diff options
| author | Jarkko Nikula <jarkko.nikula@nokia.com> | 2008-10-08 10:01:41 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2008-10-08 10:01:41 +0300 |
| commit | 5a07055a3849574f4fbe5d0ce7cd2d26ab9a37c1 (patch) | |
| tree | 90760a649788efc7a42ff344e39d581655421e95 /arch/arm/plat-omap/mcbsp.c | |
| parent | 05228c35c67995c745ae3c768eaf90740c643fa9 (diff) | |
ARM: OMAP: Fixes to omap_mcbsp_request function
Bootloader may let McBSP logic running so make sure that block is idle
before requesting IRQs. Also make sure that TX and RX waitqueues are
initialized before request_irq.
Signed-off-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/mcbsp.c')
| -rw-r--r-- | arch/arm/plat-omap/mcbsp.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index f27e641bf81..af33fc713e1 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -234,8 +234,16 @@ int omap_mcbsp_request(unsigned int id) mcbsp->free = 0; spin_unlock(&mcbsp->lock); + /* + * Make sure that transmitter, receiver and sample-rate generator are + * not running before activating IRQs. + */ + OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR1, 0); + OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR2, 0); + if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { /* We need to get IRQs here */ + init_completion(&mcbsp->tx_irq_completion); err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler, 0, "McBSP", (void *)mcbsp); if (err != 0) { @@ -245,8 +253,7 @@ int omap_mcbsp_request(unsigned int id) return err; } - init_completion(&mcbsp->tx_irq_completion); - + init_completion(&mcbsp->rx_irq_completion); err = request_irq(mcbsp->rx_irq, omap_mcbsp_rx_irq_handler, 0, "McBSP", (void *)mcbsp); if (err != 0) { @@ -256,8 +263,6 @@ int omap_mcbsp_request(unsigned int id) free_irq(mcbsp->tx_irq, (void *)mcbsp); return err; } - - init_completion(&mcbsp->rx_irq_completion); } return 0; |