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Tue, 23 Apr 2019 10:46:22 +0000 Received: from AM6PR04MB5016.eurprd04.prod.outlook.com ([fe80::b953:a9de:d0bf:7159]) by AM6PR04MB5016.eurprd04.prod.outlook.com ([fe80::b953:a9de:d0bf:7159%5]) with mapi id 15.20.1813.017; Tue, 23 Apr 2019 10:46:22 +0000 From: Clark Wang To: "broonie@kernel.org" CC: "linux-spi@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: [PATCH 2/3] spi: lpspi: add multi SS support in PIO mode Thread-Topic: [PATCH 2/3] spi: lpspi: add multi SS support in PIO mode Thread-Index: AQHU+cHKq71me01A3EuIkqhmibfqDQ== Date: Tue, 23 Apr 2019 10:46:22 +0000 Message-ID: <20190423104649.24483-3-xiaoning.wang@nxp.com> References: <20190423104649.24483-1-xiaoning.wang@nxp.com> In-Reply-To: <20190423104649.24483-1-xiaoning.wang@nxp.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: KU1PR03CA0048.apcprd03.prod.outlook.com (2603:1096:802:19::36) To AM6PR04MB5016.eurprd04.prod.outlook.com (2603:10a6:20b:9::24) x-mailer: git-send-email 2.17.1 authentication-results: spf=none (sender IP is ) smtp.mailfrom=xiaoning.wang@nxp.com; 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Signed-off-by: Clark Wang Acked-by: Fugang Duan --- drivers/spi/spi-fsl-lpspi.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 19040b5ef349..a8e83cb96f61 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -841,7 +841,7 @@ static int fsl_lpspi_probe(struct platform_device *pdev) struct spi_imx_master *lpspi_platform_info = dev_get_platdata(&pdev->dev); struct resource *res; - int i, ret, irq; + int i, ret, irq, num_cs; u32 temp; bool is_slave; @@ -863,6 +863,16 @@ static int fsl_lpspi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, controller); + ret = of_property_read_u32(np, "fsl,spi-num-chipselects", &num_cs); + if (ret < 0) { + if (lpspi_platform_info) { + num_cs = lpspi_platform_info->num_chipselect; + controller->num_chipselect = num_cs; + } + } else { + controller->num_chipselect = num_cs; + } + fsl_lpspi = spi_controller_get_devdata(controller); fsl_lpspi->dev = &pdev->dev; fsl_lpspi->is_slave = is_slave;