From 62946172c81578477fcbb26478aebaa31353488d Mon Sep 17 00:00:00 2001 From: Doug Anderson Date: Wed, 3 Sep 2014 13:44:26 -0700 Subject: [PATCH] spi/rockchip: Don't warn if SPI is busy but disabled The reference manual from Rockchip claims this about the BSF (SPI Busy Flag): * 0 - SPI is idle or disabled * 1 - SPI is actively transferring data The above doesn't quite appear to be true. Specifically I found the busy bit set when SPI was disabled. Let's change the WARN_ON() so we only check the busy bit if the controller was enabled. Signed-off-by: Doug Anderson Signed-off-by: Mark Brown --- drivers/spi/spi-rockchip.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 2a31bc2d3fd3..514f8e73b8e1 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -529,7 +529,8 @@ static int rockchip_spi_transfer_one( int ret = 0; struct rockchip_spi *rs = spi_master_get_devdata(master); - WARN_ON((readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)); + WARN_ON(readl_relaxed(rs->regs + ROCKCHIP_SPI_SSIENR) && + (readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)); if (!xfer->tx_buf && !xfer->rx_buf) { dev_err(rs->dev, "No buffer for transfer\n");