linux-kernel - [PATCH v2 00/15] gpio: replace legacy bgpio_init() with its modernized alternative

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Message-Id: <20250910-gpio-mmio-gpio-conv-part4-v2-0-f3d1a4c57124@linaro.org>
Date: Wed, 10 Sep 2025 09:12:36 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Keguang Zhang <keguang.zhang@...il.com>, Alban Bedel <albeu@...e.fr>, 
 Doug Berger <opendmb@...il.com>, 
 Florian Fainelli <florian.fainelli@...adcom.com>, 
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Samuel Holland <samuel.holland@...ive.com>, Yixun Lan <dlan@...too.org>, 
 Andy Shevchenko <andy@...nel.org>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-mips@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH v2 00/15] gpio: replace legacy bgpio_init() with its
 modernized alternative - part 4

Here's the final part of the generic GPIO chip conversions. Once all the
existing users are switched to the new API, the final patch in the
series removes bgpio_init(), moves the gpio-mmio fields out of struct
gpio_chip and into struct gpio_generic_chip and adjusts gpio-mmio.c to
the new situation.

Down the line we could probably improve gpio-mmio.c by using lock guards
and replacing the - now obsolete - "bgpio" prefix with "gpio_generic" or
something similar but this series is already big as is so I'm leaving
that for the future.

Tested in qemu on vexpress-a9.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
Changes in v2:
- Use a more common syntax for compound literals
- Link to v1: https://lore.kernel.org/r/20250909-gpio-mmio-gpio-conv-part4-v1-0-9f723dc3524a@linaro.org

---
Bartosz Golaszewski (15):
      gpio: loongson1: allow building the module with COMPILE_TEST enabled
      gpio: loongson1: use new generic GPIO chip API
      gpio: hlwd: use new generic GPIO chip API
      gpio: ath79: use new generic GPIO chip API
      gpio: ath79: use the generic GPIO chip lock for IRQ handling
      gpio: xgene-sb: use generic GPIO chip register read and write APIs
      gpio: brcmstb: use new generic GPIO chip API
      gpio: mt7621: use new generic GPIO chip API
      gpio: mt7621: use the generic GPIO chip lock for IRQ handling
      gpio: menz127: use new generic GPIO chip API
      gpio: sifive: use new generic GPIO chip API
      gpio: spacemit-k1: use new generic GPIO chip API
      gpio: sodaville: use new generic GPIO chip API
      gpio: mmio: use new generic GPIO chip API
      gpio: move gpio-mmio-specific fields out of struct gpio_chip

 drivers/gpio/Kconfig            |   2 +-
 drivers/gpio/TODO               |   5 -
 drivers/gpio/gpio-ath79.c       |  88 +++++-----
 drivers/gpio/gpio-brcmstb.c     | 112 +++++++------
 drivers/gpio/gpio-hlwd.c        | 105 ++++++------
 drivers/gpio/gpio-loongson1.c   |  40 +++--
 drivers/gpio/gpio-menz127.c     |  31 ++--
 drivers/gpio/gpio-mlxbf2.c      |   2 +-
 drivers/gpio/gpio-mmio.c        | 350 +++++++++++++++++++++-------------------
 drivers/gpio/gpio-mpc8xxx.c     |   5 +-
 drivers/gpio/gpio-mt7621.c      |  80 ++++-----
 drivers/gpio/gpio-sifive.c      |  73 +++++----
 drivers/gpio/gpio-sodaville.c   |  20 ++-
 drivers/gpio/gpio-spacemit-k1.c |  28 +++-
 drivers/gpio/gpio-xgene-sb.c    |   5 +-
 include/linux/gpio/driver.h     |  44 -----
 include/linux/gpio/generic.h    |  67 +++++---
 17 files changed, 548 insertions(+), 509 deletions(-)
---
base-commit: 65dd046ef55861190ecde44c6d9fcde54b9fb77d
change-id: 20250904-gpio-mmio-gpio-conv-part4-5e1f772ba724

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>