On Fri, Feb 5, 2016 at 9:11 AM, qiujiang <qiuji...@huawei.com> wrote: > This patch added ACPI support for DesignWare SPI mmio driver. It > was based the corresponding DT driver and compatible for this two > way. This patch has been tested on Hisilicon D02 board. It relies > on the GPIO patchset.
My comments below. > @@ -84,8 +87,6 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) > dws->num_cs = num_cs; > > if (pdev->dev.of_node) { > - int i; > - > for (i = 0; i < dws->num_cs; i++) { > int cs_gpio = of_get_named_gpio(pdev->dev.of_node, > "cs-gpios", i); It seems the driver was never validated with more than one chip select. Perhaps someone has to switch to use of_spi_register_master() here. > @@ -104,6 +105,18 @@ static int dw_spi_mmio_probe(struct platform_device > *pdev) > } > } > > + if (ACPI_COMPANION(&pdev->dev)) { > + for (i = 0; i < dws->num_cs; i++) { > + snprintf(propname, sizeof(propname), "cs%d", i); > + gpiod = devm_gpiod_get(&pdev->dev, > + propname, GPIOD_ASIS); > + if (IS_ERR(gpiod)) { > + dev_err(&pdev->dev, "Get gpio desc > failed!\n"); > + return PTR_ERR(gpiod); > + } > + } > + } Like Mark noticed there is also same issue. Do you indeed check the configuration with different chip select signals? -- With Best Regards, Andy Shevchenko