[RFC/RFT 7/7] i2c: sh_mobile: update copyright and comments

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Update copyright years and add Renesas to it. Add/update comments to
make driver easier to understand.

Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/i2c/busses/i2c-sh_mobile.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index dd4df961d8eb..568245f964cb 100644
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -2,8 +2,8 @@
 /*
  * SuperH Mobile I2C Controller
  *
- * Copyright (C) 2014 Wolfram Sang <wsa@xxxxxxxxxxxxxxxxxxxx>
- *
+ * Copyright (C) 2014-19 Renesas Electronics Corporation
+ * Copyright (C) 2014-19 Wolfram Sang <wsa@xxxxxxxxxxxxxxxxxxxx>
  * Copyright (C) 2008 Magnus Damm
  *
  * Portions of the code based on out-of-tree driver i2c-sh7343.c
@@ -373,6 +373,7 @@ static int sh_mobile_i2c_isr_rx(struct sh_mobile_i2c_data *pd)
 	unsigned char data;
 	int real_pos;
 
+	/* switch from TX (address) to RX (data) adds two interrupts */
 	real_pos = pd->pos - 2;
 
 	if (pd->pos == -1) {
@@ -717,8 +718,7 @@ static const struct i2c_adapter_quirks sh_mobile_i2c_quirks = {
 };
 
 /*
- * r8a7740 chip has lasting errata on I2C I/O pad reset.
- * this is work-around for it.
+ * r8a7740 has an errata regarding I2C I/O pad reset needing this workaround.
  */
 static int sh_mobile_i2c_r8a7740_workaround(struct sh_mobile_i2c_data *pd)
 {
-- 
2.11.0




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