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https://github.com/archlinuxarm/PKGBUILDs.git
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132 lines
4.6 KiB
Diff
132 lines
4.6 KiB
Diff
From bf131edcef6243ffad675d6aa010c89a8e0c7331 Mon Sep 17 00:00:00 2001
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From: Kumar Gala <galak@codeaurora.org>
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Date: Tue, 3 Mar 2015 15:39:07 -0600
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Subject: [PATCH 2/4] devicetree: bindings: Document qcom,msm-id and
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qcom,board-id
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The top level qcom,msm-id and qcom,board-id are utilized by bootloaders
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on Qualcomm MSM platforms to determine which device tree should be
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utilized and passed to the kernel.
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Cc: <devicetree@vger.kernel.org>
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Signed-off-by: Kumar Gala <galak@codeaurora.org>
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---
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Documentation/devicetree/bindings/arm/msm/ids.txt | 65 +++++++++++++++++++++++
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include/dt-bindings/arm/qcom-ids.h | 33 ++++++++++++
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2 files changed, 98 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/arm/msm/ids.txt
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create mode 100644 include/dt-bindings/arm/qcom-ids.h
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diff --git a/Documentation/devicetree/bindings/arm/msm/ids.txt b/Documentation/devicetree/bindings/arm/msm/ids.txt
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new file mode 100644
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index 0000000..9ee8428
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/arm/msm/ids.txt
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@@ -0,0 +1,65 @@
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+* MSM-ID
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+
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+The qcom,msm-id entry specifies the MSM chipset and hardware revision. It can
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+optionally be an array of these to indicate multiple hardware that use the same
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+device tree. It is expected that the bootloader will use this information at
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+boot-up to decide which device tree to use when given multiple device trees,
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+some of which may not be compatible with the actual hardware. It is the
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+bootloader's responsibility to pass the correct device tree to the kernel.
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+
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+PROPERTIES
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+
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+- qcom,msm-id:
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+ Usage: required
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+ Value type: <prop-encoded-array> (<chipset_id, rev_id> [, <c2, r2> ..])
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+ Definition:
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+ The "chipset_id" consists of three fields as below:
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+
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+ bits 0-15 = The unique MSM chipset id.
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+ bits 16-31 = Reserved. Should be 0
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+
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+ chipset_id is an exact match value
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+
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+ The "rev_id" is a chipset specific 32-bit id that represents
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+ the version of the chipset.
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+
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+ The rev_id is a best match id. The bootloader will look for
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+ the closest possible patch.
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+
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+* BOARD-ID
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+
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+The qcom,board-id entry specifies the board type and revision information. It
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+can optionally be an array of these to indicate multiple boards that use the
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+same device tree. It is expected that the bootloader will use this information
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+at boot-up to decide which device tree to use when given multiple device trees,
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+some of which may not be compatible with the actual hardware. It is the
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+bootloader's responsibility to pass the correct device tree to the kernel.
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+
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+PROPERTIES
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+
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+- qcom,board-id:
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+ Usage: required
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+ Value type: <prop-encoded-array> (<board_id, subtype_id> [, <b2, s2> ..])
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+ Definition:
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+ The "board_id" consists of three fields as below:
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+
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+ bits 31-24 = Unusued.
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+ bits 23-16 = Platform Version Major
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+ bits 15-8 = Platfrom Version Minor
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+ bits 7-0 = Platform Type
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+
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+ Platform Type field is an exact match value. The Platform
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+ Major/Minor field is a best match. The bootloader will look
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+ for the closest possible match.
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+
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+ The "subtype_id" is unique to a Platform Type/Chipset ID. For
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+ a given Platform Type, there will typically only be a single
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+ board and the subtype_id will be 0. However in some cases board
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+ variants may need to be distinquished by different subtype_id
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+ values.
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+
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+ subtype_id is an exact match value.
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+
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+EXAMPLE:
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+ qcom,board-id = <15 2>;
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+ qcom,msm-id = <0x1007e 0>;
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diff --git a/include/dt-bindings/arm/qcom-ids.h b/include/dt-bindings/arm/qcom-ids.h
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new file mode 100644
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index 0000000..a18f34e
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--- /dev/null
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+++ b/include/dt-bindings/arm/qcom-ids.h
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@@ -0,0 +1,33 @@
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+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 and
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+ * only version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+#ifndef __DT_BINDINGS_QCOM_IDS_H
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+#define __DT_BINDINGS_QCOM_IDS_H
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+
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+/* qcom,msm-id */
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+#define QCOM_ID_MSM8916 206
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+#define QCOM_ID_APQ8016 247
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+#define QCOM_ID_MSM8216 248
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+#define QCOM_ID_MSM8116 249
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+#define QCOM_ID_MSM8616 250
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+
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+/* qcom,board-id */
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+#define QCOM_BRD_ID(a, major, minor) \
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+ (((major & 0xff) << 16) | ((minor & 0xff) << 8) | QCOM_BRD_ID_##a)
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+
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+#define QCOM_BRD_ID_MTP 8
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+#define QCOM_BRD_ID_DRAGONBRD 10
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+#define QCOM_BRD_ID_SBC 24
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+
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+#define QCOM_BRD_SUBTYPE_DEFAULT 0
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+#define QCOM_BRD_SUBTYPE_MTP8916_SMB1360 1
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+
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+#endif
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--
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2.7.0
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