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Tue, 2 May 2023 15:50:25 +0900 (KST) Received: from epsmtrp2.samsung.com (unknown [182.195.40.14]) by epcas2p1.samsung.com (KnoxPortal) with ESMTPA id 20230502065025epcas2p16f5a02e6990d6f2b2257f001979ebcf9~bQOIIAqlX2045420454epcas2p1g; Tue, 2 May 2023 06:50:25 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20230502065025epsmtrp257d1b0d3cc600b53bd3239fd4365d404~bQOIHVFyF2944229442epsmtrp2L; Tue, 2 May 2023 06:50:25 +0000 (GMT) X-AuditID: b6c32a48-475ff70000005998-ab-6450b2b164e0 Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id D2.C8.27706.1B2B0546; Tue, 2 May 2023 15:50:25 +0900 (KST) Received: from localhost.localdomain (unknown [10.229.9.55]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20230502065025epsmtip1b3cc80aaa95a3bd11030231e839d2e77~bQOH5jt0l1187211872epsmtip1d; Tue, 2 May 2023 06:50:25 +0000 (GMT) From: Jaewon Kim To: Krzysztof Kozlowski , Andi Shyti , Mark Brown , 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 , Jaewon Kim Subject: [PATCH v3 0/3] Improve polling mode of s3c64xx driver Date: Tue, 2 May 2023 15:28:10 +0900 Message-Id: <20230502062813.112434-1-jaewon02.kim@samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrEKsWRmVeSWpSXmKPExsWy7bCmme7GTQEpBst+a1s8mLeNzWLxj+dM FlMfPmGzuLxf22JHwxFWi72vt7JbbHp8jdXi8q45bBYzzu9jsmj8eJPdgcvj+pJPzB6bVnWy edy5tofNY/OSeo++LasYPT5vkgtgi8q2yUhNTEktUkjNS85PycxLt1XyDo53jjc1MzDUNbS0 MFdSyEvMTbVVcvEJ0HXLzAE6TEmhLDGnFCgUkFhcrKRvZ1OUX1qSqpCRX1xiq5RakJJTYF6g V5yYW1yal66Xl1piZWhgYGQKVJiQnfFh3zz2gl/sFV8OfGBrYFzO1sXIySEhYCIx6fwlJhBb SGAHo8SVI0BxLiD7E6PEszm7GSGcb4wSe/79Z4HpmDlpLxNEYi+jxNbz/1ggnI+MElO3QFSx CWhLfF+/mBUkISKwmFFiwdWd7CAOs8ANRonuN5vBqoQF7CQWTfvMDmKzCKhK/Jp3FewSXqD4 z9aTUBfKS6zecIAZpFlC4Bi7xOWuqewQCReJdZ3TmSBsYYlXx7dAxaUkPr/bC9WcLdE+/Q8r hF0hcXHDbKi4scSsZ+1A33EAXaQpsX6XPogpIaAsceQW2GnMAnwSHYf/skOEeSU62oQgGtUk 7k89BzVERmLSkZVQB3hIHHr/gx0SjrESp+a2sk1glJ2FMH8BI+MqRrHUguLc9NRiowITeCwl 5+duYgQnNi2PHYyz337QO8TIxMF4iFGCg1lJhPdDoV+KEG9KYmVValF+fFFpTmrxIUZTYHBN ZJYSTc4Hpta8knhDE0sDEzMzQ3MjUwNzJXHejx3KKUIC6YklqdmpqQWpRTB9TBycUg1Mup2x nBtv3l3JUnJgW4bE7TQvrQ0l7xdVBCnZW4pM+vBXKCupZ+nMyPmaTuq/jlg4V17WENm2rN2p 4NHD4osXZwgfa3r/4ur/vVwzK7Z23d1zaGP5Ws+K6KxkUaXlc/jlaq8mMcqY783gmWS/psGm /H51PY/DZRW3nNwHS9W9LV0XX+cpb9kZpfTxcqXYkXWdaTLBvwJm312178Q57tuFt7kuCV54 76MlsaVLecOKm63zZvfxXHNxsj1du4xx2avHkwssbj+POxnT8UK8X2u6S9Pb9f8fq72Y5WYv 8V+34Lcas8nPG9PzNxts9F+UeyK//ZLR4oJFB88UpsaX/wzmTVso8/T3/lwPrbPl37dNUGIp zkg01GIuKk4EAK0SIjv1AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprMLMWRmVeSWpSXmKPExsWy7bCSnO7GTQEpBmsu8Vk8mLeNzWLxj+dM FlMfPmGzuLxf22JHwxFWi72vt7JbbHp8jdXi8q45bBYzzu9jsmj8eJPdgcvj+pJPzB6bVnWy edy5tofNY/OSeo++LasYPT5vkgtgi+KySUnNySxLLdK3S+DK+LBvHnvBL/aKLwc+sDUwLmfr YuTkkBAwkZg5aS9TFyMXh5DAbkaJr/MnsUAkZCSWP+uDKhKWuN9yhBWi6D2jxKPrP5lAEmwC 2hLf1y8GS4gILGWUeLznMQuIwyxwj1Hi5aRvYFXCAnYSi6Z9ZgexWQRUJX7NuwoW5wWK/2w9 CbVCXmL1hgPMExh5FjAyrGKUTC0ozk3PLTYsMMxLLdcrTswtLs1L10vOz93ECA43Lc0djNtX fdA7xMjEwXiIUYKDWUmE90OhX4oQb0piZVVqUX58UWlOavEhRmkOFiVx3gtdJ+OFBNITS1Kz U1MLUotgskwcnFINTMUNLM+/rGPvuXh/ZUb3i0s7r70+N/Vvg+q3k/c9ml7tmMEdcSA4Zb7o zYnbYw9e0yrYsi94r7az3lUhtbAbfy92exjc3xBsoh+xtpE17axOexqbgvdpR0eTvzyF9Zsj XLxvP5paY9jsnt6j3ptqICdefNxKart3f9rluMeb+Y+ITvu18l/19zUidUY/390M5uSRr2o0 FO84p/v1jcAtvvmdwoo5Bhv23DzcdzKw6RfDtojWarHfkTnBKYKS0ycnvWuZz5hWPrNy8e8Q Yd9lnRP+ZtVn5xwu9WB5dsbaIfqLme93t9Ni2xcKc0XeXvkoZdHqFVLPAnwin/8rijump/HQ dr96xoFg5dvM/Tz5SizFGYmGWsxFxYkAFe8ZnqYCAAA= X-CMS-MailID: 20230502065025epcas2p16f5a02e6990d6f2b2257f001979ebcf9 X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230502065025epcas2p16f5a02e6990d6f2b2257f001979ebcf9 References: Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Previously, polling mode was supported as quirk for SOC without DMA. In order to use it more flexibly, it is supported when there is no dmas property in devicetree, and the issue of using excessive CPU usage in polling mode is solved by adding sleep during transfer time and supporting interrupt mode. Changes in V3. - Fix patch commit message. - Change of_find_property() to of_property_present() with code cleanup - Remove cpu_relax() related patch. - Changes use_irq variable type to bool Changes in V2. - Switched to polling mode if there is no dmas property in devicetree. - Add cpu_releax() in polling loop - Add lower limit in IRQ mode Jaewon Kim (3): spi: s3c64xx: change polling mode to optional spi: s3c64xx: add sleep during transfer spi: s3c64xx: support interrupt based pio mode drivers/spi/spi-s3c64xx.c | 81 +++++++++++++++++++---- include/linux/platform_data/spi-s3c64xx.h | 1 + 2 files changed, 70 insertions(+), 12 deletions(-)