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watchdog: bcm7038_wdt: Support platform data configuration
The BCM7038 watchdog driver needs to be able to obtain a specific clock name on BCM63xx platforms which is the "periph" clock ticking at 50MHz. make it possible to specify the clock name to obtain via platform data. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20211112224636.395101-4-f.fainelli@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
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commit
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2 changed files with 15 additions and 1 deletions
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@ -10,6 +10,7 @@
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/platform_data/bcm7038_wdt.h>
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#include <linux/pm.h>
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#include <linux/watchdog.h>
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@ -133,8 +134,10 @@ static void bcm7038_clk_disable_unprepare(void *data)
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static int bcm7038_wdt_probe(struct platform_device *pdev)
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{
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struct bcm7038_wdt_platform_data *pdata = pdev->dev.platform_data;
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struct device *dev = &pdev->dev;
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struct bcm7038_watchdog *wdt;
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const char *clk_name = NULL;
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int err;
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wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
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@ -147,7 +150,10 @@ static int bcm7038_wdt_probe(struct platform_device *pdev)
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if (IS_ERR(wdt->base))
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return PTR_ERR(wdt->base);
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wdt->clk = devm_clk_get(dev, NULL);
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if (pdata && pdata->clk_name)
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clk_name = pdata->clk_name;
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wdt->clk = devm_clk_get(dev, clk_name);
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/* If unable to get clock, use default frequency */
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if (!IS_ERR(wdt->clk)) {
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err = clk_prepare_enable(wdt->clk);
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8
include/linux/platform_data/bcm7038_wdt.h
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8
include/linux/platform_data/bcm7038_wdt.h
Normal file
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@ -0,0 +1,8 @@
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#ifndef __BCM7038_WDT_PDATA_H
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#define __BCM7038_WDT_PDATA_H
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struct bcm7038_wdt_platform_data {
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const char *clk_name;
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};
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#endif /* __BCM7038_WDT_PDATA_H */
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