From: Victor Shih <victorshihgli@gmail.com>
To: ulf.hansson@linaro.org, adrian.hunter@intel.com
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw,
Greg.tu@genesyslogic.com.tw, takahiro.akashi@linaro.org,
dlunev@chromium.org,
Victor Shih <victor.shih@genesyslogic.com.tw>,
Ben Chuang <ben.chuang@genesyslogic.com.tw>
Subject: [PATCH V6 12/24] mmc: sdhci-uhs2: skip signal_voltage_switch()
Date: Tue, 13 Dec 2022 17:00:35 +0800 [thread overview]
Message-ID: <20221213090047.3805-13-victor.shih@genesyslogic.com.tw> (raw)
In-Reply-To: <20221213090047.3805-1-victor.shih@genesyslogic.com.tw>
For UHS2, the signal voltage is supplied by vdd2 which is already 1.8v,
so no voltage switch required.
Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
---
drivers/mmc/host/sdhci-uhs2.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index 780491781613..2342c05c4cdb 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -141,6 +141,27 @@ static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode,
}
}
+/*****************************************************************************\
+ * *
+ * MMC callbacks *
+ * *
+\*****************************************************************************/
+
+static int sdhci_uhs2_start_signal_voltage_switch(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ /*
+ * For UHS2, the signal voltage is supplied by vdd2 which is
+ * already 1.8v so no voltage switch required.
+ */
+ if (sdhci_uhs2_mode(host))
+ return 0;
+
+ return sdhci_start_signal_voltage_switch(mmc, ios);
+}
+
/*****************************************************************************\
* *
* Driver init/exit *
@@ -149,6 +170,9 @@ static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode,
static int sdhci_uhs2_host_ops_init(struct sdhci_host *host)
{
+ host->mmc_host_ops.start_signal_voltage_switch =
+ sdhci_uhs2_start_signal_voltage_switch;
+
return 0;
}
--
2.25.1
next prev parent reply other threads:[~2022-12-13 9:03 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-13 9:00 [PATCH V6 00/24] Add support UHS-II for GL9755 Victor Shih
2022-12-13 9:00 ` [PATCH V6 01/24] mmc: core: Cleanup printing of speed mode at card insertion Victor Shih
2023-01-05 21:22 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 02/24] mmc: core: Prepare to support SD UHS-II cards Victor Shih
2022-12-13 9:00 ` [PATCH V6 03/24] mmc: core: Announce successful insertion of an SD UHS-II card Victor Shih
2022-12-13 9:00 ` [PATCH V6 04/24] mmc: core: Extend support for mmc regulators with a vqmmc2 Victor Shih
2022-12-13 9:00 ` [PATCH V6 05/24] mmc: core: Add definitions for SD UHS-II cards Victor Shih
2023-02-06 16:13 ` Ulf Hansson
2023-02-24 10:23 ` Victor Shih
2023-02-27 15:29 ` Ulf Hansson
2023-02-07 10:59 ` Ulf Hansson
2022-12-13 9:00 ` [PATCH V6 06/24] mmc: core: Support UHS-II card control and access Victor Shih
2023-01-05 21:26 ` Adrian Hunter
2023-02-08 15:30 ` Ulf Hansson
2023-02-24 10:23 ` Victor Shih
2023-02-27 15:19 ` Ulf Hansson
2022-12-13 9:00 ` [PATCH V6 07/24] mmc: sdhci: add UHS-II related definitions in headers Victor Shih
2023-01-05 21:22 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 08/24] mmc: sdhci: add UHS-II module and add a kernel configuration Victor Shih
2022-12-13 9:00 ` [PATCH V6 09/24] mmc: sdhci-uhs2: dump UHS-II registers Victor Shih
2023-01-05 21:26 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 10/24] mmc: sdhci-uhs2: add reset function and uhs2_mode function Victor Shih
2022-12-13 9:00 ` [PATCH V6 11/24] mmc: sdhci-uhs2: add set_power() to support vdd2 Victor Shih
2023-01-05 21:27 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` Victor Shih [this message]
2022-12-13 9:00 ` [PATCH V6 13/24] mmc: sdhci-uhs2: add set_timeout() Victor Shih
2022-12-13 9:00 ` [PATCH V6 14/24] mmc: sdhci-uhs2: add set_ios() Victor Shih
2023-01-05 21:27 ` Adrian Hunter
2023-01-26 10:58 ` Victor Shih
2023-01-30 13:16 ` Adrian Hunter
2023-02-24 10:23 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 15/24] mmc: sdhci-uhs2: add detect_init() to detect the interface Victor Shih
2023-01-05 21:28 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 16/24] mmc: sdhci-uhs2: add clock operations Victor Shih
2022-12-13 9:00 ` [PATCH V6 17/24] mmc: sdhci-uhs2: add uhs2_control() to initialise the interface Victor Shih
2023-01-05 21:28 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 18/24] mmc: sdhci-uhs2: add request() and others Victor Shih
2023-01-05 21:29 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 19/24] mmc: sdhci-uhs2: add irq() " Victor Shih
2023-01-05 21:30 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 20/24] mmc: sdhci-uhs2: add add_host() and others to set up the driver Victor Shih
2023-01-05 21:30 ` Adrian Hunter
2023-02-24 10:23 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 21/24] mmc: sdhci-uhs2: add pre-detect_init hook Victor Shih
2022-12-13 9:00 ` [PATCH V6 22/24] mmc: sdhci-uhs2: add post-mmc_attach_sd hook Victor Shih
2023-01-05 21:31 ` Adrian Hunter
2023-02-24 10:23 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 23/24] mmc: sdhci-pci: add UHS-II support framework Victor Shih
2022-12-13 9:00 ` [PATCH V6 24/24] mmc: sdhci-pci-gli: enable UHS-II mode for GL9755 Victor Shih
2023-02-08 11:35 ` Ulf Hansson
2023-01-03 11:04 ` [PATCH V6 00/24] Add support UHS-II " Victor Shih
2023-01-03 11:47 ` Ulf Hansson
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