Hi
the references below are from SPRUHL7
On Fri, 23 Jan 2015, Felipe Balbi wrote:
> Without hwmod data for DebugSS, performance monitors
> have no chance of running on AM43xx devices.
>
> Signed-off-by: Felipe Balbi <balbi@xxxxxx>
> ---
> arch/arm/mach-omap2/omap_hwmod_43xx_data.c | 40 ++++++++++++++++++++++++++++++
> arch/arm/mach-omap2/prcm43xx.h | 1 +
> 2 files changed, 41 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/omap_hwmod_43xx_data.c b/arch/arm/mach-omap2/omap_hwmod_43xx_data.c
> index 5c6c8410160e..6709704dd5b5 100644
> --- a/arch/arm/mach-omap2/omap_hwmod_43xx_data.c
> +++ b/arch/arm/mach-omap2/omap_hwmod_43xx_data.c
> @@ -19,6 +19,7 @@
> #include "omap_hwmod.h"
> #include "omap_hwmod_33xx_43xx_common_data.h"
> #include "prcm43xx.h"
> +#include "prm44xx.h"
> #include "omap_hwmod_common_data.h"
>
>
> @@ -60,6 +61,44 @@ static struct omap_hwmod am43xx_wkup_m3_hwmod = {
> .rst_lines_cnt = ARRAY_SIZE(am33xx_wkup_m3_resets),
> };
>
> +/*
> + * 'debugss' class
> + * debug and emulation sub system
> + */
> +static struct omap_hwmod_opt_clk am43xx_debugss_opt_clks[] = {
> + { .role = "dbg_sysclk", .clk = "dbg_sysclk_ck" },
> + { .role = "dbg_clka", .clk = "dbg_clka_ck", },
> + { .role = "dbg_clkb", .clk = "dbg_clkb_ck", },
> + { .role = "dbg_clkc", .clk = "dbg_clkc_ck", },
> +};
> +
> +static struct omap_hwmod_class am43xx_debugss_hwmod_class = {
> + .name = "debugss",
> +};
> +
> +/* debugss */
> +static struct omap_hwmod am43xx_debugss_hwmod = {
> + .name = "debugss",
> + .class = &am43xx_debugss_hwmod_class,
> + .clkdm_name = "l3_aon_clkdm",
> + .main_clk = "trace_clk_div_ck",
> + .prcm = {
> + .omap4 = {
> + .clkctrl_offs = AM43XX_CM_WKUP_DBGSS_CLKCTRL_OFFSET,
According to Table 6-275 "PRCM_CM_WKUP_DBGSS_CLKCTRL Register Field
Descriptions" this should have a
.modulemode = MODULEMODE_SWCTRL,
> + },
> + },
> + .opt_clks = am43xx_debugss_opt_clks,
> + .opt_clks_cnt = ARRAY_SIZE(am43xx_debugss_opt_clks),
> +};
> +
> +/* debugss -> l3_main_2 */
> +static struct omap_hwmod_ocp_if am43xx_debugss__l3_main = {
> + .master = &am43xx_debugss_hwmod,
> + .slave = &am33xx_l3_main_hwmod,
> + .clk = "sys_clkin_ck",
> + .user = OCP_USER_MPU | OCP_USER_SDMA,
> +};
> +
According to Table 31-25 "Debug Modules Memory Mapping" there are a few
initiator ports on the DEBUGSS that are connected to various slave ports
on various chip-wide interconnects: L3_EMU, L4_PER, L4_WAKEUP, L4_CFG. I
would suggest starting by adding at least one of them as a struct
omap_hwmod_ocp_if record. The one attached to L3_EMU would seem like a
good one to start with.
> diff --git a/arch/arm/mach-omap2/prcm43xx.h b/arch/arm/mach-omap2/prcm43xx.h
> index ad7b3e9977f8..bb42cd80526d 100644
> --- a/arch/arm/mach-omap2/prcm43xx.h
> +++ b/arch/arm/mach-omap2/prcm43xx.h
> @@ -93,6 +93,7 @@
> #define AM43XX_CM_PER_TIMER5_CLKCTRL_OFFSET 0x0548
> #define AM43XX_CM_PER_TIMER6_CLKCTRL_OFFSET 0x0550
> #define AM43XX_CM_PER_TIMER7_CLKCTRL_OFFSET 0x0558
> +#define AM43XX_CM_WKUP_DBGSS_CLKCTRL_OFFSET 0x0020
> #define AM43XX_CM_WKUP_WKUP_M3_CLKCTRL_OFFSET 0x0228
> #define AM43XX_CM_WKUP_CONTROL_CLKCTRL_OFFSET 0x0360
> #define AM43XX_CM_WKUP_SMARTREFLEX0_CLKCTRL_OFFSET 0x0350
> --
> 2.3.0-rc1
- Paul
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