This commit adds an orion_watchdog_data structure to hold compatible-data
information. This allows to remove the driver-wide definition and to
be able to add support for multiple compatible-strings in the future.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
---
drivers/watchdog/orion_wdt.c | 58 +++++++++++++++++++++++++++++++-------------
1 file changed, 41 insertions(+), 17 deletions(-)
diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index 96dba41..c978bcd 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -24,6 +24,7 @@
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/of.h>
+#include <linux/of_device.h>
/* RSTOUT mask register physical address for Orion5x, Kirkwood and Dove */
#define ORION_RSTOUT_MASK_OFFSET 0x20108
@@ -35,29 +36,33 @@
* Watchdog timer block registers.
*/
#define TIMER_CTRL 0x0000
-#define WDT_EN 0x0010
-#define WDT_VAL 0x0024
#define WDT_MAX_CYCLE_COUNT 0xffffffff
-#define WDT_RESET_OUT_EN BIT(1)
-
static bool nowayout = WATCHDOG_NOWAYOUT;
static int heartbeat = -1; /* module parameter (seconds) */
+struct orion_watchdog_data {
+ int wdt_counter_offset;
+ int wdt_enable_bit;
+ int rstout_enable_bit;
+};
+
struct orion_watchdog {
struct watchdog_device wdt;
void __iomem *reg;
void __iomem *rstout;
unsigned long clk_rate;
struct clk *clk;
+ const struct orion_watchdog_data *data;
};
static int orion_wdt_ping(struct watchdog_device *wdt_dev)
{
struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev);
/* Reload watchdog duration */
- writel(dev->clk_rate * wdt_dev->timeout, dev->reg + WDT_VAL);
+ writel(dev->clk_rate * wdt_dev->timeout,
+ dev->reg + dev->data->wdt_counter_offset);
return 0;
}
@@ -66,13 +71,16 @@ static int orion_wdt_start(struct watchdog_device *wdt_dev)
struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev);
/* Set watchdog duration */
- writel(dev->clk_rate * wdt_dev->timeout, dev->reg + WDT_VAL);
+ writel(dev->clk_rate * wdt_dev->timeout,
+ dev->reg + dev->data->wdt_counter_offset);
/* Enable watchdog timer */
- atomic_io_modify(dev->reg + TIMER_CTRL, WDT_EN, WDT_EN);
+ atomic_io_modify(dev->reg + TIMER_CTRL, dev->data->wdt_enable_bit,
+ dev->data->wdt_enable_bit);
/* Enable reset on watchdog */
- atomic_io_modify(dev->rstout, WDT_RESET_OUT_EN, WDT_RESET_OUT_EN);
+ atomic_io_modify(dev->rstout, dev->data->rstout_enable_bit,
+ dev->data->rstout_enable_bit);
return 0;
}
@@ -82,10 +90,10 @@ static int orion_wdt_stop(struct watchdog_device *wdt_dev)
struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev);
/* Disable reset on watchdog */
- atomic_io_modify(dev->rstout, WDT_RESET_OUT_EN, 0);
+ atomic_io_modify(dev->rstout, dev->data->rstout_enable_bit, 0);
/* Disable watchdog timer */
- atomic_io_modify(dev->reg + TIMER_CTRL, WDT_EN, 0);
+ atomic_io_modify(dev->reg + TIMER_CTRL, dev->data->wdt_enable_bit, 0);
return 0;
}
@@ -93,7 +101,7 @@ static int orion_wdt_stop(struct watchdog_device *wdt_dev)
static unsigned int orion_wdt_get_timeleft(struct watchdog_device *wdt_dev)
{
struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev);
- return readl(dev->reg + WDT_VAL) / dev->clk_rate;
+ return readl(dev->reg + dev->data->wdt_counter_offset) / dev->clk_rate;
}
static int orion_wdt_set_timeout(struct watchdog_device *wdt_dev,
@@ -150,9 +158,25 @@ static void __iomem * try_rstout_ioremap(struct platform_device *pdev,
return devm_ioremap(&pdev->dev, rstout, 0x4);
}
+static const struct orion_watchdog_data orion_data = {
+ .rstout_enable_bit = BIT(1),
+ .wdt_enable_bit = BIT(4),
+ .wdt_counter_offset = 0x24,
+};
+
+static const struct of_device_id orion_wdt_of_match_table[] = {
+ {
+ .compatible = "marvell,orion-wdt",
+ .data = &orion_data,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, orion_wdt_of_match_table);
+
static int orion_wdt_probe(struct platform_device *pdev)
{
struct orion_watchdog *dev;
+ const struct of_device_id *match;
unsigned int wdt_max_duration; /* (seconds) */
struct resource *res;
int ret, irq;
@@ -162,9 +186,15 @@ static int orion_wdt_probe(struct platform_device *pdev)
if (!dev)
return -ENOMEM;
+ match = of_match_device(orion_wdt_of_match_table, &pdev->dev);
+ if (!match)
+ /* Default legacy match */
+ match = &orion_wdt_of_match_table[0];
+
dev->wdt.info = &orion_wdt_info;
dev->wdt.ops = &orion_wdt_ops;
dev->wdt.min_timeout = 1;
+ dev->data = match->data;
dev->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(dev->clk)) {
@@ -252,12 +282,6 @@ static void orion_wdt_shutdown(struct platform_device *pdev)
orion_wdt_stop(wdt_dev);
}
-static const struct of_device_id orion_wdt_of_match_table[] = {
- { .compatible = "marvell,orion-wdt", },
- {},
-};
-MODULE_DEVICE_TABLE(of, orion_wdt_of_match_table);
-
static struct platform_driver orion_wdt_driver = {
.probe = orion_wdt_probe,
.remove = orion_wdt_remove,
--
1.8.1.5
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