linux-kernel - Re: [PATCH v2 0/3] Samsung mfd/rtc driver alarm IRQ simplification

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Message-ID: <20251126112935.GA3070764@google.com>
Date: Wed, 26 Nov 2025 11:29:35 +0000
From: Lee Jones <lee@...nel.org>
To: André Draszik <andre.draszik@...aro.org>
Cc: Krzysztof Kozlowski <krzk@...nel.org>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Peter Griffin <peter.griffin@...aro.org>,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	Will McVicker <willmcvicker@...gle.com>,
	Juan Yescas <jyescas@...gle.com>,
	Douglas Anderson <dianders@...omium.org>, kernel-team@...roid.com,
	Kaustabh Chakraborty <kauschluss@...root.org>,
	linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-rtc@...r.kernel.org
Subject: Re: [PATCH v2 0/3] Samsung mfd/rtc driver alarm IRQ simplification

On Thu, 20 Nov 2025, André Draszik wrote:

> Hi,
> 
> With the attached patches the Samsung s5m RTC driver is simplified a
> little bit with regards to alarm IRQ acquisition.
> 
> The end result is that instead of having a list of IRQ numbers for each
> variant (and a BUILD_BUG_ON() to ensure consistency), the RTC driver
> queries the 'alarm' platform resource from the parent (mfd cell).
> 
> Additionally, we can drop a now-useless field from runtime data,
> reducing memory consumption slightly.
> 
> The attached patches must be applied in-order as patch 2 without 1 will
> fail at runtime, and patch 3 without 2 will fail at build time. I would
> expect them all to go via the MFD tree. Alternatively, they could be
> applied individually to the respective kernel trees during multiple
> kernel release cycles, but that seems a needless complication and
> delay.
> 
> Signed-off-by: André Draszik <andre.draszik@...aro.org>
> ---
> Changes in v2:
> - rebase on top of https://lore.kernel.org/r/20251114-s2mpg10-chained-irq-v1-1-34ddfa49c4cd@linaro.org
> - return struct regmap_irq_chip_data * in sec_irq_init() (Lee)
> - collect tags
> - Link to v1: https://lore.kernel.org/r/20251114-s5m-alarm-v1-0-c9b3bebae65f@linaro.org
> 
> ---
> André Draszik (3):
>       mfd: sec: add rtc alarm IRQ as platform device resource
>       rtc: s5m: query platform device IRQ resource for alarm IRQ
>       mfd: sec: drop now unused struct sec_pmic_dev::irq_data
> 
>  drivers/mfd/sec-common.c         | 45 ++++++++++++++++++++--------
>  drivers/mfd/sec-core.h           |  2 +-
>  drivers/mfd/sec-irq.c            | 63 ++++++++++++++++++----------------------
>  drivers/rtc/rtc-s5m.c            | 21 +++++---------
>  include/linux/mfd/samsung/core.h |  1 -
>  5 files changed, 71 insertions(+), 61 deletions(-)

The MFD parts look okay to me.

Once we have the RTC Ack, I'll merge this and send out a PR.

-- 
Lee Jones [李琼斯]