From: Baruch Siach <baruch@tkos.co.il>
Date: Sun, 7 Apr 2019 09:38:49 +0000 (+0300)
Subject: misc: i2c_eeprom: add eeprom write support
X-Git-Tag: v2019.07-rc1~29^2
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=84c80c63d53bc8a7779b1e7e7084ee3b2d20e768;p=oweals%2Fu-boot.git

misc: i2c_eeprom: add eeprom write support

Write up to page size in each i2c transfer.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Heiko Schocher <hs@denx.de>
---

diff --git a/drivers/misc/i2c_eeprom.c b/drivers/misc/i2c_eeprom.c
index ce2cad44d8..f25d054007 100644
--- a/drivers/misc/i2c_eeprom.c
+++ b/drivers/misc/i2c_eeprom.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <linux/err.h>
+#include <linux/kernel.h>
 #include <dm.h>
 #include <i2c.h>
 #include <i2c_eeprom.h>
@@ -38,7 +39,24 @@ static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
 static int i2c_eeprom_std_write(struct udevice *dev, int offset,
 				const uint8_t *buf, int size)
 {
-	return -ENODEV;
+	struct i2c_eeprom *priv = dev_get_priv(dev);
+	int ret;
+
+	while (size > 0) {
+		int write_size = min_t(int, size, priv->pagesize);
+
+		ret = dm_i2c_write(dev, offset, buf, write_size);
+		if (ret)
+			return ret;
+
+		offset += write_size;
+		buf += write_size;
+		size -= write_size;
+
+		udelay(10000);
+	}
+
+	return 0;
 }
 
 static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {