From: Jaewon Kim <jaewon02.kim@samsung.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Mark Brown <broonie@kernel.org>, Andi Shyti <andi@etezian.org>,
Alim Akhtar <alim.akhtar@samsung.com>
Cc: linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Chanho Park <chanho61.park@samsung.com>
Subject: Re: [PATCH v2 0/4] Improves polling mode of s3c64xx driver
Date: Wed, 19 Apr 2023 17:29:18 +0900 [thread overview]
Message-ID: <a8541b6c-953f-adf5-2f39-f35a8162657f@samsung.com> (raw)
In-Reply-To: <c49881dc-f283-6981-3e03-02fb02b5ce54@linaro.org>
On 23. 4. 19. 16:59, Krzysztof Kozlowski wrote:
> On 19/04/2023 08:06, Jaewon Kim wrote:
>> 1.
>> s3cx64xx driver was supporting polling mode using quirk for SOC without DMA.
>> However, in order to use PIO mode as an optional rather than a quirk, when DMA
>> is not described, spi operates with pio mode rather than probe fail.
>>
>> 2.
>> Fixed the problem of high CPU usage in PIO mode.
>>
>> 3.
>> If the transfer data size is larger than 32-bit, IRQ base PIO mode used.
>>
> What changed in the patches? You need to provide changelog.
Oh, I missed changes while copy/pasting.
I will add changes v2 from v3 together.
Changes in V2.
- DeviceTree property not used to change PIO mod.
- Add cpu_releax() in polling loop
- Add lower limit in IRQ mode
>
> Best regards,
> Krzysztof
>
>
Thanks
Jaewon Kim
prev parent reply other threads:[~2023-04-19 8:32 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20230419062755epcas2p4c3c7c1e0d58e964f6e884f75ae120d91@epcas2p4.samsung.com>
2023-04-19 6:06 ` [PATCH v2 0/4] Improves polling mode of s3c64xx driver Jaewon Kim
[not found] ` <CGME20230419062755epcas2p1370c1ca60d88d6b114a7c7c1de3f15c0@epcas2p1.samsung.com>
2023-04-19 6:06 ` [PATCH v2 1/4] spi: s3c64xx: changed to PIO mode if there is no DMA Jaewon Kim
2023-04-19 8:03 ` Krzysztof Kozlowski
2023-04-19 8:31 ` Jaewon Kim
2023-04-19 8:36 ` Krzysztof Kozlowski
2023-04-19 15:46 ` Andi Shyti
2023-04-21 1:43 ` Jaewon Kim
2023-04-20 15:40 ` Krzysztof Kozlowski
2023-04-21 1:45 ` Jaewon Kim
[not found] ` <CGME20230419062755epcas2p43a646bbae5f01e3120331407ad873318@epcas2p4.samsung.com>
2023-04-19 6:06 ` [PATCH v2 2/4] spi: s3c64xx: add cpu_relax in polling loop Jaewon Kim
2023-04-19 8:14 ` Krzysztof Kozlowski
2023-04-19 11:13 ` Jaewon Kim
2023-04-20 15:39 ` Krzysztof Kozlowski
2023-04-21 1:45 ` Jaewon Kim
[not found] ` <CGME20230419062755epcas2p1bca14bbd5200ebe5241780d2d7ec1596@epcas2p1.samsung.com>
2023-04-19 6:06 ` [PATCH v2 3/4] spi: s3c64xx: add sleep during transfer Jaewon Kim
2023-04-19 8:19 ` Krzysztof Kozlowski
2023-04-19 9:41 ` Jaewon Kim
2023-04-19 15:56 ` Andi Shyti
2023-04-21 2:53 ` Jaewon Kim
[not found] ` <CGME20230419062755epcas2p43a1127f4bb28cf1cf3f42e5d3cc597cd@epcas2p4.samsung.com>
2023-04-19 6:06 ` [PATCH v2 4/4] spi: s3c64xx: support interrupt based pio mode Jaewon Kim
2023-04-19 8:21 ` Krzysztof Kozlowski
2023-04-19 9:45 ` Jaewon Kim
2023-04-20 15:37 ` Krzysztof Kozlowski
2023-04-19 16:03 ` Andi Shyti
2023-04-21 3:05 ` Jaewon Kim
2023-04-19 7:59 ` [PATCH v2 0/4] Improves polling mode of s3c64xx driver Krzysztof Kozlowski
2023-04-19 8:29 ` Jaewon Kim [this message]
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