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authorPaul Walmsley <paul@pwsan.com>2012-06-17 11:57:53 -0600
committerPaul Walmsley <paul@pwsan.com>2012-06-21 18:08:47 -0600
commitb8f15b7e1dd3638d35cfff85571df1d7ea96e35e (patch)
tree34c0db4df59886dbbeaab9d10fd90d49acd47f51 /arch
parent9a47d32d5c4b91a4ce4c459f3b7b0290185e7578 (diff)
downloadlinux-b8f15b7e1dd3638d35cfff85571df1d7ea96e35e.tar.bz2
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-omap2/cm.h11
-rw-r--r--arch/arm/mach-omap2/cminst44xx.c4
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;
}
/**