Author: loos
Date: Wed May 13 01:10:28 2015
New Revision: 282827
URL: https://svnweb.freebsd.org/changeset/base/282827
Log:
Add support for the power button on BeagleBone Black.
Shutdown and turn off the board when the power button is pressed.
Submitted by: Michal Meloun <mel...@miracle.cz>
Relnotes: yes
Modified:
head/sys/arm/ti/am335x/am335x_pmic.c
head/sys/boot/fdt/dts/arm/beaglebone-black.dts
Modified: head/sys/arm/ti/am335x/am335x_pmic.c
==============================================================================
--- head/sys/arm/ti/am335x/am335x_pmic.c Wed May 13 00:28:36 2015
(r282826)
+++ head/sys/arm/ti/am335x/am335x_pmic.c Wed May 13 01:10:28 2015
(r282827)
@@ -37,6 +37,7 @@ __FBSDID("$FreeBSD$");
#include <sys/clock.h>
#include <sys/time.h>
#include <sys/bus.h>
+#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/resource.h>
#include <sys/rman.h>
@@ -58,12 +59,20 @@ __FBSDID("$FreeBSD$");
#define TPS65217D 0x6
/* TPS65217 Reisters */
-#define TPS65217_CHIPID_REG 0x00
-#define TPS65217_STATUS_REG 0x0A
-#define TPS65217_STATUS_OFF (1U << 7)
-#define TPS65217_STATUS_ACPWR (1U << 3)
-#define TPS65217_STATUS_USBPWR (1U << 2)
-#define TPS65217_STATUS_BT (1U << 0)
+#define TPS65217_CHIPID_REG 0x00
+#define TPS65217_INT_REG 0x02
+#define TPS65217_INT_PBM (1U << 6)
+#define TPS65217_INT_ACM (1U << 5)
+#define TPS65217_INT_USBM (1U << 4)
+#define TPS65217_INT_PBI (1U << 2)
+#define TPS65217_INT_ACI (1U << 1)
+#define TPS65217_INT_USBI (1U << 0)
+
+#define TPS65217_STATUS_REG 0x0A
+#define TPS65217_STATUS_OFF (1U << 7)
+#define TPS65217_STATUS_ACPWR (1U << 3)
+#define TPS65217_STATUS_USBPWR (1U << 2)
+#define TPS65217_STATUS_BT (1U << 0)
#define MAX_IIC_DATA_SIZE 2
@@ -72,6 +81,8 @@ struct am335x_pmic_softc {
device_t sc_dev;
uint32_t sc_addr;
struct intr_config_hook enum_hook;
+ struct resource *sc_irq_res;
+ void *sc_intrhand;
};
static void am335x_pmic_shutdown(void *, int);
@@ -105,6 +116,38 @@ am335x_pmic_write(device_t dev, uint8_t
return (iicbus_transfer(dev, msg, 1));
}
+static void
+am335x_pmic_intr(void *arg)
+{
+ struct am335x_pmic_softc *sc = (struct am335x_pmic_softc *)arg;
+ uint8_t int_reg, status_reg;
+ int rv;
+ char notify_buf[16];
+
+ THREAD_SLEEPING_OK();
+ rv = am335x_pmic_read(sc->sc_dev, TPS65217_INT_REG, &int_reg, 1);
+ if (rv != 0) {
+ device_printf(sc->sc_dev, "Cannot read interrupt register\n");
+ THREAD_NO_SLEEPING();
+ return;
+ }
+ rv = am335x_pmic_read(sc->sc_dev, TPS65217_STATUS_REG, &status_reg, 1);
+ if (rv != 0) {
+ device_printf(sc->sc_dev, "Cannot read status register\n");
+ THREAD_NO_SLEEPING();
+ return;
+ }
+ THREAD_NO_SLEEPING();
+
+ if ((int_reg & TPS65217_INT_PBI) && (status_reg & TPS65217_STATUS_BT))
+ shutdown_nice(RB_POWEROFF);
+ if (int_reg & TPS65217_INT_ACI) {
+ snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x",
+ (status_reg & TPS65217_STATUS_ACPWR) ? 1 : 0);
+ devctl_notify_f("ACPI", "ACAD", "power", notify_buf, M_NOWAIT);
+ }
+}
+
static int
am335x_pmic_probe(device_t dev)
{
@@ -130,6 +173,7 @@ am335x_pmic_start(void *xdev)
uint8_t reg;
char name[20];
char pwr[4][11] = {"Unknown", "USB", "AC", "USB and AC"};
+ int rv;
sc = device_get_softc(dev);
@@ -158,15 +202,38 @@ am335x_pmic_start(void *xdev)
SHUTDOWN_PRI_LAST);
config_intrhook_disestablish(&sc->enum_hook);
+
+ /* Unmask all interrupts and clear pending status */
+ reg = 0;
+ am335x_pmic_write(dev, TPS65217_INT_REG, ®, 1);
+ am335x_pmic_read(dev, TPS65217_INT_REG, ®, 1);
+
+ if (sc->sc_irq_res != NULL) {
+ rv = bus_setup_intr(dev, sc->sc_irq_res,
+ INTR_TYPE_MISC | INTR_MPSAFE, NULL, am335x_pmic_intr,
+ sc, &sc->sc_intrhand);
+ if (rv != 0)
+ device_printf(dev,
+ "Unable to setup the irq handler.\n");
+ }
}
static int
am335x_pmic_attach(device_t dev)
{
struct am335x_pmic_softc *sc;
+ int rid;
sc = device_get_softc(dev);
+ rid = 0;
+ sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
+ RF_ACTIVE);
+ if (!sc->sc_irq_res) {
+ device_printf(dev, "cannot allocate interrupt\n");
+ /* return (ENXIO); */
+ }
+
sc->enum_hook.ich_func = am335x_pmic_start;
sc->enum_hook.ich_arg = dev;
Modified: head/sys/boot/fdt/dts/arm/beaglebone-black.dts
==============================================================================
--- head/sys/boot/fdt/dts/arm/beaglebone-black.dts Wed May 13 00:28:36
2015 (r282826)
+++ head/sys/boot/fdt/dts/arm/beaglebone-black.dts Wed May 13 01:10:28
2015 (r282827)
@@ -149,6 +149,8 @@
pmic@48 {
compatible = "ti,am335x-pmic";
reg = <0x48>;
+ interrupts = <7>; /* nNMI */
+ interrupt-parent = <&AINTC>;
};
};
};
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