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staging: wfx: load the firmware faster 

During the loading of the firmware, the WFX_DCA_GET register provide the
number available bytes in the receiving buffer. It is not necessary to
access to the WFX_DCA_GET after sent of each firmware fragment.

This patch allows to send the firmware:
  - in 64ms instead of 130ms using SDIO bus
  - in 78ms instead of 115ms using SPI bus

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200701150707.222985-6-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jérôme Pouiller 2020-07-01 17:06:59 +02:00 committed by Greg Kroah-Hartman
parent b64d1054bc
commit a9408ad79f
1 changed files with 4 additions and 5 deletions
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9
drivers/staging/wfx/fwio.c
View File

@ -188,15 +188,14 @@ static int upload_firmware(struct wfx_dev *wdev, const u8 *data, size_t len)
while (offs < len) {
start = ktime_get();
for (;;) {
ret = sram_reg_read(wdev, WFX_DCA_GET, &bytes_done);
if (ret < 0)
return ret;
now = ktime_get();
if (offs +
DNLD_BLOCK_SIZE - bytes_done < DNLD_FIFO_SIZE)
if (offs + DNLD_BLOCK_SIZE - bytes_done < DNLD_FIFO_SIZE)
break;
if (ktime_after(now, ktime_add_ms(start, DCA_TIMEOUT)))
return -ETIMEDOUT;
ret = sram_reg_read(wdev, WFX_DCA_GET, &bytes_done);
if (ret < 0)
return ret;
}
if (ktime_compare(now, start))
dev_dbg(wdev->dev, "answer after %lldus\n",