Add support for using GPIOs as chip select lines on Ingenic SoCs.
Signed-off-by: 周琰杰 (Zhou Yanjie) <[email protected]>
Reviewed-by: Paul Cercueil <[email protected]>
---
Notes:
v1->v2:
Use "device_property_read_u32()" instead "of_property_read_u32()"
as Paul Cercueil's suggestion.
v2->v3:
Remove unnecessary "dev_warn()" as Paul Cercueil's suggestion.
drivers/spi/spi-ingenic.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi-ingenic.c b/drivers/spi/spi-ingenic.c
index 03077a7..e5faae5 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))
--
2.7.4