From: Marek Vasut <marex@denx.de>
To: Yann Gautier <yann.gautier@foss.st.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Russell King <linux@armlinux.org.uk>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Linus Walleij <linus.walleij@linaro.org>,
Vladimir Zapolskiy <vz@mleia.com>,
u.kleine-koenig@pengutronix.de,
Christophe Kerello <christophe.kerello@foss.st.com>,
Ludovic Barre <ludovic.barre@foss.st.com>,
linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 4/4] mmc: mmci: add hs200 support for stm32 sdmmc
Date: Thu, 16 Dec 2021 10:14:45 +0100 [thread overview]
Message-ID: <c4528bc5-a826-a4ed-c4d6-e0ab84651ea2@denx.de> (raw)
In-Reply-To: <20211215141727.4901-5-yann.gautier@foss.st.com>
On 12/15/21 15:17, Yann Gautier wrote:
> Use feedback clock for HS200 mode, as for SDR104.
> The HS200 mode can be enabled through DT by using mmc-hs200-1_8v.
> It is possible to use it on STM32MP13, but not STM32MP15 platforms.
HS200 is possible even on the MP15, it just doesn't yield any
(performance) benefits due to the slower bus clock (125 MHz or so?), so
it isn't worth enabling it on MP15. It is nice to see MP13 can do better.
next prev parent reply other threads:[~2021-12-16 9:14 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-15 14:17 [PATCH 0/4] mmc: mmci: updates for STM32MP13 Yann Gautier
2021-12-15 14:17 ` [PATCH 1/4] mmc: mmci: Add support for sdmmc variant revision v2.2 Yann Gautier
2021-12-15 14:17 ` [PATCH 2/4] mmc: mmci: increase stm32 sdmmcv2 clock max freq Yann Gautier
2021-12-15 14:17 ` [PATCH 3/4] mmc: mmci: stm32: clear DLYB_CR after sending tuning command Yann Gautier
2021-12-16 9:13 ` Marek Vasut
2021-12-16 9:48 ` Yann Gautier
2021-12-21 13:02 ` Ulf Hansson
2021-12-15 14:17 ` [PATCH 4/4] mmc: mmci: add hs200 support for stm32 sdmmc Yann Gautier
2021-12-16 9:14 ` Marek Vasut [this message]
2021-12-16 9:44 ` Yann Gautier
2021-12-16 10:15 ` Marek Vasut
2021-12-16 3:23 ` [PATCH 0/4] mmc: mmci: updates for STM32MP13 Linus Walleij
2021-12-21 13:02 ` Ulf Hansson
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