| Message ID | 20210714153314.1004147-2-linus.walleij@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] dt-bindings: watchdog: Add Maxim MAX63xx bindings | expand |
On Wed, Jul 14, 2021 at 05:33:14PM +0200, Linus Walleij wrote: > This adds device tree probing to the MAX63xx driver so it can be > instantiated from the device tree. We use the generic fwnode-based > method to get to the match data and clean up by constifying the > functions as the match is indeed a const. > > Cc: Marc Zyngier <maz@kernel.org> > Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/watchdog/max63xx_wdt.c | 24 ++++++++++++++++++++---- > 1 file changed, 20 insertions(+), 4 deletions(-) > > diff --git a/drivers/watchdog/max63xx_wdt.c b/drivers/watchdog/max63xx_wdt.c > index 3a899628a834..9e1541cfae0d 100644 > --- a/drivers/watchdog/max63xx_wdt.c > +++ b/drivers/watchdog/max63xx_wdt.c > @@ -26,6 +26,7 @@ > #include <linux/spinlock.h> > #include <linux/io.h> > #include <linux/slab.h> > +#include <linux/property.h> > > #define DEFAULT_HEARTBEAT 60 > #define MAX_HEARTBEAT 60 > @@ -99,8 +100,8 @@ static const struct max63xx_timeout max6373_table[] = { > { }, > }; > > -static struct max63xx_timeout * > -max63xx_select_timeout(struct max63xx_timeout *table, int value) > +static const struct max63xx_timeout * > +max63xx_select_timeout(const struct max63xx_timeout *table, int value) > { > while (table->twd) { > if (value <= table->twd) { > @@ -202,14 +203,17 @@ static int max63xx_wdt_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > struct max63xx_wdt *wdt; > - struct max63xx_timeout *table; > + const struct max63xx_timeout *table; > int err; > > wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); > if (!wdt) > return -ENOMEM; > > - table = (struct max63xx_timeout *)pdev->id_entry->driver_data; > + /* Attempt to use fwnode first */ > + table = device_get_match_data(dev); > + if (!table) > + table = (struct max63xx_timeout *)pdev->id_entry->driver_data; > > if (heartbeat < 1 || heartbeat > MAX_HEARTBEAT) > heartbeat = DEFAULT_HEARTBEAT; > @@ -255,11 +259,23 @@ static const struct platform_device_id max63xx_id_table[] = { > }; > MODULE_DEVICE_TABLE(platform, max63xx_id_table); > > +static const struct of_device_id max63xx_dt_id_table[] = { > + { .compatible = "maxim,max6369", .data = max6369_table, }, > + { .compatible = "maxim,max6370", .data = max6369_table, }, > + { .compatible = "maxim,max6371", .data = max6371_table, }, > + { .compatible = "maxim,max6372", .data = max6371_table, }, > + { .compatible = "maxim,max6373", .data = max6373_table, }, > + { .compatible = "maxim,max6374", .data = max6373_table, }, > + { } > +}; > +MODULE_DEVICE_TABLE(of, max63xx_dt_id_table); > + > static struct platform_driver max63xx_wdt_driver = { > .probe = max63xx_wdt_probe, > .id_table = max63xx_id_table, > .driver = { > .name = "max63xx_wdt", > + .of_match_table = max63xx_dt_id_table, > }, > }; > > -- > 2.31.1 >
diff --git a/drivers/watchdog/max63xx_wdt.c b/drivers/watchdog/max63xx_wdt.c index 3a899628a834..9e1541cfae0d 100644 --- a/drivers/watchdog/max63xx_wdt.c +++ b/drivers/watchdog/max63xx_wdt.c @@ -26,6 +26,7 @@ #include <linux/spinlock.h> #include <linux/io.h> #include <linux/slab.h> +#include <linux/property.h> #define DEFAULT_HEARTBEAT 60 #define MAX_HEARTBEAT 60 @@ -99,8 +100,8 @@ static const struct max63xx_timeout max6373_table[] = { { }, }; -static struct max63xx_timeout * -max63xx_select_timeout(struct max63xx_timeout *table, int value) +static const struct max63xx_timeout * +max63xx_select_timeout(const struct max63xx_timeout *table, int value) { while (table->twd) { if (value <= table->twd) { @@ -202,14 +203,17 @@ static int max63xx_wdt_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct max63xx_wdt *wdt; - struct max63xx_timeout *table; + const struct max63xx_timeout *table; int err; wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); if (!wdt) return -ENOMEM; - table = (struct max63xx_timeout *)pdev->id_entry->driver_data; + /* Attempt to use fwnode first */ + table = device_get_match_data(dev); + if (!table) + table = (struct max63xx_timeout *)pdev->id_entry->driver_data; if (heartbeat < 1 || heartbeat > MAX_HEARTBEAT) heartbeat = DEFAULT_HEARTBEAT; @@ -255,11 +259,23 @@ static const struct platform_device_id max63xx_id_table[] = { }; MODULE_DEVICE_TABLE(platform, max63xx_id_table); +static const struct of_device_id max63xx_dt_id_table[] = { + { .compatible = "maxim,max6369", .data = max6369_table, }, + { .compatible = "maxim,max6370", .data = max6369_table, }, + { .compatible = "maxim,max6371", .data = max6371_table, }, + { .compatible = "maxim,max6372", .data = max6371_table, }, + { .compatible = "maxim,max6373", .data = max6373_table, }, + { .compatible = "maxim,max6374", .data = max6373_table, }, + { } +}; +MODULE_DEVICE_TABLE(of, max63xx_dt_id_table); + static struct platform_driver max63xx_wdt_driver = { .probe = max63xx_wdt_probe, .id_table = max63xx_id_table, .driver = { .name = "max63xx_wdt", + .of_match_table = max63xx_dt_id_table, }, };
This adds device tree probing to the MAX63xx driver so it can be instantiated from the device tree. We use the generic fwnode-based method to get to the match data and clean up by constifying the functions as the match is indeed a const. Cc: Marc Zyngier <maz@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- drivers/watchdog/max63xx_wdt.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) -- 2.31.1