[PATCH 17/26] hw/riscv: pfsoc: Add PolarFire SoC RTC to Icicle Kit

[Bin Meng <bin.meng@processmission.com>]

The Icicle Kit memory map advertises the PolarFire RTC, but the
machine leaves its MMIO range unmapped. Linux faults when it
programs the RTC prescaler during boot.

Select and instantiate the RTC, map it at the documented address,
and wire its wakeup and match outputs to PLIC interrupts 80 and 81.

Signed-off-by: Bin Meng <bin.meng@processmission.com>
---

 include/hw/riscv/microchip_pfsoc.h |  4 ++++
 hw/riscv/microchip_pfsoc.c         | 11 +++++++++++
 hw/riscv/Kconfig                   |  1 +
 3 files changed, 16 insertions(+)

diff --git a/include/hw/riscv/microchip_pfsoc.h b/include/hw/riscv/microchip_pfsoc.h
index 0aeccedf77..26d28252ea 100644
--- a/include/hw/riscv/microchip_pfsoc.h
+++ b/include/hw/riscv/microchip_pfsoc.h
@@ -31,6 +31,7 @@
 #include "hw/misc/mchp_pfsoc_ioscb.h"
 #include "hw/misc/mchp_pfsoc_sysreg.h"
 #include "hw/net/cadence_gem.h"
+#include "hw/rtc/mchp_pfsoc_rtc.h"
 #include "hw/sd/cadence_sdhci.h"
 #include "hw/riscv/riscv_hart.h"
 
@@ -53,6 +54,7 @@ typedef struct MicrochipPFSoCState {
     MchpPfSoCMMUartState *serial2;
     MchpPfSoCMMUartState *serial3;
     MchpPfSoCMMUartState *serial4;
+    MchpPfSoCRtcState rtc;
     MchpPfSoCSysregState sysreg;
     SiFivePDMAState dma;
     CadenceGEMState gem0;
@@ -148,6 +150,8 @@ enum {
     MICROCHIP_PFSOC_DMA_IRQ7 = 12,
     MICROCHIP_PFSOC_GEM0_IRQ = 64,
     MICROCHIP_PFSOC_GEM1_IRQ = 70,
+    MICROCHIP_PFSOC_RTC_WAKEUP_IRQ = 80,
+    MICROCHIP_PFSOC_RTC_MATCH_IRQ = 81,
     MICROCHIP_PFSOC_EMMC_SD_IRQ = 88,
     MICROCHIP_PFSOC_MMUART0_IRQ = 90,
     MICROCHIP_PFSOC_MMUART1_IRQ = 91,
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index 248de4d022..63658fbeb0 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -181,6 +181,8 @@ static void microchip_pfsoc_soc_instance_init(Object *obj)
     object_initialize_child(obj, "sysreg", &s->sysreg,
                             TYPE_MCHP_PFSOC_SYSREG);
 
+    object_initialize_child(obj, "rtc", &s->rtc, TYPE_MCHP_PFSOC_RTC);
+
     object_initialize_child(obj, "ddr-sgmii-phy", &s->ddr_sgmii_phy,
                             TYPE_MCHP_PFSOC_DDR_SGMII_PHY);
     object_initialize_child(obj, "ddr-cfg", &s->ddr_cfg,
@@ -308,6 +310,15 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, Error **errp)
         memmap[MICROCHIP_PFSOC_PLIC].size);
     g_free(plic_hart_config);
 
+    /* RTC */
+    sysbus_realize(SYS_BUS_DEVICE(&s->rtc), errp);
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->rtc), 0,
+                    memmap[MICROCHIP_PFSOC_RTC].base);
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->rtc), 0,
+        qdev_get_gpio_in(DEVICE(s->plic), MICROCHIP_PFSOC_RTC_WAKEUP_IRQ));
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->rtc), 1,
+        qdev_get_gpio_in(DEVICE(s->plic), MICROCHIP_PFSOC_RTC_MATCH_IRQ));
+
     /* DMA */
     sysbus_realize(SYS_BUS_DEVICE(&s->dma), errp);
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->dma), 0,
diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig
index 22619481e4..d69c9f7629 100644
--- a/hw/riscv/Kconfig
+++ b/hw/riscv/Kconfig
@@ -20,6 +20,7 @@ config MICROCHIP_PFSOC
     select MCHP_PFSOC_IOSCB
     select MCHP_PFSOC_L2CC
     select MCHP_PFSOC_MMUART
+    select MCHP_PFSOC_RTC
     select MCHP_PFSOC_SYSREG
     select RISCV_ACLINT
     select SIFIVE_PDMA
-- 
2.34.1