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i2c: Zynq: Support for TI PCA9548 bus multiplexer

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(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>
This commit is contained in:
Michael Burr 2013-09-23 22:35:45 +00:00 committed by Heiko Schocher
parent b089d039b1
commit e66587495d
2 changed files with 7 additions and 0 deletions
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5
drivers/i2c/i2c_core.c
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@ -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;

2
include/i2c.h
View file

@ -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