Commit 23065096 authored Mar 06, 2015 by Thor Thayer Committed by Mark Brown Mar 09, 2015

spi: dw-spi: Single Register read to clear IRQs



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 <tthayer@opensource.altera.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent d744f826

drivers/spi/spi-dw.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -232,9 +232,7 @@ 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;
		}