From: Ulf Hansson <ulf.hansson@linaro.org> To: Ludovic Barre <ludovic.barre@st.com> Cc: Rob Herring <robh+dt@kernel.org>, Srinivas Kandagatla <srinivas.kandagatla@linaro.org>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@st.com>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, DTML <devicetree@vger.kernel.org>, "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>, linux-stm32@st-md-mailman.stormreply.com Subject: Re: [PATCH 7/9] mmc: mmci: add volt_switch callbacks Date: Fri, 24 Jan 2020 14:12:36 +0100 [thread overview] Message-ID: <CAPDyKFqt6SuQh8V1_2-2HzBixR2HTKM+1FKgYuNA1zytc22W7g@mail.gmail.com> (raw) In-Reply-To: <20200110134823.14882-8-ludovic.barre@st.com> On Fri, 10 Jan 2020 at 14:49, Ludovic Barre <ludovic.barre@st.com> wrote: > > This patch adds 2 voltage switch callbacks in mmci_host_ops: > -prep_volt_switch allows to prepare voltage switch before to > sent the SD_SWITCH_VOLTAGE command (cmd11). > -volt_switch callback allows to define specific action after > regulator set voltage. I am fine with adding these callbacks, however I strongly suggest to have a reference to "signal voltage" in the name of the callbacks. As to avoid confusion for what there are used for. Perhaps ->post_sig_volt_switch() and ->pre_sig_volt_switch() can work? > > Signed-off-by: Ludovic Barre <ludovic.barre@st.com> > --- > drivers/mmc/host/mmci.c | 8 ++++++++ > drivers/mmc/host/mmci.h | 2 ++ > 2 files changed, 10 insertions(+) > > diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c > index 00b473f57047..d76a59c06cb0 100644 > --- a/drivers/mmc/host/mmci.c > +++ b/drivers/mmc/host/mmci.c > @@ -22,6 +22,7 @@ > #include <linux/mmc/pm.h> > #include <linux/mmc/host.h> > #include <linux/mmc/card.h> > +#include <linux/mmc/sd.h> > #include <linux/mmc/slot-gpio.h> > #include <linux/amba/bus.h> > #include <linux/clk.h> > @@ -1207,6 +1208,9 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) > writel_relaxed(clks, host->base + MMCIDATATIMER); > } > > + if (host->ops->prep_volt_switch && cmd->opcode == SD_SWITCH_VOLTAGE) > + host->ops->prep_volt_switch(host); > + > if (/*interrupt*/0) > c |= MCI_CPSM_INTERRUPT; > > @@ -1820,6 +1824,7 @@ static int mmci_get_cd(struct mmc_host *mmc) > > static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) > { > + struct mmci_host *host = mmc_priv(mmc); > int ret = 0; > > if (!IS_ERR(mmc->supply.vqmmc)) { > @@ -1839,6 +1844,9 @@ static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) > break; > } > > + if (!ret && host->ops && host->ops->volt_switch) > + ret = host->ops->volt_switch(host, ios); > + > if (ret) > dev_warn(mmc_dev(mmc), "Voltage switch failed\n"); > } > diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h > index ddcdfb827996..c04a144259a2 100644 > --- a/drivers/mmc/host/mmci.h > +++ b/drivers/mmc/host/mmci.h > @@ -377,6 +377,8 @@ struct mmci_host_ops { > void (*set_clkreg)(struct mmci_host *host, unsigned int desired); > void (*set_pwrreg)(struct mmci_host *host, unsigned int pwr); > bool (*busy_complete)(struct mmci_host *host, u32 status, u32 err_msk); > + void (*prep_volt_switch)(struct mmci_host *host); > + int (*volt_switch)(struct mmci_host *host, struct mmc_ios *ios); > }; > > struct mmci_host { > -- > 2.17.1 > Kind regards Uffe
WARNING: multiple messages have this Message-ID (diff)
From: Ulf Hansson <ulf.hansson@linaro.org> To: Ludovic Barre <ludovic.barre@st.com> Cc: DTML <devicetree@vger.kernel.org>, Alexandre Torgue <alexandre.torgue@st.com>, "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Rob Herring <robh+dt@kernel.org>, Srinivas Kandagatla <srinivas.kandagatla@linaro.org>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, linux-stm32@st-md-mailman.stormreply.com, Linux ARM <linux-arm-kernel@lists.infradead.org> Subject: Re: [PATCH 7/9] mmc: mmci: add volt_switch callbacks Date: Fri, 24 Jan 2020 14:12:36 +0100 [thread overview] Message-ID: <CAPDyKFqt6SuQh8V1_2-2HzBixR2HTKM+1FKgYuNA1zytc22W7g@mail.gmail.com> (raw) In-Reply-To: <20200110134823.14882-8-ludovic.barre@st.com> On Fri, 10 Jan 2020 at 14:49, Ludovic Barre <ludovic.barre@st.com> wrote: > > This patch adds 2 voltage switch callbacks in mmci_host_ops: > -prep_volt_switch allows to prepare voltage switch before to > sent the SD_SWITCH_VOLTAGE command (cmd11). > -volt_switch callback allows to define specific action after > regulator set voltage. I am fine with adding these callbacks, however I strongly suggest to have a reference to "signal voltage" in the name of the callbacks. As to avoid confusion for what there are used for. Perhaps ->post_sig_volt_switch() and ->pre_sig_volt_switch() can work? > > Signed-off-by: Ludovic Barre <ludovic.barre@st.com> > --- > drivers/mmc/host/mmci.c | 8 ++++++++ > drivers/mmc/host/mmci.h | 2 ++ > 2 files changed, 10 insertions(+) > > diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c > index 00b473f57047..d76a59c06cb0 100644 > --- a/drivers/mmc/host/mmci.c > +++ b/drivers/mmc/host/mmci.c > @@ -22,6 +22,7 @@ > #include <linux/mmc/pm.h> > #include <linux/mmc/host.h> > #include <linux/mmc/card.h> > +#include <linux/mmc/sd.h> > #include <linux/mmc/slot-gpio.h> > #include <linux/amba/bus.h> > #include <linux/clk.h> > @@ -1207,6 +1208,9 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) > writel_relaxed(clks, host->base + MMCIDATATIMER); > } > > + if (host->ops->prep_volt_switch && cmd->opcode == SD_SWITCH_VOLTAGE) > + host->ops->prep_volt_switch(host); > + > if (/*interrupt*/0) > c |= MCI_CPSM_INTERRUPT; > > @@ -1820,6 +1824,7 @@ static int mmci_get_cd(struct mmc_host *mmc) > > static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) > { > + struct mmci_host *host = mmc_priv(mmc); > int ret = 0; > > if (!IS_ERR(mmc->supply.vqmmc)) { > @@ -1839,6 +1844,9 @@ static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) > break; > } > > + if (!ret && host->ops && host->ops->volt_switch) > + ret = host->ops->volt_switch(host, ios); > + > if (ret) > dev_warn(mmc_dev(mmc), "Voltage switch failed\n"); > } > diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h > index ddcdfb827996..c04a144259a2 100644 > --- a/drivers/mmc/host/mmci.h > +++ b/drivers/mmc/host/mmci.h > @@ -377,6 +377,8 @@ struct mmci_host_ops { > void (*set_clkreg)(struct mmci_host *host, unsigned int desired); > void (*set_pwrreg)(struct mmci_host *host, unsigned int pwr); > bool (*busy_complete)(struct mmci_host *host, u32 status, u32 err_msk); > + void (*prep_volt_switch)(struct mmci_host *host); > + int (*volt_switch)(struct mmci_host *host, struct mmc_ios *ios); > }; > > struct mmci_host { > -- > 2.17.1 > Kind regards Uffe _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-01-24 13:13 UTC|newest] Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-10 13:48 [PATCH 0/9] mmc: mmci: sdmmc: add sdr104 support Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-10 13:48 ` [PATCH 1/9] mmc: mmci: sdmmc: replace sg_dma_xxx macros Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-10 13:48 ` [PATCH 2/9] mmc: mmci: sdmmc: rename sdmmc_priv struct to sdmmc_idma Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-10 13:48 ` [PATCH 3/9] mmc: mmci: add a reference at mmc_host_ops in mmci struct Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-24 13:09 ` Ulf Hansson 2020-01-24 13:09 ` Ulf Hansson 2020-01-27 10:57 ` Ludovic BARRE 2020-01-27 10:57 ` Ludovic BARRE 2020-01-10 13:48 ` [PATCH 4/9] mmc: mmci: add private pointer for variant Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-10 13:48 ` [PATCH 5/9] dt-bindings: mmc: mmci: add delay block base register for sdmmc Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-15 14:56 ` Rob Herring 2020-01-15 14:56 ` Rob Herring 2020-01-16 9:20 ` Ludovic BARRE 2020-01-16 9:20 ` Ludovic BARRE 2020-01-16 14:33 ` Rob Herring 2020-01-16 14:33 ` Rob Herring 2020-01-16 14:52 ` Ludovic BARRE 2020-01-16 14:52 ` Ludovic BARRE 2020-01-10 13:48 ` [PATCH 6/9] mmc: mmci: sdmmc: add execute tuning with delay block Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-24 13:10 ` Ulf Hansson 2020-01-24 13:10 ` Ulf Hansson 2020-01-27 13:19 ` Ludovic BARRE 2020-01-27 13:19 ` Ludovic BARRE 2020-01-10 13:48 ` [PATCH 7/9] mmc: mmci: add volt_switch callbacks Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-24 13:12 ` Ulf Hansson [this message] 2020-01-24 13:12 ` Ulf Hansson 2020-01-27 13:21 ` Ludovic BARRE 2020-01-27 13:21 ` Ludovic BARRE 2020-01-10 13:48 ` [PATCH 8/9] mmc: mmci: sdmmc: add voltage switch functions Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-24 13:16 ` Ulf Hansson 2020-01-24 13:16 ` Ulf Hansson 2020-01-27 13:50 ` Ludovic BARRE 2020-01-27 13:50 ` Ludovic BARRE 2020-01-10 13:48 ` [PATCH 9/9] mmc: mmci: add sdmmc variant revision 2.0 Ludovic Barre 2020-01-10 13:48 ` Ludovic Barre 2020-01-24 12:55 ` [PATCH 0/9] mmc: mmci: sdmmc: add sdr104 support Ludovic BARRE 2020-01-24 12:55 ` Ludovic BARRE 2020-01-24 13:19 ` Ulf Hansson 2020-01-24 13:19 ` Ulf Hansson 2020-01-27 13:52 ` Ludovic BARRE 2020-01-27 13:52 ` Ludovic BARRE
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