[coreboot-gerrit] Change in coreboot[master]: [Do not merge] Separate power resource for VCM

[Daniel Kang (Code Review)]

Daniel Kang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/45159 )

Change subject: [Do not merge] Separate power resource for VCM
......................................................................

[Do not merge] Separate power resource for VCM

WIP patch for discussion.

Signed-off-by: Daniel Kang 
Change-Id: Id51c98e42c5f20e231d8096c9d2d98deebc7c968
---
M src/mainboard/google/volteer/variants/baseboard/include/baseboard/acpi/mipi_camera.asl
1 file changed, 50 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/59/45159/1

diff --git a/src/mainboard/google/volteer/variants/baseboard/include/baseboard/acpi/mipi_camera.asl b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/acpi/mipi_camera.asl
index dad762a..ad0b782 100644
--- a/src/mainboard/google/volteer/variants/baseboard/include/baseboard/acpi/mipi_camera.asl
+++ b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/acpi/mipi_camera.asl
@@ -334,6 +334,54 @@
    	})
    }

+        PowerResource (VCPR, 0x00, 0x0000)
+        {
+                Name (STA, Zero)
+                Method (_ON, 0, Serialized)  /* VCPR_ON_: VCM Power On */
+                {
+                        If ((STA == Zero))
+                        {
+                                /* Enable IMG_CLK */
+                                MCON(3,1) /* Clock 3, 19.2MHz */
+
+                                /* Pull RST low */
+                                CTXS(GPP_F15)
+
+                                /* Pull PWREN high */
+                                STXS(GPP_H20)
+                                Sleep(2) /* reset pulse width */
+
+                                /* Pull RST high */
+                                STXS(GPP_F15)
+                                Sleep(1) /* t2 */
+
+                                Store(1,STA)
+                        }
+                }
+                Method (_OFF, 0, Serialized)  /* VCPR_OFF: VCM Power Off */
+                {
+                        If ((STA == One))
+                        {
+                                /* Disable IMG_CLK */
+                                Sleep(1) /* t0+t1 */
+                                MCOF(3) /* Clock 3 */
+
+                                /* Pull RST low */
+                                CTXS(GPP_F15)
+
+                                /* Pull PWREN low */
+                                CTXS(GPP_H20)
+
+                                Store(0,STA)
+                        }
+                }
+                Method (_STA, 0, NotSerialized)  /* _STA: Status */
+                {
+                        Return (STA)
+                }
+        }
+
+
    Device (VCM0)
    {
    	Name (_HID, "PRP0001")  /* _HID: Hardware ID */
@@ -356,11 +404,11 @@
    	})
    	Name (_PR0, Package (0x01)  /* _PR0: Power Resources for D0 */
    	{
-			RCPR
+			VCPR
    	})
    	Name (_PR3, Package (0x01)  /* _PR3: Power Resources for D3hot */
    	{
-			RCPR
+			VCPR
    	})
    	Name (_DSD, Package (0x02)  /* _DSD: Device-Specific Data */
    	{