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Message-ID: <087ba4df-7575-acce-309a-efb5115a987d@linaro.org>
Date: Thu, 20 Apr 2023 17:40:30 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Jaewon Kim <jaewon02.kim@...sung.com>,
Mark Brown <broonie@...nel.org>, Andi Shyti <andi@...zian.org>,
Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-spi@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Chanho Park <chanho61.park@...sung.com>
Subject: Re: [PATCH v2 1/4] spi: s3c64xx: changed to PIO mode if there is no
DMA
On 19/04/2023 08:06, Jaewon Kim wrote:
> Polling mode supported with qurik if there was no DMA in the SOC.
> However, there are cased where we cannot or do not want to use DMA.
> To support this case, if DMA is not set, it is switched to polling mode.
>
(...)
> #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
> -#define is_polling(x) (x->port_conf->quirks & S3C64XX_SPI_QUIRK_POLL)
> +#define is_polling(x) (x->cntrlr_info->polling)
>
> #define RXBUSY (1<<2)
> #define TXBUSY (1<<3)
> @@ -1067,6 +1066,11 @@ static struct s3c64xx_spi_info *s3c64xx_spi_parse_dt(struct device *dev)
> sci->num_cs = temp;
> }
>
> + if (!of_find_property(dev->of_node, "dmas", NULL)) {
of_property_present()
Best regards,
Krzysztof
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