From: Ibai Erkiaga ibai.erkiaga-elorza@xilinx.com
zynqmp-power driver for ZynqMP to handle the communication with the PMU firmware. Firmware driver just probes subnodes and power driver handles communication with PMU using the IPI mailbox driver.
Signed-off-by: Ibai Erkiaga ibai.erkiaga-elorza@xilinx.com Signed-off-by: Michal Simek michal.simek@xilinx.com ---
Changes in v2: - Check error separately - Reported by Luca
drivers/firmware/Kconfig | 2 ++ drivers/firmware/firmware-zynqmp.c | 44 ++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+)
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index b70a2063551c..9596ec16c7f7 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -30,6 +30,8 @@ config TI_SCI_PROTOCOL config ZYNQMP_FIRMWARE bool "ZynqMP Firmware interface" select FIRMWARE + select ZYNQMP_IPI + select DM_MAILBOX help Firmware interface driver is used by different drivers to communicate with the firmware for diff --git a/drivers/firmware/firmware-zynqmp.c b/drivers/firmware/firmware-zynqmp.c index 6644a7166ca0..97ac333296ec 100644 --- a/drivers/firmware/firmware-zynqmp.c +++ b/drivers/firmware/firmware-zynqmp.c @@ -1,6 +1,50 @@ // SPDX-License-Identifier: GPL-2.0 +/* + * Xilinx Zynq MPSoC Firmware driver + * + * Copyright (C) 2018-2019 Xilinx, Inc. + */
+#include <common.h> #include <dm.h> +#include <mailbox.h> +#include <asm/arch/sys_proto.h> + +struct zynqmp_power { + struct mbox_chan tx_chan; + struct mbox_chan rx_chan; +} zynqmp_power; + +static int zynqmp_power_probe(struct udevice *dev) +{ + int ret = 0; + + debug("%s, (dev=%p)\n", __func__, dev); + + ret = mbox_get_by_name(dev, "tx", &zynqmp_power.tx_chan); + if (ret) { + debug("%s, cannot tx mailbox\n", __func__); + return ret; + } + + ret = mbox_get_by_name(dev, "rx", &zynqmp_power.rx_chan); + if (ret) + debug("%s, cannot rx mailbox\n", __func__); + + return ret; +}; + +static const struct udevice_id zynqmp_power_ids[] = { + { .compatible = "xlnx,zynqmp-power" }, + { } +}; + +U_BOOT_DRIVER(zynqmp_power) = { + .name = "zynqmp_power", + .id = UCLASS_FIRMWARE, + .of_match = zynqmp_power_ids, + .probe = zynqmp_power_probe, +};
static const struct udevice_id zynqmp_firmware_ids[] = { { .compatible = "xlnx,zynqmp-firmware" },