ramips/mt7621: enable support for cpuidle

MIPS Coherent Processor Systems (CPS), which include the MT7621 SoC, support
deep sleep idle states and have a specific cpuidle driver for them.
Enable support for it, while also switching from constant timer ticks to the
idle dynticks model, with the TEO governor.

Run-tested on a Redmi AC2100.

Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>

diff --git a/target/linux/ramips/mt7621/config-5.10 b/target/linux/ramips/mt7621/config-5.10
index 430ea9513c5a44a981a1f2b773822eb16a214d00..adbd0c8c6cc20f0198c92659ca6addd566a51a90 100644 (file)
--- a/target/linux/ramips/mt7621/config-5.10
+++ b/target/linux/ramips/mt7621/config-5.10
@@ -2,6 +2,7 @@ CONFIG_ARCH_32BIT_OFF_T=y
 CONFIG_ARCH_HIBERNATION_POSSIBLE=y
 CONFIG_ARCH_MMAP_RND_BITS_MAX=15
 CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=15
+CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED=y
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
 CONFIG_AT803X_PHY=y
 CONFIG_BLK_MQ_PCI=y
@@ -23,6 +24,9 @@ CONFIG_CPU_HAS_DIEI=y
 CONFIG_CPU_HAS_PREFETCH=y
 CONFIG_CPU_HAS_RIXI=y
 CONFIG_CPU_HAS_SYNC=y
+CONFIG_CPU_IDLE=y
+# CONFIG_CPU_IDLE_GOV_LADDER is not set
+CONFIG_CPU_IDLE_GOV_TEO=y
 CONFIG_CPU_MIPS32=y
 # CONFIG_CPU_MIPS32_R1 is not set
 CONFIG_CPU_MIPS32_R2=y
@@ -30,6 +34,7 @@ CONFIG_CPU_MIPSR2=y
 CONFIG_CPU_MIPSR2_IRQ_EI=y
 CONFIG_CPU_MIPSR2_IRQ_VI=y
 CONFIG_CPU_NEEDS_NO_SMARTMIPS_OR_MICROMIPS=y
+CONFIG_CPU_PM=y
 CONFIG_CPU_R4K_CACHE_TLB=y
 CONFIG_CPU_RMAP=y
 CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
@@ -97,7 +102,6 @@ CONFIG_HAS_IOPORT_MAP=y
 CONFIG_HIGHMEM=y
 CONFIG_HZ=250
 CONFIG_HZ_250=y
-CONFIG_HZ_PERIODIC=y
 CONFIG_I2C=y
 CONFIG_I2C_BOARDINFO=y
 CONFIG_I2C_MT7621=y
@@ -134,7 +138,9 @@ CONFIG_MIPS_CM=y
 CONFIG_MIPS_CMDLINE_FROM_DTB=y
 CONFIG_MIPS_CPC=y
 CONFIG_MIPS_CPS=y
+CONFIG_MIPS_CPS_CPUIDLE=y
 # CONFIG_MIPS_CPS_NS16550_BOOL is not set
+CONFIG_MIPS_CPS_PM=y
 CONFIG_MIPS_CPU_SCACHE=y
 # CONFIG_MIPS_ELF_APPENDED_DTB is not set
 CONFIG_MIPS_GIC=y
@@ -182,6 +188,8 @@ CONFIG_NET_MEDIATEK_SOC=y
 CONFIG_NET_SWITCHDEV=y
 CONFIG_NET_VENDOR_MEDIATEK=y
 # CONFIG_NET_VENDOR_RALINK is not set
+CONFIG_NO_HZ_COMMON=y
+CONFIG_NO_HZ_IDLE=y
 CONFIG_NR_CPUS=4
 CONFIG_OF=y
 CONFIG_OF_ADDRESS=y