Message ID | 20230119185342.2093323-12-amit.kumar-mahapatra@amd.com |
---|---|
State | Superseded |
Headers | show
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Thu, 19 Jan 2023 12:58:28 -0600 From: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com> To: <broonie@kernel.org>, <miquel.raynal@bootlin.com>, <richard@nod.at>, <vigneshr@ti.com>, <jic23@kernel.org>, <tudor.ambarus@microchip.com>, <pratyush@kernel.org>, <sanju.mehta@amd.com>, <chin-ting_kuo@aspeedtech.com>, <clg@kaod.org>, <kdasu.kdev@gmail.com>, <f.fainelli@gmail.com>, <rjui@broadcom.com>, <sbranden@broadcom.com>, <eajames@linux.ibm.com>, <olteanv@gmail.com>, <han.xu@nxp.com>, <john.garry@huawei.com>, <shawnguo@kernel.org>, <s.hauer@pengutronix.de>, <narmstrong@baylibre.com>, <khilman@baylibre.com>, <matthias.bgg@gmail.com>, <haibo.chen@nxp.com>, <linus.walleij@linaro.org>, <daniel@zonque.org>, <haojian.zhuang@gmail.com>, <robert.jarzmik@free.fr>, <agross@kernel.org>, <bjorn.andersson@linaro.org>, <heiko@sntech.de>, <krzysztof.kozlowski@linaro.org>, <andi@etezian.org>, <mcoquelin.stm32@gmail.com>, <alexandre.torgue@foss.st.com>, <wens@csie.org>, <jernej.skrabec@gmail.com>, <samuel@sholland.org>, <masahisa.kojima@linaro.org>, <jaswinder.singh@linaro.org>, <rostedt@goodmis.org>, <mingo@redhat.com>, <l.stelmach@samsung.com>, <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>, <pabeni@redhat.com>, <alex.aring@gmail.com>, <stefan@datenfreihafen.org>, <kvalo@kernel.org>, <thierry.reding@gmail.com>, <jonathanh@nvidia.com>, <skomatineni@nvidia.com>, <sumit.semwal@linaro.org>, <christian.koenig@amd.com>, <j.neuschaefer@gmx.net>, <vireshk@kernel.org>, <rmfrfs@gmail.com>, <johan@kernel.org>, <elder@kernel.org>, <gregkh@linuxfoundation.org> CC: <git@amd.com>, <linux-spi@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <joel@jms.id.au>, <andrew@aj.id.au>, <radu_nicolae.pirea@upb.ro>, <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>, <claudiu.beznea@microchip.com>, <bcm-kernel-feedback-list@broadcom.com>, <fancer.lancer@gmail.com>, <kernel@pengutronix.de>, <festevam@gmail.com>, <linux-imx@nxp.com>, <jbrunet@baylibre.com>, <martin.blumenstingl@googlemail.com>, <avifishman70@gmail.com>, <tmaimon77@gmail.com>, <tali.perry1@gmail.com>, <venture@google.com>, <yuenn@google.com>, <benjaminfair@google.com>, <yogeshgaur.83@gmail.com>, <konrad.dybcio@somainline.org>, <alim.akhtar@samsung.com>, <ldewangan@nvidia.com>, <michal.simek@amd.com>, <linux-aspeed@lists.ozlabs.org>, <openbmc@lists.ozlabs.org>, <linux-arm-kernel@lists.infradead.org>, <linux-rpi-kernel@lists.infradead.org>, <linux-amlogic@lists.infradead.org>, <linux-mediatek@lists.infradead.org>, <linux-arm-msm@vger.kernel.org>, <linux-rockchip@lists.infradead.org>, <linux-samsung-soc@vger.kernel.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-sunxi@lists.linux.dev>, <linux-tegra@vger.kernel.org>, <netdev@vger.kernel.org>, <linux-wpan@vger.kernel.org>, <libertas-dev@lists.infradead.org>, <linux-wireless@vger.kernel.org>, <linux-mtd@lists.infradead.org>, <lars@metafoo.de>, <Michael.Hennerich@analog.com>, <linux-iio@vger.kernel.org>, <michael@walle.cc>, <palmer@dabbelt.com>, <linux-riscv@lists.infradead.org>, <linux-media@vger.kernel.org>, <dri-devel@lists.freedesktop.org>, <greybus-dev@lists.linaro.org>, <linux-staging@lists.linux.dev>, <amitrkcian2002@gmail.com> Subject: [PATCH v2 11/13] spi: spi-zynqmp-gqspi: Add stacked memories support in GQSPI driver Date: Fri, 20 Jan 2023 00:23:40 +0530 Message-ID: <20230119185342.2093323-12-amit.kumar-mahapatra@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230119185342.2093323-1-amit.kumar-mahapatra@amd.com> References: <20230119185342.2093323-1-amit.kumar-mahapatra@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00001A61:EE_|SJ2PR12MB8062:EE_ X-MS-Office365-Filtering-Correlation-Id: 053d0898-e38f-4697-ea81-08dafa4f36d0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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spi: Add support for stacked/parallel memories
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expand
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diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index 319cdd5a0bdc..4759f704bf5c 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 {
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@amd.com> --- drivers/spi/spi-zynqmp-gqspi.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)