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-rw-r--r--arch/arm/cpu/tegra114-common/clock.c2
-rw-r--r--arch/arm/cpu/tegra30-common/clock.c2
-rw-r--r--arch/arm/include/asm/arch-tegra/clock.h11
3 files changed, 12 insertions, 3 deletions
diff --git a/arch/arm/cpu/tegra114-common/clock.c b/arch/arm/cpu/tegra114-common/clock.c
index 47612e1..3bede71 100644
--- a/arch/arm/cpu/tegra114-common/clock.c
+++ b/arch/arm/cpu/tegra114-common/clock.c
@@ -103,7 +103,7 @@ static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX+1] = {
MASK_BITS_31_29},
{ CLK(PERIPH), CLK(CGENERAL), CLK(SFROM32KHZ), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
- MASK_BITS_29_28}
+ MASK_BITS_31_28}
};
/*
diff --git a/arch/arm/cpu/tegra30-common/clock.c b/arch/arm/cpu/tegra30-common/clock.c
index 89c3529..3352870 100644
--- a/arch/arm/cpu/tegra30-common/clock.c
+++ b/arch/arm/cpu/tegra30-common/clock.c
@@ -102,7 +102,7 @@ static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX+1] = {
MASK_BITS_31_29},
{ CLK(PERIPH), CLK(CGENERAL), CLK(SFROM32KHZ), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
- MASK_BITS_29_28}
+ MASK_BITS_31_28}
};
/*
diff --git a/arch/arm/include/asm/arch-tegra/clock.h b/arch/arm/include/asm/arch-tegra/clock.h
index 052c020..80825e3 100644
--- a/arch/arm/include/asm/arch-tegra/clock.h
+++ b/arch/arm/include/asm/arch-tegra/clock.h
@@ -20,10 +20,19 @@ enum clock_osc_freq {
CLOCK_OSC_FREQ_COUNT,
};
+/*
+ * Note that no Tegra clock register actually uses all of bits 31:28 as
+ * the mux field. Rather, bits 30:28, 29:28, or 28 are used. However, in
+ * those cases, nothing is stored in the bits about the mux field, so it's
+ * safe to pretend that the mux field extends all the way to the end of the
+ * register. As such, the U-Boot clock driver is currently a bit lazy, and
+ * doesn't distinguish between 31:28, 30:28, 29:28 and 28; it just lumps
+ * them all together and pretends they're all 31:28.
+ */
enum {
MASK_BITS_31_30 = 2, /* num of bits used to specify clock source */
MASK_BITS_31_29,
- MASK_BITS_29_28,
+ MASK_BITS_31_28,
};
#include <asm/arch/clock-tables.h>