From af6ba90048afb4e0db3ff2480364286f230f8b91 Mon Sep 17 00:00:00 2001 From: Suneel Garapati Date: Mon, 21 Oct 2019 16:09:36 -0700 Subject: watchdog: Add reset support for OcteonTX / TX2 Adds support for Core 0 watchdog poke on OcteonTX and OcteonTX2 platforms. Signed-off-by: Suneel Garapati Signed-off-by: Stefan Roese Reviewed-by: Simon Glass --- drivers/watchdog/octeontx_wdt.c | 66 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 drivers/watchdog/octeontx_wdt.c (limited to 'drivers/watchdog/octeontx_wdt.c') diff --git a/drivers/watchdog/octeontx_wdt.c b/drivers/watchdog/octeontx_wdt.c new file mode 100644 index 0000000000..1e0670e0c5 --- /dev/null +++ b/drivers/watchdog/octeontx_wdt.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Marvell International Ltd. + * + * https://spdx.org/licenses + */ + +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +#define CORE0_POKE_OFFSET 0x50000 +#define CORE0_POKE_OFFSET_MASK 0xfffffULL + +struct octeontx_wdt { + void __iomem *reg; +}; + +static int octeontx_wdt_reset(struct udevice *dev) +{ + struct octeontx_wdt *priv = dev_get_priv(dev); + + writeq(~0ULL, priv->reg); + + return 0; +} + +static int octeontx_wdt_probe(struct udevice *dev) +{ + struct octeontx_wdt *priv = dev_get_priv(dev); + + priv->reg = dev_remap_addr(dev); + if (!priv->reg) + return -EINVAL; + + /* + * Save core poke register address in reg (its not 0xa0000 as + * extracted from the DT but 0x50000 instead) + */ + priv->reg = (void __iomem *)(((u64)priv->reg & + ~CORE0_POKE_OFFSET_MASK) | + CORE0_POKE_OFFSET); + + return 0; +} + +static const struct wdt_ops octeontx_wdt_ops = { + .reset = octeontx_wdt_reset, +}; + +static const struct udevice_id octeontx_wdt_ids[] = { + { .compatible = "arm,sbsa-gwdt" }, + {} +}; + +U_BOOT_DRIVER(wdt_octeontx) = { + .name = "wdt_octeontx", + .id = UCLASS_WDT, + .of_match = octeontx_wdt_ids, + .ops = &octeontx_wdt_ops, + .priv_auto_alloc_size = sizeof(struct octeontx_wdt), + .probe = octeontx_wdt_probe, +}; -- cgit v1.2.3