[PATCH 1/6] board: phytec: common: Move eeprom read to new function

[Daniel Schultz <d.schultz@phytec.de>]

We need to read multiple times from different offsets in API v3.
Move the EEPROM read logic into a dedicated function to make it
usable multiple times.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
---
 board/phytec/common/phytec_som_detection.c | 38 ++++++++++++++--------
 1 file changed, 24 insertions(+), 14 deletions(-)

diff --git a/board/phytec/common/phytec_som_detection.c b/board/phytec/common/phytec_som_detection.c
index b14bb3dbb7f..a089fe9bc90 100644
--- a/board/phytec/common/phytec_som_detection.c
+++ b/board/phytec/common/phytec_som_detection.c
@@ -47,16 +47,9 @@ int phytec_eeprom_data_setup(struct phytec_eeprom_data *data,
 	return ret;
 }
 
-int phytec_eeprom_data_init(struct phytec_eeprom_data *data,
-			    int bus_num, int addr)
+int phytec_eeprom_read(u8 *data, int bus_num, int addr, int size, int offset)
 {
-	int ret, i;
-	unsigned int crc;
-	u8 *ptr;
-	const unsigned int payload_size = sizeof(struct phytec_eeprom_payload);
-
-	if (!data)
-		data = &eeprom_data;
+	int ret;
 
 #if CONFIG_IS_ENABLED(DM_I2C)
 	struct udevice *dev;
@@ -64,19 +57,36 @@ int phytec_eeprom_data_init(struct phytec_eeprom_data *data,
 	ret = i2c_get_chip_for_busnum(bus_num, addr, 2, &dev);
 	if (ret) {
 		pr_err("%s: i2c EEPROM not found: %i.\n", __func__, ret);
-		goto err;
+		return ret;
 	}
 
-	ret = dm_i2c_read(dev, 0, (uint8_t *)data, payload_size);
+	ret = dm_i2c_read(dev, offset, (uint8_t *)data, size);
 	if (ret) {
 		pr_err("%s: Unable to read EEPROM data: %i\n", __func__, ret);
-		goto err;
+		return ret;
 	}
 #else
 	i2c_set_bus_num(bus_num);
-	ret = i2c_read(addr, 0, 2, (uint8_t *)data,
-		       sizeof(struct phytec_eeprom_data));
+	ret = i2c_read(addr, offset, 2, (uint8_t *)data, size);
 #endif
+	return ret;
+}
+
+int phytec_eeprom_data_init(struct phytec_eeprom_data *data,
+			    int bus_num, int addr)
+{
+	int ret, i;
+	unsigned int crc;
+	u8 *ptr;
+	const unsigned int payload_size = sizeof(struct phytec_eeprom_payload);
+
+	if (!data)
+		data = &eeprom_data;
+
+	ret = phytec_eeprom_read((u8 *)data, bus_num, addr,
+				 payload_size, 0);
+	if (ret)
+		goto err;
 
 	if (data->payload.api_rev == 0xff) {
 		pr_err("%s: EEPROM is not flashed. Prototype?\n", __func__);
-- 
2.25.1