linux-kernel - [PATCH 06/15] spi: spi-offload-trigger-pwm: Use duty offset

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Message-ID: <2410525339f56466fa566dda367678ec92f9fb98.1756511030.git.marcelo.schmitt@analog.com>
Date: Fri, 29 Aug 2025 21:42:26 -0300
From: Marcelo Schmitt <marcelo.schmitt@...log.com>
To: <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-spi@...r.kernel.org>
CC: Axel Haslam <ahaslam@...libre.com>, <jic23@...nel.org>,
        <Michael.Hennerich@...log.com>, <nuno.sa@...log.com>,
        <eblanc@...libre.com>, <dlechner@...libre.com>, <andy@...nel.org>,
        <corbet@....net>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <broonie@...nel.org>,
        <Jonathan.Cameron@...wei.com>, <andriy.shevchenko@...ux.intel.com>,
        <marcelo.schmitt1@...il.com>
Subject: [PATCH 06/15] spi: spi-offload-trigger-pwm: Use duty offset

From: Axel Haslam <ahaslam@...libre.com>

Pass the duty offset to the waveform pwm.

Signed-off-by: Axel Haslam <ahaslam@...libre.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@...log.com>
---
 drivers/spi/spi-offload-trigger-pwm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-offload-trigger-pwm.c b/drivers/spi/spi-offload-trigger-pwm.c
index 805ed41560df..8413aeb3689d 100644
--- a/drivers/spi/spi-offload-trigger-pwm.c
+++ b/drivers/spi/spi-offload-trigger-pwm.c
@@ -51,13 +51,13 @@ static int spi_offload_trigger_pwm_validate(struct spi_offload_trigger *trigger,
 	wf.period_length_ns = DIV_ROUND_UP_ULL(NSEC_PER_SEC, periodic->frequency_hz);
 	/* REVISIT: 50% duty-cycle for now - may add config parameter later */
 	wf.duty_length_ns = wf.period_length_ns / 2;
-
+	wf.duty_offset_ns = periodic->offset_ns;
 	ret = pwm_round_waveform_might_sleep(st->pwm, &wf);
 	if (ret < 0)
 		return ret;
 
 	periodic->frequency_hz = DIV_ROUND_UP_ULL(NSEC_PER_SEC, wf.period_length_ns);
-
+	periodic->offset_ns = wf.duty_offset_ns;
 	return 0;
 }
 
@@ -77,6 +77,7 @@ static int spi_offload_trigger_pwm_enable(struct spi_offload_trigger *trigger,
 	wf.period_length_ns = DIV_ROUND_UP_ULL(NSEC_PER_SEC, periodic->frequency_hz);
 	/* REVISIT: 50% duty-cycle for now - may add config parameter later */
 	wf.duty_length_ns = wf.period_length_ns / 2;
+	wf.duty_offset_ns = periodic->offset_ns;
 
 	return pwm_set_waveform_might_sleep(st->pwm, &wf, false);
 }
-- 
2.39.2