[PATCH 01/15] i2c: muxes: pca954x: add PCA9847 variant

Vladimir Oltean vladimir.oltean at nxp.com
Thu Dec 2 15:53:55 CET 2021


This seems to be very similar to the already existing PCA9547, save for
the fact that it supports 0.8V and doesn't support 5V. In fact, it is so
similar to the PCA9547 that the NXP LS1028A-RDB board has been driving
this chip using a "nxp,pca9547" compatible string.

Create a new compatible for the PCA9847 (which is the same as in Linux)
and define the same operating parameters for it as for PCA9547.

Cc: Heiko Schocher <hs at denx.de>
Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>
---
 drivers/i2c/muxes/pca954x.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/muxes/pca954x.c b/drivers/i2c/muxes/pca954x.c
index 55858cf653f2..0034dfbf6daf 100644
--- a/drivers/i2c/muxes/pca954x.c
+++ b/drivers/i2c/muxes/pca954x.c
@@ -23,7 +23,8 @@ enum pca_type {
 	PCA9546,
 	PCA9547,
 	PCA9548,
-	PCA9646
+	PCA9646,
+	PCA9847,
 };
 
 struct chip_desc {
@@ -68,6 +69,11 @@ static const struct chip_desc chips[] = {
 		.muxtype = pca954x_isswi,
 		.width = 4,
 	},
+	[PCA9847] = {
+		.enable = 0x8,
+		.muxtype = pca954x_ismux,
+		.width = 8,
+	},
 };
 
 static int pca954x_deselect(struct udevice *mux, struct udevice *bus,
@@ -106,6 +112,7 @@ static const struct udevice_id pca954x_ids[] = {
 	{ .compatible = "nxp,pca9547", .data = PCA9547 },
 	{ .compatible = "nxp,pca9548", .data = PCA9548 },
 	{ .compatible = "nxp,pca9646", .data = PCA9646 },
+	{ .compatible = "nxp,pca9847", .data = PCA9847 },
 	{ }
 };
 
-- 
2.25.1



More information about the U-Boot mailing list