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ARM: tegra: implement MASK_BITS_31_29

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Some clock sources have 3-bit muxes in bits 31:29. Implement core
support for this mux field.

Signed-off-by: Tom Warren <twarren@nvidia.com>
[swarren, extracted from a larger patch by Tom]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Tom Warren 2014-01-24 10:16:22 -07:00 committed by Tom Warren
parent 04b8e8e745
commit c82014daf5
2 changed files with 21 additions and 4 deletions
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22
arch/arm/cpu/tegra-common/clock.c
View File

@ -304,13 +304,27 @@ static int adjust_periph_pll(enum periph_id periph_id, int source,
/* work out the source clock and set it */
if (source < 0)
return -1;
if (mux_bits == MASK_BITS_31_28) {
clrsetbits_le32(reg, OUT_CLK_SOURCE_31_28_MASK,
source << OUT_CLK_SOURCE_31_28_SHIFT);
} else {
switch (mux_bits) {
case MASK_BITS_31_30:
clrsetbits_le32(reg, OUT_CLK_SOURCE_31_30_MASK,
source << OUT_CLK_SOURCE_31_30_SHIFT);
break;
case MASK_BITS_31_29:
clrsetbits_le32(reg, OUT_CLK_SOURCE_31_29_MASK,
source << OUT_CLK_SOURCE_31_29_SHIFT);
break;
case MASK_BITS_31_28:
clrsetbits_le32(reg, OUT_CLK_SOURCE_31_28_MASK,
source << OUT_CLK_SOURCE_31_28_SHIFT);
break;
default:
return -1;
}
udelay(2);
return 0;
}

3
arch/arm/include/asm/arch-tegra/clk_rst.h
View File

@ -236,6 +236,9 @@ enum {
#define OUT_CLK_SOURCE_31_30_SHIFT 30
#define OUT_CLK_SOURCE_31_30_MASK (3U << OUT_CLK_SOURCE_31_30_SHIFT)
#define OUT_CLK_SOURCE_31_29_SHIFT 29
#define OUT_CLK_SOURCE_31_29_MASK (7U << OUT_CLK_SOURCE_31_29_SHIFT)
/* Note: See comment for MASK_BITS_31_28 in arch-tegra/clock.h */
#define OUT_CLK_SOURCE_31_28_SHIFT 28
#define OUT_CLK_SOURCE_31_28_MASK (15U << OUT_CLK_SOURCE_31_28_SHIFT)