Add an I2C RTC device and a temperature sensor. These are not present on the board but help for testing.
The tmp105 is a lm75 compatible temperature sensor used by the SENSORS_LM75 Linux kernel driver. The ds1338 is a RTC device that is used by the RTC_DRV_DS1307 Linux kernel driver. Reviewed-by: Philippe Mathieu-Daudé <[email protected]> Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Joel Stanley <[email protected]> --- hw/riscv/tt_atlantis.c | 27 +++++++++++++++++++++++++++ hw/riscv/Kconfig | 2 ++ 2 files changed, 29 insertions(+) diff --git a/hw/riscv/tt_atlantis.c b/hw/riscv/tt_atlantis.c index b1ff0cbe2f61..5434650dd41e 100644 --- a/hw/riscv/tt_atlantis.c +++ b/hw/riscv/tt_atlantis.c @@ -63,6 +63,13 @@ static const MemMapEntry tt_atlantis_memmap[] = { [TT_ATL_DDR_HI] = { 0x100000000, 0x1000000000 }, }; +static I2CBus *i2c_get_bus(TTAtlantisState *s, unsigned busnr) +{ + assert(busnr < TT_ATL_NUM_I2C); + + return s->i2c[busnr].bus; +} + static uint32_t next_phandle(void) { static uint32_t phandle = 1; @@ -367,6 +374,19 @@ static void create_fdt_i2c(void *fdt, const MemMapEntry *mem, uint32_t irq, qemu_fdt_setprop_cell(fdt, name, "#size-cells", 0); } +static void create_fdt_i2c_device(TTAtlantisState *s, int bus, + const char *compat, int addr) +{ + void *fdt = MACHINE(s)->fdt; + hwaddr base = s->memmap[TT_ATL_I2C0 + bus].base; + g_autofree char *name = g_strdup_printf("/soc/i2c@%"HWADDR_PRIX"/sensor@%x", + base, addr); + + qemu_fdt_add_subnode(fdt, name); + qemu_fdt_setprop_string(fdt, name, "compatible", compat); + qemu_fdt_setprop_cell(fdt, name, "reg", addr); +} + static void finalize_fdt(TTAtlantisState *s) { uint32_t aplic_s_phandle = next_phandle(); @@ -394,6 +414,9 @@ static void finalize_fdt(TTAtlantisState *s) TT_ATL_I2C0_IRQ + i, aplic_s_phandle, periph_clk_phandle); } + + create_fdt_i2c_device(s, 0, "dallas,ds1338", 0x6f); + create_fdt_i2c_device(s, 4, "ti,tmp105", 0x48); } static void create_fdt(TTAtlantisState *s) @@ -640,6 +663,10 @@ static void tt_atlantis_machine_init(MachineState *machine) qdev_get_gpio_in(s->irqchip, TT_ATL_I2C0_IRQ + i)); } + /* I2C peripherals: qemu specific */ + i2c_slave_create_simple(i2c_get_bus(s, 0), "ds1338", 0x6f); + i2c_slave_create_simple(i2c_get_bus(s, 4), "tmp105", 0x48); + /* Load or create device tree */ if (machine->dtb) { load_fdt(s); diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig index 38180a903fbf..ff2d250ee439 100644 --- a/hw/riscv/Kconfig +++ b/hw/riscv/Kconfig @@ -130,6 +130,8 @@ config TENSTORRENT select SERIAL_MM select DEVICE_TREE select DESIGNWARE_I2C + select DS1338 + select TMP105 config XIANGSHAN_KUNMINGHU bool -- 2.47.3
