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Searched +full:trl +full:- +full:min +full:- +full:tck (Results 1 – 7 of 7) sorted by relevance

/openbmc/linux/Documentation/devicetree/bindings/memory-controllers/ddr/
H A Djedec,lpddr3.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr3.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: LPDDR3 SDRAM compliant to JEDEC JESD209-3
10 - Krzysztof Kozlowski <krzk@kernel.org>
13 - $ref: jedec,lpddr-props.yaml#
18 - items:
19 - enum:
20 - samsung,K3QF2F20DB
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/openbmc/linux/drivers/memory/
H A Dof_memory.c1 // SPDX-License-Identifier: GPL-2.0-or-later
19 * of_get_min_tck() - extract min timing values for ddr
21 * @dev: device requesting for min timing values
26 * default min timings provided by JEDEC.
32 struct lpddr2_min_tck *min; in of_get_min_tck() local
34 min = devm_kzalloc(dev, sizeof(*min), GFP_KERNEL); in of_get_min_tck()
35 if (!min) in of_get_min_tck()
38 ret |= of_property_read_u32(np, "tRPab-min-tck", &min->tRPab); in of_get_min_tck()
39 ret |= of_property_read_u32(np, "tRCD-min-tck", &min->tRCD); in of_get_min_tck()
40 ret |= of_property_read_u32(np, "tWR-min-tck", &min->tWR); in of_get_min_tck()
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H A Djedec_ddr.h1 /* SPDX-License-Identifier: GPL-2.0-only */
64 /* Refresh rate in nano-seconds */
169 * Min value for some parameters in terms of number of tCK cycles(nCK)
207 * -ENOENT if info unavailable.
242 u32 tRL; member
252 * Min value for some parameters in terms of number of tCK cycles(nCK)
271 u32 tRL; member
/openbmc/u-boot/arch/arm/mach-omap2/omap5/
H A Demif.c1 // SPDX-License-Identifier: GPL-2.0+
17 #define print_timing_reg(reg) debug(#reg" - 0x%08x\n", (reg))
23 /* Base AC Timing values specified by JESD209-2 for 532MHz operation */
48 * Min tCK values specified by JESD209-2
49 * Min tCK specifies the minimum duration of some AC timing parameters in terms
51 * absolute time value is less than the min tCK value, min tCK value should
55 .tRL = 3,
/openbmc/u-boot/arch/arm/mach-omap2/omap4/
H A Demif.c1 // SPDX-License-Identifier: GPL-2.0+
22 /* Base AC Timing values specified by JESD209-2 for 400MHz operation */
46 /* Base AC Timing values specified by JESD209-2 for 200 MHz operation */
71 * Min tCK values specified by JESD209-2
72 * Min tCK specifies the minimum duration of some AC timing parameters in terms
74 * absolute time value is less than the min tCK value, min tCK value should
78 .tRL = 3,
/openbmc/linux/arch/arm/boot/dts/samsung/
H A Dexynos5422-odroid-core.dtsi1 // SPDX-License-Identifier: GPL-2.0
3 * Hardkernel Odroid XU3/XU3-Lite/XU4/HC1 boards core device tree source
6 * Copyright (c) 2013-2017 Samsung Electronics Co., Ltd.
10 #include <dt-bindings/clock/samsung,s2mps11.h>
11 #include <dt-bindings/interrupt-controller/irq.h>
12 #include <dt-bindings/gpio/gpio.h>
14 #include "exynos5422-cpus.dtsi"
27 stdout-path = "serial2:115200n8";
31 compatible = "samsung,secure-firmware";
35 fixed-rate-clocks {
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/openbmc/u-boot/arch/arm/include/asm/
H A Demif.h4 * Copyright (C) 2009-2010 Texas Instruments, Inc.
815 * calculations. So, as a trade-off keep denominator(and consequently
816 * numerator) within a limit sacrificing some accuracy - but not much
885 /* Interleaving policies at EMIF level- between banks and Chip Selects */
909 /* To be used when voltage is changed for DPS/DVFS - 1us */
913 * 50us - or maximum value will do
921 * due to smart-reflex.
934 /* Enable ZQ Calibration on exiting Self-refresh */
937 * ZQ Calibration simultaneously on both chip-selects:
1005 * nWR : 3(default). EMIF does not do pre-charge.
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