[PATCH 07/11] watchdog: Add support for ADI SC5XX-family watchdog peripheral
Stefan Roese
sr at denx.de
Thu May 16 07:39:06 CEST 2024
On 5/15/24 23:57, Greg Malysa wrote:
> From: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
>
> Co-developed-by: Greg Malysa <greg.malysa at timesys.com>
> Signed-off-by: Greg Malysa <greg.malysa at timesys.com>
> Co-developed-by: Ian Roberts <ian.roberts at timesys.com>
> Signed-off-by: Ian Roberts <ian.roberts at timesys.com>
> Signed-off-by: Vasileios Bimpikas <vasileios.bimpikas at analog.com>
> Signed-off-by: Utsav Agarwal <utsav.agarwal at analog.com>
> Signed-off-by: Arturs Artamonovs <arturs.artamonovs at analog.com>
> Signed-off-by: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
> ---
>
> MAINTAINERS | 1 +
> drivers/watchdog/Kconfig | 9 +++
> drivers/watchdog/Makefile | 1 +
> drivers/watchdog/adi_wdt.c | 145 +++++++++++++++++++++++++++++++++++++
> 4 files changed, 156 insertions(+)
> create mode 100644 drivers/watchdog/adi_wdt.c
Reviewed-by: Stefan Roese <sr at denx.de>
Thanks,
Stefan
> diff --git a/MAINTAINERS b/MAINTAINERS
> index c1685f0352..6feb7e540b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -618,6 +618,7 @@ F: drivers/pinctrl/pinctrl-adi-adsp.c
> F: drivers/serial/serial_adi_uart4.c
> F: drivers/timer/adi_sc5xx_timer.c
> F: drivers/usb/musb-new/sc5xx.c
> +F: drivers/watchdog/adi_wdt.c
> F: include/env/adi/
>
> ARM SNAPDRAGON
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index 8318fd77a3..5a62000272 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -94,6 +94,15 @@ config WDT_APPLE
> The watchdog will perform a full SoC reset resulting in a
> reboot of the entire system.
>
> +config WDT_ADI
> + bool "Analog Devices watchdog timer support"
> + select WDT
> + select SPL_WDT if SPL
> + depends on (SC57X || SC58X || SC59X || SC59X_64)
> + help
> + Enable this to support Watchdog Timer on ADI SC57X, SC58X, SC59X,
> + and SC59X_64 processors
> +
> config WDT_ARMADA_37XX
> bool "Marvell Armada 37xx watchdog timer support"
> depends on WDT && ARMADA_3700
> diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
> index 7b39adcf0f..7ad61b513c 100644
> --- a/drivers/watchdog/Makefile
> +++ b/drivers/watchdog/Makefile
> @@ -50,3 +50,4 @@ obj-$(CONFIG_WDT_STM32MP) += stm32mp_wdt.o
> obj-$(CONFIG_WDT_SUNXI) += sunxi_wdt.o
> obj-$(CONFIG_WDT_TANGIER) += tangier_wdt.o
> obj-$(CONFIG_WDT_XILINX) += xilinx_wwdt.o
> +obj-$(CONFIG_WDT_ADI) += adi_wdt.o
> diff --git a/drivers/watchdog/adi_wdt.c b/drivers/watchdog/adi_wdt.c
> new file mode 100644
> index 0000000000..67d17dc692
> --- /dev/null
> +++ b/drivers/watchdog/adi_wdt.c
> @@ -0,0 +1,145 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * (C) Copyright 2022 - Analog Devices, Inc.
> + *
> + * Written and/or maintained by Timesys Corporation
> + *
> + * Converted to driver model by Nathan Barrett-Morrison
> + *
> + * Contact: Nathan Barrett-Morrison <nathan.morrison at timesys.com>
> + * Contact: Greg Malysa <greg.malysa at timesys.com>
> + *
> + * adi_wtd.c - driver for ADI on-chip watchdog
> + *
> + */
> +
> +#include <clk.h>
> +#include <dm.h>
> +#include <wdt.h>
> +#include <linux/delay.h>
> +#include <linux/ioport.h>
> +#include <linux/io.h>
> +
> +#define WDOG_CTL 0x0
> +#define WDOG_CNT 0x4
> +#define WDOG_STAT 0x8
> +
> +#define RCU_CTL 0x0
> +#define RCU_STAT 0x4
> +
> +#define SEC_GCTL 0x0
> +#define SEC_FCTL 0x10
> +#define SEC_SCTL0 0x800
> +
> +#define WDEN 0x0010
> +#define WDDIS 0x0AD0
> +
> +struct adi_wdt_priv {
> + void __iomem *rcu_base;
> + void __iomem *sec_base;
> + void __iomem *wdt_base;
> + struct clk clock;
> +};
> +
> +static int adi_wdt_reset(struct udevice *dev)
> +{
> + struct adi_wdt_priv *priv = dev_get_priv(dev);
> +
> + writel(0, priv->wdt_base + WDOG_STAT);
> +
> + return 0;
> +}
> +
> +static int adi_wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags)
> +{
> + struct adi_wdt_priv *priv = dev_get_priv(dev);
> + u32 sctl_val;
> +
> + /* Disable SYSCD_RESETb input and clear the RCU0 reset status */
> + writel(0xf, priv->rcu_base + RCU_STAT);
> + writel(0x0, priv->rcu_base + RCU_CTL);
> +
> + /* reset the SEC controller */
> + writel(0x2, priv->sec_base + SEC_GCTL);
> + writel(0x2, priv->sec_base + SEC_FCTL);
> +
> + udelay(50);
> +
> + /* enable SEC fault event */
> + writel(0x1, priv->sec_base + SEC_GCTL);
> +
> + /* ANOMALY 36100004 Spurious External Fault event occurs when FCTL
> + * is re-programmed when currently active fault is not cleared
> + */
> + writel(0xc0, priv->sec_base + SEC_FCTL);
> + writel(0xc1, priv->sec_base + SEC_FCTL);
> +
> + /* enable SEC fault source for watchdog0 */
> + sctl_val = readl((priv->sec_base + SEC_SCTL0) + 3 * 8) | 0x6;
> + writel(sctl_val, (priv->sec_base + SEC_SCTL0) + 3 * 8);
> +
> + /* Enable SYSCD_RESETb input */
> + writel(0x100, priv->rcu_base + RCU_CTL);
> +
> + /* enable watchdog0 */
> + writel(WDDIS, priv->wdt_base + WDOG_CTL);
> +
> + writel(timeout_ms / 1000 *
> + (clk_get_rate(&priv->clock) / (IS_ENABLED(CONFIG_SC58X) ? 2 : 1)),
> + priv->wdt_base + WDOG_CNT);
> +
> + writel(0, priv->wdt_base + WDOG_STAT);
> + writel(WDEN, priv->wdt_base + WDOG_CTL);
> +
> + return 0;
> +}
> +
> +static int adi_wdt_probe(struct udevice *dev)
> +{
> + struct adi_wdt_priv *priv = dev_get_priv(dev);
> + int ret;
> + struct resource res;
> +
> + ret = dev_read_resource_byname(dev, "rcu", &res);
> + if (ret)
> + return ret;
> + priv->rcu_base = devm_ioremap(dev, res.start, resource_size(&res));
> +
> + ret = dev_read_resource_byname(dev, "sec", &res);
> + if (ret)
> + return ret;
> + priv->sec_base = devm_ioremap(dev, res.start, resource_size(&res));
> +
> + ret = dev_read_resource_byname(dev, "wdt", &res);
> + if (ret)
> + return ret;
> + priv->wdt_base = devm_ioremap(dev, res.start, resource_size(&res));
> +
> + ret = clk_get_by_name(dev, "sclk0", &priv->clock);
> + if (ret < 0) {
> + printf("Can't get WDT clk: %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static const struct wdt_ops adi_wdt_ops = {
> + .start = adi_wdt_start,
> + .reset = adi_wdt_reset,
> +};
> +
> +static const struct udevice_id adi_wdt_ids[] = {
> + { .compatible = "adi,wdt" },
> + {}
> +};
> +
> +U_BOOT_DRIVER(adi_wdt) = {
> + .name = "adi_wdt",
> + .id = UCLASS_WDT,
> + .of_match = adi_wdt_ids,
> + .probe = adi_wdt_probe,
> + .ops = &adi_wdt_ops,
> + .priv_auto = sizeof(struct adi_wdt_priv),
> + .flags = DM_FLAG_PRE_RELOC,
> +};
Viele Grüße,
Stefan Roese
--
DENX Software Engineering GmbH, Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr at denx.de
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