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authorSekhar Nori <nsekhar@ti.com>2009-11-16 14:51:33 +0300
committerKevin Hilman <khilman@deeprootsystems.com>2010-02-05 00:29:33 +0300
commit9a219a9ecf49ab156df4c18267ade4d468d9930e (patch)
treec71e664117603bbdf4eef09f1bb15fddccb86de4 /arch/arm/mach-davinci/clock.h
parentd2de05827cce9438dfc61d5a4cf13b6ca82ebdee (diff)
downloadlinux-9a219a9ecf49ab156df4c18267ade4d468d9930e.tar.xz
davinci: move PLL wait time values to clock.h
As suspend support is added, the code supporting the suspend operation needs to bypass PLLs and needs to access the same wait time values as the PLL code in clock.c. To facilitate this, move the PLL wait times to clock.h where they can be accessed by suspend code. Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/clock.h')
-rw-r--r--arch/arm/mach-davinci/clock.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h
index c92d77a3008d..eca4d9972225 100644
--- a/arch/arm/mach-davinci/clock.h
+++ b/arch/arm/mach-davinci/clock.h
@@ -53,6 +53,21 @@
#define PLLDIV_EN BIT(15)
#define PLLDIV_RATIO_MASK 0x1f
+/*
+ * OMAP-L138 system reference guide recommends a wait for 4 OSCIN/CLKIN
+ * cycles to ensure that the PLLC has switched to bypass mode. Delay of 1us
+ * ensures we are good for all > 4MHz OSCIN/CLKIN inputs. Typically the input
+ * is ~25MHz. Units are micro seconds.
+ */
+#define PLL_BYPASS_TIME 1
+/* From OMAP-L138 datasheet table 6-4. Units are micro seconds */
+#define PLL_RESET_TIME 1
+/*
+ * From OMAP-L138 datasheet table 6-4; assuming prediv = 1, sqrt(pllm) = 4
+ * Units are micro seconds.
+ */
+#define PLL_LOCK_TIME 20
+
struct pll_data {
u32 phys_base;
void __iomem *base;