[coreboot-gerrit] Change in coreboot[master]: mb/google/drallion: Set cpu id to EC

[EricR Lai (Code Review)]

EricR Lai has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/38566 )

Change subject: mb/google/drallion: Set cpu id to EC
......................................................................

mb/google/drallion: Set cpu id to EC

Set CPU ID and cores to EC then EC will according to different
CPU to set different power table.

BUG=b:148126144
BRANCH=None
TEST=check EC can get correct CPU id and cores.

Signed-off-by: Eric Lai 
Change-Id: I23f5580b15a20a01e03a5f4c798e73574f874c9a
---
M src/mainboard/google/drallion/ramstage.c
1 file changed, 21 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/66/38566/1

diff --git a/src/mainboard/google/drallion/ramstage.c b/src/mainboard/google/drallion/ramstage.c
index 3855045..daee09d 100644
--- a/src/mainboard/google/drallion/ramstage.c
+++ b/src/mainboard/google/drallion/ramstage.c
@@ -14,14 +14,19 @@
  */

#include <arch/acpi.h>
+#include <arch/cpu.h>
 #include <boardid.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
 #include <drivers/vpd/vpd.h>
+#include <ec/google/wilco/commands.h>
 #include <smbios.h>
 #include <soc/gpio.h>
 #include <soc/ramstage.h>
 #include <variant/gpio.h>
 #include <vendorcode/google/chromeos/chromeos.h>

+
 #define VPD_KEY_SYSTEM_SERIAL		"serial_number"
 #define VPD_KEY_MAINBOARD_SERIAL	"mlb_serial_number"
 #define VPD_SERIAL_LEN			64
@@ -59,6 +64,20 @@
    }
 }

+/* set cpu id to EC, default cores is 4 */
+static int set_cpu_id(void)
+{
+	uint16_t mch_id = 0;
+	uint8_t cpu_cores = 4;
+	const struct device *dev = pcidev_path_on_root(SA_DEVFN_ROOT);
+
+	mch_id = dev ? pci_read_config16(dev, PCI_DEVICE_ID) : 0xffff;
+	if (mch_id == PCI_DEVICE_ID_INTEL_CML_ULT_2_2)
+		cpu_cores = 2;
+
+	return wilco_ec_set_cpuid(cpu_get_cpuid(), cpu_cores, 0);
+}
+
 static void mainboard_init(void *chip_info)
 {
    const struct pad_config *gpio_table;
@@ -66,6 +85,8 @@

gpio_table = variant_gpio_table(&num_gpios);
    cnl_configure_pads(gpio_table, num_gpios);
+	if (set_cpu_id())
+		printk(BIOS_ERR, "wilco set cpu id failed\n");
 }

static void mainboard_enable(struct device *dev)