ARM: tegra: clock: add clk_id_to_pll_id helper

This function allows to convert a device tree clock ID to PLL ID.

Tested-by: Andreas Westman Dorcsak <[email protected]> # ASUS TF T30
Tested-by: Robert Eckelmann <[email protected]> # ASUS TF101 T20
Tested-by: Svyatoslav Ryhel <[email protected]> # HTC One X
Signed-off-by: Svyatoslav Ryhel <[email protected]>
Signed-off-by: Tom <[email protected]>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-tegra/clock.h b/arch/arm/include/asm/arch-tegra/clock.h
index 1dd5d0742c4..22705014064 100644
--- a/arch/arm/include/asm/arch-tegra/clock.h
+++ b/arch/arm/include/asm/arch-tegra/clock.h
@@ -354,6 +354,14 @@ int get_periph_clock_source(enum periph_id periph_id,
  */
 enum periph_id clk_id_to_periph_id(int clk_id);
 
+/*
+ * Convert a device tree clock ID to our PLL ID.
+ *
+ * @param clk_id	Clock ID according to tegra device tree binding
+ * Return: clock ID, or CLOCK_ID_NONE if the clock ID is invalid
+ */
+enum clock_id clk_id_to_pll_id(int clk_id);
+
 /**
  * Set the output frequency you want for each PLL clock.
  * PLL output frequencies are programmed by setting their N, M and P values.