From: Linus Walleij <linus.walleij@linaro.org>
To: Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>
Cc: linux-watchdog@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Marc Zyngier <maz@kernel.org>
Subject: [PATCH 2/2] watchdog: max63xx_wdt: Add device tree probing
Date: Wed, 14 Jul 2021 17:33:14 +0200 [thread overview]
Message-ID: <20210714153314.1004147-2-linus.walleij@linaro.org> (raw)
In-Reply-To: <20210714153314.1004147-1-linus.walleij@linaro.org>
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(-)
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
next prev parent reply other threads:[~2021-07-14 15:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-14 15:33 [PATCH 1/2] dt-bindings: watchdog: Add Maxim MAX63xx bindings Linus Walleij
2021-07-14 15:33 ` Linus Walleij [this message]
2021-07-17 14:08 ` [PATCH 2/2] watchdog: max63xx_wdt: Add device tree probing Guenter Roeck
2021-07-16 19:27 ` [PATCH 1/2] dt-bindings: watchdog: Add Maxim MAX63xx bindings Rob Herring
2021-07-17 14:08 ` Guenter Roeck
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