Commit a9408ad7 authored Jul 01, 2020 by Jérôme Pouiller Committed by Greg Kroah-Hartman Jul 03, 2020

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>

parent b64d1054

drivers/staging/wfx/fwio.c

+4 −5

Original line number	Diff line number	Diff line
		@@ -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",

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