dt-bindings: reset: Add PDC Global binding for SDM845 SoCs

Add PDC Global (Power Domain Controller) binding for SDM845 SoCs.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

diff --git a/Documentation/devicetree/bindings/reset/qcom,pdc-global.txt b/Documentation/devicetree/bindings/reset/qcom,pdc-global.txt
new file mode 100644 (file)
index 0000000..a62a492
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/qcom,pdc-global.txt
@@ -0,0 +1,52 @@
+PDC Global
+======================================
+
+This binding describes a reset-controller found on PDC-Global (Power Domain
+Controller) block for Qualcomm Technologies Inc SDM845 SoCs.
+
+Required properties:
+- compatible:
+       Usage: required
+       Value type: <string>
+       Definition: must be:
+                   "qcom,sdm845-pdc-global"
+
+- reg:
+       Usage: required
+       Value type: <prop-encoded-array>
+       Definition: must specify the base address and size of the register
+                   space.
+
+- #reset-cells:
+       Usage: required
+       Value type: <uint>
+       Definition: must be 1; cell entry represents the reset index.
+
+Example:
+
+pdc_reset: reset-controller@b2e0000 {
+       compatible = "qcom,sdm845-pdc-global";
+       reg = <0xb2e0000 0x20000>;
+       #reset-cells = <1>;
+};
+
+PDC reset clients
+======================================
+
+Device nodes that need access to reset lines should
+specify them as a reset phandle in their corresponding node as
+specified in reset.txt.
+
+For a list of all valid reset indices see
+<dt-bindings/reset/qcom,sdm845-pdc.h>
+
+Example:
+
+modem-pil@4080000 {
+       ...
+
+       resets = <&pdc_reset PDC_MODEM_SYNC_RESET>;
+       reset-names = "pdc_reset";
+
+       ...
+};

diff --git a/include/dt-bindings/reset/qcom,sdm845-pdc.h b/include/dt-bindings/reset/qcom,sdm845-pdc.h
new file mode 100644 (file)
index 0000000..53c37f9
--- /dev/null
+++ b/include/dt-bindings/reset/qcom,sdm845-pdc.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _DT_BINDINGS_RESET_PDC_SDM_845_H
+#define _DT_BINDINGS_RESET_PDC_SDM_845_H
+
+#define PDC_APPS_SYNC_RESET    0
+#define PDC_SP_SYNC_RESET      1
+#define PDC_AUDIO_SYNC_RESET   2
+#define PDC_SENSORS_SYNC_RESET 3
+#define PDC_AOP_SYNC_RESET     4
+#define PDC_DEBUG_SYNC_RESET   5
+#define PDC_GPU_SYNC_RESET     6
+#define PDC_DISPLAY_SYNC_RESET 7
+#define PDC_COMPUTE_SYNC_RESET 8
+#define PDC_MODEM_SYNC_RESET   9
+
+#endif