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drivers: memc: Fix copyright and add example DTS config

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Example DTS config comment is meant to help users of the
driver, with the PSRAM device tree configuration.

Signed-off-by: Nikhil Namjoshi <nikhilnamjoshi@google.com>
This commit is contained in:
Nikhil Namjoshi
2025-12-17 20:26:37 +00:00
committed by Benjamin Cabé
parent 1a31990457
commit c8f8fab1ed
1 changed files with 56 additions and 1 deletions
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57
drivers/memc/memc_mcux_flexspi_is66wvs8m8.c
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@@ -1,5 +1,5 @@
/*
* Copyright 2023 NXP
* Copyright 2025 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -14,6 +14,61 @@
LOG_MODULE_REGISTER(memc_flexspi_is66wvs8m8, CONFIG_MEMC_LOG_LEVEL);
/*
* Example PSRAM and FlexSPI Controller DTS setting.
*
/ {
// Add External PSRAM to the Linker Map.
psram0: psram_region@90800000 {
compatible = "zephyr,memory-region", "mmio-sram";
zephyr,memory-region = "EXT_PSRAM";
device_type = "memory";
reg = <0x90800000 0x800000>;
};
};
&flexspi {
status = "okay";
pinctrl-0 = <&pinmux_flexspi>;
pinctrl-names = "default";
rx-clock-source = <1>;
/delete-property/ combination-mode;
/delete-property/ ahb-cacheable;
/delete-property/ ahb-bufferable;
/delete-property/ ahb-prefetch;
/delete-property/ ahb-read-addr-opt;
// Account for both the memories (w25q64jvssiq & is66wvs8m8)
// on the FlexSPI controller.
reg = <0x500c8000 0x1000>,
<0x90000000 DT_SIZE_M(16)>;
w25q64jvssiq: w25q64jvssiq@0 {
........
}
is66wvs8m8: is66wvs8m8@2 {
compatible = "nxp,imx-flexspi-is66wvs8m8";
// IS66WVS8M8 is 8MB, 64MBit SerialRAM
size = <DT_SIZE_M(64)>;
reg = <2>;
spi-max-frequency = <100000000>;
// PSRAM cannot be enabled while board is in default XIP
// configuration, as it will conflict with flash chip.
//
status = "okay";
cs-interval-unit = <1>;
cs-interval = <3>;
cs-hold-time = <3>;
cs-setup-time = <3>;
data-valid-time = <1>;
column-space = <0>;
ahb-write-wait-unit = <2>;
ahb-write-wait-interval = <1>;
};
};
*/
/* Vendor ID for ISSI device */
#define ISSI_VENDOR_ID 0x9D