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Subject[PATCH v12 2/7] usb: phy: omap-usb2: use the new generic PHY framework
Date
Used the generic PHY framework API to create the PHY. Now the power off and
power on are done in omap_usb_power_off and omap_usb_power_on respectively.
The omap-usb2 driver is also moved to driver/phy.

However using the old USB PHY library cannot be completely removed
because OTG is intertwined with PHY and moving to the new framework
will break OTG. Once we have a separate OTG state machine, we
can get rid of the USB PHY library.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>
---
drivers/phy/Kconfig | 12 +++++++++
drivers/phy/Makefile | 1 +
drivers/{usb => }/phy/phy-omap-usb2.c | 45 ++++++++++++++++++++++++++++++---
drivers/usb/phy/Kconfig | 11 --------
drivers/usb/phy/Makefile | 1 -
5 files changed, 54 insertions(+), 16 deletions(-)
rename drivers/{usb => }/phy/phy-omap-usb2.c (88%)

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 349bef2..38c3477 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -15,4 +15,16 @@ config GENERIC_PHY
phy users can obtain reference to the PHY. All the users of this
framework should select this config.

+config OMAP_USB2
+ tristate "OMAP USB2 PHY Driver"
+ depends on ARCH_OMAP2PLUS
+ select GENERIC_PHY
+ select USB_PHY
+ select OMAP_CONTROL_USB
+ help
+ Enable this to support the transceiver that is part of SOC. This
+ driver takes care of all the PHY functionality apart from comparator.
+ The USB OTG controller communicates with the comparator using this
+ driver.
+
endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 9e9560f..ed5b088 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -3,3 +3,4 @@
#

obj-$(CONFIG_GENERIC_PHY) += phy-core.o
+obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
diff --git a/drivers/usb/phy/phy-omap-usb2.c b/drivers/phy/phy-omap-usb2.c
similarity index 88%
rename from drivers/usb/phy/phy-omap-usb2.c
rename to drivers/phy/phy-omap-usb2.c
index d266861..4d7b4e5 100644
--- a/drivers/usb/phy/phy-omap-usb2.c
+++ b/drivers/phy/phy-omap-usb2.c
@@ -28,6 +28,7 @@
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/usb/omap_control_usb.h>
+#include <linux/phy/phy.h>

/**
* omap_usb2_set_comparator - links the comparator present in the sytem with
@@ -118,10 +119,36 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend)
return 0;
}

+static int omap_usb_power_off(struct phy *x)
+{
+ struct omap_usb *phy = phy_get_drvdata(x);
+
+ omap_control_usb_phy_power(phy->control_dev, 0);
+
+ return 0;
+}
+
+static int omap_usb_power_on(struct phy *x)
+{
+ struct omap_usb *phy = phy_get_drvdata(x);
+
+ omap_control_usb_phy_power(phy->control_dev, 1);
+
+ return 0;
+}
+
+static struct phy_ops ops = {
+ .power_on = omap_usb_power_on,
+ .power_off = omap_usb_power_off,
+ .owner = THIS_MODULE,
+};
+
static int omap_usb2_probe(struct platform_device *pdev)
{
struct omap_usb *phy;
+ struct phy *generic_phy;
struct usb_otg *otg;
+ struct phy_provider *phy_provider;

phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
if (!phy) {
@@ -143,6 +170,11 @@ static int omap_usb2_probe(struct platform_device *pdev)
phy->phy.otg = otg;
phy->phy.type = USB_PHY_TYPE_USB2;

+ phy_provider = devm_of_phy_provider_register(phy->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
phy->control_dev = omap_get_control_dev();
if (IS_ERR(phy->control_dev)) {
dev_dbg(&pdev->dev, "Failed to get control device\n");
@@ -158,6 +190,15 @@ static int omap_usb2_probe(struct platform_device *pdev)
otg->start_srp = omap_usb_start_srp;
otg->phy = &phy->phy;

+ platform_set_drvdata(pdev, phy);
+ pm_runtime_enable(phy->dev);
+
+ generic_phy = devm_phy_create(phy->dev, &ops, NULL);
+ if (IS_ERR(generic_phy))
+ return PTR_ERR(generic_phy);
+
+ phy_set_drvdata(generic_phy, phy);
+
phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
if (IS_ERR(phy->wkupclk)) {
dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
@@ -173,10 +214,6 @@ static int omap_usb2_probe(struct platform_device *pdev)

usb_add_phy_dev(&phy->phy);

- platform_set_drvdata(pdev, phy);
-
- pm_runtime_enable(phy->dev);
-
return 0;
}

diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index d5589f9..508e915 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -66,17 +66,6 @@ config OMAP_CONTROL_USB
power on the USB2 PHY is present in OMAP4 and OMAP5. OMAP5 has an
additional register to power on USB3 PHY.

-config OMAP_USB2
- tristate "OMAP USB2 PHY Driver"
- depends on ARCH_OMAP2PLUS
- select OMAP_CONTROL_USB
- select USB_PHY
- help
- Enable this to support the transceiver that is part of SOC. This
- driver takes care of all the PHY functionality apart from comparator.
- The USB OTG controller communicates with the comparator using this
- driver.
-
config OMAP_USB3
tristate "OMAP USB3 PHY Driver"
depends on ARCH_OMAP2PLUS || COMPILE_TEST
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index 2135e85..fa4db0e 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -15,7 +15,6 @@ obj-$(CONFIG_NOP_USB_XCEIV) += phy-generic.o
obj-$(CONFIG_OMAP_CONTROL_USB) += phy-omap-control.o
obj-$(CONFIG_AM335X_CONTROL_USB) += phy-am335x-control.o
obj-$(CONFIG_AM335X_PHY_USB) += phy-am335x.o
-obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
obj-$(CONFIG_OMAP_USB3) += phy-omap-usb3.o
obj-$(CONFIG_SAMSUNG_USBPHY) += phy-samsung-usb.o
obj-$(CONFIG_SAMSUNG_USB2PHY) += phy-samsung-usb2.o
--
1.7.10.4


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