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authorAlbert ARIBAUD \\(3ADEV\\) <albert.aribaud@3adev.fr>2015-09-21 22:43:38 +0200
committerStefano Babic <sbabic@denx.de>2015-10-02 10:42:31 +0200
commit03544c6640e8a969f8409eac637f4780e1eabb1d (patch)
treebe3b0017419c55a9f81fd1058673b85646baafca /README
parent3f353ceccbbb25315cf7591f59f8dbd853b657e4 (diff)
downloadtalos-obmc-uboot-03544c6640e8a969f8409eac637f4780e1eabb1d.zip
talos-obmc-uboot-03544c6640e8a969f8409eac637f4780e1eabb1d.tar.gz
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) <albert.aribaud@3adev.fr>
Diffstat (limited to 'README')
-rw-r--r--README8
1 files changed, 6 insertions, 2 deletions
diff --git a/README b/README
index a13705a..c22b60b 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
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