From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [RFC/PATCHv2 1/3] spi: dw-spi: Single Register read to clear IRQs Date: Fri, 6 Mar 2015 17:46:32 -0600 Message-ID: <1425685594-26595-2-git-send-email-tthayer@opensource.altera.com> References: <1425685594-26595-1-git-send-email-tthayer@opensource.altera.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , , , , , , Andy Shevchenko To: , , , , , , , Return-path: In-Reply-To: <1425685594-26595-1-git-send-email-tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org> Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: From: Thor Thayer Instead of clearing the RxU, RxO, and TxO IRQs individually with 3 register reads, a single read of the ICR register will do the same thing. Signed-off-by: Thor Thayer Signed-off-by: Andy Shevchenko --- drivers/spi/spi-dw.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 950bc50..c5fa2be 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -258,9 +258,7 @@ static irqreturn_t interrupt_transfer(struct dw_spi *dws) /* Error handling */ if (irq_status & (SPI_INT_TXOI | SPI_INT_RXOI | SPI_INT_RXUI)) { - dw_readw(dws, DW_SPI_TXOICR); - dw_readw(dws, DW_SPI_RXOICR); - dw_readw(dws, DW_SPI_RXUICR); + dw_readw(dws, DW_SPI_ICR); int_error_stop(dws, "interrupt_transfer: fifo overrun/underrun"); return IRQ_HANDLED; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html