diff options
| author | Chris Packham <judge.packham@gmail.com> | 2019-02-18 10:30:53 +1300 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2019-04-12 07:04:18 +0200 |
| commit | 8e427ba35170a6b5966c28e59192d0561f989f65 (patch) | |
| tree | 2eb5b061f538322ae262532be43e97705ffbbc92 | |
| parent | 8562e41464e06389ea4965d71a91753700985456 (diff) | |
watchdog: orion_wdt: take timeout value in ms
The generic wdt_start API expects to be called with the timeout in
milliseconds. Update the orion_wdt driver to accept a timeout in
milliseconds and use the clock rate specified in the dts to convert the
timeout to an appropriate value for the timer reload register.
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
| -rw-r--r-- | board/CZ.NIC/turris_omnia/turris_omnia.c | 2 | ||||
| -rw-r--r-- | drivers/watchdog/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/watchdog/orion_wdt.c | 23 |
3 files changed, 21 insertions, 5 deletions
diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c index c7f6479a0c..c21d2f3ffa 100644 --- a/board/CZ.NIC/turris_omnia/turris_omnia.c +++ b/board/CZ.NIC/turris_omnia/turris_omnia.c @@ -379,7 +379,7 @@ int board_init(void) puts("Cannot find Armada 385 watchdog!\n"); } else { puts("Enabling Armada 385 watchdog.\n"); - wdt_start(watchdog_dev, (u32) 25000000 * 120, 0); + wdt_start(watchdog_dev, 120000, 0); } # endif diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 34e78beb2a..9d7f503b69 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -97,6 +97,7 @@ config WDT_BCM6345 config WDT_ORION bool "Orion watchdog timer support" depends on WDT + select CLK help Select this to enable Orion watchdog timer, which can be found on some Marvell Armada chips. diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c index c1add3e7c1..885821d562 100644 --- a/drivers/watchdog/orion_wdt.c +++ b/drivers/watchdog/orion_wdt.c @@ -14,7 +14,9 @@ #include <common.h> #include <dm.h> +#include <clk.h> #include <wdt.h> +#include <linux/kernel.h> #include <asm/io.h> #include <asm/arch/cpu.h> #include <asm/arch/soc.h> @@ -27,6 +29,8 @@ struct orion_wdt_priv { void __iomem *rstout; void __iomem *rstout_mask; u32 timeout; + unsigned long clk_rate; + struct clk clk; }; #define RSTOUT_ENABLE_BIT BIT(8) @@ -44,17 +48,18 @@ static int orion_wdt_reset(struct udevice *dev) struct orion_wdt_priv *priv = dev_get_priv(dev); /* Reload watchdog duration */ - writel(priv->timeout, priv->reg + priv->wdt_counter_offset); + writel(priv->clk_rate * priv->timeout, + priv->reg + priv->wdt_counter_offset); return 0; } -static int orion_wdt_start(struct udevice *dev, u64 timeout, ulong flags) +static int orion_wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags) { struct orion_wdt_priv *priv = dev_get_priv(dev); u32 reg; - priv->timeout = (u32) timeout; + priv->timeout = DIV_ROUND_UP(timeout_ms, 1000); /* Enable the fixed watchdog clock input */ reg = readl(priv->reg + TIMER_CTRL); @@ -62,7 +67,8 @@ static int orion_wdt_start(struct udevice *dev, u64 timeout, ulong flags) writel(reg, priv->reg + TIMER_CTRL); /* Set watchdog duration */ - writel(priv->timeout, priv->reg + priv->wdt_counter_offset); + writel(priv->clk_rate * priv->timeout, + priv->reg + priv->wdt_counter_offset); /* Clear the watchdog expiration bit */ reg = readl(priv->reg + TIMER_A370_STATUS); @@ -147,9 +153,18 @@ err: static int orion_wdt_probe(struct udevice *dev) { + struct orion_wdt_priv *priv = dev_get_priv(dev); + int ret; + debug("%s: Probing wdt%u\n", __func__, dev->seq); orion_wdt_stop(dev); + ret = clk_get_by_name(dev, "fixed", &priv->clk); + if (!ret) + priv->clk_rate = clk_get_rate(&priv->clk); + else + priv->clk_rate = 25000000; + return 0; } |