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Thu, 25 Feb 2016 17:32:36 +0900 (KST) From: Pankaj Dubey To: linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RESPIN 5/6] dt-bindings: EXYNOS: Describe SROMc configuration Date: Thu, 25 Feb 2016 14:03:41 +0530 Message-id: <1456389222-12738-6-git-send-email-pankaj.dubey@samsung.com> X-Mailer: git-send-email 1.9.1 In-reply-to: <1456389222-12738-1-git-send-email-pankaj.dubey@samsung.com> References: <1456389222-12738-1-git-send-email-pankaj.dubey@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrELMWRmVeSWpSXmKPExsVy+t8zI12VPefCDNZ1aljMP3KO1eL1C0OL 3gVX2Sw2Pb7GanF51xw2ixnn9zFZnLr+mc3i1aVVbBaLtn5ht+hYxujA5bF5Sb3HlRNNrB59 W1YxenzeJBfAEsVlk5Kak1mWWqRvl8CVMfFJB3vBcfmKxXcmszQw/hLvYuTkkBAwkfi3cREj hC0mceHeerYuRi4OIYGVjBKtj6awwRQt+nCGBcQWEpjFKLFgFS9E0U9Giet3JrODJNgEdCWe vJ/LDGKLCGRLzN/bzQ5SxCywnVHi+aPvYJOEBdwl7j1tAStiEVCV+LpiJxOIzSvgIbHl0T2o M+QkTh6bzApicwp4Skw9uZgRYrOHxJ6TnUwQNavYJQ63BEDMEZD4NvkQ0HUcQHFZiU0HmCFK JCUOrrjBMoFReAEjwypG0dSC5ILipPQiU73ixNzi0rx0veT83E2MkKCfuIPx/gHrQ4wCHIxK PLwMP8+GCbEmlhVX5h5iNAXaMJFZSjQ5HxhbeSXxhsZmRhamJqbGRuaWZkrivDrSP4OFBNIT S1KzU1MLUovii0pzUosPMTJxcEo1MHZV7DyWL57A/f+B34r7k46/0hI/cEbw8K+sXwmxvum6 IYxcu9pkxZ5dMrb7odk722q+3nud/dZJ/6U22DEYBTUFVfy6vs98UsPcvN6b3cf2SIXKP+1O ttFmWmnbHf0rr+/x1HvnBNNTXb0N/wbnujJXqEa/1P0edOY1k1lup7hC58ovnJVHlViKMxIN tZiLihMB6JA4dXUCAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrAIsWRmVeSWpSXmKPExsVy+t9jQV2VPefCDO43K1vMP3KO1eL1C0OL 3gVX2Sw2Pb7GanF51xw2ixnn9zFZnLr+mc3i1aVVbBaLtn5ht+hYxujA5bF5Sb3HlRNNrB59 W1YxenzeJBfAEtXAaJORmpiSWqSQmpecn5KZl26r5B0c7xxvamZgqGtoaWGupJCXmJtqq+Ti E6DrlpkDdI6SQlliTilQKCCxuFhJ3w7ThNAQN10LmMYIXd+QILgeIwM0kLCOMWPikw72guPy FYvvTGZpYPwl3sXIySEhYCKx6MMZFghbTOLCvfVsILaQwCxGiQWreLsYuYDsn4wS1+9MZgdJ sAnoSjx5P5cZxBYRyJaYv7ebHaSIWWA7o8TzR9/BuoUF3CXuPW0BK2IRUJX4umInE4jNK+Ah seXRPUaIbXISJ49NZgWxOQU8JaaeXMwIsdlDYs/JTqYJjLwLGBlWMUqkFiQXFCel5xrmpZbr FSfmFpfmpesl5+duYgTH1jOpHYwHd7kfYhTgYFTi4WX4eTZMiDWxrLgy9xCjBAezkgjv+cXn woR4UxIrq1KL8uOLSnNSiw8xmgIdNpFZSjQ5Hxj3eSXxhsYmZkaWRmYWRibm5krivI//rwsT EkhPLEnNTk0tSC2C6WPi4JRqYEzLzI1zk6jLcftxy+vZxj/s6/ztWEOiC67duuH1IHnqGUZ+ q/OXJlmULYm8mLbR5VpON/vN5AdxUyebnv8yL3dqaX7Jz4LQF5L7VC6W2rGsbxfefP+CiuyV fEadtY5uTpcTTcRnpbersq1zFr95b0eiXsLUuJyeFfeOXSiKYPF/zBjL4VTnrcRSnJFoqMVc VJwIAPFakNHDAgAA DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160225_003308_813637_ABC3B2FC X-CRM114-Status: GOOD ( 16.32 ) X-Spam-Score: -6.9 (------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, k.kozlowski@samsung.com, kgene.kim@samsung.com, Pankaj Dubey , p.fedin@samsung.com, thomas.ab@samsung.com, olof@lixom.net MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pavel Fedin Add documentation for new subnode properties, allowing bank configuration. Based on u-boot implementation, but heavily reworked. Also, fix size of SROMc mapping in the example. CC: devicetree@vger.kernel.org Signed-off-by: Pavel Fedin Signed-off-by: Pankaj Dubey Reviewed-by: Krzysztof Kozlowski Acked-by: Rob Herring Signed-off-by: Krzysztof Kozlowski --- .../bindings/memory-controllers/exynos-srom.txt | 73 +++++++++++++++++++++- 1 file changed, 71 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/memory-controllers/exynos-srom.txt b/Documentation/devicetree/bindings/memory-controllers/exynos-srom.txt index 33886d5..e5c18df 100644 --- a/Documentation/devicetree/bindings/memory-controllers/exynos-srom.txt +++ b/Documentation/devicetree/bindings/memory-controllers/exynos-srom.txt @@ -5,8 +5,77 @@ Required properties: - reg: offset and length of the register set -Example: +Optional properties: +The SROM controller can be used to attach external peripherals. In this case +extra properties, describing the bus behind it, should be specified as below: + +- #address-cells: Must be set to 2 to allow device address translation. + Address is specified as (bank#, offset). + +- #size-cells: Must be set to 1 to allow device size passing + +- ranges: Must be set up to reflect the memory layout with four integer values + per bank: + 0 + +Sub-nodes: +The actual device nodes should be added as subnodes to the SROMc node. These +subnodes, except regular device specification, should contain the following +properties, describing configuration of the relevant SROM bank: + +Required properties: +- reg: bank number, base address (relative to start of the bank) and size of + the memory mapped for the device. Note that base address will be + typically 0 as this is the start of the bank. + +- samsung,srom-timing : array of 6 integers, specifying bank timings in the + following order: Tacp, Tcah, Tcoh, Tacc, Tcos, Tacs. + Each value is specified in cycles and has the following + meaning and valid range: + Tacp : Page mode access cycle at Page mode (0 - 15) + Tcah : Address holding time after CSn (0 - 15) + Tcoh : Chip selection hold on OEn (0 - 15) + Tacc : Access cycle (0 - 31, the actual time is N + 1) + Tcos : Chip selection set-up before OEn (0 - 15) + Tacs : Address set-up before CSn (0 - 15) + +Optional properties: +- reg-io-width : data width in bytes (1 or 2). If omitted, default of 1 is used. + +- samsung,srom-page-mode : page mode configuration for the bank: + 0 - normal (one data) + 1 - four data + If omitted, default of 0 is used. + +Example: basic definition, no banks are configured + sromc@12570000 { + compatible = "samsung,exynos-srom"; + reg = <0x12570000 0x14>; + }; + +Example: SROMc with SMSC911x ethernet chip on bank 3 sromc@12570000 { + #address-cells = <2>; + #size-cells = <1>; + ranges = <0 0 0x04000000 0x20000 // Bank0 + 1 0 0x05000000 0x20000 // Bank1 + 2 0 0x06000000 0x20000 // Bank2 + 3 0 0x07000000 0x20000>; // Bank3 + compatible = "samsung,exynos-srom"; - reg = <0x12570000 0x10>; + reg = <0x12570000 0x14>; + + ethernet@3,0 { + compatible = "smsc,lan9115"; + reg = <3 0 0x10000>; // Bank 3, offset = 0 + phy-mode = "mii"; + interrupt-parent = <&gpx0>; + interrupts = <5 8>; + reg-io-width = <2>; + smsc,irq-push-pull; + smsc,force-internal-phy; + + samsung,srom-page-mode = <1>; + samsung,srom-timing = <9 12 1 9 1 1>; + }; };