diff options
| author | Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com> | 2025-11-19 18:14:23 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-11-24 14:10:40 +0000 |
| commit | 8e89ee6cd2b928a8431bef61e8b851ce5df1ecb0 (patch) | |
| tree | c1cd307d03aa48da78a2f45644ce7fd8e38cefe2 | |
| parent | aead5ae91e4cbadac817d15737eca3b531237448 (diff) | |
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>
| -rw-r--r-- | drivers/spi/spi-rzv2h-rspi.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/spi/spi-rzv2h-rspi.c b/drivers/spi/spi-rzv2h-rspi.c index 09b9362e9b1f..7a7a576c17dd 100644 --- a/drivers/spi/spi-rzv2h-rspi.c +++ b/drivers/spi/spi-rzv2h-rspi.c @@ -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); |