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tools/litex_json2dts: add --polling args to allow forcing polling mode on peripherals.

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Can be useful for debug purpose or bring up of new hardware not yet supporting IRQs.
This commit is contained in:
Florent Kermarrec 2020-12-29 09:02:56 +01:00
parent d9a44ce10f
commit bf32d23d9a
1 changed files with 16 additions and 14 deletions
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14
litex/tools/litex_json2dts.py
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@ -12,7 +12,7 @@ import json
import argparse
def generate_dts(d, initrd_start=None, initrd_size=None):
def generate_dts(d, initrd_start=None, initrd_size=None, polling=False):
kB = 1024
mB = kB*1024
@ -184,12 +184,12 @@ def generate_dts(d, initrd_start=None, initrd_size=None):
device_type = "serial";
compatible = "litex,liteuart";
reg = <0x{uart_csr_base:x} 0x100>;
interrupts = <{uart_interrupt}>;
{uart_interrupt}
status = "okay";
}};
""".format(
uart_csr_base = d["csr_bases"]["uart"],
uart_interrupt = d["constants"]["uart_interrupt"])
uart_interrupt = "" if polling else "interrupts = <{}>;".format(d["constants"]["uart_interrupt"]))
# Ethernet -------------------------------------------------------------------------------------
@ -202,7 +202,7 @@ def generate_dts(d, initrd_start=None, initrd_size=None):
<0x{ethmac_mem_base:x} 0x2000>;
tx-fifo-depth = <{ethmac_tx_slots}>;
rx-fifo-depth = <{ethmac_rx_slots}>;
interrupts = <{ethmac_interrupt}>;
{ethmac_interrupt}
}};
""".format(
ethphy_csr_base = d["csr_bases"]["ethphy"],
@ -210,7 +210,7 @@ def generate_dts(d, initrd_start=None, initrd_size=None):
ethmac_mem_base = d["memories"]["ethmac"]["base"],
ethmac_tx_slots = d["constants"]["ethmac_tx_slots"],
ethmac_rx_slots = d["constants"]["ethmac_rx_slots"],
ethmac_interrupt = d["constants"]["ethmac_interrupt"])
ethmac_interrupt = "" if polling else "interrupts = <{}>;".format(d["constants"]["ethmac_interrupt"]))
# SPI Flash -------------------------------------------------------------------------------------
@ -553,12 +553,14 @@ def main():
parser.add_argument("csr_json", help="CSR JSON file")
parser.add_argument("--initrd-start", type=int, help="Location of initrd in RAM (relative, default depends on CPU)")
parser.add_argument("--initrd-size", type=int, help="Size of initrd (default=8MB)")
parser.add_argument("--polling", action="store_true", help="Force polling mode on peripherals")
args = parser.parse_args()
d = json.load(open(args.csr_json))
r = generate_dts(d,
initrd_start = args.initrd_start,
initrd_size = args.initrd_size
initrd_size = args.initrd_size,
polling = args.polling,
)
print(r)