v4l2_i2c_subdev_set_name(9)

💅 v4l2_i2c_subdev_set_name(9) 💅

okay so this is a page straight out of the Kernel API Manual, and today's main character is v4l2_i2c_subdev_set_name — yes bestie, we're naming I²C sub-devices today and honestly? iconic. 🎀

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✨ NAME ✨

v4l2_i2c_subdev_set_name — literally just Set name for an I²C sub-device. that's the whole vibe. 🦋

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🌸 SYNOPSIS 🌸

void v4l2_i2c_subdev_set_name (struct v4l2_subdev *sd , struct
i2c_client *client , const char *devname , const char *postfix );

it returns void, so like… no return value to obsess over. it just does the thing and leaves. main character energy fr fr. 💅

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🫶 ARGUMENTS 🫶

• sd — pointer to struct v4l2_subdev. your sub-device bestie that's getting named 💖
• client — pointer to struct i2c_client. the I²C client in question 🌈
• devname — the name of the device; if NULL, the I²C device drivers's name will be used. so like, pass nothing and it'll borrow a name, no cap 🔥
• postfix — sub-device specific string to put right after the I²C device name; may be NULL. yes babe, optional, she's flexible ✨

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👑 SEE ALSO 👑

the kernel file is ./include/media/v4l2-common.h and honestly the whole friend group shows up here, so let me introduce everyone:

• v4l2_ctrl_query_fill(9)
• enum v4l2_i2c_tuner_type(9)
• v4l2_i2c_new_subdev(9)
• v4l2_i2c_new_subdev_board(9)
• v4l2_i2c_subdev_init(9)
• v4l2_i2c_subdev_addr(9)
• v4l2_i2c_tuner_addrs(9)
• v4l2_i2c_subdev_unregister(9)
• v4l2_spi_new_subdev(9)
• v4l2_spi_subdev_init(9)
• v4l2_spi_subdev_unregister(9)
• v4l_bound_align_image(9)
• v4l2_find_nearest_size_conditional(9)
• v4l2_find_nearest_size(9)
• v4l2_g_parm_cap(9)
• v4l2_s_parm_cap(9)
• enum v4l2_pixel_encoding(9)
• struct v4l2_format_info(9)
• v4l2_get_link_freq(9)
• v4l2_get_active_data_lanes(9)
• v4l2_link_freq_to_bitmap(9)
• devm_v4l2_sensor_clk_get(9)
• devm_v4l2_sensor_clk_get_legacy(9)

like… that's the whole squad 🫶 go read them, iykyk 💜

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ok that's the tea, bestie — every flag, pointer and NULL default stays exactly as the kernel gods wrote it, no invented lore, periodt 💀

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sign-off szn 🎀 — this little beauty lives under ./include/media, dated October 2026, and it's filed in the manual as v4l2_i2c_subdev_set_name(9). slay, go name some sub-devices 💖✨