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spi: ingenic: Add support for use GPIO as chip select line.

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Add support for using GPIOs as chip select lines on Ingenic SoCs.

Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/1650724725-93758-2-git-send-email-zhouyanjie@wanyeetech.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
周琰杰 (Zhou Yanjie) 2022-04-23 22:38:43 +08:00 committed by Mark Brown
parent cc470d5534
commit e64e9ad267
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 2 deletions
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9
drivers/spi/spi-ingenic.c
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@ -380,7 +380,7 @@ static int spi_ingenic_probe(struct platform_device *pdev)
struct spi_controller *ctlr; struct spi_controller *ctlr;
struct ingenic_spi *priv; struct ingenic_spi *priv;
void __iomem *base; void __iomem *base;
int ret; int num_cs, ret;
pdata = of_device_get_match_data(dev); pdata = of_device_get_match_data(dev);
if (!pdata) { if (!pdata) {
@ -416,6 +416,9 @@ static int spi_ingenic_probe(struct platform_device *pdev)
if (IS_ERR(priv->flen_field)) if (IS_ERR(priv->flen_field))
return PTR_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); platform_set_drvdata(pdev, ctlr);
ctlr->prepare_transfer_hardware = spi_ingenic_prepare_hardware; 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->bits_per_word_mask = pdata->bits_per_word_mask;
ctlr->min_speed_hz = 7200; ctlr->min_speed_hz = 7200;
ctlr->max_speed_hz = 54000000; 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; ctlr->dev.of_node = pdev->dev.of_node;
if (spi_ingenic_request_dma(ctlr, dev)) if (spi_ingenic_request_dma(ctlr, dev))