Patchwork [2/3] ARM: mx28evk: set a initial clock rate for saif

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Submitter Dong Aisheng
Date Aug. 21, 2011, 5:05 p.m.
Message ID <1313946300-3861-1-git-send-email-b29396@freescale.com>
Download mbox | patch
Permalink /patch/110835/
State New
Headers show

Comments

Dong Aisheng - Aug. 21, 2011, 5:05 p.m.
Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@ti.com>

---
Note this patch still needs another patch from Wolfram to work.
I send out it in this series as
[PATCH 3/3] arm: mxs: disable clock-gates when setting saif-clocks

As discussed with Wolfram, that patch may still have some later work
to do. However, we just send out it for testers to work first.
---
 arch/arm/mach-mxs/clock-mx28.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

Patch

diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c
index f589c6c..2a2db65 100644
--- a/arch/arm/mach-mxs/clock-mx28.c
+++ b/arch/arm/mach-mxs/clock-mx28.c
@@ -788,6 +788,15 @@  int __init mx28_clocks_init(void)
 	clk_set_parent(&saif0_clk, &pll0_clk);
 	clk_set_parent(&saif1_clk, &pll0_clk);
 
+	/*
+	 * Set an initial clk rate for saif's internal logic to work properly,
+	 * this is especially for the saif working on EXTMASTER mode that who
+	 * uses other saif's BITCLK&LRCLK but it still needs a basic clk which
+	 * should be bigger enough for its internal logic.
+	 */
+	clk_set_rate(&saif0_clk, 24000000);
+	clk_set_rate(&saif1_clk, 24000000);
+
 	clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 
 	mxs_timer_init(&clk32k_clk, MX28_INT_TIMER0);