From e66587495d75ad82c34e9f04af03d3c5741644d3 Mon Sep 17 00:00:00 2001
From: Michael Burr <michael.burr@logicpd.com>
Date: Mon, 23 Sep 2013 22:35:45 +0000
Subject: [PATCH] i2c: Zynq: Support for TI PCA9548 bus multiplexer
(Interface is not quite the same as Phillips PCA9547.)
Signed-off-by: Michael Burr <michael.burr@logicpd.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Michal Simek <monstr@monstr.eu>
---
drivers/i2c/i2c_core.c | 5 +++++
include/i2c.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/drivers/i2c/i2c_core.c b/drivers/i2c/i2c_core.c
index d1072e819b..b263562edf 100644
--- a/drivers/i2c/i2c_core.c
+++ b/drivers/i2c/i2c_core.c
@@ -138,6 +138,11 @@ static int i2c_mux_set(struct i2c_adapter *adap, int mux_id, int chip,
return -1;
buf = (uint8_t)((channel & 0x07) | (1 << 3));
break;
+ case I2C_MUX_PCA9548_ID:
+ if (channel > 7)
+ return -1;
+ buf = (uint8_t)(0x01 << channel);
+ break;
default:
printf("%s: wrong mux id: %d\n", __func__, mux_id);
return -1;
diff --git a/include/i2c.h b/include/i2c.h
index 8fd17d190a..c1be533d57 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -135,6 +135,8 @@ extern struct i2c_bus_hose i2c_bus[];
#define I2C_MUX_PCA9544 {I2C_MUX_PCA9544_ID, "PCA9544A"}
#define I2C_MUX_PCA9547_ID 4
#define I2C_MUX_PCA9547 {I2C_MUX_PCA9547_ID, "PCA9547A"}
+#define I2C_MUX_PCA9548_ID 5
+#define I2C_MUX_PCA9548 {I2C_MUX_PCA9548_ID, "PCA9548"}
#endif
#ifndef I2C_SOFT_DECLARATIONS
--
2.39.5