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[84.72.156.211]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a35ca4d105sm18101588f8f.11.2025.05.20.15.50.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 May 2025 15:50:48 -0700 (PDT) From: Lothar Rubusch To: jic23@kernel.org, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, corbet@lwn.net, lucas.p.stankus@gmail.com, lars@metafoo.de, Michael.Hennerich@analog.com, l.rubusch@gmail.com Cc: linux-iio@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 11/12] iio: accel: adxl313: implement power-save on inactivity Date: Tue, 20 May 2025 22:50:06 +0000 Message-Id: <20250520225007.10990-12-l.rubusch@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250520225007.10990-1-l.rubusch@gmail.com> References: <20250520225007.10990-1-l.rubusch@gmail.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Link activity and inactivity to indicate the internal power-saving state. Add auto-sleep to be linked to inactivity. Signed-off-by: Lothar Rubusch --- drivers/iio/accel/adxl313.h | 3 +++ drivers/iio/accel/adxl313_core.c | 29 ++++++++++++++++++++++++++--- 2 files changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/iio/accel/adxl313.h b/drivers/iio/accel/adxl313.h index 1398ac54d19b..eafdf8f57816 100644 --- a/drivers/iio/accel/adxl313.h +++ b/drivers/iio/accel/adxl313.h @@ -41,6 +41,9 @@ #define ADXL313_RATE_BASE 6 #define ADXL313_POWER_CTL_MSK BIT(3) +#define ADXL313_POWER_CTL_INACT_MSK GENMASK(5, 4) +#define ADXL313_POWER_CTL_LINK BIT(5) +#define ADXL313_POWER_CTL_AUTO_SLEEP BIT(4) #define ADXL313_MEASUREMENT_MODE BIT(3) #define ADXL313_MEASUREMENT_STANDBY 0x00 diff --git a/drivers/iio/accel/adxl313_core.c b/drivers/iio/accel/adxl313_core.c index 7356aacd8874..2b24e6b01f1f 100644 --- a/drivers/iio/accel/adxl313_core.c +++ b/drivers/iio/accel/adxl313_core.c @@ -390,6 +390,7 @@ static int adxl313_set_act_inact_en(struct adxl313_data *data, unsigned int axis_ctrl; unsigned int threshold; unsigned int inact_time_s; + int act_en, inact_en; bool en; int ret; @@ -418,9 +419,31 @@ static int adxl313_set_act_inact_en(struct adxl313_data *data, en = en && inact_time_s; } - return regmap_update_bits(data->regmap, ADXL313_REG_INT_ENABLE, - adxl313_act_int_reg[type], - en ? adxl313_act_int_reg[type] : 0); + ret = regmap_update_bits(data->regmap, ADXL313_REG_INT_ENABLE, + adxl313_act_int_reg[type], + en ? adxl313_act_int_reg[type] : 0); + if (ret) + return ret; + + /* + * Advanced power saving: Set sleep and link bit only when ACT and INACT + * are set. Check enable against regmap cached values. + */ + act_en = adxl313_is_act_inact_en(data, ADXL313_ACTIVITY); + if (act_en < 0) + return act_en; + + inact_en = adxl313_is_act_inact_en(data, ADXL313_INACTIVITY); + if (inact_en < 0) + return inact_en; + + en = en && act_en && inact_en; + + return regmap_update_bits(data->regmap, + ADXL313_REG_POWER_CTL, + ADXL313_POWER_CTL_INACT_MSK, + en ? + (ADXL313_POWER_CTL_AUTO_SLEEP | ADXL313_POWER_CTL_LINK) : 0); } static int adxl313_read_raw(struct iio_dev *indio_dev, -- 2.39.5