[Qemu-devel] [PATCH v4 20/28] riscv: sifive_u: Reference PRCI clocks in UART and ethernet nodes

[Bin Meng <bmeng.cn@gmail.com>]

Now that we have added a PRCI node, update existing UART and ethernet
nodes to reference PRCI as their clock sources, to keep in sync with
the Linux kernel device tree.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 hw/riscv/sifive_u.c              |  7 ++++---
 include/hw/riscv/sifive_u_prci.h | 10 ++++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
index bd5551c..8818fd6 100644
--- a/hw/riscv/sifive_u.c
+++ b/hw/riscv/sifive_u.c
@@ -80,7 +80,7 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
     int cpu;
     uint32_t *cells;
     char *nodename;
-    char ethclk_names[] = "pclk\0hclk\0tx_clk";
+    char ethclk_names[] = "pclk\0hclk";
     uint32_t plic_phandle, prci_phandle, ethclk_phandle, phandle = 1;
     uint32_t uartclk_phandle;
     uint32_t hfclk_phandle, rtcclk_phandle;
@@ -265,7 +265,7 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
     qemu_fdt_setprop_cell(fdt, nodename, "interrupt-parent", plic_phandle);
     qemu_fdt_setprop_cell(fdt, nodename, "interrupts", SIFIVE_U_GEM_IRQ);
     qemu_fdt_setprop_cells(fdt, nodename, "clocks",
-        ethclk_phandle, ethclk_phandle, ethclk_phandle);
+        prci_phandle, PRCI_CLK_GEMGXLPLL, prci_phandle, PRCI_CLK_GEMGXLPLL);
     qemu_fdt_setprop(fdt, nodename, "clock-names", ethclk_names,
         sizeof(ethclk_names));
     qemu_fdt_setprop_cell(fdt, nodename, "#address-cells", 1);
@@ -295,7 +295,8 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap,
     qemu_fdt_setprop_cells(fdt, nodename, "reg",
         0x0, memmap[SIFIVE_U_UART0].base,
         0x0, memmap[SIFIVE_U_UART0].size);
-    qemu_fdt_setprop_cell(fdt, nodename, "clocks", uartclk_phandle);
+    qemu_fdt_setprop_cells(fdt, nodename, "clocks",
+        prci_phandle, PRCI_CLK_TLCLK);
     qemu_fdt_setprop_cell(fdt, nodename, "interrupt-parent", plic_phandle);
     qemu_fdt_setprop_cell(fdt, nodename, "interrupts", SIFIVE_U_UART0_IRQ);
 
diff --git a/include/hw/riscv/sifive_u_prci.h b/include/hw/riscv/sifive_u_prci.h
index 66eacb5..cdf1d33 100644
--- a/include/hw/riscv/sifive_u_prci.h
+++ b/include/hw/riscv/sifive_u_prci.h
@@ -87,4 +87,14 @@ typedef struct SiFiveUPRCIState {
 
 DeviceState *sifive_u_prci_create(hwaddr addr);
 
+/*
+ * Clock indexes for use by Device Tree data and the PRCI driver.
+ *
+ * These values are from sifive-fu540-prci.h in the Linux kernel.
+ */
+#define PRCI_CLK_COREPLL        0
+#define PRCI_CLK_DDRPLL         1
+#define PRCI_CLK_GEMGXLPLL      2
+#define PRCI_CLK_TLCLK          3
+
 #endif /* HW_SIFIVE_U_PRCI_H */
-- 
2.7.4