From: peter.chen@freescale.com (Peter Chen)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 08/12] usb: phy-mxs: Add system suspend/resume API
Date: Sat, 12 Oct 2013 17:09:42 +0800 [thread overview]
Message-ID: <1381568986-19802-9-git-send-email-peter.chen@freescale.com> (raw)
In-Reply-To: <1381568986-19802-1-git-send-email-peter.chen@freescale.com>
We need this to keep PHY's power on or off during the system
suspend mode. If we need to enable USB wakeup, then we
must keep PHY's power being on during the system suspend mode.
Otherwise, we need to keep PHY's power being off to save power.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
---
drivers/usb/phy/phy-mxs-usb.c | 47 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index 693f9a4..a91ddc0 100644
--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -57,11 +57,18 @@
#define BM_USBPHY_DEBUG_CLKGATE BIT(30)
/* Anatop Registers */
+#define ANADIG_ANA_MISC0 0x150
+#define ANADIG_ANA_MISC0_SET 0x154
+#define ANADIG_ANA_MISC0_CLR 0x158
+
#define ANADIG_USB1_VBUS_DET_STAT 0x1c0
#define ANADIG_USB1_LOOPBACK_SET 0x1e4
#define ANADIG_USB1_LOOPBACK_CLR 0x1e8
+#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG BIT(12)
+#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL BIT(11)
+
#define BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3)
#define BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 BIT(2)
@@ -192,6 +199,22 @@ static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on)
? "disconnected" : "connected");
}
+static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on)
+{
+ unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR;
+
+ /* Only the SoCs have anatop need below operation */
+ if (!mxs_phy->regmap_anatop)
+ return;
+
+ if (is_mx6q_phy(mxs_phy))
+ regmap_write(mxs_phy->regmap_anatop, reg,
+ BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG);
+ else if (is_mx6sl_phy(mxs_phy))
+ regmap_write(mxs_phy->regmap_anatop,
+ reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL);
+}
+
static int mxs_phy_init(struct usb_phy *phy)
{
struct mxs_phy *mxs_phy = to_mxs_phy(phy);
@@ -413,6 +436,7 @@ static int mxs_phy_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &mxs_phy->phy);
+ device_set_wakeup_capable(&pdev->dev, true);
ret = usb_add_phy_dev(&mxs_phy->phy);
if (ret)
return ret;
@@ -429,6 +453,28 @@ static int mxs_phy_remove(struct platform_device *pdev)
return 0;
}
+static int mxs_phy_system_suspend(struct device *dev)
+{
+ struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ mxs_phy_enable_ldo_in_suspend(mxs_phy, true);
+
+ return 0;
+}
+
+static int mxs_phy_system_resume(struct device *dev)
+{
+ struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ mxs_phy_enable_ldo_in_suspend(mxs_phy, false);
+
+ return 0;
+}
+
+SIMPLE_DEV_PM_OPS(mxs_phy_pm, mxs_phy_system_suspend, mxs_phy_system_resume);
+
static struct platform_driver mxs_phy_driver = {
.probe = mxs_phy_probe,
.remove = mxs_phy_remove,
@@ -436,6 +482,7 @@ static struct platform_driver mxs_phy_driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = mxs_phy_dt_ids,
+ .pm = &mxs_phy_pm,
},
};
--
1.7.1
next prev parent reply other threads:[~2013-10-12 9:09 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-12 9:09 [PATCH 00/12] Add power management support for MXS PHY Peter Chen
2013-10-12 9:09 ` [PATCH 01/12] usb: phy-mxs: Add auto clock and power setting Peter Chen
2013-10-12 9:09 ` [PATCH 02/12] usb: phy-mxs: Enable IC fixes for mx6 SoC serial Peter Chen
2013-10-12 9:38 ` Marek Vasut
2013-10-14 1:31 ` Peter Chen
2013-10-14 2:07 ` Marek Vasut
2013-10-14 1:58 ` Peter Chen
2013-10-14 9:09 ` Shawn Guo
2013-10-14 9:09 ` Peter Chen
2013-10-14 9:29 ` Shawn Guo
2013-10-14 9:16 ` Peter Chen
2013-10-12 9:09 ` [PATCH 03/12] usb: phy-mxs: Add anatop regmap Peter Chen
2013-10-12 9:09 ` [PATCH 04/12] usb: phy: add notify suspend and resume callback Peter Chen
2013-10-12 9:09 ` [PATCH 05/12] usb: phy-mxs: Add implementation of nofity_suspend and notify_resume Peter Chen
2013-10-12 9:42 ` Marek Vasut
2013-10-14 1:36 ` Peter Chen
2013-10-14 2:08 ` Marek Vasut
2013-10-12 9:09 ` [PATCH 06/12] usb: phy: Add set_wakeup API Peter Chen
2013-10-12 9:09 ` [PATCH 07/12] usb: phy-mxs: Add implementation of set_wakeup Peter Chen
2013-10-12 9:44 ` Marek Vasut
2013-10-14 1:41 ` Peter Chen
2013-10-12 9:09 ` Peter Chen [this message]
2013-10-12 9:09 ` [PATCH 09/12] usb: phy-mxs: update binding for adding anatop phandle Peter Chen
2013-10-14 9:22 ` Shawn Guo
2013-10-14 9:10 ` Peter Chen
2013-10-12 9:09 ` [PATCH 10/12] ARM: dts: imx6: add anatop phandle for usbphy Peter Chen
2013-10-12 9:09 ` [PATCH 11/12] usb: phy-mxs: update binding for adding disconnect line property Peter Chen
2013-10-12 9:47 ` Marek Vasut
2013-10-14 1:44 ` Peter Chen
2013-10-12 15:05 ` Thomas Petazzoni
2013-10-14 1:45 ` Peter Chen
2013-10-12 9:09 ` [PATCH 12/12] ARM: dts: imx6: Add disconnect_line_without_vbus property for usbphy Peter Chen
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=1381568986-19802-9-git-send-email-peter.chen@freescale.com \
--to=peter.chen@freescale.com \
--cc=linux-arm-kernel@lists.infradead.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.