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| author | Paul Walmsley <paul@pwsan.com> | 2012-06-17 11:57:53 -0600 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2012-06-21 18:08:47 -0600 |
| commit | b8f15b7e1dd3638d35cfff85571df1d7ea96e35e (patch) | |
| tree | 34c0db4df59886dbbeaab9d10fd90d49acd47f51 | |
| parent | 9a47d32d5c4b91a4ce4c459f3b7b0290185e7578 (diff) | |
| download | linux-b8f15b7e1dd3638d35cfff85571df1d7ea96e35e.tar.gz linux-b8f15b7e1dd3638d35cfff85571df1d7ea96e35e.tar.bz2 linux-b8f15b7e1dd3638d35cfff85571df1d7ea96e35e.zip | |
ARM: OMAP2+: CM: increase the module disable timeout
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>
| -rw-r--r-- | arch/arm/mach-omap2/cm.h | 11 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cminst44xx.c | 4 |
2 files changed, 13 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/cm.h b/arch/arm/mach-omap2/cm.h index a7bc096bd407..f24e3f7a2bbc 100644 --- a/arch/arm/mach-omap2/cm.h +++ b/arch/arm/mach-omap2/cm.h @@ -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 diff --git a/arch/arm/mach-omap2/cminst44xx.c b/arch/arm/mach-omap2/cminst44xx.c index 8c86d294b1a3..1a39945d9ff8 100644 --- a/arch/arm/mach-omap2/cminst44xx.c +++ b/arch/arm/mach-omap2/cminst44xx.c @@ -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; } /** |