From: Shawn Guo <shawnguo@kernel.org>
To: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
Cc: s.hauer@pengutronix.de, kernel@pengutronix.de,
festevam@gmail.com, linux-imx@nxp.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Haibo Chen <haibo.chen@nxp.com>, Peng Fan <peng.fan@nxp.com>,
Marco Felsch <m.felsch@pengutronix.de>
Subject: Re: [PATCH V6 11/12] arm64: dts: imx8m[m,q]-evk: change to use off-on-delay-us in regulator
Date: Sat, 19 Nov 2022 11:11:58 +0800 [thread overview]
Message-ID: <20221119031157.GL16229@T480> (raw)
In-Reply-To: <20221117095403.1876071-12-peng.fan@oss.nxp.com>
On Thu, Nov 17, 2022 at 05:54:02PM +0800, Peng Fan (OSS) wrote:
> From: Haibo Chen <haibo.chen@nxp.com>
>
> Some SD Card controller and power circuitry has increased capacitance,
> so the usual toggling of regulator to power the card off and on
> is insufficient.
>
> According to SD spec, for sd card power reset operation, the sd card
> supply voltage needs to be lower than 0.5v and keep over 1ms, otherwise,
> next time power back the sd card supply voltage to 3.3v, sd card can't
> support SD3.0 mode again.
>
> This patch add the off-on-delay-us, make sure the sd power reset behavior
> is align with the specification. Without this patch, when do quick system
> suspend/resume test, some sd card can't work at SD3.0 mode after system
> resume back.
>
> Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Applied, thanks!
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next prev parent reply other threads:[~2022-11-19 3:13 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-17 9:53 [PATCH V6 00/12] arm64: dts: imx8m-evk: misc dts update Peng Fan (OSS)
2022-11-17 9:53 ` [PATCH V6 01/12] arm64: dts: imx8mp: add mlmix power domain Peng Fan (OSS)
2022-11-19 2:59 ` Shawn Guo
2022-11-17 9:53 ` [PATCH V6 02/12] arm64: dts: imx8mp-evk: correct pcie pad settings Peng Fan (OSS)
2022-11-19 3:01 ` Shawn Guo
2022-11-17 9:53 ` [PATCH V6 03/12] ARM64: dts: imx8mp-evk: add pwm support Peng Fan (OSS)
2022-11-19 3:02 ` Shawn Guo
2022-11-17 9:53 ` [PATCH V6 04/12] arm64: dts: imx8mp-evk: enable uart1/3 ports Peng Fan (OSS)
2022-11-19 3:04 ` Shawn Guo
2022-11-17 9:53 ` [PATCH V6 05/12] arm64: dts: imx8mp-evk: enable fspi nor on imx8mp evk Peng Fan (OSS)
2022-11-19 3:05 ` Shawn Guo
2022-11-17 9:53 ` [PATCH V6 06/12] arm64: dts: imx8mp-evk: enable I2C2 node Peng Fan (OSS)
2022-11-19 3:06 ` Shawn Guo
2022-11-17 9:53 ` [PATCH V6 07/12] arm64: dts: imx8mn-evk: update vdd_soc dvs voltage Peng Fan (OSS)
2022-11-17 10:17 ` Marco Felsch
2022-11-19 3:07 ` Shawn Guo
2022-11-17 9:53 ` [PATCH V6 08/12] arm64: dts: imx8mn-evk: set off-on-delay-us in regulator Peng Fan (OSS)
2022-11-19 3:08 ` Shawn Guo
2022-11-17 9:54 ` [PATCH V6 09/12] arm64: dts: imx8mn-evk: add i2c gpio recovery settings Peng Fan (OSS)
2022-11-19 3:09 ` Shawn Guo
2022-11-17 9:54 ` [PATCH V6 10/12] arm64: dts: imx8mn-evk: enable uart1 Peng Fan (OSS)
2022-11-19 3:10 ` Shawn Guo
2022-11-17 9:54 ` [PATCH V6 11/12] arm64: dts: imx8m[m,q]-evk: change to use off-on-delay-us in regulator Peng Fan (OSS)
2022-11-19 3:11 ` Shawn Guo [this message]
2022-11-17 9:54 ` [PATCH V6 12/12] arm64: dts: imx8mm-evk: add vcc supply for pca6416 Peng Fan (OSS)
2022-11-19 3:12 ` Shawn Guo
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