add driver 5G

hc

2024-01-31 f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2

 kernel/drivers/i2c/busses/i2c-uniphier.c
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@@ -1,15 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  */
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5
 
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 #include <linux/clk.h>
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@@ -44,9 +35,6 @@
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 #define UNIPHIER_I2C_NOISE	0x1c	/* noise filter control */
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 #define UNIPHIER_I2C_SETUP	0x20	/* setup time control */
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-#define UNIPHIER_I2C_DEFAULT_SPEED	100000
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-#define UNIPHIER_I2C_MAX_SPEED		400000
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-
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 struct uniphier_i2c_priv {
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 	struct completion comp;
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 	struct i2c_adapter adap;
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@@ -80,7 +68,6 @@
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 	reinit_completion(&priv->comp);
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 	txdata |= UNIPHIER_I2C_DTRM_IRQEN;
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-	dev_dbg(&adap->dev, "write data: 0x%04x\n", txdata);
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 	writel(txdata, priv->membase + UNIPHIER_I2C_DTRM);
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 	time_left = wait_for_completion_timeout(&priv->comp, adap->timeout);
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@@ -90,8 +77,6 @@
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 	}
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 	rxdata = readl(priv->membase + UNIPHIER_I2C_DREC);
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-	dev_dbg(&adap->dev, "read data: 0x%04x\n", rxdata);
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-
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 	if (rxdatap)
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 		*rxdatap = rxdata;
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@@ -107,14 +92,11 @@
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 	if (ret)
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 		return ret;
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-	if (unlikely(rxdata & UNIPHIER_I2C_DREC_LAB)) {
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-		dev_dbg(&adap->dev, "arbitration lost\n");
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+	if (unlikely(rxdata & UNIPHIER_I2C_DREC_LAB))
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 		return -EAGAIN;
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-	}
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-	if (unlikely(rxdata & UNIPHIER_I2C_DREC_LRB)) {
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-		dev_dbg(&adap->dev, "could not get ACK\n");
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+
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+	if (unlikely(rxdata & UNIPHIER_I2C_DREC_LRB))
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 		return -ENXIO;
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-	}
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 	return 0;
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 }
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@@ -124,7 +106,6 @@
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 {
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 	int ret;
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-	dev_dbg(&adap->dev, "start condition\n");
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 	ret = uniphier_i2c_send_byte(adap, addr << 1 |
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 				     UNIPHIER_I2C_DTRM_STA |
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 				     UNIPHIER_I2C_DTRM_NACK);
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@@ -146,7 +127,6 @@
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 {
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 	int ret;
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-	dev_dbg(&adap->dev, "start condition\n");
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 	ret = uniphier_i2c_send_byte(adap, addr << 1 |
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 				     UNIPHIER_I2C_DTRM_STA |
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 				     UNIPHIER_I2C_DTRM_NACK |
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@@ -170,7 +150,6 @@
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 static int uniphier_i2c_stop(struct i2c_adapter *adap)
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 {
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-	dev_dbg(&adap->dev, "stop condition\n");
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 	return uniphier_i2c_send_byte(adap, UNIPHIER_I2C_DTRM_STO |
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 				      UNIPHIER_I2C_DTRM_NACK);
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 }
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@@ -181,9 +160,6 @@
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 	bool is_read = msg->flags & I2C_M_RD;
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 	bool recovery = false;
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 	int ret;
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-
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-	dev_dbg(&adap->dev, "%s: addr=0x%02x, len=%d, stop=%d\n",
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-		is_read ? "receive" : "transmit", msg->addr, msg->len, stop);
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 	if (is_read)
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 		ret = uniphier_i2c_rx(adap, msg->addr, msg->len, msg->buf);
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@@ -335,7 +311,6 @@
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 {
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 	struct device *dev = &pdev->dev;
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 	struct uniphier_i2c_priv *priv;
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-	struct resource *regs;
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 	u32 bus_speed;
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 	unsigned long clk_rate;
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 	int irq, ret;
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@@ -344,21 +319,18 @@
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 	if (!priv)
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 		return -ENOMEM;
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-	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	priv->membase = devm_ioremap_resource(dev, regs);
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+	priv->membase = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(priv->membase))
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 		return PTR_ERR(priv->membase);
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 	irq = platform_get_irq(pdev, 0);
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-	if (irq < 0) {
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-		dev_err(dev, "failed to get IRQ number\n");
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+	if (irq < 0)
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 		return irq;
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-	}
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 	if (of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed))
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-		bus_speed = UNIPHIER_I2C_DEFAULT_SPEED;
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+		bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
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-	if (!bus_speed || bus_speed > UNIPHIER_I2C_MAX_SPEED) {
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+	if (!bus_speed || bus_speed > I2C_MAX_FAST_MODE_FREQ) {
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 		dev_err(dev, "invalid clock-frequency %d\n", bus_speed);
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 		return -EINVAL;
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 	}