On Thu, Nov 22, 2012 at 20:17:26, Hiremath, Vaibhav wrote: > On Thu, Nov 22, 2012 at 17:46:50, Igor Mazanov wrote: > > On Thu, Nov 22, 2012 at 9:42 AM, Vaibhav Hiremath <hvaibhav@xxxxxx> wrote: > > > > > > > > > On 11/22/2012 1:30 AM, Igor Mazanov wrote: > > >> On Wed, Nov 21, 2012 at 9:38 PM, Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > >>> * Jean Pihet <jean.pihet@xxxxxxxxxxxxxx> [121114 08:43]: > > >>>> On Wed, Nov 14, 2012 at 4:28 PM, Igor Mazanov <i.mazanov@xxxxxxxxx> wrote: > > >>>>> > > >>>>> Beaglebone boot process is broken with the current git kernel. I use > > >>>>> omap2plus_defconfig for tests. > > >>>>> > > >>>>> It looks like the boot process stops due to the last changes in the AM33xx > > >>>>> clock sysbsystem. A following patch resolves this issue: > > >>> ... > > >>> > > >>>> The patch should change the name of the hwmod entry as well, can you > > >>>> fold this change in the current patch? > > >>> > > >>> Any news on updating this? > > >> > > >> The current kernel boots, but after a switching to CCF doesn't work > > >> the debugss - it's just disabled in the current hwmod code. So, it > > >> looks like we can't use JTAG to connect to the running kernel. > > >> > > > > > > just resumed from vacation... > > > > > > JTAG clock will get disabled because, CONFIG_OMAP_RESET_CLOCKS will > > > disable unused clocks, so as debugss clock. > > > > > > There is another thread started by Joel on the similar issue, > > > > > > http://www.mail-archive.com/linux-omap@xxxxxxxxxxxxxxx/msg80863.html > > > > > > Something below should be done for debugss on AM33xx, > > > > > > diff --git a/arch/arm/mach-omap2/clock33xx_data.c > > > b/arch/arm/mach-omap2/clock33xx_data.c > > > index 17e3de5..60e0b53 100644 > > > --- a/arch/arm/mach-omap2/clock33xx_data.c > > > +++ b/arch/arm/mach-omap2/clock33xx_data.c > > > @@ -584,6 +584,9 @@ static struct clk debugss_ick = { > > > .clkdm_name = "l3_aon_clkdm", > > > .parent = &dpll_core_m4_ck, > > > .ops = &clkops_omap2_dflt, > > > +#ifdef CONFIG_DEBUG_KERNEL > > > + .flags = ENABLE_ON_INIT, > > > +#endif > > > .enable_reg = AM33XX_CM_WKUP_DEBUGSS_CLKCTRL, > > > .enable_bit = AM33XX_MODULEMODE_SWCTRL, > > > .recalc = &followparent_recalc, > > > > Yes, I noticed this thread. But now a clock subsystem in the current > > kernel is switched to Common Clock Framework and debugss (and several > > another modules) is disabled > > Still this can be handled and enabled during init. > > > > (#if 0 .... #endif) in > > omap_hwmod_33xx_data.c. > > > > From omap_hwmod_33xx_data.c: > > > > /* > > * Modules omap_hwmod structures > > * > > * The following IPs are excluded for the moment because: > > * - They do not need an explicit SW control using omap_hwmod API. > > * - They still need to be validated with the driver > > * properly adapted to omap_hwmod / omap_device > > * > > * - cEFUSE (doesn't fall under any ocp_if) > > * - clkdiv32k > > * - debugss > > * - ocmc ram > > * - ocp watch point > > * - aes0 > > * - sha0 > > */ > > > > I uncommented the debugss entry in the omap_hwmod settings, but only > > got a warning like: > > > > CC arch/arm/mach-omap2/omap_hwmod_33xx_data.o > > arch/arm/mach-omap2/omap_hwmod_33xx_data.c:472:26: warning: > > 'am33xx_debugss_hwmod' defined but not used [-Wunused-variable] > > > > By the way, I need to use JTAG to trace a problem described in this thread: > > > > http://marc.info/?l=linux-omap&m=135307646415429&w=2 > > > > May be, it's the clocks related issue too... > > > > > I have quickly created patch for you, can you try below patch and let me > know? > > > > diff --git a/arch/arm/mach-omap2/cclock33xx_data.c b/arch/arm/mach-omap2/cclock33xx_data.c > index ea64ad6..c9af78c 100644 > --- a/arch/arm/mach-omap2/cclock33xx_data.c > +++ b/arch/arm/mach-omap2/cclock33xx_data.c > @@ -920,6 +920,7 @@ static const char *enable_init_clks[] = { > "l4hs_gclk", > "l4fw_gclk", > "l4ls_gclk", > + "debugss_ick", > }; > > int __init am33xx_clk_init(void) > diff --git a/arch/arm/mach-omap2/omap_hwmod_33xx_data.c b/arch/arm/mach-omap2/omap_hwmod_33xx_data.c > index ad8d43b..750b897 100644 > --- a/arch/arm/mach-omap2/omap_hwmod_33xx_data.c > +++ b/arch/arm/mach-omap2/omap_hwmod_33xx_data.c > @@ -460,27 +460,6 @@ static struct omap_hwmod am33xx_clkdiv32k_hwmod = { > }, > }; > > -/* > - * 'debugss' class > - * debug sub system > - */ > -static struct omap_hwmod_class am33xx_debugss_hwmod_class = { > - .name = "debugss", > -}; > - > -static struct omap_hwmod am33xx_debugss_hwmod = { > - .name = "debugss", > - .class = &am33xx_debugss_hwmod_class, > - .clkdm_name = "l3_aon_clkdm", > - .main_clk = "debugss_ick", > - .prcm = { > - .omap4 = { > - .clkctrl_offs = AM33XX_CM_WKUP_DEBUGSS_CLKCTRL_OFFSET, > - .modulemode = MODULEMODE_SWCTRL, > - }, > - }, > -}; > - > /* ocmcram */ > static struct omap_hwmod_class am33xx_ocmcram_hwmod_class = { > .name = "ocmcram", > @@ -570,6 +549,28 @@ static struct omap_hwmod am33xx_sha0_hwmod = { > > #endif > > +/* > + * 'debugss' class > + * debug sub system > + */ > +static struct omap_hwmod_class am33xx_debugss_hwmod_class = { > + .name = "debugss", > +}; > + > +static struct omap_hwmod am33xx_debugss_hwmod = { > + .name = "debugss", > + .class = &am33xx_debugss_hwmod_class, > + .clkdm_name = "l3_aon_clkdm", > + .main_clk = "debugss_ick", > + .flags = (HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET), > + .prcm = { > + .omap4 = { > + .clkctrl_offs = AM33XX_CM_WKUP_DEBUGSS_CLKCTRL_OFFSET, > + .modulemode = MODULEMODE_SWCTRL, > + }, > + }, > +}; > + > /* 'smartreflex' class */ > static struct omap_hwmod_class am33xx_smartreflex_hwmod_class = { > .name = "smartreflex", > @@ -2261,6 +2262,24 @@ static struct omap_hwmod_ocp_if am33xx_l3_main__gfx = { > .user = OCP_USER_MPU | OCP_USER_SDMA, > }; > > +/* l3_main -> debugss */ > +static struct omap_hwmod_addr_space am33xx_debugss_addrs[] = { > + { > + .pa_start = 0x4b000000, > + .pa_end = 0x4b000000 + SZ_16M - 1, > + .flags = ADDR_TYPE_RT > + }, > + { } > +}; > + > +static struct omap_hwmod_ocp_if am33xx_l3_main__debugss = { > + .master = &am33xx_l3_main_hwmod, > + .slave = &am33xx_debugss_hwmod, > + .clk = "debugss_ick", > + .addr = am33xx_debugss_addrs, > + .user = OCP_USER_MPU, > +}; > + > /* l4 wkup -> smartreflex0 */ > static struct omap_hwmod_addr_space am33xx_smartreflex0_addrs[] = { > { > @@ -3315,6 +3334,7 @@ static struct omap_hwmod_ocp_if *am33xx_hwmod_ocp_ifs[] __initdata = { > &am33xx_pruss__l3_main, > &am33xx_wkup_m3__l4_wkup, > &am33xx_gfx__l3_main, > + &am33xx_l3_main__debugss, > &am33xx_l4_wkup__wkup_m3, > &am33xx_l4_wkup__control, > &am33xx_l4_wkup__smartreflex0, > > Missed to mention that, I have boot tested it on Bone platform and made sure that debugs module stays enabled after boot (after applying this patch). Thanks, Vaibhav -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
