[PATCH 03/17] hw/arm/spitz: Keep pointers to MPU and SSI devices in SpitzMachineState

[Peter Maydell]

Keep pointers to the MPU and the SSI devices in SpitzMachineState.
We're going to want to make GPIO connections between some of the
SSI devices and the SCPs, so we want to keep hold of a pointer to
those; putting the MPU into the struct allows us to pass just
one thing to spitz_ssp_attach() rather than two.

We have to retain the setting of the global "max1111" variable
for the moment as it is used in spitz_adc_temp_on(); later in
this series of commits we will be able to remove it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/spitz.c | 50 ++++++++++++++++++++++++++++----------------------
 1 file changed, 28 insertions(+), 22 deletions(-)

diff --git a/hw/arm/spitz.c b/hw/arm/spitz.c
index c70e912a33d..f48e966c047 100644
--- a/hw/arm/spitz.c
+++ b/hw/arm/spitz.c
@@ -43,6 +43,11 @@ typedef struct {
 
 typedef struct {
     MachineState parent;
+    PXA2xxState *mpu;
+    DeviceState *mux;
+    DeviceState *lcdtg;
+    DeviceState *ads7846;
+    DeviceState *max1111;
 } SpitzMachineState;
 
 #define TYPE_SPITZ_MACHINE "spitz-common"
@@ -709,34 +714,33 @@ static void corgi_ssp_realize(SSISlave *d, Error **errp)
     s->bus[2] = ssi_create_bus(dev, "ssi2");
 }
 
-static void spitz_ssp_attach(PXA2xxState *cpu)
+static void spitz_ssp_attach(SpitzMachineState *sms)
 {
-    DeviceState *mux;
-    DeviceState *dev;
     void *bus;
 
-    mux = ssi_create_slave(cpu->ssp[CORGI_SSP_PORT - 1], "corgi-ssp");
+    sms->mux = ssi_create_slave(sms->mpu->ssp[CORGI_SSP_PORT - 1], 
"corgi-ssp");
 
-    bus = qdev_get_child_bus(mux, "ssi0");
-    ssi_create_slave(bus, "spitz-lcdtg");
+    bus = qdev_get_child_bus(sms->mux, "ssi0");
+    sms->lcdtg = ssi_create_slave(bus, "spitz-lcdtg");
 
-    bus = qdev_get_child_bus(mux, "ssi1");
-    dev = ssi_create_slave(bus, "ads7846");
-    qdev_connect_gpio_out(dev, 0,
-                          qdev_get_gpio_in(cpu->gpio, SPITZ_GPIO_TP_INT));
+    bus = qdev_get_child_bus(sms->mux, "ssi1");
+    sms->ads7846 = ssi_create_slave(bus, "ads7846");
+    qdev_connect_gpio_out(sms->ads7846, 0,
+                          qdev_get_gpio_in(sms->mpu->gpio, SPITZ_GPIO_TP_INT));
 
-    bus = qdev_get_child_bus(mux, "ssi2");
-    max1111 = ssi_create_slave(bus, "max1111");
-    max111x_set_input(max1111, MAX1111_BATT_VOLT, SPITZ_BATTERY_VOLT);
-    max111x_set_input(max1111, MAX1111_BATT_TEMP, 0);
-    max111x_set_input(max1111, MAX1111_ACIN_VOLT, SPITZ_CHARGEON_ACIN);
+    bus = qdev_get_child_bus(sms->mux, "ssi2");
+    sms->max1111 = ssi_create_slave(bus, "max1111");
+    max1111 = sms->max1111;
+    max111x_set_input(sms->max1111, MAX1111_BATT_VOLT, SPITZ_BATTERY_VOLT);
+    max111x_set_input(sms->max1111, MAX1111_BATT_TEMP, 0);
+    max111x_set_input(sms->max1111, MAX1111_ACIN_VOLT, SPITZ_CHARGEON_ACIN);
 
-    qdev_connect_gpio_out(cpu->gpio, SPITZ_GPIO_LCDCON_CS,
-                        qdev_get_gpio_in(mux, 0));
-    qdev_connect_gpio_out(cpu->gpio, SPITZ_GPIO_ADS7846_CS,
-                        qdev_get_gpio_in(mux, 1));
-    qdev_connect_gpio_out(cpu->gpio, SPITZ_GPIO_MAX1111_CS,
-                        qdev_get_gpio_in(mux, 2));
+    qdev_connect_gpio_out(sms->mpu->gpio, SPITZ_GPIO_LCDCON_CS,
+                        qdev_get_gpio_in(sms->mux, 0));
+    qdev_connect_gpio_out(sms->mpu->gpio, SPITZ_GPIO_ADS7846_CS,
+                        qdev_get_gpio_in(sms->mux, 1));
+    qdev_connect_gpio_out(sms->mpu->gpio, SPITZ_GPIO_MAX1111_CS,
+                        qdev_get_gpio_in(sms->mux, 2));
 }
 
 /* CF Microdrive */
@@ -936,6 +940,7 @@ static struct arm_boot_info spitz_binfo = {
 static void spitz_common_init(MachineState *machine)
 {
     SpitzMachineClass *smc = SPITZ_MACHINE_GET_CLASS(machine);
+    SpitzMachineState *sms = SPITZ_MACHINE(machine);
     enum spitz_model_e model = smc->model;
     PXA2xxState *mpu;
     DeviceState *scp0, *scp1 = NULL;
@@ -945,6 +950,7 @@ static void spitz_common_init(MachineState *machine)
     /* Setup CPU & memory */
     mpu = pxa270_init(address_space_mem, spitz_binfo.ram_size,
                       machine->cpu_type);
+    sms->mpu = mpu;
 
     sl_flash_register(mpu, (model == spitz) ? FLASH_128M : FLASH_1024M);
 
@@ -954,7 +960,7 @@ static void spitz_common_init(MachineState *machine)
     /* Setup peripherals */
     spitz_keyboard_register(mpu);
 
-    spitz_ssp_attach(mpu);
+    spitz_ssp_attach(sms);
 
     scp0 = sysbus_create_simple("scoop", 0x10800000, NULL);
     if (model != akita) {
-- 
2.20.1