATUS_REG 0x18 -+#define REG_STARTXFR_REG 0x1C -+#define REG_BYTECNT_REG 0x20 -+ -+/* REG_CONFIG_REG */ -+#define I2C_ADDRLEN_OFFSET 5 -+#define I2C_DEVADLEN_OFFSET 2 -+#define I2C_ADDRLEN_MASK 0x3 -+#define I2C_ADDR_DIS BIT(1) -+#define I2C_DEVADDR_DIS BIT(0) -+#define I2C_ADDRLEN_8 (7 << I2C_ADDRLEN_OFFSET) -+#define I2C_DEVADLEN_7 (6 << I2C_DEVADLEN_OFFSET) -+#define I2C_CONF_DEFAULT (I2C_ADDRLEN_8 | I2C_DEVADLEN_7) -+ -+/* REG_CLKDIV_REG */ -+#define I2C_CLKDIV_MASK 0xffff -+ -+/* REG_DEVADDR_REG */ -+#define I2C_DEVADDR_MASK 0x7f -+ -+/* REG_ADDR_REG */ -+#define I2C_ADDR_MASK 0xff -+ -+/* REG_STATUS_REG */ -+#define I2C_STARTERR BIT(4) -+#define I2C_ACKERR BIT(3) -+#define I2C_DATARDY BIT(2) -+#define I2C_SDOEMPTY BIT(1) -+#define I2C_BUSY BIT(0) -+ -+/* REG_STARTXFR_REG */ -+#define NOSTOP_CMD BIT(2) -+#define NODATA_CMD BIT(1) -+#define READ_CMD BIT(0) -+ -+/* REG_BYTECNT_REG */ -+#define BYTECNT_MAX 64 -+#define SET_BYTECNT(x) (x - 1) -+ -+/* timeout waiting for I2C devices to respond (clock streching) */ -+#define TIMEOUT_MS 1000 -+#define DELAY_INTERVAL_US 100 -+ -+struct rt_i2c { -+ void __iomem *base; -+ struct clk *clk; -+ struct device *dev; -+ struct i2c_adapter adap; -+ u32 cur_clk; -+ u32 clk_div; -+ u32 flags; -+}; -+ -+static void rt_i2c_w32(struct rt_i2c *i2c, u32 val, unsigned reg) -+{ -+ iowrite32(val, i2c->base + reg); -+} -+ -+static u32 rt_i2c_r32(struct rt_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 rt_i2c_wait_idle(struct rt_i2c *i2c) -+{ -+ int ret; -+ -+ ret = poll_down_timeout(i2c->base + REG_STATUS_REG, 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); -+ -+ /* check error status */ -+ if (status & I2C_STARTERR) -+ return -EAGAIN; -+ else if (status & I2C_ACKERR) -+ return -ENXIO; -+ else if (status & mask) -+ return 0; -+ -+ usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50); -+ } while (time_before(jiffies, timeout)); -+ -+ return -ETIMEDOUT; -+} -+ -+static int rt_i2c_wait_rx_done(struct rt_i2c *i2c) -+{ -+ int ret; -+ -+ ret = poll_up_timeout(i2c->base + REG_STATUS_REG, I2C_DATARDY); -+ if (ret < 0) -+ dev_dbg(i2c->dev, "rx err(%d)\n", ret); -+ -+ return ret; -+} -+ -+static int rt_i2c_wait_tx_done(struct rt_i2c *i2c) -+{ -+ int ret; -+ -+ ret = poll_up_timeout(i2c->base + REG_STATUS_REG, I2C_SDOEMPTY); -+ if (ret < 0) -+ dev_dbg(i2c->dev, "tx err(%d)\n", ret); -+ -+ return ret; -+} -+ -+static void rt_i2c_reset(struct rt_i2c *i2c) -+{ -+ device_reset(i2c->adap.dev.parent); -+ barrier(); -+ rt_i2c_w32(i2c, i2c->clk_div, REG_CLKDIV_REG); -+} -+ -+static void rt_i2c_dump_reg(struct rt_i2c *i2c) -+{ -+ dev_dbg(i2c->dev, "conf %08x, clkdiv %08x, devaddr %08x, " \ -+ "addr %08x, dataout %08x, datain %08x, " \ -+ "status %08x, startxfr %08x, bytecnt %08x\n", -+ rt_i2c_r32(i2c, REG_CONFIG_REG), -+ rt_i2c_r32(i2c, REG_CLKDIV_REG), -+ rt_i2c_r32(i2c, REG_DEVADDR_REG), -+ rt_i2c_r32(i2c, REG_ADDR_REG), -+ rt_i2c_r32(i2c, REG_DATAOUT_REG), -+ rt_i2c_r32(i2c, REG_DATAIN_REG), -+ rt_i2c_r32(i2c, REG_STATUS_REG), -+ rt_i2c_r32(i2c, REG_STARTXFR_REG), -+ rt_i2c_r32(i2c, REG_BYTECNT_REG)); -+} -+ -+static int rt_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, -+ int num) -+{ -+ struct rt_i2c *i2c; -+ struct i2c_msg *pmsg; -+ unsigned char addr; -+ int i, j, ret; -+ u32 cmd; -+ -+ i2c = i2c_get_adapdata(adap); -+ -+ for (i = 0; i < num; i++) { -+ pmsg = &msgs[i]; -+ if (i == (num - 1)) -+ cmd = 0; -+ else -+ cmd = NOSTOP_CMD; -+ -+ dev_dbg(i2c->dev, "addr: 0x%x, len: %d, flags: 0x%x, stop: %d\n", -+ pmsg->addr, pmsg->len, pmsg->flags, -+ (cmd == 0)? 1 : 0); -+ -+ /* wait hardware idle */ -+ if ((ret = rt_i2c_wait_idle(i2c))) -+ goto err_timeout; -+ -+ if (pmsg->flags & I2C_M_TEN) { -+ rt_i2c_w32(i2c, I2C_CONF_DEFAULT, REG_CONFIG_REG); -+ /* 10 bits address */ -+ addr = 0x78 | ((pmsg->addr >> 8) & 0x03); -+ rt_i2c_w32(i2c, addr & I2C_DEVADDR_MASK, -+ REG_DEVADDR_REG); -+ rt_i2c_w32(i2c, pmsg->addr & I2C_ADDR_MASK, -+ REG_ADDR_REG); -+ } else { -+ rt_i2c_w32(i2c, I2C_CONF_DEFAULT | I2C_ADDR_DIS, -+ REG_CONFIG_REG); -+ /* 7 bits address */ -+ rt_i2c_w32(i2c, pmsg->addr & I2C_DEVADDR_MASK, -+ REG_DEVADDR_REG); -+ } -+ -+ /* buffer length */ -+ if (pmsg->len == 0) -+ cmd |= NODATA_CMD; -+ else -+ rt_i2c_w32(i2c, SET_BYTECNT(pmsg->len), -+ REG_BYTECNT_REG); -+ -+ j = 0; -+ if (pmsg->flags & I2C_M_RD) { -+ cmd |= READ_CMD; -+ /* start transfer */ -+ barrier(); -+ rt_i2c_w32(i2c, cmd, REG_STARTXFR_REG); -+ do { -+ /* wait */ -+ if ((ret = rt_i2c_wait_rx_done(i2c))) -+ goto err_timeout; -+ /* read data */ -+ if (pmsg->len) -+ pmsg->buf[j] = rt_i2c_r32(i2c, -+ REG_DATAIN_REG); -+ j++; -+ } while (j < pmsg->len); -+ } else { -+ do { -+ /* write data */ -+ if (pmsg->len) -+ rt_i2c_w32(i2c, pmsg->buf[j], -+ REG_DATAOUT_REG); -+ /* start transfer */ -+ if (j == 0) { -+ barrier(); -+ rt_i2c_w32(i2c, cmd, REG_STARTXFR_REG); -+ } -+ /* wait */ -+ if ((ret = rt_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: -+ rt_i2c_dump_reg(i2c); -+ rt_i2c_reset(i2c); -+ return ret; -+} -+ -+static u32 rt_i2c_func(struct i2c_adapter *a) -+{ -+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; -+} -+ -+static const struct i2c_algorithm rt_i2c_algo = { -+ .master_xfer = rt_i2c_master_xfer, -+ .functionality = rt_i2c_func, -+}; -+ -+static const struct of_device_id i2c_rt_dt_ids[] = { -+ { .compatible = "ralink,rt2880-i2c" }, -+ { /* sentinel */ } -+}; -+ -+MODULE_DEVICE_TABLE(of, i2c_rt_dt_ids); -+ -+static struct i2c_adapter_quirks rt_i2c_quirks = { -+ .max_write_len = BYTECNT_MAX, -+ .max_read_len = BYTECNT_MAX, -+}; -+ -+static int rt_i2c_init(struct rt_i2c *i2c) -+{ -+ u32 reg; -+ -+ /* i2c_sclk = periph_clk / ((2 * clk_div) + 5) */ -+ i2c->clk_div = (clk_get_rate(i2c->clk) - (5 * i2c->cur_clk)) / -+ (2 * i2c->cur_clk); -+ if (i2c->clk_div < 8) -+ i2c->clk_div = 8; -+ if (i2c->clk_div > I2C_CLKDIV_MASK) -+ i2c->clk_div = I2C_CLKDIV_MASK; -+ -+ /* check support combinde/repeated start message */ -+ rt_i2c_w32(i2c, NOSTOP_CMD, REG_STARTXFR_REG); -+ reg = rt_i2c_r32(i2c, REG_STARTXFR_REG) & NOSTOP_CMD; -+ -+ rt_i2c_reset(i2c); -+ -+ return reg; -+} -+ -+static int rt_i2c_probe(struct platform_device *pdev) -+{ -+ struct resource *res; -+ struct rt_i2c *i2c; -+ struct i2c_adapter *adap; -+ const struct of_device_id *match; -+ int ret, restart; -+ -+ match = of_match_device(i2c_rt_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 rt_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 = &rt_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 = &rt_i2c_quirks; -+ -+ platform_set_drvdata(pdev, i2c); -+ -+ restart = rt_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 %ssupport\n", -+ i2c->cur_clk/1000, restart ? "" : "not "); -+ -+ return ret; -+} -+ -+static int rt_i2c_remove(struct platform_device *pdev) -+{ -+ struct rt_i2c *i2c = platform_get_drvdata(pdev); -+ -+ i2c_del_adapter(&i2c->adap); -+ clk_disable_unprepare(i2c->clk); -+ -+ return 0; -+} -+ -+static struct platform_driver rt_i2c_driver = { -+ .probe = rt_i2c_probe, -+ .remove = rt_i2c_remove, -+ .driver = { -+ .owner = THIS_MODULE, -+ .name = "i2c-ralink", -+ .of_match_table = i2c_rt_dt_ids, -+ }, -+}; -+ -+static int __init i2c_rt_init (void) -+{ -+ return platform_driver_register(&rt_i2c_driver); -+} -+subsys_initcall(i2c_rt_init); -+ -+static void __exit i2c_rt_exit (void) -+{ -+ platform_driver_unregister(&rt_i2c_driver); -+} -+module_exit(i2c_rt_exit); -+ -+MODULE_AUTHOR("Steven Liu "); -+MODULE_DESCRIPTION("Ralink I2c host driver"); -+MODULE_LICENSE("GPL"); -+MODULE_ALIAS("platform:Ralink-I2C"); -- cgit v1.2.3