Add example rocket-chip-blocks timer integration

generators/chipyard/src/main/scala/DigitalTop.scala

@@ -22,6 +22,7 @@ class DigitalTop(implicit p: Parameters) extends ChipyardSystem
   with testchipip.serdes.CanHavePeripheryTLSerial // Enables optionally adding the backing memory and serial adapter
   with testchipip.soc.CanHavePeripheryChipIdPin // Enables optional pin to set chip id for multi-chip configs
   with sifive.blocks.devices.i2c.HasPeripheryI2C // Enables optionally adding the sifive I2C
+  with sifive.blocks.devices.timer.HasPeripheryTimer // Enables optionally adding the timer device
   with sifive.blocks.devices.pwm.HasPeripheryPWM // Enables optionally adding the sifive PWM
   with sifive.blocks.devices.uart.HasPeripheryUART // Enables optionally adding the sifive UART
   with sifive.blocks.devices.gpio.HasPeripheryGPIO // Enables optionally adding the sifive GPIOs

generators/chipyard/src/main/scala/config/PeripheralDeviceConfigs.scala

@@ -75,6 +75,7 @@ class ManyPeripheralsRocketConfig extends Config(
   new testchipip.serdes.WithSerialTLMem(isMainMemory=true) ++ // set lbwif memory base to DRAM_BASE, use as main memory
   new chipyard.harness.WithSimSPIFlashModel(true) ++         // add the SPI flash model in the harness (read-only)
   new chipyard.harness.WithSimBlockDevice ++                 // drive block-device IOs with SimBlockDevice
+  new chipyard.config.WithPeripheryTimer ++                  // add the pwm timer device
   new chipyard.config.WithSPIFlash ++                        // add the SPI flash controller
   new freechips.rocketchip.subsystem.WithDefaultMMIOPort ++  // add default external master port
   new freechips.rocketchip.subsystem.WithDefaultSlavePort ++ // add default external slave port

generators/chipyard/src/main/scala/config/fragments/PeripheralFragments.scala

@@ -16,6 +16,7 @@ import sifive.blocks.devices.gpio._
 import sifive.blocks.devices.uart._
 import sifive.blocks.devices.spi._
 import sifive.blocks.devices.i2c._
+import sifive.blocks.devices.timer._
 
 import testchipip._
 
@@ -168,3 +169,7 @@ class WithNoBusErrorDevices extends Config((site, here, up) => {
   case MemoryBusKey => up(MemoryBusKey).copy(errorDevice = None)
   case FrontBusKey => up(FrontBusKey).copy(errorDevice = None)
 })
+
+class WithPeripheryTimer(timerParams: TimerParams = TimerParams(0x4000)) extends Config((site, here, up) => {
+  case PeripheryTimerKey => Seq(timerParams)
+})