[PATCH] i2c: add pmic_reg_read() for PBL use
Bastian Krause
bst at pengutronix.de
Tue Dec 19 08:11:35 PST 2023
Add a common PMIC read function to PBL which allows easy porting of
U-Boot's pmic_reg_read() in lowlevel board code.
Signed-off-by: Bastian Krause <bst at pengutronix.de>
---
include/pbl/pmic.h | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/include/pbl/pmic.h b/include/pbl/pmic.h
index 0f882c5649d..bd0583370ec 100644
--- a/include/pbl/pmic.h
+++ b/include/pbl/pmic.h
@@ -9,6 +9,27 @@ struct pmic_config {
u8 val;
};
+static void pmic_reg_read(struct pbl_i2c *i2c, int addr, u8 reg, void *buf)
+{
+ int ret;
+ struct i2c_msg msg[] = {
+ {
+ .addr = addr,
+ .buf = ®,
+ .len = 1,
+ }, {
+ .addr = addr,
+ .flags = I2C_M_RD,
+ .buf = buf,
+ .len = 1,
+ },
+ };
+
+ ret = pbl_i2c_xfer(i2c, msg, ARRAY_SIZE(msg));
+ if (ret != ARRAY_SIZE(msg))
+ pr_err("Failed to read from pmic@%x: %d\n", addr, ret);
+}
+
static void pmic_reg_write(struct pbl_i2c *i2c, int addr, u8 reg, u8 val)
{
int ret;
--
2.39.2
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