[Qemu-devel] [PATCH v4 8/8] arm: Add an RX8900 RTC to the ASpeed board

["Alastair D'Silva" <alastair@au1.ibm.com>]

From: Alastair D'Silva <alastair@d-silva.org>

Connect an RX8900 RTC to i2c12 of the AST2500 SOC at address 0x32

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Signed-off-by: Chris Smart <chris@distroguy.com>
---
 hw/arm/aspeed.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 40c1383..ef63fd0 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -26,6 +26,12 @@ static struct arm_boot_info aspeed_board_binfo = {
     .nb_cpus = 1,
 };
 
+typedef struct AspeedI2CDevice {
+    const char *type;
+    uint8_t address;
+    int bus;
+} AspeedI2CDevice;
+
 typedef struct AspeedBoardState {
     AspeedSoCState soc;
     MemoryRegion ram;
@@ -37,6 +43,7 @@ typedef struct AspeedBoardConfig {
     const char *fmc_model;
     const char *spi_model;
     uint32_t num_cs;
+    const AspeedI2CDevice *i2c_devices;
 } AspeedBoardConfig;
 
 enum {
@@ -80,6 +87,11 @@ enum {
         SCU_AST2500_HW_STRAP_ACPI_ENABLE |                              \
         SCU_HW_STRAP_SPI_MODE(SCU_HW_STRAP_SPI_MASTER))
 
+
+static const AspeedI2CDevice ast2500_i2c_devices[] = {
+        {"rx8900", 0x32, 11}
+};
+
 static const AspeedBoardConfig aspeed_boards[] = {
     [PALMETTO_BMC] = {
         .soc_name  = "ast2400-a1",
@@ -94,6 +106,7 @@ static const AspeedBoardConfig aspeed_boards[] = {
         .fmc_model = "n25q256a",
         .spi_model = "mx25l25635e",
         .num_cs    = 1,
+        .i2c_devices = ast2500_i2c_devices,
     },
     [ROMULUS_BMC]  = {
         .soc_name  = "ast2500-a1",
@@ -104,6 +117,7 @@ static const AspeedBoardConfig aspeed_boards[] = {
     },
 };
 
+
 static void aspeed_board_init_flashes(AspeedSMCState *s, const char *flashtype,
                                       Error **errp)
 {
@@ -130,6 +144,19 @@ static void aspeed_board_init_flashes(AspeedSMCState *s, const char *flashtype,
     }
 }
 
+static void aspeed_i2c_init(AspeedBoardState *bmc,
+        const AspeedBoardConfig *cfg)
+{
+    AspeedSoCState *soc = &bmc->soc;
+    const AspeedI2CDevice *dev;
+
+    for (dev = cfg->i2c_devices; dev != NULL && dev->type != NULL; dev++) {
+        I2CBus *i2c_bus = aspeed_i2c_get_bus((DeviceState *)&soc->i2c,
+                                             dev->bus);
+        (void)i2c_create_slave(i2c_bus, dev->type, dev->address);
+    }
+}
+
 static void aspeed_board_init(MachineState *machine,
                               const AspeedBoardConfig *cfg)
 {
@@ -174,6 +201,8 @@ static void aspeed_board_init(MachineState *machine,
     aspeed_board_binfo.ram_size = ram_size;
     aspeed_board_binfo.loader_start = sc->info->sdram_base;
 
+    aspeed_i2c_init(bmc, cfg);
+
     arm_load_kernel(ARM_CPU(first_cpu), &aspeed_board_binfo);
 }
 
-- 
2.9.3