From: Dmitry Osipenko <digetx@gmail.com>
To: Aniruddha Rao <anrao@nvidia.com>,
adrian.hunter@intel.com, ulf.hansson@linaro.org,
thierry.reding@gmail.com, jonathanh@nvidia.com,
p.zabel@pengutronix.de
Cc: linux-mmc@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mmc: tegra: Add Runtime PM callbacks
Date: Mon, 27 Jul 2020 16:10:07 +0300 [thread overview]
Message-ID: <ea1a68b6-2399-f7ae-a336-bd1e14793b52@gmail.com> (raw)
In-Reply-To: <1595854036-15434-1-git-send-email-anrao@nvidia.com>
27.07.2020 15:47, Aniruddha Rao пишет:
> Add runtime suspend/resume callbacks to save power
> when the bus is not in use.
> In runtime suspend
> - Turn off the SDMMC host CAR clock.
> - Turn off the trimmer/DLL circuit(BG) power supply(VREG).
> - Turn off the SDMMC host internal clocks.
>
> Re-enable all the disabled clocks/regulators in runtime resume.
>
> Signed-off-by: Aniruddha Rao <anrao@nvidia.com>
> ---
> drivers/mmc/host/sdhci-tegra.c | 149 ++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 140 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index 0a3f9d0..1b4b245 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -23,6 +23,7 @@
> #include <linux/mmc/slot-gpio.h>
> #include <linux/gpio/consumer.h>
> #include <linux/ktime.h>
> +#include <linux/pm_runtime.h>
>
> #include "sdhci-pltfm.h"
> #include "cqhci.h"
> @@ -36,6 +37,7 @@
> #define SDHCI_CLOCK_CTRL_SDR50_TUNING_OVERRIDE BIT(5)
> #define SDHCI_CLOCK_CTRL_PADPIPE_CLKEN_OVERRIDE BIT(3)
> #define SDHCI_CLOCK_CTRL_SPI_MODE_CLKEN_OVERRIDE BIT(2)
> +#define SDHCI_CLOCK_CTRL_SDMMC_CLK BIT(0)
>
> #define SDHCI_TEGRA_VENDOR_SYS_SW_CTRL 0x104
> #define SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE BIT(31)
> @@ -51,6 +53,9 @@
> #define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20
> #define SDHCI_MISC_CTRL_ENABLE_DDR50 0x200
>
> +#define SDHCI_TEGRA_VENDOR_IO_TRIM_CTRL_0 0x1AC
> +#define SDHCI_TEGRA_IO_TRIM_CTRL_0_SEL_VREG_MASK 0x4
Hello Aniruddha,
Does this register exist on older Tegra SoCs?
next prev parent reply other threads:[~2020-07-27 13:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-27 12:47 [PATCH] mmc: tegra: Add Runtime PM callbacks Aniruddha Rao
2020-07-27 13:10 ` Dmitry Osipenko [this message]
2020-07-28 14:12 ` Jon Hunter
2020-08-24 7:20 ` Ulf Hansson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ea1a68b6-2399-f7ae-a336-bd1e14793b52@gmail.com \
--to=digetx@gmail.com \
--cc=adrian.hunter@intel.com \
--cc=anrao@nvidia.com \
--cc=jonathanh@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mmc@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=p.zabel@pengutronix.de \
--cc=thierry.reding@gmail.com \
--cc=ulf.hansson@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).