arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-tilapia-memory-timings.dtsi

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-tilapia-memory-timings.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/nvidia/tegra30-asus-nexus7-tilapia-memory-timings.dtsi
Extension
.dtsi
Size
11403 bytes
Lines
326
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0

#include "tegra30-asus-nexus7-grouper-memory-timings.dtsi"

/ {
	/*
	 * Tilapia's memory timings are pretty much the same as the Grouper's
	 * ones. There are few minor tunings made for a higher clock rates,
	 * these differentiating timings are overridden here for Tilapia.
	 */

	memory-controller@7000f400 {
		emc-timings-0 {
			timing-667000000 {
				clock-frequency = <667000000>;

				nvidia,emc-auto-cal-interval = <0x001fffff>;
				nvidia,emc-mode-1 = <0x80100002>;
				nvidia,emc-mode-2 = <0x80200018>;
				nvidia,emc-mode-reset = <0x80000b71>;
				nvidia,emc-zcal-cnt-long = <0x00000040>;
				nvidia,emc-cfg-periodic-qrst;

				nvidia,emc-configuration = <
					0x0000001f /* EMC_RC */
					0x00000069 /* EMC_RFC */
					0x00000017 /* EMC_RAS */
					0x00000007 /* EMC_RP */
					0x00000005 /* EMC_R2W */
					0x0000000c /* EMC_W2R */
					0x00000003 /* EMC_R2P */
					0x00000011 /* EMC_W2P */
					0x00000007 /* EMC_RD_RCD */
					0x00000007 /* EMC_WR_RCD */
					0x00000002 /* EMC_RRD */
					0x00000001 /* EMC_REXT */
					0x00000000 /* EMC_WEXT */
					0x00000007 /* EMC_WDV */
					0x0000000b /* EMC_QUSE */
					0x00000009 /* EMC_QRST */
					0x0000000b /* EMC_QSAFE */
					0x00000011 /* EMC_RDV */
					0x00001412 /* EMC_REFRESH */
					0x00000000 /* EMC_BURST_REFRESH_NUM */
					0x00000504 /* EMC_PRE_REFRESH_REQ_CNT */
					0x00000002 /* EMC_PDEX2WR */
					0x0000000e /* EMC_PDEX2RD */
					0x00000001 /* EMC_PCHG2PDEN */
					0x00000000 /* EMC_ACT2PDEN */
					0x0000000c /* EMC_AR2PDEN */
					0x00000016 /* EMC_RW2PDEN */
					0x00000072 /* EMC_TXSR */
					0x00000200 /* EMC_TXSRDLL */
					0x00000005 /* EMC_TCKE */
					0x00000015 /* EMC_TFAW */
					0x00000000 /* EMC_TRPAB */
					0x00000006 /* EMC_TCLKSTABLE */
					0x00000007 /* EMC_TCLKSTOP */
					0x00001453 /* EMC_TREFBW */
					0x0000000c /* EMC_QUSE_EXTRA */
					0x00000004 /* EMC_FBIO_CFG6 */
					0x00000000 /* EMC_ODT_WRITE */
					0x00000000 /* EMC_ODT_READ */
					0x00005088 /* EMC_FBIO_CFG5 */
					0xf00b0191 /* EMC_CFG_DIG_DLL */
					0x00008000 /* EMC_CFG_DIG_DLL_PERIOD */
					0x00000008 /* EMC_DLL_XFORM_DQS0 */
					0x00000008 /* EMC_DLL_XFORM_DQS1 */
					0x00000008 /* EMC_DLL_XFORM_DQS2 */
					0x00000008 /* EMC_DLL_XFORM_DQS3 */

Annotation

Implementation Notes