ARM: at91/pm_slowclock: remove the unused code related with SLOWDOWN_MASTER_CLOCK

The SLOWDOWN_MASTER_CLOCK definition is not used, remove the redundant code.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

diff --git a/arch/arm/mach-at91/pm_slowclock.S b/arch/arm/mach-at91/pm_slowclock.S
index 931f0e3..6022d2d 100644 (file)
--- a/arch/arm/mach-at91/pm_slowclock.S
+++ b/arch/arm/mach-at91/pm_slowclock.S
@@ -11,20 +11,11 @@
  * published by the Free Software Foundation.
  *
  */
-
 #include <linux/linkage.h>
 #include <linux/clk/at91_pmc.h>
 #include <mach/hardware.h>
 #include <mach/at91_ramc.h>
 
-/*
- * When SLOWDOWN_MASTER_CLOCK is defined we will also slow down the Master
- * clock during suspend by adjusting its prescalar and divisor.
- * NOTE: This hasn't been shown to be stable on SAM9s; and on the RM9200 there
- *       are errata regarding adjusting the prescalar and divisor.
- */
-#undef SLOWDOWN_MASTER_CLOCK
-
 pmc    .req    r0
 sdramc .req    r1
 ramc1  .req    r2
@@ -177,18 +168,6 @@ sdr_sr_done:
 
        wait_mckrdy
 
-#ifdef SLOWDOWN_MASTER_CLOCK
-       /*
-        * Set the Master Clock PRES and MDIV fields.
-        *
-        * See AT91RM9200 errata #27 and #28 for details.
-        */
-       mov     tmp1, #0
-       str     tmp1, [pmc, #AT91_PMC_MCKR]
-
-       wait_mckrdy
-#endif
-
        /* Save PLLA setting and disable it */
        ldr     tmp1, [pmc, #AT91_CKGR_PLLAR]
        str     tmp1, .saved_pllar
@@ -245,22 +224,6 @@ sdr_sr_done:
        wait_pllalock
 4:
 
-#ifdef SLOWDOWN_MASTER_CLOCK
-       /*
-        * First set PRES if it was not 0,
-        * than set CSS and MDIV fields.
-        *
-        * See AT91RM9200 errata #27 and #28 for details.
-        */
-       ldr     tmp1, .saved_mckr
-       tst     tmp1, #AT91_PMC_PRES
-       beq     2f
-       and     tmp1, tmp1, #AT91_PMC_PRES
-       str     tmp1, [pmc, #AT91_PMC_MCKR]
-
-       wait_mckrdy
-#endif
-
        /*
         * Restore master clock setting
         */