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ARM: OMAP: mcbsp: Start generalize signal muxing functions

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This generalizes the omap2_mcbsp1_mux_clkr_src and omap2_mcbsp1_mux_fsr_src
implementation between generic McBSP and OMAP2 specific McBSP code. These
functions are used to select source for CLKR and FSR signals on OMAP2+.

Start generalizing the code by implementing an optional mux_signal function
pointer in platform data that will implement the actual muxing and which is
called now from omap2_mcbsp1_mux_clkr_src and omap2_mcbsp1_mux_fsr_src.
These functions are to be removed later and cleanup the API so that
mux_signal gets its arguments directly from client code.

Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Jarkko Nikula
2011-09-26 10:45:49 +03:00
committed by Tony Lindgren
parent 09d28d2c19
commit 7bc0c4bac7
3 changed files with 53 additions and 27 deletions
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36
arch/arm/plat-omap/mcbsp.c
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@ -922,21 +922,41 @@ int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
}
EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
#ifndef CONFIG_ARCH_OMAP2PLUS
void omap2_mcbsp1_mux_clkr_src(u8 mux)
{
WARN(1, "%s: should never be called on an OMAP1-only kernel\n",
__func__);
return;
struct omap_mcbsp *mcbsp;
const char *src;
if (mux == CLKR_SRC_CLKR)
src = "clkr";
else if (mux == CLKR_SRC_CLKX)
src = "clkx";
else
return;
mcbsp = id_to_mcbsp_ptr(0);
if (mcbsp->pdata->mux_signal)
mcbsp->pdata->mux_signal(mcbsp->dev, "clkr", src);
}
EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
void omap2_mcbsp1_mux_fsr_src(u8 mux)
{
WARN(1, "%s: should never be called on an OMAP1-only kernel\n",
__func__);
return;
struct omap_mcbsp *mcbsp;
const char *src;
if (mux == FSR_SRC_FSR)
src = "fsr";
else if (mux == FSR_SRC_FSX)
src = "fsx";
else
return;
mcbsp = id_to_mcbsp_ptr(0);
if (mcbsp->pdata->mux_signal)
mcbsp->pdata->mux_signal(mcbsp->dev, "fsr", src);
}
#endif
EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
#define max_thres(m) (mcbsp->pdata->buffer_size)
#define valid_threshold(m, val) ((val) <= max_thres(m))