add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/drivers/rtc/rtc-rs5c372.c
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@@ -1,13 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * An I2C driver for Ricoh RS5C372, R2025S/D and RV5C38[67] RTCs
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  *
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  * Copyright (C) 2005 Pavel Mironchik <pmironchik@optifacio.net>
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  * Copyright (C) 2006 Tower Technologies
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  * Copyright (C) 2008 Paul Mundt
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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 version 2 as
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- * published by the Free Software Foundation.
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  */
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9
 
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 #include <linux/i2c.h>
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@@ -52,8 +49,10 @@
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 #	define RS5C_CTRL1_CT4		(4 << 0)	/* 1 Hz level irq */
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 #define RS5C_REG_CTRL2		15
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 #	define RS5C372_CTRL2_24		(1 << 5)
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-#	define R2025_CTRL2_XST		(1 << 5)
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-#	define RS5C_CTRL2_XSTP		(1 << 4)	/* only if !R2025S/D */
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+#	define RS5C_CTRL2_XSTP		(1 << 4)	/* only if !R2x2x */
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+#	define R2x2x_CTRL2_VDET		(1 << 6)	/* only if  R2x2x */
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+#	define R2x2x_CTRL2_XSTP		(1 << 5)	/* only if  R2x2x */
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+#	define R2x2x_CTRL2_PON		(1 << 4)	/* only if  R2x2x */
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 #	define RS5C_CTRL2_CTFG		(1 << 2)
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 #	define RS5C_CTRL2_AAFG		(1 << 1)	/* or WAFG */
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 #	define RS5C_CTRL2_BAFG		(1 << 0)	/* or DAFG */
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@@ -212,9 +211,26 @@
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 	struct i2c_client *client = to_i2c_client(dev);
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 	struct rs5c372	*rs5c = i2c_get_clientdata(client);
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 	int		status = rs5c_get_regs(rs5c);
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+	unsigned char ctrl2 = rs5c->regs[RS5C_REG_CTRL2];
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 	if (status < 0)
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 		return status;
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+
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+	switch (rs5c->type) {
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+	case rtc_r2025sd:
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+	case rtc_r2221tl:
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+		if ((rs5c->type == rtc_r2025sd && !(ctrl2 & R2x2x_CTRL2_XSTP)) ||
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+		    (rs5c->type == rtc_r2221tl &&  (ctrl2 & R2x2x_CTRL2_XSTP))) {
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+			dev_warn(&client->dev, "rtc oscillator interruption detected. Please reset the rtc clock.\n");
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+			return -EINVAL;
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+		}
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+		break;
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+	default:
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+		if (ctrl2 & RS5C_CTRL2_XSTP) {
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+			dev_warn(&client->dev, "rtc oscillator interruption detected. Please reset the rtc clock.\n");
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+			return -EINVAL;
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+		}
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+	}
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 	tm->tm_sec = bcd2bin(rs5c->regs[RS5C372_REG_SECS] & 0x7f);
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 	tm->tm_min = bcd2bin(rs5c->regs[RS5C372_REG_MINS] & 0x7f);
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@@ -243,6 +259,7 @@
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 	struct i2c_client *client = to_i2c_client(dev);
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 	struct rs5c372	*rs5c = i2c_get_clientdata(client);
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 	unsigned char	buf[7];
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+	unsigned char	ctrl2;
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 	int		addr;
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264
 
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 	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d "
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@@ -261,7 +278,32 @@
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 	buf[6] = bin2bcd(tm->tm_year - 100);
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 	if (i2c_smbus_write_i2c_block_data(client, addr, sizeof(buf), buf) < 0) {
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-		dev_err(&client->dev, "%s: write error\n", __func__);
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+		dev_dbg(&client->dev, "%s: write error in line %i\n",
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+			__func__, __LINE__);
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+		return -EIO;
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+	}
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+
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+	addr = RS5C_ADDR(RS5C_REG_CTRL2);
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+	ctrl2 = i2c_smbus_read_byte_data(client, addr);
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+
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+	/* clear rtc warning bits */
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+	switch (rs5c->type) {
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+	case rtc_r2025sd:
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+	case rtc_r2221tl:
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+		ctrl2 &= ~(R2x2x_CTRL2_VDET | R2x2x_CTRL2_PON);
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+		if (rs5c->type == rtc_r2025sd)
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+			ctrl2 |= R2x2x_CTRL2_XSTP;
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+		else
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+			ctrl2 &= ~R2x2x_CTRL2_XSTP;
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+		break;
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+	default:
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+		ctrl2 &= ~RS5C_CTRL2_XSTP;
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+		break;
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+	}
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+
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+	if (i2c_smbus_write_byte_data(client, addr, ctrl2) < 0) {
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+		dev_dbg(&client->dev, "%s: write error in line %i\n",
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+			__func__, __LINE__);
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 		return -EIO;
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 	}
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..
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@@ -519,20 +561,25 @@
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 	unsigned char buf[2];
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 	int addr, i, ret = 0;
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-	if (rs5c372->type == rtc_r2025sd) {
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-		if (rs5c372->regs[RS5C_REG_CTRL2] & R2025_CTRL2_XST)
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-			return ret;
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-		rs5c372->regs[RS5C_REG_CTRL2] |= R2025_CTRL2_XST;
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-	} else {
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-		if (!(rs5c372->regs[RS5C_REG_CTRL2] & RS5C_CTRL2_XSTP))
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-			return ret;
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-		rs5c372->regs[RS5C_REG_CTRL2] &= ~RS5C_CTRL2_XSTP;
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-	}
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-
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 	addr   = RS5C_ADDR(RS5C_REG_CTRL1);
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 	buf[0] = rs5c372->regs[RS5C_REG_CTRL1];
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 	buf[1] = rs5c372->regs[RS5C_REG_CTRL2];
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+	switch (rs5c372->type) {
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+	case rtc_r2025sd:
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+		if (buf[1] & R2x2x_CTRL2_XSTP)
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+			return ret;
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+		break;
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+	case rtc_r2221tl:
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+		if (!(buf[1] & R2x2x_CTRL2_XSTP))
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+			return ret;
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+		break;
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+	default:
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+		if (!(buf[1] & RS5C_CTRL2_XSTP))
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+			return ret;
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+		break;
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+	}
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+
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 	/* use 24hr mode */
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 	switch (rs5c372->type) {
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 	case rtc_rs5c372a: