korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-13 14:24:11 +08:00
Code Issues Packages Projects Releases Wiki Activity

spi: cadence-qspi: store device data pointer in private struct

Browse Source 
Avoid of_device_get_match_data() call on each IRQ and each read
operation. Store pointer in `struct cqspi_st` device instance.

End-to-end performance measurements improve with this patch. On a given
octal flash, reading 235M over UBIFS is ~3.4% faster. During that read,
the average cqspi_exec_mem_op() call goes from 85.4µs to 80.7µs
according to ftrace. The worst case goes from 622.4µs to 615.2µs.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://msgid.link/r/20240405-cdns-qspi-mbly-v2-4-956679866d6d@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Théo Lebrun 2024-04-05 17:02:14 +02:00 committed by Mark Brown
parent 708eafeba9
commit dcc594aef1
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/spi/spi-cadence-quadspi.c
View File

@ -102,6 +102,8 @@ struct cqspi_st {
bool apb_ahb_hazard;
bool is_jh7110; /* Flag for StarFive JH7110 SoC */
const struct cqspi_driver_platdata *ddata;
};
struct cqspi_driver_platdata {
@ -334,11 +336,8 @@ static u32 cqspi_get_versal_dma_status(struct cqspi_st *cqspi)
static irqreturn_t cqspi_irq_handler(int this_irq, void *dev)
{
struct cqspi_st *cqspi = dev;
const struct cqspi_driver_platdata *ddata = cqspi->ddata;
unsigned int irq_status;
struct device *device = &cqspi->pdev->dev;
const struct cqspi_driver_platdata *ddata;
ddata = of_device_get_match_data(device);
/* Read interrupt status */
irq_status = readl(cqspi->iobase + CQSPI_REG_IRQSTATUS);
@ -1358,16 +1357,13 @@ static ssize_t cqspi_read(struct cqspi_flash_pdata *f_pdata,
const struct spi_mem_op *op)
{
struct cqspi_st *cqspi = f_pdata->cqspi;
struct device *dev = &cqspi->pdev->dev;
const struct cqspi_driver_platdata *ddata;
const struct cqspi_driver_platdata *ddata = cqspi->ddata;
loff_t from = op->addr.val;
size_t len = op->data.nbytes;
u_char *buf = op->data.buf.in;
u64 dma_align = (u64)(uintptr_t)buf;
int ret;
ddata = of_device_get_match_data(dev);
ret = cqspi_read_setup(f_pdata, op);
if (ret)
return ret;
@ -1822,7 +1818,8 @@ static int cqspi_probe(struct platform_device *pdev)
/* write completion is supported by default */
cqspi->wr_completion = true;
ddata = of_device_get_match_data(dev);
ddata = of_device_get_match_data(dev);
cqspi->ddata = ddata;
if (ddata) {
if (ddata->quirks & CQSPI_NEEDS_WR_DELAY)
cqspi->wr_delay = 50 * DIV_ROUND_UP(NSEC_PER_SEC,