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Mon, 07 Jul 2025 13:01:19 -0700 (PDT) Received: from iku.example.org ([2a06:5906:61b:2d00:d418:e5eb:1bc:30dd]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b471b97376sm11268995f8f.61.2025.07.07.13.01.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Jul 2025 13:01:19 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Wim Van Sebroeck , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Philipp Zabel , Wolfram Sang , linux-watchdog@vger.kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar , Biju Das , Fabrizio Castro , Lad Prabhakar Subject: [PATCH 3/9] watchdog: rzv2h_wdt: Obtain CKS divider via OF data Date: Mon, 7 Jul 2025 21:01:05 +0100 Message-ID: <20250707200111.329663-4-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250707200111.329663-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20250707200111.329663-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Lad Prabhakar Update the rzv2h_wdt driver to obtain the clock division ratio (`cks_div`) from OF match data instead of using a hardcoded value. This allows the driver to support SoCs where the clock divider differs from the default value of 256. This change is a preparatory step for supporting the RZ/T2H SoC, which requires a divider value of 8192. Signed-off-by: Lad Prabhakar --- drivers/watchdog/rzv2h_wdt.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/watchdog/rzv2h_wdt.c b/drivers/watchdog/rzv2h_wdt.c index d64d29709160..c2f39dd56687 100644 --- a/drivers/watchdog/rzv2h_wdt.c +++ b/drivers/watchdog/rzv2h_wdt.c @@ -36,7 +36,6 @@ #define WDTRCR_RSTIRQS BIT(7) =20 #define MAX_TIMEOUT_CYCLES 16384 -#define CLOCK_DIV_BY_256 256 =20 #define WDT_DEFAULT_TIMEOUT 60U =20 @@ -48,6 +47,7 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped on= ce started (default=3D" struct rzv2h_of_data { u8 cks_min; u8 cks_max; + u16 cks_div; }; =20 struct rzv2h_wdt_priv { @@ -238,7 +238,7 @@ static int rzv2h_wdt_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(priv->rstc), "failed to get cpg reset"); =20 - priv->wdev.max_hw_heartbeat_ms =3D (MILLI * MAX_TIMEOUT_CYCLES * CLOCK_DI= V_BY_256) / + priv->wdev.max_hw_heartbeat_ms =3D (MILLI * MAX_TIMEOUT_CYCLES * priv->of= _data->cks_div) / clk_get_rate(priv->oscclk); dev_dbg(dev, "max hw timeout of %dms\n", priv->wdev.max_hw_heartbeat_ms); =20 @@ -265,6 +265,7 @@ static int rzv2h_wdt_probe(struct platform_device *pdev) static const struct rzv2h_of_data rzv2h_wdt_of_data =3D { .cks_min =3D WDTCR_CKS_CLK_1, .cks_max =3D WDTCR_CKS_CLK_256, + .cks_div =3D 256, }; =20 static const struct of_device_id rzv2h_wdt_ids[] =3D { --=20 2.49.0