motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-08 02:03:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

hw/arm/raspi: add a skeleton implementation of the CPRMAN

Browse source 
The BCM2835 CPRMAN is the clock manager of the SoC. It is composed of a
main oscillator, and several sub-components (PLLs, multiplexers, ...) to
generate the BCM2835 clock tree.

This commit adds a skeleton of the CPRMAN, with a dummy register
read/write implementation. It embeds the main oscillator (xosc) from
which all the clocks will be derived.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Luc Michel <luc@lmichel.fr>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Luc Michel 2020-10-10 15:57:49 +02:00 • committed by Peter Maydell
parent 74de7145fd
commit fc14176ba2
7 changed files with 242 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

11
hw/arm/bcm2835_peripherals.c
View file

@ -121,6 +121,9 @@ static void bcm2835_peripherals_init(Object *obj)
/* DWC2 */
object_initialize_child(obj, "dwc2", &s->dwc2, TYPE_DWC2_USB);
/* CPRMAN clock manager */
object_initialize_child(obj, "cprman", &s->cprman, TYPE_BCM2835_CPRMAN);
object_property_add_const_link(OBJECT(&s->dwc2), "dma-mr",
OBJECT(&s->gpu_bus_mr));
}
@ -160,6 +163,13 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
return;
}
/* CPRMAN clock manager */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->cprman), errp)) {
return;
}
memory_region_add_subregion(&s->peri_mr, CPRMAN_OFFSET,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->cprman), 0));
memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0));
sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
@ -355,7 +365,6 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
create_unimp(s, &s->txp, "bcm2835-txp", TXP_OFFSET, 0x1000);
create_unimp(s, &s->armtmr, "bcm2835-sp804", ARMCTRL_TIMER0_1_OFFSET, 0x40);
create_unimp(s, &s->powermgt, "bcm2835-powermgt", PM_OFFSET, 0x114);
create_unimp(s, &s->cprman, "bcm2835-cprman", CPRMAN_OFFSET, 0x2000);
create_unimp(s, &s->i2s, "bcm2835-i2s", I2S_OFFSET, 0x100);
create_unimp(s, &s->smi, "bcm2835-smi", SMI_OFFSET, 0x100);
create_unimp(s, &s->spi[0], "bcm2835-spi0", SPI0_OFFSET, 0x20);