Unverified Commit 25fb0e77 authored by Niravkumar L Rabara's avatar Niravkumar L Rabara Committed by Mark Brown
Browse files

spi: spi-cadence-qspi: Disable STIG mode for Altera SoCFPGA. 



STIG mode is enabled by default for less than 8 bytes data read/write.
STIG mode doesn't work with Altera SocFPGA platform due hardware
limitation.
Add a quirks to disable STIG mode for Altera SoCFPGA platform.

Signed-off-by: default avatarNiravkumar L Rabara <niravkumar.l.rabara@intel.com>
Link: https://patch.msgid.link/20241204063338.296959-1-niravkumar.l.rabara@intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 0bb39406

drivers/spi/spi-cadence-quadspi.c

+8 −2
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ static_assert(CQSPI_MAX_CHIPSELECT <= SPI_CS_CNT_MAX); 
#define CQSPI_SLOW_SRAM		BIT(4)

#define CQSPI_NEEDS_APB_AHB_HAZARD_WAR	BIT(5)

#define CQSPI_RD_NO_IRQ			BIT(6)

#define CQSPI_DISABLE_STIG_MODE		BIT(7)



/* Capabilities */

#define CQSPI_SUPPORTS_OCTAL		BIT(0)
@@ -103,6 +104,7 @@ struct cqspi_st { 
	bool			apb_ahb_hazard;



	bool			is_jh7110; /* Flag for StarFive JH7110 SoC */

	bool			disable_stig_mode;



	const struct cqspi_driver_platdata *ddata;

};
@@ -1416,7 +1418,8 @@ static int cqspi_mem_process(struct spi_mem *mem, const struct spi_mem_op *op) 
	 * reads, prefer STIG mode for such small reads.

	 */

		if (!op->addr.nbytes ||

		    op->data.nbytes <= CQSPI_STIG_DATA_LEN_MAX)

		    (op->data.nbytes <= CQSPI_STIG_DATA_LEN_MAX &&

		     !cqspi->disable_stig_mode))

			return cqspi_command_read(f_pdata, op);



		return cqspi_read(f_pdata, op);
@@ -1880,6 +1883,8 @@ static int cqspi_probe(struct platform_device *pdev) 
			if (ret)

				goto probe_reset_failed;

		}

		if (ddata->quirks & CQSPI_DISABLE_STIG_MODE)

			cqspi->disable_stig_mode = true;



		if (of_device_is_compatible(pdev->dev.of_node,

					    "xlnx,versal-ospi-1.0")) {
@@ -2043,7 +2048,8 @@ static const struct cqspi_driver_platdata intel_lgm_qspi = { 
static const struct cqspi_driver_platdata socfpga_qspi = {

	.quirks = CQSPI_DISABLE_DAC_MODE

			| CQSPI_NO_SUPPORT_WR_COMPLETION

			| CQSPI_SLOW_SRAM,

			| CQSPI_SLOW_SRAM

			| CQSPI_DISABLE_STIG_MODE,

};



static const struct cqspi_driver_platdata versal_ospi = {