From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCHv3 2/2] spi: dw: Set GPIO_SS flag to toggle Slave Select on GPIO CS Date: Mon, 10 Oct 2016 09:25:25 -0500 Message-ID: <1476109525-21213-2-git-send-email-tthayer@opensource.altera.com> References: <1476109525-21213-1-git-send-email-tthayer@opensource.altera.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , , , , , , To: Return-path: In-Reply-To: <1476109525-21213-1-git-send-email-tthayer@opensource.altera.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org From: Thor Thayer The Designware SPI master requires slave selection before the transfer can begin [1]. This patch uses the new master flag to indicate both the GPIO CS and the internal chip select should be used. Tested On: Altera CycloneV development kit Compile tested for build errors on x86_64 (allyesconfigs) [1] DesignWare dw_apb_ssi Databook, Version 3.20a (page 39) Signed-off-by: Thor Thayer --- v3 Use SPI_MASTER_GPIO_SS --- drivers/spi/spi-dw.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index 27960e4..b715a26 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -502,6 +502,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws) master->handle_err = dw_spi_handle_err; master->max_speed_hz = dws->max_freq; master->dev.of_node = dev->of_node; + master->flags = SPI_MASTER_GPIO_SS; /* Basic HW init */ spi_hw_init(dev, dws); -- 1.7.9.5