// SPDX-License-Identifier: GPL-2.0-only /* * NXP LPC18xx/LPC43xx EEPROM memory NVMEM driver * * Copyright (c) 2015 Ariel D'Alessandro <[email protected]> */ #include <linux/clk.h> #include <linux/device.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/io.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/nvmem-provider.h> #include <linux/platform_device.h> #include <linux/reset.h> /* Registers */ #define LPC18XX_EEPROM_AUTOPROG … #define LPC18XX_EEPROM_AUTOPROG_WORD … #define LPC18XX_EEPROM_CLKDIV … #define LPC18XX_EEPROM_PWRDWN … #define LPC18XX_EEPROM_PWRDWN_NO … #define LPC18XX_EEPROM_PWRDWN_YES … #define LPC18XX_EEPROM_INTSTAT … #define LPC18XX_EEPROM_INTSTAT_END_OF_PROG … #define LPC18XX_EEPROM_INTSTATCLR … #define LPC18XX_EEPROM_INTSTATCLR_PROG_CLR_ST … /* Fixed page size (bytes) */ #define LPC18XX_EEPROM_PAGE_SIZE … /* EEPROM device requires a ~1500 kHz clock (min 800 kHz, max 1600 kHz) */ #define LPC18XX_EEPROM_CLOCK_HZ … /* EEPROM requires 3 ms of erase/program time between each writing */ #define LPC18XX_EEPROM_PROGRAM_TIME … struct lpc18xx_eeprom_dev { … }; static inline void lpc18xx_eeprom_writel(struct lpc18xx_eeprom_dev *eeprom, u32 reg, u32 val) { … } static inline u32 lpc18xx_eeprom_readl(struct lpc18xx_eeprom_dev *eeprom, u32 reg) { … } static int lpc18xx_eeprom_busywait_until_prog(struct lpc18xx_eeprom_dev *eeprom) { … } static int lpc18xx_eeprom_gather_write(void *context, unsigned int reg, void *val, size_t bytes) { … } static int lpc18xx_eeprom_read(void *context, unsigned int offset, void *val, size_t bytes) { … } static struct nvmem_config lpc18xx_nvmem_config = …; static int lpc18xx_eeprom_probe(struct platform_device *pdev) { … } static void lpc18xx_eeprom_remove(struct platform_device *pdev) { … } static const struct of_device_id lpc18xx_eeprom_of_match[] = …; MODULE_DEVICE_TABLE(of, lpc18xx_eeprom_of_match); static struct platform_driver lpc18xx_eeprom_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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