From: Marc Gonzalez <marc.w.gonzalez@free.fr>
To: Ulf Hansson <ulf.hansson@linaro.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Pierre-Hugues Husson <phh@phh.me>,
Heiner Kallweit <hkallweit1@gmail.com>,
Rong Chen <rong.chen@amlogic.com>,
Yang Yingliang <yangyingliang@huawei.com>
Cc: MMC <linux-mmc@vger.kernel.org>, AML <linux-amlogic@lists.infradead.org>
Subject: [PATCH] mmc: meson-gx: increase power-up delay
Date: Tue, 14 Mar 2023 18:24:41 +0100 [thread overview]
Message-ID: <11a8a0c8-a5b1-8f38-a139-97172ab7be68@free.fr> (raw)
With the default power-up delay, on small kernels, the host probes
too soon, and mmc_send_io_op_cond() times out.
Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
---
Stress-tested with 80 cold boots, checking every time
mmc2: new ultra high speed SDR50 SDIO card at address 0001
IIUC, this will also slow down SD & MMC probing,
but an additional 20 ms seems acceptable?
---
drivers/mmc/host/meson-gx-mmc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
index 6e5ea0213b477..73ecbcf588c65 100644
--- a/drivers/mmc/host/meson-gx-mmc.c
+++ b/drivers/mmc/host/meson-gx-mmc.c
@@ -1182,6 +1182,7 @@ static int meson_mmc_probe(struct platform_device *pdev)
mmc = mmc_alloc_host(sizeof(struct meson_host), &pdev->dev);
if (!mmc)
return -ENOMEM;
+ mmc->ios.power_delay_ms = 20;
host = mmc_priv(mmc);
host->mmc = mmc;
host->dev = &pdev->dev;
--
2.25.1
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next reply other threads:[~2023-03-14 17:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-14 17:24 Marc Gonzalez [this message]
2023-03-14 19:45 ` Heiner Kallweit
2023-03-15 10:20 ` Marc Gonzalez
2023-03-15 15:27 ` Jerome Brunet
2023-03-15 21:14 ` Heiner Kallweit
2023-03-16 12:32 ` Marc Gonzalez
2023-03-16 13:02 ` Marc Gonzalez
2023-03-16 11:59 ` Ulf Hansson
2023-03-16 16:32 ` Marc Gonzalez
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