[U-Boot] [PATCH v3 1/2] eeprom: fix DM_I2C support without CONFIG_SYS_I2C_EEPROM_BUS

[Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>]

The current device model enabled eeprom code only works if
CONFIG_SYS_I2C_EEPROM_BUS is set.

This patch makes it work without that define so that the bus
number passed to 'eeprom_init' is used.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
---

Changes in v3:
- use eeprom_init() to set CONFIG_SYS_I2C_EEPROM_BUS, not
  i2c_set_bus_num to make things work with CONFIG_DM_I2C

Changes in v2: None

 cmd/eeprom.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/cmd/eeprom.c b/cmd/eeprom.c
index 6c29b33ba3..7b1f81477f 100644
--- a/cmd/eeprom.c
+++ b/cmd/eeprom.c
@@ -59,6 +59,10 @@
 #endif
 #endif
 
+#if defined(CONFIG_DM_I2C)
+int eeprom_i2c_bus;
+#endif
+
 __weak int eeprom_write_enable(unsigned dev_addr, int state)
 {
 	return 0;
@@ -67,7 +71,9 @@ __weak int eeprom_write_enable(unsigned dev_addr, int state)
 void eeprom_init(int bus)
 {
 	/* I2C EEPROM */
-#if defined(CONFIG_SYS_I2C)
+#if defined(CONFIG_DM_I2C)
+	eeprom_i2c_bus = bus;
+#elif defined(CONFIG_SYS_I2C)
 	if (bus >= 0)
 		i2c_set_bus_num(bus);
 	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
@@ -124,14 +130,14 @@ static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
 {
 	int ret = 0;
 
-#if defined(CONFIG_DM_I2C) && defined(CONFIG_SYS_I2C_EEPROM_BUS)
+#if defined(CONFIG_DM_I2C)
 	struct udevice *dev;
 
-	ret = i2c_get_chip_for_busnum(CONFIG_SYS_I2C_EEPROM_BUS, addr[0],
+	ret = i2c_get_chip_for_busnum(eeprom_i2c_bus, addr[0],
 				      alen - 1, &dev);
 	if (ret) {
 		printf("%s: Cannot find udev for a bus %d\n", __func__,
-		       CONFIG_SYS_I2C_EEPROM_BUS);
+		       eeprom_i2c_bus);
 		return CMD_RET_FAILURE;
 	}
 
@@ -141,15 +147,12 @@ static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen,
 		ret = dm_i2c_write(dev, offset, buffer, len);
 
 #else /* Non DM I2C support - will be removed */
-#if defined(CONFIG_SYS_I2C_EEPROM_BUS)
-	i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
-#endif
 
 	if (read)
 		ret = i2c_read(addr[0], offset, alen - 1, buffer, len);
 	else
 		ret = i2c_write(addr[0], offset, alen - 1, buffer, len);
-#endif /* CONFIG_DM_I2C && CONFIG_SYS_I2C_EEPROM_BUS */
+#endif /* CONFIG_DM_I2C */
 	if (ret)
 		ret = CMD_RET_FAILURE;
 
@@ -164,6 +167,10 @@ static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer,
 	int rcode = 0;
 	uchar addr[3];
 
+#if defined(CONFIG_SYS_I2C_EEPROM_BUS)
+	eeprom_init(CONFIG_SYS_I2C_EEPROM_BUS);
+#endif
+
 	while (offset < end) {
 		alen = eeprom_addr(dev_addr, offset, addr);
 
-- 
2.17.1