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Assign a different mtd->name for each mtd device to avoid this problem. After this change the output from /proc/mtd becomes: # cat /proc/mtd dev: size erasesize name mtd0: 01000000 00010000 "21e4000.qspi-0" mtd1: 01000000 00010000 "21e4000.qspi-1" In order to keep mtdparts compatibility keep the mtd->name unchanged when a single SPI NOR is present. Reported-by: David Wolfe Signed-off-by: Fabio Estevam Reviewed-by: Boris Brezillon --- Changes since v5: - Preserve the label value, if any. (Boris) drivers/mtd/spi-nor/fsl-quadspi.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c index 2901c7b..1038842 100644 --- a/drivers/mtd/spi-nor/fsl-quadspi.c +++ b/drivers/mtd/spi-nor/fsl-quadspi.c @@ -1051,6 +1051,24 @@ static int fsl_qspi_probe(struct platform_device *pdev) spi_nor_set_flash_node(nor, np); nor->priv = q; + if (q->nor_num > 1 && !mtd->name) { + int spiflash_idx; + + ret = of_property_read_u32(np, "reg", &spiflash_idx); + if (!ret) { + mtd->name = devm_kasprintf(dev, GFP_KERNEL, + "%s-%d", + dev_name(dev), + spiflash_idx); + if (!mtd->name) { + ret = -ENOMEM; + goto mutex_failed; + } + } else { + dev_warn(dev, "reg property is missing\n"); + } + } + /* fill the hooks */ nor->read_reg = fsl_qspi_read_reg; nor->write_reg = fsl_qspi_write_reg; From patchwork Thu Jan 18 14:28:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Estevam X-Patchwork-Id: 862939 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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Ip=[192.88.168.50]; Helo=[tx30smr01.am.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR03MB2361 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 T_SPF_PERMERROR SPF: test of record failed (permerror) -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fabio Estevam , han.xu@nxp.com, linux-mtd@lists.infradead.org, david.wolfe@nxp.com Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Improve the bindings example by adding an example of how to represent two SPI NOR devices. Signed-off-by: Fabio Estevam --- Changes since v5: - None .../devicetree/bindings/mtd/fsl-quadspi.txt | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/fsl-quadspi.txt b/Documentation/devicetree/bindings/mtd/fsl-quadspi.txt index 63d4d626..483e9cf 100644 --- a/Documentation/devicetree/bindings/mtd/fsl-quadspi.txt +++ b/Documentation/devicetree/bindings/mtd/fsl-quadspi.txt @@ -39,3 +39,27 @@ qspi0: quadspi@40044000 { .... }; }; + +Example showing the usage of two SPI NOR devices: + +&qspi2 { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_qspi2>; + status = "okay"; + + flash0: n25q256a@0 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "micron,n25q256a", "jedec,spi-nor"; + spi-max-frequency = <29000000>; + reg = <0>; + }; + + flash1: n25q256a@1 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "micron,n25q256a", "jedec,spi-nor"; + spi-max-frequency = <29000000>; + reg = <1>; + }; +};