hw/arm/aspeed_ast1040_evb: Introduce onboard I2C device
Introduce onboard I2C device initialization for the AST1040 EVB model. Instantiate: - A 24C08-compatible EEPROM at address 0x50 on I2C bus 0 - A TMP105 temperature sensor at address 0x4d on I2C bus 1 Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com> Reviewed-by: Cédric Le Goater <clg@redhat.com> Link: https://lore.kernel.org/qemu-devel/20260603040027.938816-10-jamin_lin@aspeedtech.com Signed-off-by: Cédric Le Goater <clg@redhat.com>
Jamin Lin committed
Jun 3, 2026 at 04:00 UTC
5aee8a5d3d11172454de11388b0cf94f76abeb72
1 file changed
+15
hw/arm/aspeed_ast1040_evb.c
+15
@@ -14,6 +14,7 @@
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#include "hw/arm/aspeed_soc.h"
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#include "hw/core/qdev-clock.h"
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#include "system/system.h"
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+#include "hw/i2c/smbus_eeprom.h"
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#define AST1040_INTERNAL_FLASH_SIZE (4 * MiB)
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/* Main SYSCLK frequency in Hz (400MHz) */
@@ -38,12 +39,25 @@ static void aspeed_bic_machine_init(MachineState *machine)
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aspeed_connect_serial_hds_to_uarts(bmc);
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qdev_realize(DEVICE(bmc->soc), NULL, &error_abort);
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+ if (amc->i2c_init) {
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+ amc->i2c_init(bmc);
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+ }
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+
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armv7m_load_kernel(ARM_CPU(first_cpu),
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machine->kernel_filename,
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0,
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AST1040_INTERNAL_FLASH_SIZE);
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}
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+static void ast1040_evb_i2c_init(AspeedMachineState *bmc)
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+{
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+ AspeedSoCState *soc = bmc->soc;
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+ uint8_t *eeprom_buf = g_malloc0(256);
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+
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+ smbus_eeprom_init_one(aspeed_i2c_get_bus(&soc->i2c, 0), 0x50, eeprom_buf);
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+ i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 1), "tmp105", 0x4d);
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+}
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+
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static void aspeed_machine_ast1040_evb_class_init(ObjectClass *oc,
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const void *data)
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{
@@ -55,6 +69,7 @@ static void aspeed_machine_ast1040_evb_class_init(ObjectClass *oc,
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amc->hw_strap1 = 0;
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amc->hw_strap2 = 0;
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mc->init = aspeed_bic_machine_init;
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+ amc->i2c_init = ast1040_evb_i2c_init;
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mc->default_ram_size = 0;
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amc->macs_mask = 0;
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amc->uart_default = ASPEED_DEV_UART12;