Thread (20 messages) 20 messages, 6 authors, 2026-01-06

Re: [PATCH v3 0/4] fbdev: Make CONFIG_FB_DEVICE optional for drivers

From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: 2025-12-30 10:42:46
Also in: linux-fbdev, linux-omap, linux-staging, lkml

Hi Chintan.

On Tue, 30 Dec 2025 at 06:29, Chintan Patel [off-list ref] wrote:
This series makes CONFIG_FB_DEVICE optional for fbdev drivers that use
it only for sysfs interfaces, addressing Thomas Zimmermann’s TODO to
remove hard FB_DEVICE dependencies.

The series introduces a small helper, dev_of_fbinfo(), which returns
NULL when CONFIG_FB_DEVICE=n. This allows sysfs code paths to be skipped
via runtime checks, avoids #ifdef CONFIG_FB_DEVICE clutter, and keeps
full compile-time syntax checking.

Signed-off-by: Chintan Patel <redacted>
---
Changes in v3:
- Use PTR_IF() to conditionally include overlay_sysfs_group in
  overlay_sysfs_groups
- Decouple variable definition and assignment in fbtft_sysfs_init/exit

Changes in v2:
- Add dev_of_fbinfo() helper (suggested by Geert Uytterhoeven)
by Helge Deller, not me.
- Replace #ifdef CONFIG_FB_DEVICE blocks with runtime NULL checks
- Switch to fb_dbg() / fb_info() logging (suggested by Thomas Zimmermann)
Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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