Re: [U-Boot] [PATCH] nand_base: Add timeout for NAND reset command

Peter Tyser wrote:

+/*

• • CONFIG_SYS_NAND_RESET_CNT is used as a timeout mechanism when resetting
• • a flash. NAND flash is initialized prior to interrupts so standard timers
• • can't be used. CONFIG_SYS_NAND_RESET_CNT should be set to a value
• • which is greater than (max NAND reset time / NAND status read time).
• • A conservative default of 200000 (500 us / 25 ns) is used as a default.
• */

+#ifndef CONFIG_SYS_NAND_RESET_CNT +#define CONFIG_SYS_NAND_RESET_CNT 200000 +#endif

Where does 25 ns come from? Should the timeout be in terms of real time rather than iterations (we use get_ticks() for this purpose in fsl_elbc_nand.c)?

-Scott