aspeed/smc: set the number of flash modules for the FMC controller

Add a new configuration field at the board level and propagate the
value using the "num-cs" property of the FMC controller model.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-id: 1480434248-27138-14-git-send-email-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/aspeed.c

@@ -36,6 +36,7 @@ typedef struct AspeedBoardConfig {
     uint32_t hw_strap1;
     const char *fmc_model;
     const char *spi_model;
+    uint32_t num_cs;
 } AspeedBoardConfig;
 
 enum {
@@ -85,18 +86,21 @@ static const AspeedBoardConfig aspeed_boards[] = {
         .hw_strap1 = PALMETTO_BMC_HW_STRAP1,
         .fmc_model = "n25q256a",
         .spi_model = "mx25l25635e",
+        .num_cs    = 1,
     },
     [AST2500_EVB]  = {
         .soc_name  = "ast2500-a1",
         .hw_strap1 = AST2500_EVB_HW_STRAP1,
         .fmc_model = "n25q256a",
         .spi_model = "mx25l25635e",
+        .num_cs    = 1,
     },
     [ROMULUS_BMC]  = {
         .soc_name  = "ast2500-a1",
         .hw_strap1 = ROMULUS_BMC_HW_STRAP1,
         .fmc_model = "n25q256a",
         .spi_model = "mx66l1g45g",
+        .num_cs    = 2,
     },
 };
 
@@ -143,6 +147,8 @@ static void aspeed_board_init(MachineState *machine,
                            &error_abort);
     object_property_set_int(OBJECT(&bmc->soc), cfg->hw_strap1, "hw-strap1",
                             &error_abort);
+    object_property_set_int(OBJECT(&bmc->soc), cfg->num_cs, "num-cs",
+                            &error_abort);
     object_property_set_bool(OBJECT(&bmc->soc), true, "realized",
                              &error_abort);
 

hw/arm/aspeed_soc.c

@@ -153,6 +153,8 @@ static void aspeed_soc_init(Object *obj)
     object_initialize(&s->fmc, sizeof(s->fmc), sc->info->fmc_typename);
     object_property_add_child(obj, "fmc", OBJECT(&s->fmc), NULL);
     qdev_set_parent_bus(DEVICE(&s->fmc), sysbus_get_default());
+    object_property_add_alias(obj, "num-cs", OBJECT(&s->fmc), "num-cs",
+                              &error_abort);
 
     for (i = 0; i < sc->info->spis_num; i++) {
         object_initialize(&s->spi[i], sizeof(s->spi[i]),
@@ -250,10 +252,8 @@ static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c), 0,
                        qdev_get_gpio_in(DEVICE(&s->vic), 12));
 
-    /* FMC */
-    object_property_set_int(OBJECT(&s->fmc), 1, "num-cs", &err);
-    object_property_set_bool(OBJECT(&s->fmc), true, "realized", &local_err);
-    error_propagate(&err, local_err);
+    /* FMC, The number of CS is set at the board level */
+    object_property_set_bool(OBJECT(&s->fmc), true, "realized", &err);
     if (err) {
         error_propagate(errp, err);
         return;