Add a small helper to read a single page of EEPROM data.
Signed-off-by: Marc Kleine-Budde <[email protected]>
---
include/pbl/eeprom.h | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/include/pbl/eeprom.h b/include/pbl/eeprom.h
new file mode 100644
index 000000000000..df868b1a37fb
--- /dev/null
+++ b/include/pbl/eeprom.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PBL_EEPROM_H_
+#define __PBL_EEPROM_H_
+
+#include <common.h>
+#include <pbl/i2c.h>
+
+static inline void eeprom_read(struct pbl_i2c *i2c, u16 client_addr, u32 addr,
void *buf, u16 count)
+{
+ u8 msgbuf[2];
+ struct i2c_msg msg[] = {
+ {
+ .addr = client_addr,
+ .buf = msgbuf,
+ }, {
+ .addr = client_addr,
+ .flags = I2C_M_RD,
+ .buf = buf,
+ .len = count,
+ },
+ };
+ int ret, i = 0;
+
+ if (addr & I2C_ADDR_16_BIT)
+ msgbuf[i++] = addr >> 8;
+ msgbuf[i++] = addr;
+ msg[0].len = i;
+
+ ret = pbl_i2c_xfer(i2c, msg, ARRAY_SIZE(msg));
+ if (ret != ARRAY_SIZE(msg))
+ pr_err("Failed to read from eeprom@%x: %d\n", client_addr, ret);
+}
+
+#endif
--
2.40.1
