ARM: OMAP3: hwmod data: Don't prevent RESET of USB Host module
authorRoger Quadros <rogerq@ti.com>
Mon, 9 Dec 2013 01:39:02 +0000 (18:39 -0700)
committerPaul Walmsley <paul@pwsan.com>
Mon, 9 Dec 2013 18:51:29 +0000 (11:51 -0700)
Unlike what the comment states, errata i660 does not state that we
can't RESET the USB host module. Instead it states that RESET is the
only way to recover from a deadlock situation.

RESET ensures that the module is in a known good state irrespective
of what bootloader does with the module, so it must be done at boot.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com> # Panda, BeagleXM
Fixes: de231388cb80 ("ARM: OMAP: USB: EHCI and OHCI hwmod structures for OMAP3")
Signed-off-by: Paul Walmsley <paul@pwsan.com>
arch/arm/mach-omap2/omap_hwmod_3xxx_data.c

index 9e56fabd7fa3b834fbe09a463facd521592107a7..d33742908f970a21b24c2cefeef03799d3d84532 100644 (file)
@@ -1943,7 +1943,8 @@ static struct omap_hwmod_class_sysconfig omap3xxx_usb_host_hs_sysc = {
        .syss_offs      = 0x0014,
        .sysc_flags     = (SYSC_HAS_MIDLEMODE | SYSC_HAS_CLOCKACTIVITY |
                           SYSC_HAS_SIDLEMODE | SYSC_HAS_ENAWAKEUP |
-                          SYSC_HAS_SOFTRESET | SYSC_HAS_AUTOIDLE),
+                          SYSC_HAS_SOFTRESET | SYSC_HAS_AUTOIDLE |
+                          SYSS_HAS_RESET_STATUS),
        .idlemodes      = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
                           MSTANDBY_FORCE | MSTANDBY_NO | MSTANDBY_SMART),
        .sysc_fields    = &omap_hwmod_sysc_type1,
@@ -2021,15 +2022,7 @@ static struct omap_hwmod omap3xxx_usb_host_hs_hwmod = {
         * hence HWMOD_SWSUP_MSTANDBY
         */
 
-       /*
-        * During system boot; If the hwmod framework resets the module
-        * the module will have smart idle settings; which can lead to deadlock
-        * (above Errata Id:i660); so, dont reset the module during boot;
-        * Use HWMOD_INIT_NO_RESET.
-        */
-
-       .flags          = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY |
-                         HWMOD_INIT_NO_RESET,
+       .flags          = HWMOD_SWSUP_SIDLE | HWMOD_SWSUP_MSTANDBY,
 };
 
 /*