Unverified Commit 8e89ee6c authored by Cosmin Tanislav's avatar Cosmin Tanislav Committed by Mark Brown
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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: default avatarCosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Link: https://patch.msgid.link/20251119161434.595677-3-cosmin-gabriel.tanislav.xa@renesas.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent aead5ae9

drivers/spi/spi-rzv2h-rspi.c

+13 −3
Original line number Diff line number Diff line
@@ -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);