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ARM: OMAP2+: CM: increase the module disable timeout

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Increase the timeout for disabling an IP block to five milliseconds.
This is to handle the usb_host_fs idle latency, which takes almost
four milliseconds after a host controller reset.

This is the second of two patches needed to resolve the following
boot warning:

omap_hwmod: usb_host_fs: _wait_target_disable failed

Thanks to Sergei Shtylyov <sshtylyov@mvista.com> for finding
an unrelated hunk in a previous version of this patch.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Sergei Shtylyov <sshtylyov@mvista.com>
Cc: Tero Kristo <t-kristo@ti.com>
This commit is contained in:
Paul Walmsley 2012-06-17 11:57:53 -06:00
parent 9a47d32d5c
commit b8f15b7e1d
2 changed files with 13 additions and 2 deletions
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11
arch/arm/mach-omap2/cm.h
View File

@ -22,4 +22,15 @@
*/
#define MAX_MODULE_READY_TIME 2000
/*
* MAX_MODULE_DISABLE_TIME: max duration in microseconds to wait for
* the PRCM to request that a module enter the inactive state in the
* case of OMAP2 & 3. In the case of OMAP4 this is the max duration
* in microseconds for the module to reach the inactive state from
* a functional state.
* XXX FSUSB on OMAP4430 takes ~4ms to idle after reset during
* kernel init.
*/
#define MAX_MODULE_DISABLE_TIME 5000
#endif

4
arch/arm/mach-omap2/cminst44xx.c
View File

@ -313,9 +313,9 @@ int omap4_cminst_wait_module_idle(u8 part, u16 inst, s16 cdoffs, u16 clkctrl_off
omap_test_timeout((_clkctrl_idlest(part, inst, cdoffs, clkctrl_offs) ==
CLKCTRL_IDLEST_DISABLED),
MAX_MODULE_READY_TIME, i);
MAX_MODULE_DISABLE_TIME, i);
return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
return (i < MAX_MODULE_DISABLE_TIME) ? 0 : -EBUSY;
}
/**