diff options
| author | Paul Walmsley <paul@pwsan.com> | 2010-10-08 19:40:19 +0200 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2010-10-08 19:40:19 +0200 |
| commit | cf4c87abe238ec17cd0255b4e21abd949d7f811e (patch) | |
| tree | feffd8e664e1718ab4dc0d4ba83c26fe5b8d4be3 /arch/arm/mach-omap2 | |
| parent | OMAP3xxx: clock: add clkdev aliases for McBSP fclk source switching (diff) | |
| download | linux-cf4c87abe238ec17cd0255b4e21abd949d7f811e.tar.xz linux-cf4c87abe238ec17cd0255b4e21abd949d7f811e.zip | |
OMAP: McBSP: implement McBSP CLKR and FSR signal muxing via mach-omap2/mcbsp.c
The OMAP ASoC McBSP code implemented CLKR and FSR signal muxing via
direct System Control Module writes on OMAP2+. This required the
omap_ctrl_{read,write}l() functions to be exported, which is against
policy: the only code that should call those functions directly is
OMAP core code, not device drivers. omap_ctrl_{read,write}*() are no
longer exported, so the driver no longer builds as a module.
Fix the pinmuxing part of the problem by removing calls to
omap_ctrl_{read,write}l() from the OMAP ASoC McBSP code and
implementing signal muxing functions in arch/arm/mach-omap2/mcbsp.c.
Due to the unfortunate way that McBSP support is implemented in ASoC
and the OMAP tree, these symbols must be exported for use by
sound/soc/omap/omap-mcbsp.c.
Going forward, the McBSP device driver should be moved from
arch/arm/*omap* into drivers/ or sound/soc/*, and the CPU DAI driver
should be implemented as a platform_driver as many other ASoC CPU DAI
drivers are. These two steps should resolve many of the layering
problems, which will rapidly reappear during a McBSP hwmod/PM runtime
conversion.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Acked-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'arch/arm/mach-omap2')
| -rw-r--r-- | arch/arm/mach-omap2/mcbsp.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c index 88b8790e4fec..4c9c999dfa4a 100644 --- a/arch/arm/mach-omap2/mcbsp.c +++ b/arch/arm/mach-omap2/mcbsp.c @@ -22,7 +22,37 @@ #include <plat/dma.h> #include <plat/cpu.h> #include <plat/mcbsp.h> +#include <plat/control.h> +/* McBSP internal signal muxing functions */ + +void omap2_mcbsp1_mux_clkr_src(u8 mux) +{ + u32 v; + + v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); + if (mux == CLKR_SRC_CLKR) + v &= OMAP2_MCBSP1_CLKR_MASK; + else if (mux == CLKR_SRC_CLKX) + v |= OMAP2_MCBSP1_CLKR_MASK; + omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0); +} +EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src); + +void omap2_mcbsp1_mux_fsr_src(u8 mux) +{ + u32 v; + + v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0); + if (mux == FSR_SRC_FSR) + v &= OMAP2_MCBSP1_FSR_MASK; + else if (mux == FSR_SRC_FSX) + v |= OMAP2_MCBSP1_FSR_MASK; + omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0); +} +EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src); + +/* Platform data */ #ifdef CONFIG_ARCH_OMAP2420 static struct omap_mcbsp_platform_data omap2420_mcbsp_pdata[] = { |