Linux ARM-MSM sub-architecture
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From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
To: Saikiran B <bjsaikiran@gmail.com>, Bryan O'Donoghue <bod@kernel.org>
Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	rfoss@kernel.org, todor.too@gmail.com,
	vladimir.zapolskiy@linaro.org, hansg@kernel.org,
	sakari.ailus@linux.intel.com, mchehab@kernel.org,
	stable@vger.kernel.org
Subject: Re: [PATCH v2 1/1] media: i2c: ov02c10: Keep power on and use reset for power management
Date: Mon, 26 Jan 2026 12:41:34 +0000	[thread overview]
Message-ID: <eaf30b60-c0fb-4cf5-bc37-274faa187734@linaro.org> (raw)
In-Reply-To: <CAAFDt1ukAdXwADuFVoZrs6Ay2fB_sq6LMW5FCnsjqUL7V62mfg@mail.gmail.com>

On 26/01/2026 12:24, Saikiran B wrote:
> Yes, I implemented your suggested sequence in power_on():
> 
> Assert XSHUTDOWN (Reset GPIO = 1)

+5 milliseconds

> Enable Regulators
> Enable Clock
> Wait 2ms+
> Release XSHUTDOWN (Reset GPIO = 0)
> 
> Even with this sequence, the brownout prevents detection if the
> off-time was ~2.3s (I got this 2.3s number by conducting extensive
> stress tests on the platform starting from 50ms to 3s. At 2.3s the
> success rate was 100%. Anything below 2.3s, the sensor entered a
> brownout state atleast once.)
> 
> Thanks & Regards,
> Saikiran

?

---
bod

  reply	other threads:[~2026-01-26 12:41 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-25 17:17 [PATCH v2 0/2] Fix OV02C10 camera pipeline lock issues Saikiran
2026-01-25 17:17 ` [PATCH v2 1/2] media: qcom: camss: Fix pipeline lock leak in stop_streaming Saikiran
2026-01-25 17:17 ` [PATCH v2 2/2] media: i2c: ov02c10: Check for errors in disable_streams Saikiran
2026-01-26 10:13   ` Konrad Dybcio
2026-01-26 10:21   ` Hans de Goede
2026-01-26  6:15 ` [PATCH v2 0/1] media: i2c: ov02c10: Keep power on and use reset for power management Saikiran
2026-01-26  6:15   ` [PATCH v2 1/1] " Saikiran
2026-01-26 10:32     ` Hans de Goede
2026-01-26 10:59       ` Saikiran B
2026-01-26 11:09     ` Bryan O'Donoghue
2026-01-26 11:23       ` Saikiran B
2026-01-26 11:41         ` Bryan O'Donoghue
2026-01-26 11:58           ` Saikiran B
2026-01-26 12:06             ` Bryan O'Donoghue
2026-01-26 12:24               ` Saikiran B
2026-01-26 12:41                 ` Bryan O'Donoghue [this message]
2026-01-26 12:48                   ` Saikiran B
2026-01-26 13:31                     ` Hans de Goede
     [not found]                       ` <I-1OPz69QKXF-LDqvufQARvv_3TIYaLyZIETdiGvSj_JSYhnJNeqiLERDUH2R0kclFyo6MqMRsaiZaS3RKmdZA==@protonmail.internalid>
     [not found]                         ` <CAAFDt1ufYyM4_xTy+AZTdXBB0cGNk+nFQHD5+5U7tUMQqZ+o=g@mail.gmail.com>
2026-01-26 15:04                           ` Bryan O'Donoghue
2026-01-26 15:40                             ` Saikiran B
2026-01-26 16:00                               ` Bryan O'Donoghue

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