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- Subject: [PATCH V6 13/15] spi: spi-zynqmp-gqspi: Add stacked memories support in GQSPI driver
- From: Amit Kumar Mahapatra <amit.kumar-mahapatra@xxxxxxx>
- Date: Fri, 10 Mar 2023 23:02:15 +0530
- Cc: git@xxxxxxx, linux-spi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, joel@xxxxxxxxx, andrew@xxxxxxxx, radu_nicolae.pirea@xxxxxx, nicolas.ferre@xxxxxxxxxxxxx, alexandre.belloni@xxxxxxxxxxx, claudiu.beznea@xxxxxxxxxxxxx, bcm-kernel-feedback-list@xxxxxxxxxxxx, fancer.lancer@xxxxxxxxx, kernel@xxxxxxxxxxxxxx, festevam@xxxxxxxxx, linux-imx@xxxxxxx, jbrunet@xxxxxxxxxxxx, martin.blumenstingl@xxxxxxxxxxxxxx, avifishman70@xxxxxxxxx, tmaimon77@xxxxxxxxx, tali.perry1@xxxxxxxxx, venture@xxxxxxxxxx, yuenn@xxxxxxxxxx, benjaminfair@xxxxxxxxxx, yogeshgaur.83@xxxxxxxxx, konrad.dybcio@xxxxxxxxxxxxxx, alim.akhtar@xxxxxxxxxxx, ldewangan@xxxxxxxxxx, thierry.reding@xxxxxxxxx, jonathanh@xxxxxxxxxx, michal.simek@xxxxxxx, linux-aspeed@xxxxxxxxxxxxxxxx, openbmc@xxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-rpi-kernel@xxxxxxxxxxxxxxxxxxx, linux-amlogic@xxxxxxxxxxxxxxxxxxx, linux-mediatek@xxxxxxxxxxxxxxxxxxx, linux-arm-msm@xxxxxxxxxxxxxxx, linux-rockchip@xxxxxxxxxxxxxxxxxxx, linux-samsung-soc@xxxxxxxxxxxxxxx, linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx, linux-sunxi@xxxxxxxxxxxxxxx, linux-tegra@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-wpan@xxxxxxxxxxxxxxx, libertas-dev@xxxxxxxxxxxxxxxxxxx, linux-wireless@xxxxxxxxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, lars@xxxxxxxxxx, Michael.Hennerich@xxxxxxxxxx, linux-iio@xxxxxxxxxxxxxxx, michael@xxxxxxxx, palmer@xxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, alsa-devel@xxxxxxxxxxxxxxxx, patches@xxxxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, amitrkcian2002@xxxxxxxxx, amit.kumar-mahapatra@xxxxxxx
- In-reply-to: <20230310173217.3429788-1-amit.kumar-mahapatra@amd.com>
- References: <20230310173217.3429788-1-amit.kumar-mahapatra@amd.com>
GQSPI supports two chip select CS0 & CS1. Update the driver to assert/de-assert the appropriate chip select as per the bits set in qspi->cs_index_mask. Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xxxxxxx> --- drivers/spi/spi-zynqmp-gqspi.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index fb2ca9b90eab..3d2b92a88e8a 100644 --- a/drivers/spi/spi-zynqmp-gqspi.c +++ b/drivers/spi/spi-zynqmp-gqspi.c @@ -156,6 +156,9 @@ #define GQSPI_FREQ_100MHZ 100000000 #define GQSPI_FREQ_150MHZ 150000000 +#define GQSPI_SELECT_LOWER_CS BIT(0) +#define GQSPI_SELECT_UPPER_CS BIT(1) + #define SPI_AUTOSUSPEND_TIMEOUT 3000 enum mode_type {GQSPI_MODE_IO, GQSPI_MODE_DMA}; @@ -467,15 +470,17 @@ static void zynqmp_qspi_chipselect(struct spi_device *qspi, bool is_high) genfifoentry |= GQSPI_GENFIFO_MODE_SPI; + if (qspi->cs_index_mask & GQSPI_SELECT_UPPER_CS) { + zynqmp_gqspi_selectslave(xqspi, + GQSPI_SELECT_FLASH_CS_UPPER, + GQSPI_SELECT_FLASH_BUS_LOWER); + } else if (qspi->cs_index_mask & GQSPI_SELECT_LOWER_CS) { + zynqmp_gqspi_selectslave(xqspi, + GQSPI_SELECT_FLASH_CS_LOWER, + GQSPI_SELECT_FLASH_BUS_LOWER); + } + genfifoentry |= xqspi->genfifobus; if (!is_high) { - if (!spi_get_chipselect(qspi, 0)) { - xqspi->genfifobus = GQSPI_GENFIFO_BUS_LOWER; - xqspi->genfifocs = GQSPI_GENFIFO_CS_LOWER; - } else { - xqspi->genfifobus = GQSPI_GENFIFO_BUS_UPPER; - xqspi->genfifocs = GQSPI_GENFIFO_CS_UPPER; - } - genfifoentry |= xqspi->genfifobus; genfifoentry |= xqspi->genfifocs; genfifoentry |= GQSPI_GENFIFO_CS_SETUP; } else { -- 2.25.1
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