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watchdog: orion: Add per-compatible clock initialization 

Following the introduction of the compatible-data field,
it's now possible to further abstract the clock initialization.
This will allow to support SoC with a different clock setup.

Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
Tested-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Ezequiel Garcia 2014-02-10 20:00:29 -03:00 committed by Jason Cooper
parent fc723856a4
commit 1924227bcd
1 changed files with 32 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/watchdog/orion_wdt.c
View File

@ -42,10 +42,14 @@
static bool nowayout = WATCHDOG_NOWAYOUT;
static int heartbeat = -1; /* module parameter (seconds) */
struct orion_watchdog;
struct orion_watchdog_data {
int wdt_counter_offset;
int wdt_enable_bit;
int rstout_enable_bit;
int (*clock_init)(struct platform_device *,
struct orion_watchdog *);
};
struct orion_watchdog {
@ -57,6 +61,22 @@ struct orion_watchdog {
const struct orion_watchdog_data *data;
};
static int orion_wdt_clock_init(struct platform_device *pdev,
struct orion_watchdog *dev)
{
int ret;
dev->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(dev->clk))
return PTR_ERR(dev->clk);
ret = clk_prepare_enable(dev->clk);
if (ret)
return ret;
dev->clk_rate = clk_get_rate(dev->clk);
return 0;
}
static int orion_wdt_ping(struct watchdog_device *wdt_dev)
{
struct orion_watchdog *dev = watchdog_get_drvdata(wdt_dev);
@ -172,6 +192,7 @@ static const struct orion_watchdog_data orion_data = {
.rstout_enable_bit = BIT(1),
.wdt_enable_bit = BIT(4),
.wdt_counter_offset = 0x24,
.clock_init = orion_wdt_clock_init,
};
static const struct of_device_id orion_wdt_of_match_table[] = {
@ -206,34 +227,24 @@ static int orion_wdt_probe(struct platform_device *pdev)
dev->wdt.min_timeout = 1;
dev->data = match->data;
dev->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(dev->clk)) {
dev_err(&pdev->dev, "Orion Watchdog missing clock\n");
return PTR_ERR(dev->clk);
}
ret = clk_prepare_enable(dev->clk);
if (ret)
return ret;
dev->clk_rate = clk_get_rate(dev->clk);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
goto disable_clk;
}
if (!res)
return -ENODEV;
dev->reg = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!dev->reg) {
ret = -ENOMEM;
goto disable_clk;
}
if (!dev->reg)
return -ENOMEM;
dev->rstout = orion_wdt_ioremap_rstout(pdev, res->start &
INTERNAL_REGS_MASK);
if (!dev->rstout) {
ret = -ENODEV;
goto disable_clk;
if (!dev->rstout)
return -ENODEV;
ret = dev->data->clock_init(pdev, dev);
if (ret) {
dev_err(&pdev->dev, "cannot initialize clock\n");
return ret;
}
wdt_max_duration = WDT_MAX_CYCLE_COUNT / dev->clk_rate;