From: Yangbo Lu <yangbo.lu@nxp.com>
To: linux-mmc@vger.kernel.org, ulf.hansson@linaro.org,
Adrian Hunter <adrian.hunter@intel.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Cc: devicetree@vger.kernel.org, Xiaobo Xie <xiaobo.xie@nxp.com>,
linux-arm-kernel@lists.infradead.org,
Yangbo Lu <yangbo.lu@nxp.com>
Subject: [PATCH 2/9] mmc: sdhci: add a callback for signal voltage switching
Date: Thu, 2 Mar 2017 17:47:23 +0800 [thread overview]
Message-ID: <1488448050-7574-3-git-send-email-yangbo.lu@nxp.com> (raw)
In-Reply-To: <1488448050-7574-1-git-send-email-yangbo.lu@nxp.com>
Add a callback for signal voltage switching to let host driver
switch signal voltage in its own way.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
drivers/mmc/host/sdhci.c | 6 ++++++
drivers/mmc/host/sdhci.h | 2 ++
2 files changed, 8 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6fdd7a7..3c9a924 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1852,6 +1852,12 @@ static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
if (host->version < SDHCI_SPEC_300)
return 0;
+ if (host->ops->start_signal_voltage_switch) {
+ ret = host->ops->start_signal_voltage_switch(
+ host, ios->signal_voltage);
+ return ret;
+ }
+
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
switch (ios->signal_voltage) {
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index edf3adf..04af687 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -566,6 +566,8 @@ struct sdhci_ops {
struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type);
+ int (*start_signal_voltage_switch)(struct sdhci_host *host,
+ unsigned char signal_voltage);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
2.1.0.27.g96db324
next prev parent reply other threads:[~2017-03-02 9:47 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-02 9:47 [PATCH 0/9] Add SD UHS-I and eMMC HS200 support for eSDHC Yangbo Lu
2017-03-02 9:47 ` [PATCH 1/9] mmc: sdhci-of-esdhc: add peripheral clock support Yangbo Lu
2017-03-02 9:47 ` Yangbo Lu [this message]
2017-03-02 14:19 ` [PATCH 2/9] mmc: sdhci: add a callback for signal voltage switching Adrian Hunter
2017-03-03 7:38 ` Y.B. Lu
2017-03-02 9:47 ` [PATCH 3/9] mmc: sdhci-of-esdhc: add support for signal voltage switch Yangbo Lu
2017-03-02 9:47 ` [PATCH 4/9] mmc: sdhci: add a callback for using tuning block Yangbo Lu
2017-03-02 14:25 ` Adrian Hunter
2017-03-03 7:39 ` Y.B. Lu
2017-03-02 9:47 ` [PATCH 5/9] mmc: sdhci-of-esdhc: add tuning block support Yangbo Lu
2017-03-02 9:47 ` [PATCH 6/9] mmc: sdhci: add a quirk to restore delay in tuning Yangbo Lu
2017-03-02 9:47 ` [PATCH 7/9] mmc: sdhci-of-esdhc: add delay between tuning cycles Yangbo Lu
2017-03-02 9:47 ` [PATCH 8/9] arm64: dts: ls1046a: add clocks property and compatible for eSDHC node Yangbo Lu
2017-03-02 9:47 ` [PATCH 9/9] arm64: dts: ls1046ardb: add MMC HS200/UHS-1 modes support Yangbo Lu
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