a9f5382861
Add more specific compatible strings to existing atmel,at24 compatible I2C EEPROMs where known. This is strictly for documentation purposes, no functional changes introduced. Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
127 lines
3.6 KiB
Text
127 lines
3.6 KiB
Text
/*
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* Copyright (c) 2021 Thomas Stranger
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <freq.h>
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#include <mem.h>
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/ {
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aliases {
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eeprom-0 = &eeprom0_x_nucleo_eeprma2;
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eeprom-1 = &eeprom4_x_nucleo_eeprma2;
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};
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};
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&arduino_i2c {
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status = "okay";
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clock-frequency = <I2C_BITRATE_FAST>;
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eeprom0_x_nucleo_eeprma2: eeprom@54 {
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/* M24C02-FMC6TG aka U1 (2 kbit eeprom in DFN8 package) */
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compatible = "st,m24c02", "st,m24xxx", "atmel,at24";
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reg = <0x54>;
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size = <256>;
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pagesize = <16>;
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address-width = <8>;
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timeout = <5>;
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/* if solder-bridge closed: arduino A1 pin on CN8 can wp */
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/* wp-gpios = <&arduino_header 1 GPIO_ACTIVE_LOW>; */
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};
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eeprom1_x_nucleo_eeprma2: eeprom@55 {
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/* M24256-DFDW6TP aka U2 (256 kbit eeprom in TSSOP package) */
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compatible = "st,m24256", "st,m24xxx", "atmel,at24";
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reg = <0x55>;
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size = <DT_SIZE_K(32)>;
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pagesize = <64>;
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address-width = <16>;
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timeout = <5>;
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/* if solder-bridge closed: arduino A1 pin on CN8 can wp */
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/* wp-gpios = <&arduino_header 1 GPIO_ACTIVE_LOW>; */
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};
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eeprom2_x_nucleo_eeprma2: eeprom@56 {
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/* M24M01-DFMN6TP aka U3 (1 Mbit eeprom in SO8N package) */
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compatible = "st,m24m01", "st,m24xxx", "atmel,at24";
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reg = <0x56>;
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size = <DT_SIZE_K(128)>;
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pagesize = <256>;
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address-width = <16>;
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timeout = <5>;
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/* if solder-bridge closed: arduino A1 pin on CN8 can wp */
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/* wp-gpios = <&arduino_header 1 GPIO_ACTIVE_LOW>; */
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};
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/* U4: unpopulated SO8N footprint for any I2C M24 EEPROM */
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};
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&arduino_spi {
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status = "okay";
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cs-gpios = <&arduino_header 8 GPIO_ACTIVE_LOW>, /* U5: eeprom4 */
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<&arduino_header 15 GPIO_ACTIVE_LOW>, /* U6: eeprom5 */
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<&arduino_header 16 GPIO_ACTIVE_LOW>; /* U7: eeprom6 */
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/*
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* All chip select pins have an on board 10k pull-up resistor to VCC,
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* and are connected to their respective arduino pins via a normally
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* closed solder bridge.
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*
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* All hold pins are connected to VCC with a 10k pull-up, and
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* have a connection to arduino pin A3 on CN8 via an open solder bridge.
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*
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* All write-protect pins are connected to J11 with a 10k pull-up
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* resistor. Where they can either be torn to VCC or GND.
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* Additionally they are connected to arduino pin A0 on CN8
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* via an open solder bridge.
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*/
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eeprom4_x_nucleo_eeprma2: eeprom_m95040@0 {
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/* M95040-RMC6TG aka U5 (4 kbit eeprom in DFN8 package) */
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compatible = "st,m95040", "st,m95xxx", "atmel,at25";
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reg = <0x00>;
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size = <512>;
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pagesize = <16>;
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address-width = <8>;
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spi-max-frequency = <DT_FREQ_M(20)>;
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timeout = <5>;
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/* if solder-bridge closed: arduino A0 pin on CN8 can wp */
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/* wp-gpios = <&arduino_header 0 GPIO_ACTIVE_LOW>; */
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};
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eeprom5_x_nucleo_eeprma2: eeprom_m95256@1 {
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/* M95256-DFDW6TP aka U6 (256 kbit eeprom in TSSOP package) */
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compatible = "st,m95256", "st,m95xxx", "atmel,at25";
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reg = <0x01>;
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size = <DT_SIZE_K(32)>;
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pagesize = <64>;
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address-width = <16>;
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spi-max-frequency = <DT_FREQ_M(20)>;
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timeout = <5>;
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/* if solder-bridge closed: arduino A0 pin on CN8 can wp */
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/* wp-gpios = <&arduino_header 0 GPIO_ACTIVE_LOW>; */
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};
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eeprom6_x_nucleo_eeprma2: eeprom_m95m04@2 {
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/* M95M04-DRMN6TP aka U7 (4 Mbit eeprom in SON8 package) */
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compatible = "st,m95m04", "st,m95xxx", "atmel,at25";
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reg = <0x02>;
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size = <DT_SIZE_K(512)>;
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pagesize = <512>;
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address-width = <24>;
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/* max-frequency 10MHz for vcc>=2.5V and 5MHz for vcc>=1.8V */
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spi-max-frequency = <DT_FREQ_M(10)>;
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timeout = <5>;
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/* if solder-bridge closed: arduino A0 pin on CN8 can wp */
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/* wp-gpios = <&arduino_header 0 GPIO_ACTIVE_LOW>; */
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};
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/* U8: unpopulated SO8N footprint for any M95 SPI EEPROM */
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};
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