spi_nor_set...de_en4b_ex4b(9)

💅 spi_nor_set_4byte_addr_mode_en4b_ex4b — Kernel API Manual ✨

okay so bestie, today we're looking at spi_nor_set_4byte_addr_mode_en4b_ex4b, and honestly? she's a little icon. this one enters/exits 4-byte address mode using SPINOR_OP_EN4B/SPINOR_OP_EX4B, and she's typically the one Winbond and Macronix reach for. iykyk 🎀

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✨ NAME ✨

spi_nor_set_4byte_addr_mode_en4b_ex4b — enter/exit 4-byte address mode using SPINOR_OP_EN4B/SPINOR_OP_EX4B. Typically used by Winbond and Macronix. periodt. 💖

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🌸 SYNOPSIS 🌸

int spi_nor_set_4byte_addr_mode_en4b_ex4b (struct spi_nor *nor , bool
enable );

like, that's the whole vibe. no cap. 🦋

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🎀 ARGUMENTS 🎀

• nor — pointer to struct spi_nor. your main character struct, fr fr. 👑
• enable — true to enter the 4-byte address mode, false to exit the 4-byte address mode. yes bestie, it's literally just a light switch: on = in, off = out. 💅

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💜 RETURN 💜

0 on success, -errno otherwise. so if you see a zero, she ate. if you see a negative errno… that's not giving success, and you should probably go look at what went wrong. 😭 🔥

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🌈 SEE ALSO 🌈

buckle up babes, this list is long — it's giving "the whole friend group showed up to the function." every single one, exactly as written:

• spi_nor_get_cmd_ext(9)
• spi_nor_spimem_setup_op(9)
• spi_nor_spimem_bounce(9)
• spi_nor_spimem_exec_op(9)
• spi_nor_spimem_read_data(9)
• spi_nor_read_data(9)
• spi_nor_spimem_write_data(9)
• spi_nor_write_data(9)
• spi_nor_read_any_reg(9)
• spi_nor_write_any_volatile_reg(9)
• spi_nor_write_enable(9)
• spi_nor_write_disable(9)
• spi_nor_read_id(9)
• spi_nor_read_sr(9)
• spi_nor_read_cr(9)
• spi_nor_set_4byte_addr_mode_wren_en4b_ex4b(9)
• spi_nor_set_4byte_addr_mode_brwr(9)
• spi_nor_sr_ready(9)
• spi_nor_use_parallel_locking(9)
• spi_nor_ready(9)
• spi_nor_wait_till_ready_with_timeout(9)
• spi_nor_wait_till_ready(9)
• spi_nor_global_block_unlock(9)
• spi_nor_write_sr(9)
• spi_nor_write_sr1_and_check(9)
• spi_nor_write_16bit_sr_and_check(9)
• spi_nor_write_16bit_cr_and_check(9)
• spi_nor_write_16bit_sr_cr_and_check(9)
• spi_nor_write_sr_and_check(9)
• spi_nor_write_sr_cr_and_check(9)
• spi_nor_write_sr2(9)
• spi_nor_read_sr2(9)
• spi_nor_erase_die(9)
• spi_nor_div_by_erase_size(9)
• spi_nor_find_best_erase_type(9)
• spi_nor_init_erase_cmd(9)
• spi_nor_destroy_erase_cmd_list(9)
• spi_nor_init_erase_cmd_list(9)
• spi_nor_erase_multi_sectors(9)
• spi_nor_sr1_bit6_quad_enable(9)
• spi_nor_sr2_bit1_quad_enable(9)
• spi_nor_sr2_bit7_quad_enable(9)
• spi_nor_spimem_check_read_pp_op(9)
• spi_nor_spimem_check_readop(9)
• spi_nor_spimem_check_pp(9)
• spi_nor_spimem_adjust_hwcaps(9)
• spi_nor_set_erase_type(9)
• spi_nor_mask_erase_type(9)
• spi_nor_init_uniform_erase_map(9)
• spi_nor_select_uniform_erase(9)
• spi_nor_manufacturer_init_params(9)
• spi_nor_no_sfdp_init_params(9)
• spi_nor_init_flags(9)
• spi_nor_init_fixup_flags(9)
• spi_nor_late_init_params(9)
• spi_nor_sfdp_init_params_deprecated(9)
• spi_nor_init_params_deprecated(9)
• spi_nor_init_default_params(9)
• spi_nor_init_params(9)
• spi_nor_quad_enable(9)
• spi_nor_set_4byte_addr_mode(9)
• spi_nor_soft_reset(9)

and yes, the kernel file to go peek at is ./drivers/mtd/spi-nor/core.c — that's where the magic lives, bestie. 🔥

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ngl this page is short but she's mighty. true in, false out, 0 means slay, -errno means go debug. 🧚‍♀️

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okay that's the whole page!! sourced straight from ./drivers/mtd/spi-nor, dated October 2026, and this manual page goes by spi_nor_set...de_en4b_ex4b(9). love that for us. mwah 💖 🎀 🌸 🫶