diff options
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/rt2880_wdt.c | 89 |
1 files changed, 50 insertions, 39 deletions
diff --git a/drivers/watchdog/rt2880_wdt.c b/drivers/watchdog/rt2880_wdt.c index 49aff800824d..e54737bcf939 100644 --- a/drivers/watchdog/rt2880_wdt.c +++ b/drivers/watchdog/rt2880_wdt.c @@ -40,10 +40,13 @@ #define TMR1CTL_PRESCALE_MASK 0xf #define TMR1CTL_PRESCALE_65536 0xf -static struct clk *rt288x_wdt_clk; -static unsigned long rt288x_wdt_freq; -static void __iomem *rt288x_wdt_base; -static struct reset_control *rt288x_wdt_reset; +struct rt2880_wdt_data { + void __iomem *base; + unsigned long freq; + struct clk *clk; + struct reset_control *rst; + struct watchdog_device wdt; +}; static bool nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, bool, 0); @@ -51,52 +54,56 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); -static inline void rt_wdt_w32(unsigned reg, u32 val) +static inline void rt_wdt_w32(void __iomem *base, unsigned reg, u32 val) { - iowrite32(val, rt288x_wdt_base + reg); + iowrite32(val, base + reg); } -static inline u32 rt_wdt_r32(unsigned reg) +static inline u32 rt_wdt_r32(void __iomem *base, unsigned reg) { - return ioread32(rt288x_wdt_base + reg); + return ioread32(base + reg); } static int rt288x_wdt_ping(struct watchdog_device *w) { - rt_wdt_w32(TIMER_REG_TMR1LOAD, w->timeout * rt288x_wdt_freq); + struct rt2880_wdt_data *drvdata = watchdog_get_drvdata(w); + + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1LOAD, w->timeout * drvdata->freq); return 0; } static int rt288x_wdt_start(struct watchdog_device *w) { + struct rt2880_wdt_data *drvdata = watchdog_get_drvdata(w); u32 t; - t = rt_wdt_r32(TIMER_REG_TMR1CTL); + t = rt_wdt_r32(drvdata->base, TIMER_REG_TMR1CTL); t &= ~(TMR1CTL_MODE_MASK << TMR1CTL_MODE_SHIFT | TMR1CTL_PRESCALE_MASK); t |= (TMR1CTL_MODE_WDT << TMR1CTL_MODE_SHIFT | TMR1CTL_PRESCALE_65536); - rt_wdt_w32(TIMER_REG_TMR1CTL, t); + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1CTL, t); rt288x_wdt_ping(w); - t = rt_wdt_r32(TIMER_REG_TMR1CTL); + t = rt_wdt_r32(drvdata->base, TIMER_REG_TMR1CTL); t |= TMR1CTL_ENABLE; - rt_wdt_w32(TIMER_REG_TMR1CTL, t); + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1CTL, t); return 0; } static int rt288x_wdt_stop(struct watchdog_device *w) { + struct rt2880_wdt_data *drvdata = watchdog_get_drvdata(w); u32 t; rt288x_wdt_ping(w); - t = rt_wdt_r32(TIMER_REG_TMR1CTL); + t = rt_wdt_r32(drvdata->base, TIMER_REG_TMR1CTL); t &= ~TMR1CTL_ENABLE; - rt_wdt_w32(TIMER_REG_TMR1CTL, t); + rt_wdt_w32(drvdata->base, TIMER_REG_TMR1CTL, t); return 0; } @@ -130,41 +137,45 @@ static const struct watchdog_ops rt288x_wdt_ops = { .set_timeout = rt288x_wdt_set_timeout, }; -static struct watchdog_device rt288x_wdt_dev = { - .info = &rt288x_wdt_info, - .ops = &rt288x_wdt_ops, - .min_timeout = 1, -}; - static int rt288x_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct watchdog_device *wdt; + struct rt2880_wdt_data *drvdata; int ret; - rt288x_wdt_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(rt288x_wdt_base)) - return PTR_ERR(rt288x_wdt_base); + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + drvdata->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(drvdata->base)) + return PTR_ERR(drvdata->base); - rt288x_wdt_clk = devm_clk_get(dev, NULL); - if (IS_ERR(rt288x_wdt_clk)) - return PTR_ERR(rt288x_wdt_clk); + drvdata->clk = devm_clk_get(dev, NULL); + if (IS_ERR(drvdata->clk)) + return PTR_ERR(drvdata->clk); - rt288x_wdt_reset = devm_reset_control_get_exclusive(dev, NULL); - if (!IS_ERR(rt288x_wdt_reset)) - reset_control_deassert(rt288x_wdt_reset); + drvdata->rst = devm_reset_control_get_exclusive(dev, NULL); + if (!IS_ERR(drvdata->rst)) + reset_control_deassert(drvdata->rst); - rt288x_wdt_freq = clk_get_rate(rt288x_wdt_clk) / RALINK_WDT_PRESCALE; + drvdata->freq = clk_get_rate(drvdata->clk) / RALINK_WDT_PRESCALE; - rt288x_wdt_dev.bootstatus = rt288x_wdt_bootcause(); - rt288x_wdt_dev.max_timeout = (0xfffful / rt288x_wdt_freq); - rt288x_wdt_dev.parent = dev; + wdt = &drvdata->wdt; + wdt->info = &rt288x_wdt_info; + wdt->ops = &rt288x_wdt_ops; + wdt->min_timeout = 1; + wdt->max_timeout = (0xfffful / drvdata->freq); + wdt->parent = dev; + wdt->bootstatus = rt288x_wdt_bootcause(); - watchdog_init_timeout(&rt288x_wdt_dev, rt288x_wdt_dev.max_timeout, - dev); - watchdog_set_nowayout(&rt288x_wdt_dev, nowayout); + watchdog_init_timeout(wdt, wdt->max_timeout, dev); + watchdog_set_nowayout(wdt, nowayout); + watchdog_set_drvdata(wdt, drvdata); - watchdog_stop_on_reboot(&rt288x_wdt_dev); - ret = devm_watchdog_register_device(dev, &rt288x_wdt_dev); + watchdog_stop_on_reboot(wdt); + ret = devm_watchdog_register_device(dev, &drvdata->wdt); if (!ret) dev_info(dev, "Initialized\n"); |