[RFC PATCH 2/2] spi: zynqmp: gqspi: add support for stacked mode configuration

Ranjit Waghmode
2015-07-09T12:44:55Z

This patch adds support of stacked mode configuration for
Zynq Ultrascale+ MPSoC GQSPI controller driver.

Signed-off-by: Ranjit Waghmode <ranjit.waghmode@xilinx.com>
---
drivers/spi/spi-zynqmp-gqspi.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c
index 271fa80..6c9f7d9 100644
--- a/drivers/spi/spi-zynqmp-gqspi.c
+++ b/drivers/spi/spi-zynqmp-gqspi.c
@@ -410,6 +410,10 @@ static void zynqmp_qspi_chipselect(struct spi_device *qspi, bool is_high)
zynqmp_gqspi_selectslave(xqspi,
GQSPI_SELECT_FLASH_CS_BOTH,
GQSPI_SELECT_FLASH_BUS_BOTH);
+ } else if (qspi->master->flags & SPI_MASTER_U_PAGE) {
+ zynqmp_gqspi_selectflash(xqspi,
+ GQSPI_SELECT_FLASH_CS_UPPER,
+ GQSPI_SELECT_FLASH_BUS_LOWER);
} else {
zynqmp_gqspi_selectslave(xqspi,
GQSPI_SELECT_FLASH_CS_LOWER,
--
2.1.2