[PATCH v3 2/3] spi: s3c64xx: add sleep during transfer

[Krzysztof Kozlowski]

On 02/05/2023 08:28, Jaewon Kim wrote:
> In polling mode, the status register is continuously read to check data
> transfer completion. It can cause excessive CPU usage.
> To reduce this, we can calculate the transfer time and put the sleep during
> transfer.
> 
> When test on ExynosAuto9 SADK board, throughput remained the same, but
> 100% CPU utilization decreased to 40%.
> 
> Signed-off-by: Jaewon Kim <jaewon02.kim at samsung.com>
> ---

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

Best regards,
Krzysztof