summaryrefslogtreecommitdiff
path: root/arch/arm/mach-davinci
diff options
context:
space:
mode:
authorSekhar Nori <nsekhar@ti.com>2011-07-06 06:01:22 (GMT)
committerSekhar Nori <nsekhar@ti.com>2011-07-08 05:40:09 (GMT)
commitaad70de20fc69970a3080e7e8f02b54a4a3fe3e6 (patch)
tree2b6564f263d1741d2824e7b8af2d22be6e4a23c8 /arch/arm/mach-davinci
parenta51ca38b6330e463cc1a7adf64502ff735452915 (diff)
downloadlinux-fsl-qoriq-aad70de20fc69970a3080e7e8f02b54a4a3fe3e6.tar.xz
davinci: enable forced transitions on PSC
Some DaVinci modules like the SATA on DA850 need forced module state transitions. Define a "force" flag which can be passed to the PSC config function to enable it to make forced transitions. Forced transitions shouldn't normally be attempted, unless the TRM explicitly specifies its usage. ChangeLog: v2: Modified to take care of the fact that davinci_psc_config() now takes the flags directly. Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Diffstat (limited to 'arch/arm/mach-davinci')
-rw-r--r--arch/arm/mach-davinci/clock.h1
-rw-r--r--arch/arm/mach-davinci/include/mach/psc.h1
-rw-r--r--arch/arm/mach-davinci/psc.c2
3 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h
index 0dd2203..48ee462 100644
--- a/arch/arm/mach-davinci/clock.h
+++ b/arch/arm/mach-davinci/clock.h
@@ -111,6 +111,7 @@ struct clk {
#define CLK_PLL BIT(4) /* PLL-derived clock */
#define PRE_PLL BIT(5) /* source is before PLL mult/div */
#define PSC_SWRSTDISABLE BIT(6) /* Disable state is SwRstDisable */
+#define PSC_FORCE BIT(7) /* Force module state transtition */
#define CLK(dev, con, ck) \
{ \
diff --git a/arch/arm/mach-davinci/include/mach/psc.h b/arch/arm/mach-davinci/include/mach/psc.h
index 215fcca..6213f0d 100644
--- a/arch/arm/mach-davinci/include/mach/psc.h
+++ b/arch/arm/mach-davinci/include/mach/psc.h
@@ -244,6 +244,7 @@
#define PSC_STATE_ENABLE 3
#define MDSTAT_STATE_MASK 0x1f
+#define MDCTL_FORCE BIT(31)
#ifndef __ASSEMBLER__
diff --git a/arch/arm/mach-davinci/psc.c b/arch/arm/mach-davinci/psc.c
index 823cb1b..1fb6bdf 100644
--- a/arch/arm/mach-davinci/psc.c
+++ b/arch/arm/mach-davinci/psc.c
@@ -75,6 +75,8 @@ void davinci_psc_config(unsigned int domain, unsigned int ctlr,
mdctl = __raw_readl(psc_base + MDCTL + 4 * id);
mdctl &= ~MDSTAT_STATE_MASK;
mdctl |= next_state;
+ if (flags & PSC_FORCE)
+ mdctl |= MDCTL_FORCE;
__raw_writel(mdctl, psc_base + MDCTL + 4 * id);
pdstat = __raw_readl(psc_base + PDSTAT);