From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Prabhakar <prabhakar.csengg@gmail.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
linux-rtc@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Prabhakar <prabhakar.csengg+renesas@gmail.com>,
Biju Das <biju.das.jz@bp.renesas.com>,
Fabrizio Castro <fabrizio.castro.jz@renesas.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: Re: [PATCH v3 08/12] rtc: rzn1: Dynamically calculate synchronization delay based on clock rate
Date: Tue, 18 Aug 2026 12:49:00 +0200 [thread overview]
Message-ID: <aoQ4nMR-NeV3FFz9@ninjato> (raw)
In-Reply-To: <20260706175138.12587-9-prabhakar.mahadev-lad.rj@bp.renesas.com>
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> - /* Wait for the counter to stop: two 32k clock cycles */
> - usleep_range(61, 100);
> + /* Wait for the counter to stop: two RTC_PCLK clock cycles */
> + usleep_range(rtc->sync_time, rtc->sync_time + 100);
Hmm, 100 seems more arbitrary here than in the original code? Maybe 2 *
sync_time like below?
> @@ -444,12 +445,20 @@ static int rzn1_rtc_probe(struct platform_device *pdev)
> scmp_val = RZN1_RTC_CTL0_SLSB_SCMP;
> }
>
> + /*
> + * The internal clock counter operates in synchronization with the
> + * RTC_PCLK clock. Calculate the duration of two RTC_PCLK clock
> + * cycles in microseconds required for operations to complete.
> + */
Too wordy, this is enough IMHO:
/* Calculate the duration of two RTC_PCLK clock cycles */
Rest looks good.
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next prev parent reply other threads:[~2026-08-18 10:49 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-06 17:51 [PATCH v3 00/12] Add RTC support for Renesas RZ/T2H and RZ/N2H SoCs Prabhakar
2026-07-06 17:51 ` [PATCH v3 01/12] dt-bindings: rtc: renesas,rzn1-rtc: Add RZ/T2H and RZ/N2H support Prabhakar
2026-07-06 17:58 ` sashiko-bot
2026-08-18 7:42 ` Wolfram Sang
2026-08-18 14:32 ` Lad, Prabhakar
2026-07-06 17:51 ` [PATCH v3 02/12] rtc: rzn1: Handle EPROBE_DEFER for optional pps interrupt Prabhakar
2026-07-06 17:56 ` sashiko-bot
2026-08-18 7:43 ` Wolfram Sang
2026-07-06 17:51 ` [PATCH v3 03/12] rtc: rzn1: fix weekday underflow when alarm crosses month boundary Prabhakar
2026-07-06 18:00 ` sashiko-bot
2026-08-18 10:10 ` Wolfram Sang
2026-08-18 14:35 ` Lad, Prabhakar
2026-07-06 17:51 ` [PATCH v3 04/12] rtc: rzn1: Fix malformed MODULE_AUTHOR string Prabhakar
2026-07-06 17:53 ` sashiko-bot
2026-07-06 17:51 ` [PATCH v3 05/12] rtc: Kconfig: Broaden RTC_DRV_RZN1 dependency to ARCH_RENESAS Prabhakar
2026-07-06 17:54 ` sashiko-bot
2026-08-18 10:11 ` Wolfram Sang
2026-07-06 17:51 ` [PATCH v3 06/12] rtc: rzn1: Fix alarm range check truncation on 32-bit systems Prabhakar
2026-07-06 18:04 ` sashiko-bot
2026-08-18 10:32 ` Wolfram Sang
2026-07-06 17:51 ` [PATCH v3 07/12] rtc: rzn1: Replace remove callback with devm_add_action_or_reset() Prabhakar
2026-07-06 17:58 ` sashiko-bot
2026-08-18 10:37 ` Wolfram Sang
2026-07-06 17:51 ` [PATCH v3 08/12] rtc: rzn1: Dynamically calculate synchronization delay based on clock rate Prabhakar
2026-07-06 17:58 ` sashiko-bot
2026-08-18 10:49 ` Wolfram Sang [this message]
2026-08-18 14:37 ` Lad, Prabhakar
2026-07-06 17:51 ` [PATCH v3 09/12] rtc: rzn1: Use temporary variable for struct device Prabhakar
2026-07-06 17:56 ` sashiko-bot
2026-08-18 10:51 ` Wolfram Sang
2026-08-18 14:58 ` Lad, Prabhakar
2026-07-06 17:51 ` [PATCH v3 10/12] rtc: rzn1: Consistently use dev_err_probe() Prabhakar
2026-07-06 17:55 ` sashiko-bot
2026-07-06 17:51 ` [PATCH v3 11/12] rtc: rzn1: use FIELD_PREP/FIELD_GET and GENMASK for register access Prabhakar
2026-07-06 17:57 ` sashiko-bot
2026-08-18 11:19 ` Wolfram Sang
2026-07-06 17:51 ` [PATCH v3 12/12] rtc: rzn1: Add support for Renesas RZ/T2H and RZ/N2H SoCs Prabhakar
2026-07-06 18:03 ` sashiko-bot
2026-08-18 11:28 ` Wolfram Sang
2026-08-03 12:47 ` [PATCH v3 00/12] Add RTC " Lad, Prabhakar
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