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Subject[PATCH v2 2/4] dt-bindings: memory: Add binding for NVIDIA Tegra30 External Memory Controller
Date
Add device-tree binding for NVIDIA Tegra30 External Memory Controller.
The binding is based on the Tegra124 EMC binding since hardware is
similar, although there are couple significant differences.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
.../memory-controllers/nvidia,tegra30-emc.txt | 257 ++++++++++++++++++
1 file changed, 257 insertions(+)
create mode 100644 Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-emc.txt

diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-emc.txt b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-emc.txt
new file mode 100644
index 000000000000..dffe396c5d79
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-emc.txt
@@ -0,0 +1,257 @@
+NVIDIA Tegra30 SoC EMC (external memory controller)
+====================================================
+
+Required properties :
+- compatible : Should be "nvidia,tegra30-emc".
+- reg : physical base address and length of the controller's registers.
+- #address-cells : Should be 1
+- #size-cells : Should be 0
+- interrupts : Should contain EMC General interrupt.
+- clocks : Should contain EMC clock.
+- nvidia,memory-controller : phandle of the MC driver.
+
+The node should contain a "emc-timings" subnode for each supported RAM type
+(see field RAM_CODE in register PMC_STRAPPING_OPT_A), with its unit address
+being its RAM_CODE.
+
+Required properties for "emc-timings" nodes :
+- nvidia,ram-code : Should contain the value of RAM_CODE this timing set is
+used for.
+
+Each "emc-timings" node should contain a "timing" subnode for every supported
+EMC clock rate. The "timing" subnodes should have the clock rate in Hz as
+their unit address.
+
+Required properties for "timing" nodes :
+- clock-frequency : Should contain the memory clock rate in Hz.
+- The following properties contain EMC timing characterization values
+(specified in the board documentation) :
+ - nvidia,emc-auto-cal-interval : EMC_AUTO_CAL_INTERVAL
+ - nvidia,emc-mode-1 : Mode Register 1
+ - nvidia,emc-mode-2 : Mode Register 2
+ - nvidia,emc-mode-reset : Mode Register 0
+ - nvidia,emc-zcal-cnt-long : EMC_ZCAL_WAIT_CNT after clock change
+ - nvidia,emc-cfg-dyn-self-ref : dynamic self-refresh enabled
+ - nvidia,emc-cfg-periodic-qrst : FBIO "read" FIFO periodic resetting enabled
+- nvidia,emc-configuration : EMC timing characterization data. These are the
+registers (see section "18.13.2 EMC Registers" in the TRM) whose values need to
+be specified, according to the board documentation:
+
+ EMC_RC
+ EMC_RFC
+ EMC_RAS
+ EMC_RP
+ EMC_R2W
+ EMC_W2R
+ EMC_R2P
+ EMC_W2P
+ EMC_RD_RCD
+ EMC_WR_RCD
+ EMC_RRD
+ EMC_REXT
+ EMC_WEXT
+ EMC_WDV
+ EMC_QUSE
+ EMC_QRST
+ EMC_QSAFE
+ EMC_RDV
+ EMC_REFRESH
+ EMC_BURST_REFRESH_NUM
+ EMC_PRE_REFRESH_REQ_CNT
+ EMC_PDEX2WR
+ EMC_PDEX2RD
+ EMC_PCHG2PDEN
+ EMC_ACT2PDEN
+ EMC_AR2PDEN
+ EMC_RW2PDEN
+ EMC_TXSR
+ EMC_TXSRDLL
+ EMC_TCKE
+ EMC_TFAW
+ EMC_TRPAB
+ EMC_TCLKSTABLE
+ EMC_TCLKSTOP
+ EMC_TREFBW
+ EMC_QUSE_EXTRA
+ EMC_FBIO_CFG6
+ EMC_ODT_WRITE
+ EMC_ODT_READ
+ EMC_FBIO_CFG5
+ EMC_CFG_DIG_DLL
+ EMC_CFG_DIG_DLL_PERIOD
+ EMC_DLL_XFORM_DQS0
+ EMC_DLL_XFORM_DQS1
+ EMC_DLL_XFORM_DQS2
+ EMC_DLL_XFORM_DQS3
+ EMC_DLL_XFORM_DQS4
+ EMC_DLL_XFORM_DQS5
+ EMC_DLL_XFORM_DQS6
+ EMC_DLL_XFORM_DQS7
+ EMC_DLL_XFORM_QUSE0
+ EMC_DLL_XFORM_QUSE1
+ EMC_DLL_XFORM_QUSE2
+ EMC_DLL_XFORM_QUSE3
+ EMC_DLL_XFORM_QUSE4
+ EMC_DLL_XFORM_QUSE5
+ EMC_DLL_XFORM_QUSE6
+ EMC_DLL_XFORM_QUSE7
+ EMC_DLI_TRIM_TXDQS0
+ EMC_DLI_TRIM_TXDQS1
+ EMC_DLI_TRIM_TXDQS2
+ EMC_DLI_TRIM_TXDQS3
+ EMC_DLI_TRIM_TXDQS4
+ EMC_DLI_TRIM_TXDQS5
+ EMC_DLI_TRIM_TXDQS6
+ EMC_DLI_TRIM_TXDQS7
+ EMC_DLL_XFORM_DQ0
+ EMC_DLL_XFORM_DQ1
+ EMC_DLL_XFORM_DQ2
+ EMC_DLL_XFORM_DQ3
+ EMC_XM2CMDPADCTRL
+ EMC_XM2DQSPADCTRL2
+ EMC_XM2DQPADCTRL2
+ EMC_XM2CLKPADCTRL
+ EMC_XM2COMPPADCTRL
+ EMC_XM2VTTGENPADCTRL
+ EMC_XM2VTTGENPADCTRL2
+ EMC_XM2QUSEPADCTRL
+ EMC_XM2DQSPADCTRL3
+ EMC_CTT_TERM_CTRL
+ EMC_ZCAL_INTERVAL
+ EMC_ZCAL_WAIT_CNT
+ EMC_MRS_WAIT_CNT
+ EMC_AUTO_CAL_CONFIG
+ EMC_CTT
+ EMC_CTT_DURATION
+ EMC_DYN_SELF_REF_CONTROL
+ EMC_FBIO_SPARE
+ EMC_CFG_RSV
+
+Example SoC include file:
+
+/ {
+ emc@7000f400 {
+ compatible = "nvidia,tegra30-emc";
+ reg = <0x7000f400 0x400>;
+ interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&tegra_car TEGRA30_CLK_EMC>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ nvidia,memory-controller = <&mc>;
+ };
+};
+
+Example board file:
+
+/ {
+ emc@7000f400 {
+ emc-timings-1 {
+ nvidia,ram-code = <1>;
+
+ 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-dyn-self-ref = <0x00000000>;
+ nvidia,emc-cfg-periodic-qrst = <0x00000001>;
+
+ nvidia,emc-configuration = <
+ 0x00000020 /* EMC_RC */
+ 0x0000006a /* 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 */
+ 0x0000000a /* 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 */
+ 0x0000000b /* EMC_QUSE_EXTRA */
+ 0x00000006 /* 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 */
+ 0x0000000a /* EMC_DLL_XFORM_DQS4 */
+ 0x0000000a /* EMC_DLL_XFORM_DQS5 */
+ 0x0000000a /* EMC_DLL_XFORM_DQS6 */
+ 0x0000000a /* EMC_DLL_XFORM_DQS7 */
+ 0x00018000 /* EMC_DLL_XFORM_QUSE0 */
+ 0x00018000 /* EMC_DLL_XFORM_QUSE1 */
+ 0x00018000 /* EMC_DLL_XFORM_QUSE2 */
+ 0x00018000 /* EMC_DLL_XFORM_QUSE3 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE4 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE5 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE6 */
+ 0x00000000 /* EMC_DLL_XFORM_QUSE7 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS0 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS1 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS2 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS3 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS4 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS5 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS6 */
+ 0x00000000 /* EMC_DLI_TRIM_TXDQS7 */
+ 0x0000000a /* EMC_DLL_XFORM_DQ0 */
+ 0x0000000a /* EMC_DLL_XFORM_DQ1 */
+ 0x0000000a /* EMC_DLL_XFORM_DQ2 */
+ 0x0000000a /* EMC_DLL_XFORM_DQ3 */
+ 0x000002a0 /* EMC_XM2CMDPADCTRL */
+ 0x0800013d /* EMC_XM2DQSPADCTRL2 */
+ 0x22220000 /* EMC_XM2DQPADCTRL2 */
+ 0x77fff884 /* EMC_XM2CLKPADCTRL */
+ 0x01f1f501 /* EMC_XM2COMPPADCTRL */
+ 0x07077404 /* EMC_XM2VTTGENPADCTRL */
+ 0x54000000 /* EMC_XM2VTTGENPADCTRL2 */
+ 0x080001e8 /* EMC_XM2QUSEPADCTRL */
+ 0x0c000021 /* EMC_XM2DQSPADCTRL3 */
+ 0x00000802 /* EMC_CTT_TERM_CTRL */
+ 0x00020000 /* EMC_ZCAL_INTERVAL */
+ 0x00000100 /* EMC_ZCAL_WAIT_CNT */
+ 0x0155000c /* EMC_MRS_WAIT_CNT */
+ 0xa0f10000 /* EMC_AUTO_CAL_CONFIG */
+ 0x00000000 /* EMC_CTT */
+ 0x00000000 /* EMC_CTT_DURATION */
+ 0x800028a5 /* EMC_DYN_SELF_REF_CONTROL */
+ 0xe8000000 /* EMC_FBIO_SPARE */
+ 0xff00ff49 /* EMC_CFG_RSV */
+ >;
+ };
+ };
+ };
+};
--
2.21.0
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