From: Stefan Bigler <stefan.big...@keymile.com> 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 <stefan.big...@keymile.com> Acked-by: Heiko Schocher <h...@denx.de> cc: Wolfgang Denk <w...@denx.de> cc: Detlev Zundel <d...@denx.de> cc: Prafulla Wadaskar <prafu...@marvell.com> cc: Valentin Longchamp <valentin.longch...@keymile.com> cc: Holger Brunck <holger.bru...@keymile.com> Signed-off-by: Valentin Longchamp <valentin.longch...@keymile.com> --- common/cmd_i2c.c | 12 ++++++++++++ include/i2c.h | 2 -- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index c272b0d..d913e13 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 */ diff --git a/include/i2c.h b/include/i2c.h index cd23c8a..8ceb4c8 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -108,9 +108,7 @@ * repeatedly to change the speed and slave addresses. */ void i2c_init(int speed, int slaveaddr); -#ifdef CONFIG_SYS_I2C_INIT_BOARD void i2c_init_board(void); -#endif #ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT void i2c_board_late_init(void); #endif -- 1.7.0.5 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot