From: Peng Fan <peng.fan@oss.nxp.com>
To: Sherry Sun <sherry.sun@nxp.com>
Cc: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com,
kernel@pengutronix.de, devicetree@vger.kernel.org,
imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2] arm64: dts: imx93-evk/qsb: add m2-pcm-level-shifter-hog to enable BT HFP
Date: Thu, 22 Jan 2026 16:53:16 +0800 [thread overview]
Message-ID: <aXHlfIDSgFqiUuiF@shlinux89> (raw)
In-Reply-To: <20260121111346.2598783-1-sherry.sun@nxp.com>
On Wed, Jan 21, 2026 at 07:13:46PM +0800, Sherry Sun wrote:
>For i.MX93 11x11 EVK and 9x9 QSB boards, add the gpio-hog to enable the
>M.2 PCM pins level shifter connected between soc sai1 interface and M.2
>PCM pins so that HFP feature can be supported.
>
>Since the HFP is only used at a later stage — after the BT firmware has
>been downloaded and the BT connection with the remote device has been
>established — both the pcal6524 expander and sai1 interface are already
>fully initialized and available by that time. Therefore, using a
>gpio-hog here will not introduce any probe ordering or dependency issues
>for the HFP use case.
>
>Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
next prev parent reply other threads:[~2026-01-22 8:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-21 11:13 [PATCH V2] arm64: dts: imx93-evk/qsb: add m2-pcm-level-shifter-hog to enable BT HFP Sherry Sun
2026-01-22 8:53 ` Peng Fan [this message]
2026-01-22 14:35 ` Frank Li
2026-02-24 16:43 ` Frank Li
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