arm: am33xx: Add support for mulitiple PLL input frequencies
am335x supports various sysclk frequencies which can be determined
using sysboot pins. PLLs should be configures based on this
sysclk frequency. Add PLL configurations for all supported
frequencies.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-omap2/am33xx/sys_info.c b/arch/arm/mach-omap2/am33xx/sys_info.c
index 58bfa5c..564bae6 100644
--- a/arch/arm/mach-omap2/am33xx/sys_info.c
+++ b/arch/arm/mach-omap2/am33xx/sys_info.c
@@ -68,6 +68,24 @@
return readl(&cstat->statusreg) & SYSBOOT_MASK;
}
+u32 get_sys_clk_index(void)
+{
+ struct ctrl_stat *ctrl = (struct ctrl_stat *)CTRL_BASE;
+ u32 ind = readl(&ctrl->statusreg);
+
+#ifdef CONFIG_AM43XX
+ u32 src;
+ src = (ind & CTRL_CRYSTAL_FREQ_SRC_MASK) >> CTRL_CRYSTAL_FREQ_SRC_SHIFT;
+ if (src == CTRL_CRYSTAL_FREQ_SRC_EFUSE) /* Value read from EFUSE */
+ return ((ind & CTRL_CRYSTAL_FREQ_SELECTION_MASK) >>
+ CTRL_CRYSTAL_FREQ_SELECTION_SHIFT);
+ else /* Value read from SYS BOOT pins */
+#endif
+ return ((ind & CTRL_SYSBOOT_15_14_MASK) >>
+ CTRL_SYSBOOT_15_14_SHIFT);
+}
+
+
#ifdef CONFIG_DISPLAY_CPUINFO
static char *cpu_revs[] = {
"1.0",