diff options
| -rw-r--r-- | drivers/mailbox/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/mailbox/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mailbox/renesas-mfis.c | 59 |
3 files changed, 70 insertions, 0 deletions
diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index f9531c1627c..cfd2a3be3fd 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -66,6 +66,16 @@ config K3_SEC_PROXY Select this driver if your platform has support for this hardware block. +config RCAR_MFIS_MBOX + bool "Renesas MFIS Multifunctional Interface mailbox driver" + depends on DM_MAILBOX && ARCH_RENESAS + help + This enables support for the Renesas MFIS mailbox module, which + provides an interface between the different CPU Cores, such as AP + System Core domain and the Realtime Core domain, SCP Core domain + and AP System Core domain or Realtime Core domain and AP System + Core domain or Realtime Core domain. + config ZYNQMP_IPI bool "Xilinx ZynqMP IPI controller support" depends on DM_MAILBOX && (ARCH_ZYNQMP || ARCH_VERSAL || ARCH_VERSAL_NET || ARCH_VERSAL2) diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index b54fbdfff15..b3a36691497 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -12,4 +12,5 @@ obj-$(CONFIG_SANDBOX_MBOX) += sandbox-mbox-test.o obj-$(CONFIG_STM32_IPCC) += stm32-ipcc.o obj-$(CONFIG_TEGRA_HSP) += tegra-hsp.o obj-$(CONFIG_K3_SEC_PROXY) += k3-sec-proxy.o +obj-$(CONFIG_RCAR_MFIS_MBOX) += renesas-mfis.o obj-$(CONFIG_ZYNQMP_IPI) += zynqmp-ipi.o diff --git a/drivers/mailbox/renesas-mfis.c b/drivers/mailbox/renesas-mfis.c new file mode 100644 index 00000000000..1e9e8285974 --- /dev/null +++ b/drivers/mailbox/renesas-mfis.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020-2025, Renesas Electronics Corporation. + */ + +#include <asm/io.h> +#include <dm.h> +#include <linux/delay.h> +#include <mailbox-uclass.h> + +#define COM 0x0 +#define IIR BIT(0) + +struct mfis_priv { + void __iomem *tx_base; +}; + +static int mfis_send(struct mbox_chan *chan, const void *data) +{ + struct mfis_priv *mfis = dev_get_priv(chan->dev); + + writel(IIR, mfis->tx_base + COM); + + /* Give the remote side some time. */ + mdelay(1); + + writel(0, mfis->tx_base + COM); + + return 0; +} + +struct mbox_ops mfis_mbox_ops = { + .send = mfis_send, +}; + +static int mfis_mbox_probe(struct udevice *dev) +{ + struct mfis_priv *mbox = dev_get_priv(dev); + + mbox->tx_base = dev_read_addr_index_ptr(dev, 0); + if (!mbox->tx_base) + return -ENODEV; + + return 0; +} + +static const struct udevice_id mfis_mbox_of_match[] = { + { .compatible = "renesas,mfis-mbox", }, + {}, +}; + +U_BOOT_DRIVER(renesas_mfis) = { + .name = "renesas-mfis", + .id = UCLASS_MAILBOX, + .of_match = mfis_mbox_of_match, + .probe = mfis_mbox_probe, + .priv_auto = sizeof(struct mfis_priv), + .ops = &mfis_mbox_ops, +}; |