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spi: rzv2h-rspi: make FIFO size chip-specific 

The Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs have a
different FIFO size compared to RZ/V2H. Add a chip-specific structure,
and set the FIFO size inside it, to prepare for adding support for them.

Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Link: https://patch.msgid.link/20251119161434.595677-3-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cosmin Tanislav 2025-11-19 18:14:23 +02:00 committed by Mark Brown
parent aead5ae91e
commit 8e89ee6cd2
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 13 additions and 3 deletions
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16
drivers/spi/spi-rzv2h-rspi.c
View File

@ -58,7 +58,6 @@
/* Register SPDCR2 */
#define RSPI_SPDCR2_TTRG GENMASK(11, 8)
#define RSPI_SPDCR2_RTRG GENMASK(3, 0)
#define RSPI_FIFO_SIZE 16
/* Register SPSR */
#define RSPI_SPSR_SPRF BIT(15)
@ -69,9 +68,14 @@
#define RSPI_RESET_NUM 2
#define RSPI_CLK_NUM 3
struct rzv2h_rspi_info {
unsigned int fifo_size;
};
struct rzv2h_rspi_priv {
struct reset_control_bulk_data resets[RSPI_RESET_NUM];
struct spi_controller *controller;
const struct rzv2h_rspi_info *info;
void __iomem *base;
struct clk *tclk;
wait_queue_head_t wait;
@ -305,7 +309,7 @@ static int rzv2h_rspi_prepare_message(struct spi_controller *ctlr,
writeb(0, rspi->base + RSPI_SSLP);
/* Setup FIFO thresholds */
conf16 = FIELD_PREP(RSPI_SPDCR2_TTRG, RSPI_FIFO_SIZE - 1);
conf16 = FIELD_PREP(RSPI_SPDCR2_TTRG, rspi->info->fifo_size - 1);
conf16 |= FIELD_PREP(RSPI_SPDCR2_RTRG, 0);
writew(conf16, rspi->base + RSPI_SPDCR2);
@ -362,6 +366,8 @@ static int rzv2h_rspi_probe(struct platform_device *pdev)
rspi->controller = controller;
rspi->info = device_get_match_data(dev);
rspi->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(rspi->base))
return PTR_ERR(rspi->base);
@ -445,8 +451,12 @@ static void rzv2h_rspi_remove(struct platform_device *pdev)
reset_control_bulk_assert(RSPI_RESET_NUM, rspi->resets);
}
static const struct rzv2h_rspi_info rzv2h_info = {
.fifo_size = 16,
};
static const struct of_device_id rzv2h_rspi_match[] = {
{ .compatible = "renesas,r9a09g057-rspi" },
{ .compatible = "renesas,r9a09g057-rspi", &rzv2h_info },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, rzv2h_rspi_match);