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authorMichael Burr <michael.burr@logicpd.com>2013-09-23 22:35:45 +0000
committerHeiko Schocher <hs@denx.de>2013-10-17 07:20:25 +0200
commite66587495d75ad82c34e9f04af03d3c5741644d3 (patch)
tree1d85f260218908d96c9fc6ed0f4e3ab4ae019db4
parentb089d039b1971fc3abfe1d9bcebd0d35245fb110 (diff)
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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>
-rw-r--r--drivers/i2c/i2c_core.c5
-rw-r--r--include/i2c.h2
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i2c/i2c_core.c b/drivers/i2c/i2c_core.c
index d1072e8..b263562 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 8fd17d1..c1be533 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