hw/arm: Add I2C sensors and EEPROM for GSJ machine

Add AT24 EEPROM and temperature sensors for GSJ machine.

Reviewed-by: Doug Evans<dje@google.com>
Reviewed-by: Tyrong Ting<kfting@nuvoton.com>
Signed-off-by: Hao Wu <wuhaotsh@google.com>
Message-id: 20210210220426.3577804-4-wuhaotsh@google.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 28 insertions, 0 deletions

diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index be017b9..4e6f4ff 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -370,6 +370,7 @@ config NPCM7XX
     bool
     select A9MPCORE
     select ARM_GIC
+    select AT24C  # EEPROM
     select PL310  # cache controller
     select SERIAL
     select SSI
diff --git a/hw/arm/npcm7xx_boards.c b/hw/arm/npcm7xx_boards.c
index 47a215b..fbf6ce8 100644
--- a/hw/arm/npcm7xx_boards.c
+++ b/hw/arm/npcm7xx_boards.c
@@ -19,6 +19,7 @@
 #include "exec/address-spaces.h"
 #include "hw/arm/npcm7xx.h"
 #include "hw/core/cpu.h"
+#include "hw/i2c/smbus_eeprom.h"
 #include "hw/loader.h"
 #include "hw/qdev-properties.h"
 #include "qapi/error.h"
@@ -104,6 +105,17 @@ static I2CBus *npcm7xx_i2c_get_bus(NPCM7xxState *soc, uint32_t num)
     return I2C_BUS(qdev_get_child_bus(DEVICE(&soc->smbus[num]), "i2c-bus"));
 }
 
+static void at24c_eeprom_init(NPCM7xxState *soc, int bus, uint8_t addr,
+                              uint32_t rsize)
+{
+    I2CBus *i2c_bus = npcm7xx_i2c_get_bus(soc, bus);
+    I2CSlave *i2c_dev = i2c_slave_new("at24c-eeprom", addr);
+    DeviceState *dev = DEVICE(i2c_dev);
+
+    qdev_prop_set_uint32(dev, "rom-size", rsize);
+    i2c_slave_realize_and_unref(i2c_dev, i2c_bus, &error_abort);
+}
+
 static void npcm750_evb_i2c_init(NPCM7xxState *soc)
 {
     /* lm75 temperature sensor on SVB, tmp105 is compatible */
@@ -116,6 +128,20 @@ static void npcm750_evb_i2c_init(NPCM7xxState *soc)
     i2c_slave_create_simple(npcm7xx_i2c_get_bus(soc, 6), "tmp105", 0x48);
 }
 
+static void quanta_gsj_i2c_init(NPCM7xxState *soc)
+{
+    /* GSJ machine have 4 max31725 temperature sensors, tmp105 is compatible. */
+    i2c_slave_create_simple(npcm7xx_i2c_get_bus(soc, 1), "tmp105", 0x5c);
+    i2c_slave_create_simple(npcm7xx_i2c_get_bus(soc, 2), "tmp105", 0x5c);
+    i2c_slave_create_simple(npcm7xx_i2c_get_bus(soc, 3), "tmp105", 0x5c);
+    i2c_slave_create_simple(npcm7xx_i2c_get_bus(soc, 4), "tmp105", 0x5c);
+
+    at24c_eeprom_init(soc, 9, 0x55, 8192);
+    at24c_eeprom_init(soc, 10, 0x55, 8192);
+
+    /* TODO: Add additional i2c devices. */
+}
+
 static void npcm750_evb_init(MachineState *machine)
 {
     NPCM7xxState *soc;
@@ -141,6 +167,7 @@ static void quanta_gsj_init(MachineState *machine)
     npcm7xx_load_bootrom(machine, soc);
     npcm7xx_connect_flash(&soc->fiu[0], 0, "mx25l25635e",
                           drive_get(IF_MTD, 0, 0));
+    quanta_gsj_i2c_init(soc);
     npcm7xx_load_kernel(machine, soc);
 }