usb: phy: ab8500-usb: add flag bits to control driver features

Introduce a "flags" field in "struct ab8500_usb" to allow controlling
driver features and quirks depending on ab8500 chip variant and
revision.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 73 insertions, 36 deletions

diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index bbc46197dce0..54dd2b16c80b 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -121,6 +121,17 @@ enum ab8500_usb_mode {
         USB_DEDICATED_CHG
 };
 
+/* Register USB_LINK_STATUS interrupt */
+#define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ     (1 << 0)
+/* Register ID_WAKEUP_F interrupt */
+#define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ       (1 << 1)
+/* Register VBUS_DET_F interrupt */
+#define AB8500_USB_FLAG_USE_VBUS_DET_IRQ        (1 << 2)
+/* Driver is using the ab-iddet driver*/
+#define AB8500_USB_FLAG_USE_AB_IDDET            (1 << 3)
+/* Enable setting regulators voltage */
+#define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE   (1 << 4)
+
 struct ab8500_usb {
         struct usb_phy phy;
         struct device *dev;
@@ -136,6 +147,7 @@ struct ab8500_usb {
         int previous_link_status_state;
         struct pinctrl *pinctrl;
         struct pinctrl_state *pins_sleep;
+        unsigned int flags;
 };
 
 static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
@@ -174,7 +186,7 @@ static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
         if (ret)
                 dev_err(ab->dev, "Failed to enable v-ape\n");
 
-        if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
+        if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
                 ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi);
                 if (ab->saved_v_ulpi < 0)
                         dev_err(ab->dev, "Failed to get v_ulpi voltage\n");
@@ -194,7 +206,7 @@ static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
         if (ret)
                 dev_err(ab->dev, "Failed to enable vddulpivio18\n");
 
-        if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
+        if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
                 volt = regulator_get_voltage(ab->v_ulpi);
                 if ((volt != 1300000) && (volt != 1350000))
                         dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n",
@@ -215,7 +227,7 @@ static void ab8500_usb_regulator_disable(struct ab8500_usb *ab)
         regulator_disable(ab->v_ulpi);
 
         /* USB is not the only consumer of Vintcore, restore old settings */
-        if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
+        if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
                 if (ab->saved_v_ulpi > 0) {
                         ret = regulator_set_voltage(ab->v_ulpi,
                                         ab->saved_v_ulpi, ab->saved_v_ulpi);
@@ -729,43 +741,52 @@ static int ab8500_usb_irq_setup(struct platform_device *pdev,
         int err;
         int irq;
 
-        irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
-        if (irq < 0) {
-                dev_err(&pdev->dev, "Link status irq not found\n");
-                return irq;
-        }
-        err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
-                        ab8500_usb_link_status_irq,
-                        IRQF_NO_SUSPEND | IRQF_SHARED, "usb-link-status", ab);
-        if (err < 0) {
-                dev_err(ab->dev, "request_irq failed for link status irq\n");
-                return err;
+        if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) {
+                irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
+                if (irq < 0) {
+                        dev_err(&pdev->dev, "Link status irq not found\n");
+                        return irq;
+                }
+                err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+                                ab8500_usb_link_status_irq,
+                                IRQF_NO_SUSPEND | IRQF_SHARED,
+                                "usb-link-status", ab);
+                if (err < 0) {
+                        dev_err(ab->dev, "request_irq failed for link status irq\n");
+                        return err;
+                }
         }
 
-        irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
-        if (irq < 0) {
-                dev_err(&pdev->dev, "ID fall irq not found\n");
-                return irq;
-        }
-        err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
-                        ab8500_usb_disconnect_irq,
-                        IRQF_NO_SUSPEND | IRQF_SHARED, "usb-id-fall", ab);
-        if (err < 0) {
-                dev_err(ab->dev, "request_irq failed for ID fall irq\n");
-                return err;
+        if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) {
+                irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
+                if (irq < 0) {
+                        dev_err(&pdev->dev, "ID fall irq not found\n");
+                        return irq;
+                }
+                err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+                                ab8500_usb_disconnect_irq,
+                                IRQF_NO_SUSPEND | IRQF_SHARED,
+                                "usb-id-fall", ab);
+                if (err < 0) {
+                        dev_err(ab->dev, "request_irq failed for ID fall irq\n");
+                        return err;
+                }
         }
 
-        irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
-        if (irq < 0) {
-                dev_err(&pdev->dev, "VBUS fall irq not found\n");
-                return irq;
-        }
-        err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
-                        ab8500_usb_disconnect_irq,
-                        IRQF_NO_SUSPEND | IRQF_SHARED, "usb-vbus-fall", ab);
-        if (err < 0) {
-                dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
-                return err;
+        if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) {
+                irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
+                if (irq < 0) {
+                        dev_err(&pdev->dev, "VBUS fall irq not found\n");
+                        return irq;
+                }
+                err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+                                ab8500_usb_disconnect_irq,
+                                IRQF_NO_SUSPEND | IRQF_SHARED,
+                                "usb-vbus-fall", ab);
+                if (err < 0) {
+                        dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
+                        return err;
+                }
         }
 
         return 0;
@@ -888,6 +909,22 @@ static int ab8500_usb_probe(struct platform_device *pdev)
         otg->set_host           = ab8500_usb_set_host;
         otg->set_peripheral     = ab8500_usb_set_peripheral;
 
+        if (is_ab8500(ab->ab8500)) {
+                ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
+                        AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
+                        AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
+                        AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
+        } else if (is_ab8505(ab->ab8500)) {
+                ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
+                        AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
+                        AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
+                        AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
+        }
+
+        /* Disable regulator voltage setting for AB8500 <= v2.0 */
+        if (is_ab8500_2p0_or_earlier(ab->ab8500))
+                ab->flags &= ~AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
+
         platform_set_drvdata(pdev, ab);
 
         ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier);