arch/arm/mach-omap2/omap_hwmod.c: line 1845
/**
* _omap4_disable_module - enable CLKCTRL modulemode on OMAP4
* @oh: struct omap_hwmod *
*
* Disable the PRCM module mode related to the hwmod @oh.
* Return EINVAL if the modulemode is not supported and 0 in case of
success.
*/
static int _omap4_disable_module(struct omap_hwmod *oh)
{
int v;
if (!oh->clkdm || !oh->prcm.omap4.modulemode)
return -EINVAL;
/*
* Since integration code might still be doing something, only
* disable if all lines are under hardreset.
*/
if (_are_any_hardreset_lines_asserted(oh))
return 0;
pr_debug("omap_hwmod: %s: %s\n", oh->name, __func__);
omap_cm_module_disable(oh->clkdm->prcm_partition, oh->clkdm->cm_inst,
oh->prcm.omap4.clkctrl_offs);
v = _omap4_wait_target_disable(oh);
if (v)
pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
oh->name);
return 0;
}
在 2018年8月14日星期二 UTC+8下午3:27:31，ezio H写道：
>
> Link on ti e2e: https://e2e.ti.com/support/arm/sitara_arm/f/791/t/710355.
> bb_x15 's DCAM1 don't work on either *ubuntu-16.04.3-minimal-armhf-2017-10-10
>
> * or TI's Arogo
> On Arogo,I use:
>
> root@am57xx-evm:~# canconfig can0 bitrate 50000 ctrlmode triple-samplin
> [ 757.361582] omap_hwmod: dcan1: _wait_target_disable failed
> can0 bitrate: 50000, sample-point: 0.875
> [ 757.376837] omap_hwmod: dcan1: _wait_target_disable failed
> can0 ctrlmode: loopback[OFF], listen-only[OFF],
> tripple-sampling[ON],one-shot[OFF], berr-reporting[OFF]
> root@am57xx-evm:~# ifconfig can0 up
>
>
> And everything about CAN looks good
>
> root@am57xx-evm:~# lsmod | grep can
> can_raw 6589 2
> can 29904 1 can_raw
> c_can_platform 6638 0
> c_can 9718 1 c_can_platform
> can_dev 12397 1 c_can
>
> root@am57xx-evm:~# cat /proc/device-tree/ocp/can\@481cc000/status
> okay
>
>
>
>
> Except: omap_hwmod: dcan1: _wait_target_disable failed.
> What should I do with this error messagge
>
>
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