power: qpnp-charger: add OCP support for SMBBP/SMBCL
Add over current protection support for the USB
peripheral of SMBBP and SMBCL devices.
The OCP interrupt is used to notify and clear
of over current conditions when reverse boosting for
USB OTG. In an over current condition the hardware
opens the OTG FET but leaves the boost on. The
interrupt handler clears the OCP LATCH and turns
back on the OTG switch.
Change-Id: I329887a6dcde2d9f96aca4fab310783327e024d9
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/power/qpnp-charger.txt b/Documentation/devicetree/bindings/power/qpnp-charger.txt
index e3c3555..ce105c0 100644
--- a/Documentation/devicetree/bindings/power/qpnp-charger.txt
+++ b/Documentation/devicetree/bindings/power/qpnp-charger.txt
@@ -102,6 +102,7 @@
qcom,usb-chgpth:
- usbin-valid
+ - usb-ocp (only for SMBBP and SMBCL)
qcom,chgr:
- chg-done
@@ -148,6 +149,9 @@
- coarse-det-usb: Coarse detect interrupt triggers
at low voltage on USB_IN.
- chg-gone: Triggers on VCHG line.
+ - usb-ocp Triggers on over current conditions when
+ reverse boosting. (Only available on
+ SMBCL and SMBBP devices).
qcom,dc-chgpth:
- dcin-valid: Indicates a valid DC charger
diff --git a/arch/arm/boot/dts/msm-pm8110.dtsi b/arch/arm/boot/dts/msm-pm8110.dtsi
index 4f3e461..ce03011 100644
--- a/arch/arm/boot/dts/msm-pm8110.dtsi
+++ b/arch/arm/boot/dts/msm-pm8110.dtsi
@@ -132,11 +132,13 @@
reg = <0x1300 0x100>;
interrupts = <0 0x13 0x0>,
<0 0x13 0x1>,
- <0x0 0x13 0x2>;
+ <0x0 0x13 0x2>,
+ <0x0 0x13 0x3>;
interrupt-names = "coarse-det-usb",
"usbin-valid",
- "chg-gone";
+ "chg-gone",
+ "usb-ocp";
};
qcom,chg-misc@1600 {
diff --git a/arch/arm/boot/dts/msm-pm8226.dtsi b/arch/arm/boot/dts/msm-pm8226.dtsi
index d7c2155..49cc255 100644
--- a/arch/arm/boot/dts/msm-pm8226.dtsi
+++ b/arch/arm/boot/dts/msm-pm8226.dtsi
@@ -148,11 +148,13 @@
reg = <0x1300 0x100>;
interrupts = <0 0x13 0x0>,
<0 0x13 0x1>,
- <0x0 0x13 0x2>;
+ <0x0 0x13 0x2>,
+ <0x0 0x13 0x3>;
interrupt-names = "coarse-det-usb",
"usbin-valid",
- "chg-gone";
+ "chg-gone",
+ "usb-ocp";
};
pm8226_chg_boost: qcom,boost@1500 {
diff --git a/drivers/power/qpnp-charger.c b/drivers/power/qpnp-charger.c
index 950b88a..92c4503 100644
--- a/drivers/power/qpnp-charger.c
+++ b/drivers/power/qpnp-charger.c
@@ -100,6 +100,8 @@
#define BOOST_ENABLE_CONTROL 0x46
#define COMP_OVR1 0xEA
#define BAT_IF_BTC_CTRL 0x49
+#define USB_OCP_THR 0x52
+#define USB_OCP_CLR 0x53
#define REG_OFFSET_PERP_SUBTYPE 0x05
@@ -142,6 +144,11 @@
#define BAT_THM_EN BIT(1)
#define BAT_ID_EN BIT(0)
#define BOOST_PWR_EN BIT(7)
+#define OCP_CLR_BIT BIT(7)
+#define OCP_THR_MASK 0x03
+#define OCP_THR_900_MA 0x02
+#define OCP_THR_500_MA 0x01
+#define OCP_THR_200_MA 0x00
/* Interrupt definitions */
/* smbb_chg_interrupts */
@@ -267,6 +274,7 @@
u16 misc_base;
u16 freq_base;
struct qpnp_chg_irq usbin_valid;
+ struct qpnp_chg_irq usb_ocp;
struct qpnp_chg_irq dcin_valid;
struct qpnp_chg_irq chg_gone;
struct qpnp_chg_irq chg_fastchg;
@@ -981,6 +989,32 @@
return IRQ_HANDLED;
}
+static irqreturn_t
+qpnp_chg_usb_usb_ocp_irq_handler(int irq, void *_chip)
+{
+ struct qpnp_chg_chip *chip = _chip;
+ int rc;
+
+ pr_debug("usb-ocp triggered\n");
+
+ rc = qpnp_chg_masked_write(chip,
+ chip->usb_chgpth_base + USB_OCP_CLR,
+ OCP_CLR_BIT,
+ OCP_CLR_BIT, 1);
+ if (rc)
+ pr_err("Failed to clear OCP bit rc = %d\n", rc);
+
+ /* force usb ovp fet off */
+ rc = qpnp_chg_masked_write(chip,
+ chip->usb_chgpth_base + CHGR_USB_USB_OTG_CTL,
+ USB_OTG_EN_BIT,
+ USB_OTG_EN_BIT, 1);
+ if (rc)
+ pr_err("Failed to turn off usb ovp rc = %d\n", rc);
+
+ return IRQ_HANDLED;
+}
+
#define ENUM_T_STOP_BIT BIT(0)
static irqreturn_t
qpnp_chg_usb_usbin_valid_irq_handler(int irq, void *_chip)
@@ -2631,6 +2665,27 @@
return rc;
}
+ if ((subtype == SMBBP_USB_CHGPTH_SUBTYPE) ||
+ (subtype == SMBCL_USB_CHGPTH_SUBTYPE)) {
+ chip->usb_ocp.irq = spmi_get_irq_byname(spmi,
+ spmi_resource, "usb-ocp");
+ if (chip->usb_ocp.irq < 0) {
+ pr_err("Unable to get usbin irq\n");
+ return rc;
+ }
+ rc = devm_request_irq(chip->dev,
+ chip->usb_ocp.irq,
+ qpnp_chg_usb_usb_ocp_irq_handler,
+ IRQF_TRIGGER_RISING, "usb-ocp", chip);
+ if (rc < 0) {
+ pr_err("Can't request %d usb-ocp: %d\n",
+ chip->usb_ocp.irq, rc);
+ return rc;
+ }
+
+ enable_irq_wake(chip->usb_ocp.irq);
+ }
+
enable_irq_wake(chip->usbin_valid.irq);
enable_irq_wake(chip->chg_gone.irq);
break;
@@ -2882,6 +2937,16 @@
0xFF,
0x80, 1);
+ if ((subtype == SMBBP_USB_CHGPTH_SUBTYPE) ||
+ (subtype == SMBCL_USB_CHGPTH_SUBTYPE)) {
+ rc = qpnp_chg_masked_write(chip,
+ chip->usb_chgpth_base + USB_OCP_THR,
+ OCP_THR_MASK,
+ OCP_THR_900_MA, 1);
+ if (rc)
+ pr_err("Failed to configure OCP rc = %d\n", rc);
+ }
+
break;
case SMBB_DC_CHGPTH_SUBTYPE:
break;