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Wed, 19 Apr 2023 17:31:43 +0900 (KST) Received: from [10.229.8.168] (unknown [10.229.8.168]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20230419083142epsmtip12d0e29281d16f57a5d4fd5175e5e4f8a~XSN21r-YI0112801128epsmtip1X; Wed, 19 Apr 2023 08:31:42 +0000 (GMT) Message-ID: Date: Wed, 19 Apr 2023 17:29:18 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Subject: Re: [PATCH v2 0/4] Improves polling mode of s3c64xx driver To: Krzysztof Kozlowski , Mark Brown , Andi Shyti , Alim Akhtar 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 Content-Language: en-US From: Jaewon Kim In-Reply-To: X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrEJsWRmVeSWpSXmKPExsWy7bCmue77ZfYpBkffylk8mLeNzWLxj+dM FlMfPmGzuLxf22Lv663sFpseX2O1uLxrDpvFjPP7mCwaP95kd+D0uL7kE7PHplWdbB53ru1h 89i8pN6jb8sqRo/Pm+QC2KKybTJSE1NSixRS85LzUzLz0m2VvIPjneNNzQwMdQ0tLcyVFPIS c1NtlVx8AnTdMnOAblJSKEvMKQUKBSQWFyvp29kU5ZeWpCpk5BeX2CqlFqTkFJgX6BUn5haX 5qXr5aWWWBkaGBiZAhUmZGfMv3+eueAcW8WCvbtZGhg7WbsYOTgkBEwkbq506mLk4hAS2MEo cXXxR3YI5xOjRPvOFkYI5zOjxNTNLWxdjJxgHU+/PWeBSOxilDjU8Biq5TWjxN+p7xhBqngF 7CReXbnLBGKzCKhK3Fr3khUiLihxcuYTFhBbVCBaYvG+KWC2sICzxLSHm8GmiggsZpToe/yJ DcRhFtjIKLG5aSo7SBWzgLjErSfzwaayCWhLfF+/GGwqJ9C2B0+WMUPUyEtsfzuHGeLWmRwS d/+wQXzqIrGkjwUiLCzx6vgWdghbSuJlfxuUnS3RPv0PK4RdIXFxw2yol40lZj1rZwQZwyyg KbF+lz7ERGWJI7dYIJbySXQc/ssOEeaV6GgTgmhUk7g/9RzUEBmJSUdWMkGUeEi82lw1gVFx FlKYzELy4Swkn8xCWLuAkWUVo1hqQXFuemqxUYEJPKqT83M3MYITq5bHDsbZbz/oHWJk4mA8 xCjBwawkwnvG1SpFiDclsbIqtSg/vqg0J7X4EKMpMGYmMkuJJucDU3teSbyhiaWBiZmZobmR qYG5kjjvxw7lFCGB9MSS1OzU1ILUIpg+Jg5OqQamsg/+L867TT/UqyfFfNng6O7Qa6nbdv75 z+WhGXM06ttsw7q8w6af9zPqHJMr/9CTZzd377r2YplFUjPWpe2yPRHo/G6i4o3nu+w+z0re mPJnn9ls8bhPGov3FiSrnUtWPbP9VbbzFG7xzX3inPa7P1Rn3bgVdUAwcrnIq78fuu31f5zq aBNvD1J1Czwt907k3HROvcZdrIq7VXuN53WHyVvct/LYda7P1ueFgEx90G7uGes05obMTf3F saTq+XpeUaP8U9HHhHS4bh6eWrIx+nX6XMU7Dn5Hputt2H47yPT1j06Ge/Ojta7PzdOdvNxs x9G1X9ZJvux1+h2/k0nn5/Kek2f1XkbtfNNho7O0XImlOCPRUIu5qDgRALu93fQ1BAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpjkeLIzCtJLcpLzFFi42LZdlhJTvf9MvsUg57ZzBYP5m1js1j84zmT xdSHT9gsLu/Xttj7eiu7xabH11gtLu+aw2Yx4/w+JovGjzfZHTg9ri/5xOyxaVUnm8eda3vY PDYvqffo27KK0ePzJrkAtigum5TUnMyy1CJ9uwSujPn3zzMXnGOrWLB3N0sDYydrFyMnh4SA icTTb89ZQGwhgR2MEs3z5CDiMhLLn/WxQdjCEvdbjgDVcwHVvGSUuNm1BayZV8BO4tWVu0wg NouAqsStdS+h4oISJ2c+ARsqKhAtcWP5N7AaYQFniWkPN7OADBIRWMwo0XHpLTuIwyywkVFi 5fX1zBArjgKtWHEUrJ1ZQFzi1pP5YO1sAtoS39cvBlvBCbT6wZNlzBA1ZhJdW7sYIWx5ie1v 5zBPYBSaheSSWUhGzULSMgtJywJGllWMkqkFxbnpucWGBUZ5qeV6xYm5xaV56XrJ+bmbGMFR paW1g3HPqg96hxiZOBgPMUpwMCuJ8J5xtUoR4k1JrKxKLcqPLyrNSS0+xCjNwaIkznuh62S8 kEB6YklqdmpqQWoRTJaJg1Oqgckt0XcuQ4qi8NtDvzvPO1r9cklfxf00Z/4tw1kO/+61ZK7g OCgwuWeW81wJ1w+1B1ZemGB1yIHDWuF4yMVfXjdtBFz9el3ktbi9eLzza5065CZo6ihVnL8n ZJIrmO7Rtoy33Cyh1Jc58KAKU/scPnHtBo9Sy8tTHzR/SM9Y8URDNHKuwPRFPul3VGu52pke TX960fAem1LoJYm9rm86fdYKbP/k+6JKtlCYwyX9Oc/k84eLvz4vfah67/sD3WmzxSReFTb4 vIjU/h13zOPVnMXmNertXWtvitSmKIVZ7HqwUdhC4XzalumLA45tEtLecd74z9wDz1RF+tae /DVXIXfhhPvaUUE80q89rrh5K7EUZyQaajEXFScCAIma6cUZAwAA X-CMS-MailID: 20230419083143epcas2p1b8a04a72e602714b72f1541acb41b8af X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230419062755epcas2p4c3c7c1e0d58e964f6e884f75ae120d91 References: <20230419060639.38853-1-jaewon02.kim@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230419_013154_168695_31479986 X-CRM114-Status: GOOD ( 17.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel