Change in coreboot[master]: ec/google: Add PSRC and PBOK method

[Varshit B Pandya (Code Review)]

Attention is currently required from: Tim Wawrzynczak.
Varshit B Pandya has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/62945 )

Change subject: ec/google: Add PSRC and PBOK method
......................................................................

ec/google: Add PSRC and PBOK method

As per Intel Dynamic Tuning revision 1.3.13 add support for
PSRC and PBOK under _SB.DPTF.TPWR device
ec_fill_dptf_helpers() is used to generate all the helper
function that DPTF requires.

BUG=b:205928013
TEST=Buil, boot brya0 and dump SSDT to check methods

Signed-off-by: Varshit B Pandya 
Change-Id: Ia536a9e1528f6e415247eca9ed2b0b685eb73196
---
M src/ec/google/chromeec/ec_dptf_helpers.c
1 file changed, 46 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/45/62945/1

diff --git a/src/ec/google/chromeec/ec_dptf_helpers.c b/src/ec/google/chromeec/ec_dptf_helpers.c
index 94b13fb..3ecba8d 100644
--- a/src/ec/google/chromeec/ec_dptf_helpers.c
+++ b/src/ec/google/chromeec/ec_dptf_helpers.c
@@ -114,6 +114,43 @@
    acpigen_pop_len(); /* Method _FST */
 }

+static void write_power_psrc(const struct device *ec)
+{
+	acpigen_write_method_serialized("PSRC", 0);
+	/* Local0 = _SB.PCI0.LPCB.EC0.PWRT */
+	acpigen_write_store();
+	acpigen_emit_namestring(acpi_device_path_join(ec, "PWRT"));
+	acpigen_emit_byte(LOCAL0_OP);
+
+	/* Return ((Local0 && 0x0F)) */
+	acpigen_emit_byte(RETURN_OP);
+	acpigen_emit_byte(LAND_OP);
+	acpigen_emit_byte(LOCAL0_OP);
+	acpigen_write_byte(0x0F);
+
+	acpigen_pop_len(); /* Method PSRC */
+}
+
+static void write_power_pbok(const struct device *ec)
+{
+	acpigen_write_method_serialized("PBOK", 1);
+
+	acpigen_write_store();
+	acpigen_emit_byte(ARG0_OP);
+	acpigen_emit_byte(LOCAL0_OP);
+
+	acpigen_emit_byte(AND_OP);
+	acpigen_emit_byte(LOCAL0_OP);
+	acpigen_write_byte(0x0F);
+	acpigen_emit_byte(LOCAL0_OP);
+
+	acpigen_write_store();
+	acpigen_emit_byte(LOCAL0_OP);
+	acpigen_emit_namestring(acpi_device_path_join(ec, "PBOK"));
+
+	acpigen_pop_len(); /* Method PBOK */
+}
+
 static void write_fan_fsl(const struct device *ec)
 {
    /* _FSL */
@@ -302,6 +339,14 @@
    acpigen_pop_len(); /* Scope */
 }

+static void write_power_methods(const struct device *ec)
+{
+	dptf_write_scope(DPTF_TPWR);
+	write_power_psrc(ec);
+	write_power_pbok(ec);
+	acpigen_pop_len(); /* Scope */
+}
+
 static void write_thermal_methods(const struct device *ec, enum dptf_participant participant,
    			  int tsr_index)
 {
@@ -354,6 +399,7 @@
    write_dppm_methods(ec);
    write_charger_methods(ec);
    write_fan_methods(ec);
+	write_power_methods(ec);

for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_4; ++p, ++i)
    	write_thermal_methods(ec, p, i);