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([82.78.167.161]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aa625eee2a6sm226877866b.90.2024.12.06.03.14.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2024 03:14:07 -0800 (PST) From: Claudiu X-Google-Original-From: Claudiu To: prabhakar.mahadev-lad.rj@bp.renesas.com, jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com, mturquette@baylibre.com, sboyd@kernel.org, p.zabel@pengutronix.de Cc: claudiu.beznea@tuxon.dev, linux-iio@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, Claudiu Beznea Subject: [PATCH v2 08/15] iio: adc: rzg2l_adc: Enable runtime PM autosuspend support Date: Fri, 6 Dec 2024 13:13:30 +0200 Message-Id: <20241206111337.726244-9-claudiu.beznea.uj@bp.renesas.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20241206111337.726244-1-claudiu.beznea.uj@bp.renesas.com> References: <20241206111337.726244-1-claudiu.beznea.uj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Claudiu Beznea Enable runtime PM autosuspend support for the rzg2l_adc driver. With this change, consecutive conversion requests will no longer cause the device to be runtime-enabled/disabled after each request. Instead, the device will transition based on the delay configured by the user. This approach reduces the frequency of hardware register access during runtime PM suspend/resume cycles, thereby saving CPU cycles. Signed-off-by: Claudiu Beznea Reviewed-by: Lad Prabhakar --- Changes in v2: - used a non-zero default autosusped delay - adjusted the patch description to reflect that the default autosuspend delay has been changed drivers/iio/adc/rzg2l_adc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/rzg2l_adc.c b/drivers/iio/adc/rzg2l_adc.c index 953511191eac..c3f9f95cdbba 100644 --- a/drivers/iio/adc/rzg2l_adc.c +++ b/drivers/iio/adc/rzg2l_adc.c @@ -208,7 +208,8 @@ static int rzg2l_adc_conversion(struct iio_dev *indio_dev, struct rzg2l_adc *adc rzg2l_adc_start_stop(adc, false); rpm_put: - pm_runtime_put_sync(dev); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); return ret; } @@ -372,7 +373,8 @@ static int rzg2l_adc_hw_init(struct device *dev, struct rzg2l_adc *adc) rzg2l_adc_writel(adc, RZG2L_ADM(3), reg); exit_hw_init: - pm_runtime_put_sync(dev); + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); return ret; } @@ -410,6 +412,8 @@ static int rzg2l_adc_probe(struct platform_device *pdev) "failed to get/deassert presetn\n"); } + pm_runtime_set_autosuspend_delay(dev, 300); + pm_runtime_use_autosuspend(dev); ret = devm_pm_runtime_enable(dev); if (ret) return ret;