add ax88772C AX88772C_eeprom_tools

hc

2024-05-10 61598093bbdd283a7edc367d900f223070ead8d2

 kernel/drivers/i2c/busses/i2c-stu300.c
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@@ -1,6 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (C) 2007-2012 ST-Ericsson AB
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- * License terms: GNU General Public License (GPL) version 2
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  * ST DDC I2C master mode driver, used in e.g. U300 series platforms.
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  * Author: Linus Walleij <linus.walleij@stericsson.com>
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  * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
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@@ -132,7 +132,7 @@
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 #define NUM_ADDR_RESEND_ATTEMPTS 12
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 /* I2C clock speed, in Hz 0-400kHz*/
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-static unsigned int scl_frequency = 100000;
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+static unsigned int scl_frequency = I2C_MAX_STANDARD_MODE_FREQ;
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 module_param(scl_frequency, uint,  0644);
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 /**
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@@ -328,12 +328,6 @@
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 {
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 	int ret;
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-	if (unlikely(irqs_disabled())) {
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-		/* TODO: implement polling for this case if need be. */
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-		WARN(1, "irqs are disabled, cannot poll for event\n");
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-		return -EIO;
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-	}
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-
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 	/* Lock command issue, fill in an event we wait for */
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 	spin_lock_irq(&dev->cmd_issue_lock);
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 	init_completion(&dev->cmd_complete);
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@@ -379,13 +373,6 @@
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 				enum stu300_event mr_event)
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 {
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 	int ret;
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-
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-	if (unlikely(irqs_disabled())) {
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-		/* TODO: implement polling for this case if need be. */
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-		dev_err(&dev->pdev->dev, "irqs are disabled on this "
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-			"system!\n");
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-		return -EIO;
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-	}
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 	/* Is it already here? */
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 	spin_lock_irq(&dev->cmd_issue_lock);
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@@ -457,7 +444,7 @@
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 		       "Attempt: %d\n", i+1);
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 		dev_err(&dev->pdev->dev, "base address = "
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-			"0x%08x, reinit hardware\n", (u32) dev->virtbase);
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+			"0x%p, reinit hardware\n", dev->virtbase);
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 		(void) stu300_init_hw(dev);
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 	}
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@@ -510,7 +497,7 @@
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 	dev_dbg(&dev->pdev->dev, "Clock rate %lu Hz, I2C bus speed %d Hz "
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 		"virtbase %p\n", clkrate, dev->speed, dev->virtbase);
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-	if (dev->speed > 100000)
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+	if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ)
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 		/* Fast Mode I2C */
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 		val = ((clkrate/dev->speed) - 9)/3 + 1;
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 	else
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@@ -531,7 +518,7 @@
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 		return -EINVAL;
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 	}
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-	if (dev->speed > 100000) {
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+	if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ) {
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 		/* CC6..CC0 */
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 		stu300_wr8((val & I2C_CCR_CC_MASK) | I2C_CCR_FMSM,
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 			   dev->virtbase + I2C_CCR);
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@@ -846,6 +833,13 @@
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 	return num;
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 }
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+static int stu300_xfer_todo(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
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+{
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+	/* TODO: implement polling for this case if need be. */
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+	WARN(1, "%s: atomic transfers not implemented\n", dev_name(&adap->dev));
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+	return -EOPNOTSUPP;
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+}
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+
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 static u32 stu300_func(struct i2c_adapter *adap)
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 {
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 	/* This is the simplest thing you can think of... */
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@@ -853,8 +847,9 @@
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 }
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 static const struct i2c_algorithm stu300_algo = {
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-	.master_xfer	= stu300_xfer,
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-	.functionality	= stu300_func,
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+	.master_xfer = stu300_xfer,
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+	.master_xfer_atomic = stu300_xfer_todo,
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+	.functionality = stu300_func,
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 };
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 static const struct i2c_adapter_quirks stu300_quirks = {
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@@ -865,7 +860,6 @@
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 {
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 	struct stu300_dev *dev;
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 	struct i2c_adapter *adap;
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-	struct resource *res;
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 	int bus_nr;
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 	int ret = 0;
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@@ -881,8 +875,7 @@
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 	}
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 	dev->pdev = pdev;
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	dev->virtbase = devm_ioremap_resource(&pdev->dev, res);
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+	dev->virtbase = devm_platform_ioremap_resource(pdev, 0);
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 	dev_dbg(&pdev->dev, "initialize bus device I2C%d on virtual "
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 		"base %p\n", bus_nr, dev->virtbase);
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 	if (IS_ERR(dev->virtbase))