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spi: mediatek: add mtk_spi_compatible support

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this patch adds max_fifo_size and must_rx compat support.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Link: https://lore.kernel.org/r/20210322055244.30179-4-leilk.liu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Leilk Liu 2021-03-22 13:52:43 +08:00 committed by Mark Brown
parent f42698a8dc
commit d666a833b0
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 24 additions and 4 deletions
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28
drivers/spi/spi-slave-mt27xx.c
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@ -10,6 +10,8 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/spi/spi.h>
#include <linux/of.h>
#define SPIS_IRQ_EN_REG 0x0
#define SPIS_IRQ_CLR_REG 0x4
@ -61,8 +63,6 @@
#define SPIS_DMA_ADDR_EN BIT(1)
#define SPIS_SOFT_RST BIT(0)
#define MTK_SPI_SLAVE_MAX_FIFO_SIZE 512U
struct mtk_spi_slave {
struct device *dev;
void __iomem *base;
@ -70,10 +70,19 @@ struct mtk_spi_slave {
struct completion xfer_done;
struct spi_transfer *cur_transfer;
bool slave_aborted;
const struct mtk_spi_compatible *dev_comp;
};
struct mtk_spi_compatible {
const u32 max_fifo_size;
bool must_rx;
};
static const struct mtk_spi_compatible mt2712_compat = {
.max_fifo_size = 512,
};
static const struct of_device_id mtk_spi_slave_of_match[] = {
{ .compatible = "mediatek,mt2712-spi-slave", },
{ .compatible = "mediatek,mt2712-spi-slave",
.data = (void *)&mt2712_compat,},
{}
};
MODULE_DEVICE_TABLE(of, mtk_spi_slave_of_match);
@ -272,7 +281,7 @@ static int mtk_spi_slave_transfer_one(struct spi_controller *ctlr,
mdata->slave_aborted = false;
mdata->cur_transfer = xfer;
if (xfer->len > MTK_SPI_SLAVE_MAX_FIFO_SIZE)
if (xfer->len > mdata->dev_comp->max_fifo_size)
return mtk_spi_slave_dma_transfer(ctlr, spi, xfer);
else
return mtk_spi_slave_fifo_transfer(ctlr, spi, xfer);
@ -369,6 +378,7 @@ static int mtk_spi_slave_probe(struct platform_device *pdev)
struct spi_controller *ctlr;
struct mtk_spi_slave *mdata;
int irq, ret;
const struct of_device_id *of_id;
ctlr = spi_alloc_slave(&pdev->dev, sizeof(*mdata));
if (!ctlr) {
@ -386,7 +396,17 @@ static int mtk_spi_slave_probe(struct platform_device *pdev)
ctlr->setup = mtk_spi_slave_setup;
ctlr->slave_abort = mtk_slave_abort;
of_id = of_match_node(mtk_spi_slave_of_match, pdev->dev.of_node);
if (!of_id) {
dev_err(&pdev->dev, "failed to probe of_node\n");
ret = -EINVAL;
goto err_put_ctlr;
}
mdata = spi_controller_get_devdata(ctlr);
mdata->dev_comp = of_id->data;
if (mdata->dev_comp->must_rx)
ctlr->flags = SPI_MASTER_MUST_RX;
platform_set_drvdata(pdev, ctlr);