linux-kernel - [PATCH v4 0/4] samsung: pinctrl: Add support for eint_fltcon

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Message-Id: <20250307-pinctrl-fltcon-suspend-v4-0-2d775e486036@linaro.org>
Date: Fri, 07 Mar 2025 10:29:04 +0000
From: Peter Griffin <peter.griffin@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
 Sylwester Nawrocki <s.nawrocki@...sung.com>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Linus Walleij <linus.walleij@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 andre.draszik@...aro.org, tudor.ambarus@...aro.org, willmcvicker@...gle.com, 
 semen.protsenko@...aro.org, kernel-team@...roid.com, 
 jaewon02.kim@...sung.com, Peter Griffin <peter.griffin@...aro.org>, 
 stable@...r.kernel.org
Subject: [PATCH v4 0/4] samsung: pinctrl: Add support for
 eint_fltcon_offset and filter selection on gs101

Hi folks,

This series fixes support for correctly saving and restoring fltcon0
and fltcon1 registers on gs101 for non-alive banks where the fltcon
register offset is not at a fixed offset (unlike previous SoCs).
This is done by adding a eint_fltcon_offset and providing GS101
specific pin macros that take an additional parameter (similar to
how exynosautov920 handles it's eint_con_offset).

Additionally the SoC specific suspend and resume callbacks are
re-factored so that each SoC variant has it's own callback containing
the peculiarities for that SoC.

Finally support for filter selection on alive banks is added, this is
currently only enabled for gs101. The code path can be excercised using
`echo mem > /sys/power/state`

regards,

Peter

To: Krzysztof Kozlowski <krzk@...nel.org>
To: Sylwester Nawrocki <s.nawrocki@...sung.com>
To: Alim Akhtar <alim.akhtar@...sung.com>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-samsung-soc@...r.kernel.org
Cc: linux-gpio@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: andre.draszik@...aro.org
Cc: tudor.ambarus@...aro.org
Cc: willmcvicker@...gle.com
Cc: semen.protsenko@...aro.org
Cc: kernel-team@...roid.com
Cc: jaewon02.kim@...sung.com

Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
---
Changes in v4:
- save->eint_fltcon1 is an argument to pr_debug(), not readl() change alignment accordingly (Andre)
- Link to v3: https://lore.kernel.org/r/20250306-pinctrl-fltcon-suspend-v3-0-f9ab4ff6a24e@linaro.org

Changes in v3:
- Ensure EXYNOS_FLTCON_DIGITAL bit is cleared (Andre)
- Make it obvious that exynos_eint_set_filter() is conditional on bank type (Andre)
- Make it obvious exynos_set_wakeup() is conditional on bank type (Andre)
- Align style where the '+' is placed first (Andre)
- Remove unnecessary braces (Andre)
- Link to v2: https://lore.kernel.org/r/20250301-pinctrl-fltcon-suspend-v2-0-a7eef9bb443b@linaro.org

Changes in v2:
- Remove eint_flt_selectable bool as it can be deduced from EINT_TYPE_WKUP (Peter)
- Move filter config register comment to header file (Andre)
- Rename EXYNOS_FLTCON_DELAY to EXYNOS_FLTCON_ANALOG (Andre)
- Remove misleading old comment (Andre)
- Refactor exynos_eint_update_flt_reg() into a loop (Andre)
- Split refactor of suspend/resume callbacks & gs101 parts into separate patches (Andre)
- Link to v1: https://lore.kernel.org/r/20250120-pinctrl-fltcon-suspend-v1-0-e77900b2a854@linaro.org

---
Peter Griffin (4):
      pinctrl: samsung: add support for eint_fltcon_offset
      pinctrl: samsung: add dedicated SoC eint suspend/resume callbacks
      pinctrl: samsung: add gs101 specific eint suspend/resume callbacks
      pinctrl: samsung: Add filter selection support for alive bank on gs101

 drivers/pinctrl/samsung/pinctrl-exynos-arm64.c | 150 ++++++-------
 drivers/pinctrl/samsung/pinctrl-exynos.c       | 294 +++++++++++++++----------
 drivers/pinctrl/samsung/pinctrl-exynos.h       |  50 ++++-
 drivers/pinctrl/samsung/pinctrl-samsung.c      |  12 +-
 drivers/pinctrl/samsung/pinctrl-samsung.h      |  12 +-
 5 files changed, 318 insertions(+), 200 deletions(-)
---
base-commit: 0761652a3b3b607787aebc386d412b1d0ae8008c
change-id: 20250120-pinctrl-fltcon-suspend-2333a137c4d4

Best regards,
-- 
Peter Griffin <peter.griffin@...aro.org>