From: 周琰杰 (Zhou Yanjie) Date: Sat, 23 Apr 2022 14:38:43 +0000 (+0800) Subject: spi: ingenic: Add support for use GPIO as chip select line. X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e64e9ad267ca22ee3db6f9d7a02dc8400a23d4c8;p=linux.git spi: ingenic: Add support for use GPIO as chip select line. Add support for using GPIOs as chip select lines on Ingenic SoCs. Signed-off-by: 周琰杰 (Zhou Yanjie) Reviewed-by: Paul Cercueil Link: https://lore.kernel.org/r/1650724725-93758-2-git-send-email-zhouyanjie@wanyeetech.com Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-ingenic.c b/drivers/spi/spi-ingenic.c index 03077a7e11c85..e5faae54a957e 100644 --- a/drivers/spi/spi-ingenic.c +++ b/drivers/spi/spi-ingenic.c @@ -380,7 +380,7 @@ static int spi_ingenic_probe(struct platform_device *pdev) struct spi_controller *ctlr; struct ingenic_spi *priv; void __iomem *base; - int ret; + int num_cs, ret; pdata = of_device_get_match_data(dev); if (!pdata) { @@ -416,6 +416,9 @@ static int spi_ingenic_probe(struct platform_device *pdev) if (IS_ERR(priv->flen_field)) return PTR_ERR(priv->flen_field); + if (device_property_read_u32(dev, "num-cs", &num_cs)) + num_cs = 2; + platform_set_drvdata(pdev, ctlr); ctlr->prepare_transfer_hardware = spi_ingenic_prepare_hardware; @@ -429,7 +432,9 @@ static int spi_ingenic_probe(struct platform_device *pdev) ctlr->bits_per_word_mask = pdata->bits_per_word_mask; ctlr->min_speed_hz = 7200; ctlr->max_speed_hz = 54000000; - ctlr->num_chipselect = 2; + ctlr->use_gpio_descriptors = true; + ctlr->max_native_cs = 2; + ctlr->num_chipselect = num_cs; ctlr->dev.of_node = pdev->dev.of_node; if (spi_ingenic_request_dma(ctlr, dev))