[PATCH] ARM: OMAP2+: am33xx: preserve JTAG clock aka debugss_ick.
Andreas Fenkart
andreas.fenkart at streamunlimited.com
Thu Mar 7 08:13:27 EST 2013
This fixes JTAG support on am33xx.
Signed-off-by: Andreas Fenkart <andreas.fenkart at streamunlimited.com>
---
arch/arm/Kconfig.debug | 6 ++++++
arch/arm/mach-omap2/cclock33xx_data.c | 11 ++++++++---
2 files changed, 14 insertions(+), 3 deletions(-)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index acdddda..8120940 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -632,4 +632,10 @@ config PID_IN_CONTEXTIDR
additional instructions during context switch. Say Y here only if you
are planning to use hardware trace tools with this kernel.
+config JTAG
+ bool "Enable JTAG clock"
+ depends on SOC_AM33XX
+ help
+ Enable or keep JTAG clock enabled
+
endmenu
diff --git a/arch/arm/mach-omap2/cclock33xx_data.c b/arch/arm/mach-omap2/cclock33xx_data.c
index 476b820..b7470de 100644
--- a/arch/arm/mach-omap2/cclock33xx_data.c
+++ b/arch/arm/mach-omap2/cclock33xx_data.c
@@ -429,9 +429,14 @@ DEFINE_STRUCT_CLK(smartreflex1_fck, dpll_core_ck_parents, clk_ops_null);
* - usbotg_fck (its additional clock and not really a modulemode)
* - ieee5000
*/
-DEFINE_CLK_GATE(debugss_ick, "dpll_core_m4_ck", &dpll_core_m4_ck, 0x0,
- AM33XX_CM_WKUP_DEBUGSS_CLKCTRL, AM33XX_MODULEMODE_SWCTRL_SHIFT,
- 0x0, NULL);
+#ifdef CONFIG_JTAG
+#define DEBUGSS_FLAGS CLK_IGNORE_UNUSED
+#else
+#define DEBUGSS_FLAGS 0x0
+#endif
+DEFINE_CLK_GATE(debugss_ick, "dpll_core_m4_ck", &dpll_core_m4_ck,
+ DEBUGSS_FLAGS, AM33XX_CM_WKUP_DEBUGSS_CLKCTRL,
+ AM33XX_MODULEMODE_SWCTRL_SHIFT, 0x0, NULL);
DEFINE_CLK_GATE(mmu_fck, "dpll_core_m4_ck", &dpll_core_m4_ck, 0x0,
AM33XX_CM_GFX_MMUDATA_CLKCTRL, AM33XX_MODULEMODE_SWCTRL_SHIFT,
--
1.7.10.4
More information about the linux-arm-kernel
mailing list