ARM: tegra: Remove flow controller programming

This particular code had no effect on WFI execution. It only
asserts/de-asserts signal to tegra "legacy" CPU idle stats
monitor, which we are no longer using (cpufreq is based on
kernel s/w idle stats instead).

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index d83a8c0..566e2f8 100644 (file)
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/arch/arm/mach-tegra/cpuidle.c
@@ -27,9 +27,9 @@
 #include <linux/cpuidle.h>
 #include <linux/hrtimer.h>
 
-#include <mach/iomap.h>
+#include <asm/proc-fns.h>
 
-extern void tegra_cpu_wfi(void);
+#include <mach/iomap.h>
 
 static int tegra_idle_enter_lp3(struct cpuidle_device *dev,
                                struct cpuidle_driver *drv, int index);
@@ -64,7 +64,7 @@ static int tegra_idle_enter_lp3(struct cpuidle_device *dev,
 
        enter = ktime_get();
 
-       tegra_cpu_wfi();
+       cpu_do_idle();
 
        exit = ktime_sub(ktime_get(), enter);
        us = ktime_to_us(exit);

diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S
index 5b20197..d29b156 100644 (file)
--- a/arch/arm/mach-tegra/sleep.S
+++ b/arch/arm/mach-tegra/sleep.S
@@ -62,32 +62,3 @@
        movw    \reg, #:lower16:\val
        movt    \reg, #:upper16:\val
 .endm
-
-/*
- * tegra_cpu_wfi
- *
- * puts current CPU in clock-gated wfi using the flow controller
- *
- * corrupts r0-r3
- * must be called with MMU on
- */
-
-ENTRY(tegra_cpu_wfi)
-       cpu_id  r0
-       cpu_to_halt_reg r1, r0
-       cpu_to_csr_reg r2, r0
-       mov32   r0, TEGRA_FLOW_CTRL_VIRT
-       mov     r3, #FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG
-       str     r3, [r0, r2]    @ clear event & interrupt status
-       mov     r3, #FLOW_CTRL_WAIT_FOR_INTERRUPT | FLOW_CTRL_JTAG_RESUME
-       str     r3, [r0, r1]    @ put flow controller in wait irq mode
-       dsb
-       wfi
-       mov     r3, #0
-       str     r3, [r0, r1]    @ clear flow controller halt status
-       mov     r3, #FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG
-       str     r3, [r0, r2]    @ clear event & interrupt status
-       dsb
-       mov     pc, lr
-ENDPROC(tegra_cpu_wfi)
-