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Wed, 19 Apr 2023 15:27:55 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas2p1.samsung.com (KnoxPortal) with ESMTPA id 20230419062755epcas2p1370c1ca60d88d6b114a7c7c1de3f15c0~XQhxNQgMp1254712547epcas2p1D; Wed, 19 Apr 2023 06:27:55 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20230419062755epsmtrp16b19ddf937434c40320e1b50ed1e9587~XQhxMcZF62169721697epsmtrp1E; Wed, 19 Apr 2023 06:27:55 +0000 (GMT) X-AuditID: b6c32a45-e13fa700000026e9-50-643f89eba21d Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 0C.65.08279.AE98F346; Wed, 19 Apr 2023 15:27:55 +0900 (KST) Received: from localhost.localdomain (unknown [10.229.9.55]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230419062754epsmtip29dca3d187ac7f77ba5c31d8211f9c2a1~XQhw-k_mh0489404894epsmtip2r; Wed, 19 Apr 2023 06:27:54 +0000 (GMT) From: Jaewon Kim To: Mark Brown , Krzysztof Kozlowski , 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 , Jaewon Kim Subject: [PATCH v2 1/4] spi: s3c64xx: changed to PIO mode if there is no DMA Date: Wed, 19 Apr 2023 15:06:36 +0900 Message-Id: <20230419060639.38853-2-jaewon02.kim@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230419060639.38853-1-jaewon02.kim@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrPKsWRmVeSWpSXmKPExsWy7bCmue7rTvsUg3enTS0ezNvGZrH4x3Mm i6kPn7BZXN6vbbGj4Qirxd7XW9ktNj2+xmpxedccNosZ5/cxWTR+vMnuwOVxfcknZo9NqzrZ PO5c28PmsXlJvUffllWMHp83yQWwRWXbZKQmpqQWKaTmJeenZOal2yp5B8c7x5uaGRjqGlpa mCsp5CXmptoqufgE6Lpl5gAdpqRQlphTChQKSCwuVtK3synKLy1JVcjILy6xVUotSMkpMC/Q K07MLS7NS9fLSy2xMjQwMDIFKkzIzmg5fZG14DdfxYLf01gbGDfwdDFyckgImEh8WXSRuYuR i0NIYAejxNOGk6wgCSGBT0DO3iiIxDdGiS37+phgOpqXHWSDSOxllOhtOcQO4XxklHi46zs7 SBWbgLbE9/WLWUESIgKLGSX2/v0CtoRZ4AajRPebzSwgVcICPhIf515iA7FZBFQlpqy/DLaD V8BW4nNvLyvEPnmJ1RsOMIPYnAJ2Egs/XQPbLSHwiF3izdMlLBBFLhInGrvYIGxhiVfHt7BD 2FISL/vboOxsifbpf6CGVkhc3DAbqt5YYtazdsYuRg6g6zQl1u/SBzElBJQljtwCm84swCfR cfgvO0SYV6KjTQiiUU3i/tRzUENkJCYdWQkNIQ+JKx3boGE6kVHizuFP7BMY5WYhLFjAyLiK USy1oDg3PbXYqMAQHmXJ+bmbGMEpT8t1B+Pktx/0DjEycTAeYpTgYFYS4T3japUixJuSWFmV WpQfX1Sak1p8iNEUGHYTmaVEk/OBSTevJN7QxNLAxMzM0NzI1MBcSZxX2vZkspBAemJJanZq akFqEUwfEwenVANT6xFTh7UdYsGHjq+sqbJXn7296IhP603FyLZt8TduGS3wF2c7OF3qzKI1 MzIeH83jcxFxZbsqcuVRC/8PhQ1KJZFiGwsE2pnOfLmxzXz6+qqcGYlnshqepErdvuuTmrie e/Ojv33vnjel7Z1q8O32QUXpjeeMKs7LXL3+tvu17fpiK7P+x0pxW9+sORCxY9u3Ze37zDgX h2UGPUgSnXmdW1jc58emzasFhF6bJ/1vEvB/P//X9mUapxivvXPcfHd2vjDrji2KPmf/57as 2PjTo1PKxHWVfXSd6ob21/VPCyWi5Gq7mI/dT1/a4B0iwvHm/twH/BvFsj7bTync43rsl1Ww pH6z5To1/aaLYSXsSizFGYmGWsxFxYkAGsSYCAIEAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrFLMWRmVeSWpSXmKPExsWy7bCSvO7rTvsUg42vmSwezNvGZrH4x3Mm i6kPn7BZXN6vbbGj4Qirxd7XW9ktNj2+xmpxedccNosZ5/cxWTR+vMnuwOVxfcknZo9NqzrZ PO5c28PmsXlJvUffllWMHp83yQWwRXHZpKTmZJalFunbJXBltJy+yFrwm69iwe9prA2MG3i6 GDk5JARMJJqXHWTrYuTiEBLYzSix4vdcFoiEjMTyZ31sELawxP2WI6wQRe8ZJVb9vMwMkmAT 0Jb4vn4xK4gtIrCUUeJmtxRIEbPAPUaJl5O+MYEkhAV8JD7OvQQ2iUVAVWLK+stgcV4BW4nP vb2sEBvkJVZvOAA2lFPATmLhp2tg9UJANbvnvWWfwMi3gJFhFaNkakFxbnpusWGBYV5quV5x Ym5xaV66XnJ+7iZGcHBqae5g3L7qg94hRiYOxkOMEhzMSiK8Z1ytUoR4UxIrq1KL8uOLSnNS iw8xSnOwKInzXug6GS8kkJ5YkpqdmlqQWgSTZeLglGpgSjqTtKWlqWalw6wVmv6NZ1SnNxay f76Usu3/ot+T1r6wcN6QHz65//8d49vS0aclWhPNy9LdL6c9UpOMFVi/qi85gH3re3ehs7Fr /WSfyR97MqHwk6bplRdKJ9N0Ti/1MThqOok7amIcG7N2JofdNOFtzjkRyyrOH/5rcPr0uU6O LczPvj8Pevnhrn/bLfWgWT0rnX7/sTc0LLhrrST266ypTKHEDI8a5WOpLhyl+xx+7VaTqb+W nzlFlHOute2dglfsgmEzeppfZmf+6X1cEnhE48mEX2s/MxX7JX0yqtDK+vEwTKv8S+bG2To7 F07eai8yicfcUpT30uyDjde/ztLgnWM8z/S95P2vP9/cUGIpzkg01GIuKk4EAEGOHZm9AgAA X-CMS-MailID: 20230419062755epcas2p1370c1ca60d88d6b114a7c7c1de3f15c0 X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230419062755epcas2p1370c1ca60d88d6b114a7c7c1de3f15c0 References: <20230419060639.38853-1-jaewon02.kim@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org 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. Signed-off-by: Jaewon Kim --- drivers/spi/spi-s3c64xx.c | 8 ++++++-- include/linux/platform_data/spi-s3c64xx.h | 1 + 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 71d324ec9a70..273aa02322d9 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -19,7 +19,6 @@ #include #define MAX_SPI_PORTS 12 -#define S3C64XX_SPI_QUIRK_POLL (1 << 0) #define S3C64XX_SPI_QUIRK_CS_AUTO (1 << 1) #define AUTOSUSPEND_TIMEOUT 2000 @@ -116,7 +115,7 @@ #define S3C64XX_SPI_TRAILCNT S3C64XX_SPI_MAX_TRAILCNT #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)) { + dev_warn(dev, "cannot find DMA, changed to PIO mode\n"); + sci->polling = 1; + } + sci->no_cs = of_property_read_bool(dev->of_node, "no-cs-readback"); return sci; diff --git a/include/linux/platform_data/spi-s3c64xx.h b/include/linux/platform_data/spi-s3c64xx.h index 5df1ace6d2c9..cb7b8ddc899f 100644 --- a/include/linux/platform_data/spi-s3c64xx.h +++ b/include/linux/platform_data/spi-s3c64xx.h @@ -35,6 +35,7 @@ struct s3c64xx_spi_info { int src_clk_nr; int num_cs; bool no_cs; + bool polling; int (*cfg_gpio)(void); };