From c649dda537a1a585e51066169e6fdb67e2b8f59e Mon Sep 17 00:00:00 2001 From: Stefan Bigler Date: Fri, 8 Apr 2011 16:24:08 +0200 Subject: i2c: add i2c deblock sequence before and after every mux config To make sure that the mux can be configured a deblocking sequence is done before the mux configuration. After the mux switch the new leaf of, the i2c tree must be again deblocked. Signed-off-by: Stefan Bigler Acked-by: Heiko Schocher cc: Wolfgang Denk cc: Detlev Zundel cc: Prafulla Wadaskar cc: Valentin Longchamp cc: Holger Brunck Signed-off-by: Valentin Longchamp --- common/cmd_i2c.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'common') diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index c272b0dd4f..d913e13665 100644 --- a/common/cmd_i2c.c +++ b/common/cmd_i2c.c @@ -132,6 +132,14 @@ DECLARE_GLOBAL_DATA_PTR; #define DISP_LINE_LEN 16 +/* implement possible board specific board init */ +void __def_i2c_init_board(void) +{ + return; +} +void i2c_init_board(void) + __attribute__((weak, alias("__def_i2c_init_board"))); + /* TODO: Implement architecture-specific get/set functions */ unsigned int __def_i2c_get_bus_speed(void) { @@ -1541,6 +1549,8 @@ int i2x_mux_select_mux(int bus) mux = dev->mux; while (mux != NULL) { + /* do deblocking on each level of mux, before mux config */ + i2c_init_board(); if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) { printf ("Error setting Mux: chip:%x channel: \ %x\n", mux->chip, mux->channel); @@ -1548,6 +1558,8 @@ int i2x_mux_select_mux(int bus) } mux = mux->next; } + /* do deblocking on each level of mux and after mux config */ + i2c_init_board(); return 0; } #endif /* CONFIG_I2C_MUX */ -- cgit v1.2.1