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charset="utf-8" Conver the Ibex UART to use the recently added qdev-clock functions. Signed-off-by: Alistair Francis Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- include/hw/char/ibex_uart.h | 2 ++ hw/char/ibex_uart.c | 19 ++++++++++++++++++- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/include/hw/char/ibex_uart.h b/include/hw/char/ibex_uart.h index 2bec772615..322bfffd8b 100644 --- a/include/hw/char/ibex_uart.h +++ b/include/hw/char/ibex_uart.h @@ -101,6 +101,8 @@ typedef struct { uint32_t uart_val; uint32_t uart_timeout_ctrl; =20 + Clock *f_clk; + CharBackend chr; qemu_irq tx_watermark; qemu_irq rx_watermark; diff --git a/hw/char/ibex_uart.c b/hw/char/ibex_uart.c index 45cd724998..f967e6919a 100644 --- a/hw/char/ibex_uart.c +++ b/hw/char/ibex_uart.c @@ -28,6 +28,7 @@ #include "qemu/osdep.h" #include "hw/char/ibex_uart.h" #include "hw/irq.h" +#include "hw/qdev-clock.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" #include "qemu/log.h" @@ -330,7 +331,7 @@ static void ibex_uart_write(void *opaque, hwaddr addr, } if (value & UART_CTRL_NCO) { uint64_t baud =3D ((value & UART_CTRL_NCO) >> 16); - baud *=3D 1000; + baud *=3D clock_get_hz(s->f_clk); baud >>=3D 20; =20 s->char_tx_time =3D (NANOSECONDS_PER_SECOND / baud) * 10; @@ -385,6 +386,18 @@ static void ibex_uart_write(void *opaque, hwaddr addr, } } =20 +static void ibex_uart_clk_update(void *opaque) +{ + IbexUartState *s =3D opaque; + + /* recompute uart's speed on clock change */ + uint64_t baud =3D ((s->uart_ctrl & UART_CTRL_NCO) >> 16); + baud *=3D clock_get_hz(s->f_clk); + baud >>=3D 20; + + s->char_tx_time =3D (NANOSECONDS_PER_SECOND / baud) * 10; +} + static void fifo_trigger_update(void *opaque) { IbexUartState *s =3D opaque; @@ -444,6 +457,10 @@ static void ibex_uart_init(Object *obj) { IbexUartState *s =3D IBEX_UART(obj); =20 + s->f_clk =3D qdev_init_clock_in(DEVICE(obj), "f_clock", + ibex_uart_clk_update, s); + clock_set_hz(s->f_clk, 50000000); + sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->tx_watermark); sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->rx_watermark); sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->tx_empty); --=20 2.27.0