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-rw-r--r--src/acpi/acpigen_dptf.c41
-rw-r--r--src/drivers/intel/dptf/chip.h4
-rw-r--r--src/drivers/intel/dptf/dptf.c3
-rw-r--r--src/include/acpi/acpigen_dptf.h17
4 files changed, 65 insertions, 0 deletions
diff --git a/src/acpi/acpigen_dptf.c b/src/acpi/acpigen_dptf.c
index 88cf386bc8..c18caf673e 100644
--- a/src/acpi/acpigen_dptf.c
+++ b/src/acpi/acpigen_dptf.c
@@ -7,6 +7,8 @@
#define TOPLEVEL_DPTF_SCOPE "\\_SB.DPTF"
/* Defaults */
+#define DEFAULT_RAW_UNIT "ma"
+
enum {
ART_REVISION = 0,
DEFAULT_PRIORITY = 100,
@@ -280,3 +282,42 @@ void dptf_write_critical_policies(const struct dptf_critical_policy *policies, i
acpigen_pop_len(); /* Scope */
}
}
+
+void dptf_write_charger_perf(const struct dptf_charger_perf *states, int max_count)
+{
+ char *pkg_count;
+ int i;
+
+ if (!max_count || !states[0].control)
+ return;
+
+ dptf_write_scope(DPTF_CHARGER);
+
+ /* PPSS - Participant Performance Supported States */
+ acpigen_write_method("PPSS", 0);
+ acpigen_emit_byte(RETURN_OP);
+
+ pkg_count = acpigen_write_package(0);
+ for (i = 0; i < max_count; ++i) {
+ if (!states[i].control)
+ break;
+
+ (*pkg_count)++;
+
+ /*
+ * 0, 0, 0, 0, # Reserved
+ * Control, Raw Performance, Raw Unit, 0 # Reserved
+ */
+ acpigen_write_package(8);
+ write_zeros(4);
+ acpigen_write_integer(states[i].control);
+ acpigen_write_integer(states[i].raw_perf);
+ acpigen_write_string(DEFAULT_RAW_UNIT);
+ acpigen_write_integer(0);
+ acpigen_pop_len(); /* inner Package */
+ }
+
+ acpigen_pop_len(); /* outer Package */
+ acpigen_pop_len(); /* Method PPSS */
+ acpigen_pop_len(); /* Scope */
+}
diff --git a/src/drivers/intel/dptf/chip.h b/src/drivers/intel/dptf/chip.h
index 8d77603f9e..528ba8354e 100644
--- a/src/drivers/intel/dptf/chip.h
+++ b/src/drivers/intel/dptf/chip.h
@@ -11,6 +11,10 @@ struct drivers_intel_dptf_config {
struct dptf_critical_policy critical[DPTF_MAX_CRITICAL_POLICIES];
struct dptf_passive_policy passive[DPTF_MAX_PASSIVE_POLICIES];
} policies;
+
+ struct {
+ struct dptf_charger_perf charger_perf[DPTF_MAX_CHARGER_PERF_STATES];
+ } controls;
};
#endif /* _DRIVERS_INTEL_DPTF_CHIP_H_ */
diff --git a/src/drivers/intel/dptf/dptf.c b/src/drivers/intel/dptf/dptf.c
index 5cad07dade..a20087fff3 100644
--- a/src/drivers/intel/dptf/dptf.c
+++ b/src/drivers/intel/dptf/dptf.c
@@ -72,6 +72,9 @@ static void dptf_fill_ssdt(const struct device *dev)
dptf_write_critical_policies(config->policies.critical,
DPTF_MAX_CRITICAL_POLICIES);
+ /* Controls */
+ dptf_write_charger_perf(config->controls.charger_perf, DPTF_MAX_CHARGER_PERF_STATES);
+
printk(BIOS_INFO, "\\_SB.DPTF: %s at %s\n", dev->chip_ops->name, dev_path(dev));
}
diff --git a/src/include/acpi/acpigen_dptf.h b/src/include/acpi/acpigen_dptf.h
index 45fbe8f29f..7588752aac 100644
--- a/src/include/acpi/acpigen_dptf.h
+++ b/src/include/acpi/acpigen_dptf.h
@@ -29,6 +29,9 @@ enum {
DPTF_MAX_ACTIVE_POLICIES = (DPTF_PARTICIPANT_COUNT-1),
DPTF_MAX_PASSIVE_POLICIES = (DPTF_PARTICIPANT_COUNT-1),
DPTF_MAX_CRITICAL_POLICIES = (DPTF_PARTICIPANT_COUNT-1),
+
+ /* Maximum found by automatic inspection (awk) */
+ DPTF_MAX_CHARGER_PERF_STATES = 10,
};
/* Active Policy */
@@ -76,6 +79,14 @@ struct dptf_critical_policy {
uint8_t temp;
};
+/* Different levels of charging capability, chosen by passive policies */
+struct dptf_charger_perf {
+ /* Control value */
+ uint8_t control;
+ /* Charging performance, in mA */
+ uint16_t raw_perf;
+};
+
/*
* This function provides tables of temperature and corresponding fan or percent. When the
* temperature thresholds are met (_AC0 - _AC9), the fan is driven to corresponding percentage
@@ -98,6 +109,12 @@ void dptf_write_passive_policies(const struct dptf_passive_policy *policies, int
*/
void dptf_write_critical_policies(const struct dptf_critical_policy *policies, int max_count);
+/*
+ * These are various performance levels for battery charging. They can be used in conjunction
+ * with passive policies to lower the charging rate when the _PSV threshold is met.
+ */
+void dptf_write_charger_perf(const struct dptf_charger_perf *perf, int max_count);
+
/* Helper method to open the scope for a given participant. */
void dptf_write_scope(enum dptf_participant participant);