From 03544c6640e8a969f8409eac637f4780e1eabb1d Mon Sep 17 00:00:00 2001 From: "Albert ARIBAUD \\\\(3ADEV\\\\)" Date: Mon, 21 Sep 2015 22:43:38 +0200 Subject: I2C: mxc_i2c: make I2C1 and I2C2 optional The driver assumed that I2C1 and I2C2 were always enabled, and if they were not, then an asynchronous abort was (silently) raised, to be caught much later on in the Linux kernel. Fix this by making I2C1 and I2C2 optional just like I2C3 and I2C4 are. To make the change binary-invariant, declare I2C1 and I2C2 in every include/configs/ file which defines CONFIG_SYS_I2C_MXC. Also, while updating README about CONFIG_SYS_I2C_MXC_I2C1 and CONFIG_SYS_I2C_MXC_I2C2, add missing descriptions for I2C4 speed (CONFIG_SYS_MXC_I2C4_SPEED) and slave (CONFIG_SYS_MXC_I2C4_SLAVE) config options. Signed-off-by: Albert ARIBAUD (3ADEV) --- README | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'README') diff --git a/README b/README index a13705ae7a..c22b60b49b 100644 --- a/README +++ b/README @@ -2359,16 +2359,20 @@ CBFS (Coreboot Filesystem) support - drivers/i2c/i2c_mxc.c - activate this driver with CONFIG_SYS_I2C_MXC + - enable bus 1 with CONFIG_SYS_I2C_MXC_I2C1 + - enable bus 2 with CONFIG_SYS_I2C_MXC_I2C2 + - enable bus 3 with CONFIG_SYS_I2C_MXC_I2C3 + - enable bus 4 with CONFIG_SYS_I2C_MXC_I2C4 - define speed for bus 1 with CONFIG_SYS_MXC_I2C1_SPEED - define slave for bus 1 with CONFIG_SYS_MXC_I2C1_SLAVE - define speed for bus 2 with CONFIG_SYS_MXC_I2C2_SPEED - define slave for bus 2 with CONFIG_SYS_MXC_I2C2_SLAVE - define speed for bus 3 with CONFIG_SYS_MXC_I2C3_SPEED - define slave for bus 3 with CONFIG_SYS_MXC_I2C3_SLAVE + - define speed for bus 4 with CONFIG_SYS_MXC_I2C4_SPEED + - define slave for bus 4 with CONFIG_SYS_MXC_I2C4_SLAVE If those defines are not set, default value is 100000 for speed, and 0 for slave. - - enable bus 3 with CONFIG_SYS_I2C_MXC_I2C3 - - enable bus 4 with CONFIG_SYS_I2C_MXC_I2C4 - drivers/i2c/rcar_i2c.c: - activate this driver with CONFIG_SYS_I2C_RCAR -- cgit v1.2.1