Change in coreboot[master]: drivers/intel/dptf: Add support for PROP method

[Varshit B Pandya (Code Review)]

Varshit B Pandya has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/63697 )

Change subject: drivers/intel/dptf: Add support for PROP method
......................................................................

drivers/intel/dptf: Add support for PROP method

Add PROP method under _SB.DPTF.TPWR scope which will return static worst case rest of
platform power in miliWatts.

This value is static, which has to configured from devicetree of overridetree for each
platform

BUG=b:205928013
TEST=Build, boot brya0 and dump SSDT to check PROP method

Scope (_SB.DPTF.TPWR)
{
    Method (PROP, 0, Serialized)
    {
         Return (XXXX)
    }
}

Signed-off-by: Varshit B Pandya 
Change-Id: I1415d2a9eb55cfadc3a7b41b53ecbec657002759
---
M src/drivers/intel/dptf/chip.h
M src/drivers/intel/dptf/dptf.c
2 files changed, 17 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/97/63697/1

diff --git a/src/drivers/intel/dptf/chip.h b/src/drivers/intel/dptf/chip.h
index 59b1e25..060f196 100644
--- a/src/drivers/intel/dptf/chip.h
+++ b/src/drivers/intel/dptf/chip.h
@@ -59,6 +59,9 @@
    struct {
    	uint32_t oem_variables[DPTF_OEM_VARIABLE_COUNT];
    } oem_data;
+
+	/* Rest of platform Power */
+	uint32_t prop;
 };

#endif /* _DRIVERS_INTEL_DPTF_CHIP_H_ */
diff --git a/src/drivers/intel/dptf/dptf.c b/src/drivers/intel/dptf/dptf.c
index 27c7133..f7980ef 100644
--- a/src/drivers/intel/dptf/dptf.c
+++ b/src/drivers/intel/dptf/dptf.c
@@ -508,6 +508,19 @@
    }
 }

+static void write_prop(const struct drivers_intel_dptf_config *config)
+{
+	/* Rest of Platform Power */
+	dptf_write_scope(DPTF_POWER);
+	acpigen_write_method_serialized("PROP", 0);
+
+	acpigen_emit_byte(RETURN_OP);
+	acpigen_write_integer(config->prop);
+
+	acpigen_pop_len(); /* Method PROP */
+	acpigen_pop_len(); /* DPTF_POWER scope */
+}
+
 /* Add custom tables and methods to SSDT */
 static void dptf_fill_ssdt(const struct device *dev)
 {
@@ -517,6 +530,7 @@
    write_policies(config);
    write_controls(config);
    write_options(config);
+	write_prop(config);

printk(BIOS_INFO, DPTF_DEVICE_PATH ": %s at %s\n", dev->chip_ops->name, dev_path(dev));
 }