diff options
| author | Liu Ying <Ying.Liu@freescale.com> | 2012-06-27 16:08:49 +0800 |
|---|---|---|
| committer | Liu Ying <Ying.Liu@freescale.com> | 2012-06-29 15:40:46 +0800 |
| commit | ace3723ceff0d546e0176f74ad38d58a6d11b7ee (patch) | |
| tree | fbaf50ae37a9f95bef4374455f6d7f366f0ca4c0 | |
| parent | 3827c82e439b6a8bbb6569a01327043251875964 (diff) | |
ENGR00215041-2 MX6 SabreSD:Set clko parent to be clko2
On MX6 SabreSD board, gpio_0 is muxed to clko to be
audio mclk and camera mclk. 24MHz osc clk is a stable
clock source, which can meet the requirement of audio
mclk and camera mclk. This patch sets clko parent
clock to be clko2 clock so that camera mclk and audio
mclk can source from osc clk.
There are 2 benifits after applying this patch:
1) clko's original parent clock(pll4_audio_main_clk)
can be gated off to save power or used by another
module.
2) ov5640/ov5642 camera most settings can reach
claimed 15fps or 30fps with no human eye recognizable
video quality downgrade.
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
| -rw-r--r-- | arch/arm/mach-mx6/board-mx6q_sabresd.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/mach-mx6/board-mx6q_sabresd.c b/arch/arm/mach-mx6/board-mx6q_sabresd.c index ca66d4933b85..9d4d9e689ef3 100644 --- a/arch/arm/mach-mx6/board-mx6q_sabresd.c +++ b/arch/arm/mach-mx6/board-mx6q_sabresd.c @@ -1631,7 +1631,7 @@ static void __init mx6_sabresd_board_init(void) { int i; int ret; - struct clk *clko2; + struct clk *clko, *clko2; struct clk *new_parent; struct clk *sdio_clk; int rate; @@ -1806,6 +1806,11 @@ static void __init mx6_sabresd_board_init(void) clk_set_rate(clko2, rate); clk_enable(clko2); + /* Camera and audio use osc clock */ + clko = clk_get(NULL, "clko_clk"); + if (!IS_ERR(clko)) + clk_set_parent(clko, clko2); + /* Enable Aux_5V */ gpio_request(SABRESD_AUX_5V_EN, "aux_5v_en"); gpio_direction_output(SABRESD_AUX_5V_EN, 1); |