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Subject[PATCH v3 2/5] dt-bindings: clock: add rk3399 DDR3 standard speed bins.
Date
DDR3 SDRAM Standard (JESD79-3F) defines some standard speed bins for
DDR3 memories. The rk3399_dmc driver allows you to pass these values via
the device tree. For that purpose the devfreq/rk3399_dmc.txt binding
refers to a ddr.h file which does not exist. This patch adds the missing
defines in a include file called rk3399-ddr.h with the definition of
standard speed bins according to the ARM Trusted Firmware (ATF).

Fixes: c1ceb8f7c167 (Documentation: bindings: add dt documentation for rk3399 dmc)
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---

Changes in v3: None
Changes in v2:
- [2/6] Improved commit message.
- [2/6] Rename ddr.h to rk3399-ddr.h because is SoC specific.

.../bindings/devfreq/rk3399_dmc.txt | 2 +-
include/dt-bindings/clock/rk3399-ddr.h | 56 +++++++++++++++++++
2 files changed, 57 insertions(+), 1 deletion(-)
create mode 100644 include/dt-bindings/clock/rk3399-ddr.h

diff --git a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
index d83ef821d282..834637c7bae7 100644
--- a/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
+++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
@@ -19,7 +19,7 @@ Required properties:

Following properties relate to DDR timing:

-- rockchip,dram_speed_bin : Value reference include/dt-bindings/clock/ddr.h,
+- rockchip,dram_speed_bin : Value reference include/dt-bindings/clock/rk3399-ddr.h,
it selects the DDR3 cl-trp-trcd type. It must be
set according to "Speed Bin" in DDR3 datasheet,
DO NOT use a smaller "Speed Bin" than specified
diff --git a/include/dt-bindings/clock/rk3399-ddr.h b/include/dt-bindings/clock/rk3399-ddr.h
new file mode 100644
index 000000000000..ed2280844963
--- /dev/null
+++ b/include/dt-bindings/clock/rk3399-ddr.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+
+#ifndef DT_BINDINGS_DDR_H
+#define DT_BINDINGS_DDR_H
+
+/*
+ * DDR3 SDRAM Standard Speed Bins include tCK, tRCD, tRP, tRAS and tRC for
+ * each corresponding bin.
+ */
+
+/* DDR3-800 (5-5-5) */
+#define DDR3_800D 0
+/* DDR3-800 (6-6-6) */
+#define DDR3_800E 1
+/* DDR3-1066 (6-6-6) */
+#define DDR3_1066E 2
+/* DDR3-1066 (7-7-7) */
+#define DDR3_1066F 3
+/* DDR3-1066 (8-8-8) */
+#define DDR3_1066G 4
+/* DDR3-1333 (7-7-7) */
+#define DDR3_1333F 5
+/* DDR3-1333 (8-8-8) */
+#define DDR3_1333G 6
+/* DDR3-1333 (9-9-9) */
+#define DDR3_1333H 7
+/* DDR3-1333 (10-10-10) */
+#define DDR3_1333J 8
+/* DDR3-1600 (8-8-8) */
+#define DDR3_1600G 9
+/* DDR3-1600 (9-9-9) */
+#define DDR3_1600H 10
+/* DDR3-1600 (10-10-10) */
+#define DDR3_1600J 11
+/* DDR3-1600 (11-11-11) */
+#define DDR3_1600K 12
+/* DDR3-1600 (10-10-10) */
+#define DDR3_1866J 13
+/* DDR3-1866 (11-11-11) */
+#define DDR3_1866K 14
+/* DDR3-1866 (12-12-12) */
+#define DDR3_1866L 15
+/* DDR3-1866 (13-13-13) */
+#define DDR3_1866M 16
+/* DDR3-2133 (11-11-11) */
+#define DDR3_2133K 17
+/* DDR3-2133 (12-12-12) */
+#define DDR3_2133L 18
+/* DDR3-2133 (13-13-13) */
+#define DDR3_2133M 19
+/* DDR3-2133 (14-14-14) */
+#define DDR3_2133N 20
+/* DDR3 ATF default */
+#define DDR3_DEFAULT 21
+
+#endif
--
2.17.0
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