leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

i2c: mxc: add fuse check

Browse Source 
Add fuse check for I2C. If the fuse indicates the module
will not work in the SoC, let's fail the initialization.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2020-05-01 22:08:35 +08:00 committed by Stefano Babic
parent 3c42c0f673
commit 7d1ee741d1
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/i2c/mxc_i2c.c
View File

@ -19,6 +19,7 @@
#include <dm/device_compat.h>
#include <linux/errno.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <asm/mach-imx/sys_proto.h>
#include <asm/io.h>
#include <i2c.h>
#include <watchdog.h>
@ -747,6 +748,14 @@ void bus_i2c_init(int index, int speed, int unused,
return;
}
if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
if (i2c_fused((ulong)mxc_i2c_buses[index].base)) {
printf("SoC fuse indicates I2C@0x%lx is unavailable.\n",
(ulong)mxc_i2c_buses[index].base);
return;
}
}
/*
* Warning: Be careful to allow the assignment to a static
* variable here. This function could be called while U-Boot is
@ -892,6 +901,14 @@ static int mxc_i2c_probe(struct udevice *bus)
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
if (i2c_fused((ulong)addr)) {
printf("SoC fuse indicates I2C@0x%lx is unavailable.\n",
(ulong)addr);
return -ENODEV;
}
}
i2c_bus->base = addr;
i2c_bus->index = bus->seq;
i2c_bus->bus = bus;