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[src/trunk]: src/sys/dev/i2c Add battery sensors.
details: https://anonhg.NetBSD.org/src/rev/d792028f5933
branches: trunk
changeset: 322509:d792028f5933
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Sat May 05 00:39:59 2018 +0000
description:
Add battery sensors.
diffstat:
sys/dev/i2c/axppmic.c | 194 ++++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 173 insertions(+), 21 deletions(-)
diffs (288 lines):
diff -r 396735337b14 -r d792028f5933 sys/dev/i2c/axppmic.c
--- a/sys/dev/i2c/axppmic.c Sat May 05 00:14:28 2018 +0000
+++ b/sys/dev/i2c/axppmic.c Sat May 05 00:39:59 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: axppmic.c,v 1.1 2018/05/04 21:09:55 jmcneill Exp $ */
+/* $NetBSD: axppmic.c,v 1.2 2018/05/05 00:39:59 jmcneill Exp $ */
/*-
* Copyright (c) 2014-2018 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: axppmic.c,v 1.1 2018/05/04 21:09:55 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: axppmic.c,v 1.2 2018/05/05 00:39:59 jmcneill Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -44,6 +44,11 @@
#include <dev/fdt/fdtvar.h>
+#define AXP_POWER_MODE_REG 0x01
+#define AXP_POWER_MODE_BATT_VALID __BIT(4)
+#define AXP_POWER_MODE_BATT_PRESENT __BIT(5)
+#define AXP_POWER_MODE_BATT_CHARGING __BIT(6)
+
#define AXP_POWER_DISABLE_REG 0x32
#define AXP_POWER_DISABLE_CTRL __BIT(7)
@@ -51,6 +56,16 @@
#define AXP_IRQ2_POKSIRQ __BIT(1)
#define AXP_IRQ_STATUS_REG(n) (0x48 + (n) - 1)
+#define AXP_FUEL_GAUGE_CTRL_REG 0xb8
+#define AXP_FUEL_GAUGE_CTRL_EN __BIT(7)
+#define AXP_BATT_CAP_REG 0xb9
+#define AXP_BATT_CAP_VALID __BIT(7)
+#define AXP_BATT_CAP_PERCENT __BITS(6,0)
+
+#define AXP_BATT_CAP_WARN_REG 0xe6
+#define AXP_BATT_CAP_WARN_LV1 __BITS(7,4)
+#define AXP_BATT_CAP_WARN_LV2 __BITS(3,0)
+
struct axppmic_ctrl {
device_t c_dev;
@@ -160,6 +175,16 @@
const struct axppmic_ctrl *controls;
u_int ncontrols;
u_int irq_regs;
+ bool has_battery;
+ bool has_fuel_gauge;
+};
+
+enum axppmic_sensor {
+ AXP_SENSOR_BATT_PRESENT,
+ AXP_SENSOR_BATT_CHARGING,
+ AXP_SENSOR_BATT_CHARGE_STATE,
+ AXP_SENSOR_BATT_CAPACITY,
+ AXP_NSENSORS
};
struct axppmic_softc {
@@ -168,9 +193,13 @@
i2c_addr_t sc_addr;
int sc_phandle;
+ bool sc_has_battery;
+ bool sc_has_fuel_gauge;
+
struct sysmon_pswitch sc_smpsw;
- u_int sc_nirq;
+ struct sysmon_envsys *sc_sme;
+ envsys_data_t sc_sensor[AXP_NSENSORS];
};
struct axpreg_softc {
@@ -178,8 +207,6 @@
i2c_tag_t sc_i2c;
i2c_addr_t sc_addr;
const struct axppmic_ctrl *sc_ctrl;
-
- u_int sc_nirq;
};
struct axpreg_attach_args {
@@ -194,6 +221,8 @@
.controls = axp803_ctrls,
.ncontrols = __arraycount(axp803_ctrls),
.irq_regs = 6,
+ .has_battery = true,
+ .has_fuel_gauge = true,
};
static const struct axppmic_config axp805_config = {
@@ -322,7 +351,7 @@
uint8_t stat;
iic_acquire_bus(sc->sc_i2c, flags);
- if (sc->sc_nirq >= 2 && axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_IRQ_STATUS_REG(2), &stat, flags) == 0) {
+ if (axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_IRQ_STATUS_REG(2), &stat, flags) == 0) {
if (stat & AXP_IRQ2_POKSIRQ)
sysmon_task_queue_sched(0, axppmic_task_shut, sc);
@@ -333,6 +362,126 @@
return 1;
}
+static void
+axppmic_sensor_refresh(struct sysmon_envsys *sme, envsys_data_t *e)
+{
+ struct axppmic_softc *sc = sme->sme_cookie;
+ const int flags = I2C_F_POLL;
+ uint8_t val, warn_val;
+
+ e->state = ENVSYS_SINVALID;
+
+ iic_acquire_bus(sc->sc_i2c, flags);
+ switch (e->private) {
+ case AXP_SENSOR_BATT_PRESENT:
+ if (axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_POWER_MODE_REG, &val, flags) == 0) {
+ if (val & AXP_POWER_MODE_BATT_VALID) {
+ e->state = ENVSYS_SVALID;
+ e->value_cur = !!(val & AXP_POWER_MODE_BATT_PRESENT);
+ break;
+ }
+ }
+ break;
+ case AXP_SENSOR_BATT_CHARGING:
+ if (axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_POWER_MODE_REG, &val, flags) == 0) {
+ e->state = ENVSYS_SVALID;
+ e->value_cur = !!(val & AXP_POWER_MODE_BATT_CHARGING);
+ }
+ break;
+ case AXP_SENSOR_BATT_CHARGE_STATE:
+ if (axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_POWER_MODE_REG, &val, flags) == 0 &&
+ (val & AXP_POWER_MODE_BATT_VALID) != 0 &&
+ (val & AXP_POWER_MODE_BATT_PRESENT) != 0 &&
+ axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_BATT_CAP_REG, &val, flags) == 0 &&
+ (val & AXP_BATT_CAP_VALID) != 0 &&
+ axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_BATT_CAP_WARN_REG, &warn_val, flags) == 0) {
+ const u_int warn_thres = __SHIFTOUT(warn_val, AXP_BATT_CAP_WARN_LV1) + 5;
+ const u_int shut_thres = __SHIFTOUT(warn_val, AXP_BATT_CAP_WARN_LV2);
+
+ const u_int batt_val = __SHIFTOUT(val, AXP_BATT_CAP_PERCENT);
+ if (batt_val <= shut_thres) {
+ e->state = ENVSYS_SCRITICAL;
+ e->value_cur = ENVSYS_BATTERY_CAPACITY_CRITICAL;
+ } else if (batt_val <= warn_thres) {
+ e->state = ENVSYS_SWARNUNDER;
+ e->value_cur = ENVSYS_BATTERY_CAPACITY_WARNING;
+ } else {
+ e->state = ENVSYS_SVALID;
+ e->value_cur = ENVSYS_BATTERY_CAPACITY_NORMAL;
+ }
+ }
+ break;
+ case AXP_SENSOR_BATT_CAPACITY:
+ if (axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_POWER_MODE_REG, &val, flags) == 0 &&
+ (val & AXP_POWER_MODE_BATT_VALID) != 0 &&
+ (val & AXP_POWER_MODE_BATT_PRESENT) != 0 &&
+ axppmic_read(sc->sc_i2c, sc->sc_addr, AXP_BATT_CAP_REG, &val, flags) == 0 &&
+ (val & AXP_BATT_CAP_VALID) != 0) {
+ e->state = ENVSYS_SVALID;
+ e->value_cur = __SHIFTOUT(val, AXP_BATT_CAP_PERCENT);
+ }
+ break;
+ }
+ iic_release_bus(sc->sc_i2c, flags);
+}
+
+static void
+axppmic_attach_battery(struct axppmic_softc *sc)
+{
+ envsys_data_t *e;
+
+ e = &sc->sc_sensor[AXP_SENSOR_BATT_PRESENT];
+ e->private = AXP_SENSOR_BATT_PRESENT;
+ e->units = ENVSYS_INDICATOR;
+ e->state = ENVSYS_SINVALID;
+ strlcpy(e->desc, "battery present", sizeof(e->desc));
+ sysmon_envsys_sensor_attach(sc->sc_sme, e);
+
+ e = &sc->sc_sensor[AXP_SENSOR_BATT_CHARGING];
+ e->private = AXP_SENSOR_BATT_CHARGING;
+ e->units = ENVSYS_BATTERY_CHARGE;
+ e->state = ENVSYS_SINVALID;
+ strlcpy(e->desc, "charging", sizeof(e->desc));
+ sysmon_envsys_sensor_attach(sc->sc_sme, e);
+
+ e = &sc->sc_sensor[AXP_SENSOR_BATT_CHARGE_STATE];
+ e->private = AXP_SENSOR_BATT_CHARGE_STATE;
+ e->units = ENVSYS_BATTERY_CAPACITY;
+ e->flags = ENVSYS_FMONSTCHANGED;
+ e->state = ENVSYS_SVALID;
+ e->value_cur = ENVSYS_BATTERY_CAPACITY_NORMAL;
+ strlcpy(e->desc, "charge state", sizeof(e->desc));
+ sysmon_envsys_sensor_attach(sc->sc_sme, e);
+
+ if (sc->sc_has_fuel_gauge) {
+ e = &sc->sc_sensor[AXP_SENSOR_BATT_CAPACITY];
+ e->private = AXP_SENSOR_BATT_CAPACITY;
+ e->units = ENVSYS_INTEGER;
+ e->state = ENVSYS_SINVALID;
+ e->flags = ENVSYS_FPERCENT;
+ strlcpy(e->desc, "battery percent", sizeof(e->desc));
+ sysmon_envsys_sensor_attach(sc->sc_sme, e);
+ }
+}
+
+static void
+axppmic_attach_sensors(struct axppmic_softc *sc)
+{
+ if (sc->sc_has_battery) {
+ sc->sc_sme = sysmon_envsys_create();
+ sc->sc_sme->sme_name = device_xname(sc->sc_dev);
+ sc->sc_sme->sme_cookie = sc;
+ sc->sc_sme->sme_refresh = axppmic_sensor_refresh;
+ sc->sc_sme->sme_class = SME_CLASS_BATTERY;
+ sc->sc_sme->sme_flags = SME_POLL_ONLY | SME_INIT_REFRESH;
+
+ axppmic_attach_battery(sc);
+
+ sysmon_envsys_register(sc->sc_sme);
+ }
+}
+
+
static int
axppmic_match(device_t parent, cfdata_t match, void *aux)
{
@@ -365,7 +514,8 @@
sc->sc_i2c = ia->ia_tag;
sc->sc_addr = ia->ia_addr;
sc->sc_phandle = ia->ia_cookie;
- sc->sc_nirq = c->irq_regs;
+ sc->sc_has_battery = c->has_battery;
+ sc->sc_has_fuel_gauge = c->has_fuel_gauge;
aprint_naive("\n");
aprint_normal(": %s\n", c->name);
@@ -375,7 +525,7 @@
sysmon_pswitch_register(&sc->sc_smpsw);
iic_acquire_bus(sc->sc_i2c, I2C_F_POLL);
- for (i = 1; i <= sc->sc_nirq; i++) {
+ for (i = 1; i <= c->irq_regs; i++) {
irq_mask = 0;
if (i == 2)
irq_mask |= AXP_IRQ2_POKSIRQ;
@@ -393,20 +543,22 @@
&axppmic_power_funcs);
phandle = of_find_firstchild_byname(sc->sc_phandle, "regulators");
- if (phandle <= 0)
- return;
+ if (phandle > 0) {
+ aaa.reg_i2c = sc->sc_i2c;
+ aaa.reg_addr = sc->sc_addr;
+ for (i = 0; i < c->ncontrols; i++) {
+ const struct axppmic_ctrl *ctrl = &c->controls[i];
+ child = of_find_firstchild_byname(phandle, ctrl->c_name);
+ if (child <= 0)
+ continue;
+ aaa.reg_ctrl = ctrl;
+ aaa.reg_phandle = child;
+ config_found(sc->sc_dev, &aaa, NULL);
+ }
+ }
- aaa.reg_i2c = sc->sc_i2c;
- aaa.reg_addr = sc->sc_addr;
- for (i = 0; i < c->ncontrols; i++) {
- const struct axppmic_ctrl *ctrl = &c->controls[i];
- child = of_find_firstchild_byname(phandle, ctrl->c_name);
- if (child <= 0)
- continue;
- aaa.reg_ctrl = ctrl;
- aaa.reg_phandle = child;
- config_found(sc->sc_dev, &aaa, NULL);
- }
+ if (c->has_battery)
+ axppmic_attach_sensors(sc);
}
static int
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