add ax88772C AX88772C_eeprom_tools

hc

2024-05-10 61598093bbdd283a7edc367d900f223070ead8d2

 kernel/drivers/i2c/busses/i2c-synquacer.c
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@@ -67,10 +67,10 @@
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 /* STANDARD MODE frequency */
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 #define SYNQUACER_I2C_CLK_MASTER_STD(rate)			\
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-	DIV_ROUND_UP(DIV_ROUND_UP((rate), 100000) - 2, 2)
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+	DIV_ROUND_UP(DIV_ROUND_UP((rate), I2C_MAX_STANDARD_MODE_FREQ) - 2, 2)
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 /* FAST MODE frequency */
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 #define SYNQUACER_I2C_CLK_MASTER_FAST(rate)			\
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-	DIV_ROUND_UP((DIV_ROUND_UP((rate), 400000) - 2) * 2, 3)
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+	DIV_ROUND_UP((DIV_ROUND_UP((rate), I2C_MAX_FAST_MODE_FREQ) - 2) * 2, 3)
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 /* (clkrate <= 18000000) */
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 /* calculate the value of CS bits in CCR register on standard mode */
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@@ -144,8 +144,6 @@
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 	u32			timeout_ms;
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 	enum i2c_state		state;
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 	struct i2c_adapter	adapter;
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-
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-	bool			is_suspended;
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 };
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 static inline int is_lastmsg(struct synquacer_i2c *i2c)
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@@ -316,9 +314,6 @@
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 	unsigned long timeout;
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 	int ret;
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-	if (i2c->is_suspended)
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-		return -EBUSY;
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-
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 	synquacer_i2c_hw_init(i2c);
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 	bsr = readb(i2c->base + SYNQUACER_I2C_REG_BSR);
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 	if (bsr & SYNQUACER_I2C_BSR_BB) {
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@@ -403,8 +398,7 @@
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 		if (i2c->state == STATE_READ)
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 			goto prepare_read;
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-
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-		/* fallthru */
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+		fallthrough;
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 	case STATE_WRITE:
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 		if (bsr & SYNQUACER_I2C_BSR_LRB) {
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@@ -531,7 +525,7 @@
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 	.functionality	= synquacer_i2c_functionality,
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 };
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-static struct i2c_adapter synquacer_i2c_ops = {
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+static const struct i2c_adapter synquacer_i2c_ops = {
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 	.owner		= THIS_MODULE,
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 	.name		= "synquacer_i2c-adapter",
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 	.algo		= &synquacer_i2c_algo,
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@@ -541,7 +535,6 @@
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 static int synquacer_i2c_probe(struct platform_device *pdev)
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 {
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 	struct synquacer_i2c *i2c;
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-	struct resource *r;
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 	u32 bus_speed;
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 	int ret;
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@@ -558,7 +551,7 @@
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 				 &i2c->pclkrate);
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 	i2c->pclk = devm_clk_get(&pdev->dev, "pclk");
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-	if (IS_ERR(i2c->pclk) && PTR_ERR(i2c->pclk) == -EPROBE_DEFER)
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+	if (PTR_ERR(i2c->pclk) == -EPROBE_DEFER)
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 		return -EPROBE_DEFER;
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 	if (!IS_ERR_OR_NULL(i2c->pclk)) {
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 		dev_dbg(&pdev->dev, "clock source %p\n", i2c->pclk);
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@@ -579,16 +572,13 @@
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 		return -EINVAL;
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 	}
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-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	i2c->base = devm_ioremap_resource(&pdev->dev, r);
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+	i2c->base = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(i2c->base))
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 		return PTR_ERR(i2c->base);
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 	i2c->irq = platform_get_irq(pdev, 0);
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-	if (i2c->irq < 0) {
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-		dev_err(&pdev->dev, "no IRQ resource found\n");
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-		return -ENODEV;
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-	}
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+	if (i2c->irq < 0)
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+		return i2c->irq;
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 	ret = devm_request_irq(&pdev->dev, i2c->irq, synquacer_i2c_isr,
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 			       0, dev_name(&pdev->dev), i2c);
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@@ -607,7 +597,7 @@
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 	i2c->adapter.nr = pdev->id;
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 	init_completion(&i2c->completion);
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-	if (bus_speed < 400000)
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+	if (bus_speed < I2C_MAX_FAST_MODE_FREQ)
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 		i2c->speed_khz = SYNQUACER_I2C_SPEED_SM;
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 	else
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 		i2c->speed_khz = SYNQUACER_I2C_SPEED_FM;