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dt-bindings: clock: add rk3399 DDR3 standard speed bins.

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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: c1ceb8f7c1 (Documentation: bindings: add dt documentation for rk3399 dmc)
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Enric Balletbo i Serra 2018-05-09 14:57:44 +02:00 committed by MyungJoo Ham
parent 2d2894c94a
commit 49502b23e0
2 changed files with 57 additions and 1 deletions
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2
Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt
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@ -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

56
include/dt-bindings/clock/rk3399-ddr.h Normal file
View File

@ -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