[PATCH v11 08/27] watchdog: jz4740: Use regmap provided by TCU driver

From: Paul Cercueil
Date: Wed Mar 27 2019 - 19:17:20 EST


Since we broke the ABI by changing the clock, the driver was also
updated to use the regmap provided by the TCU driver.

Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Tested-by: Mathieu Malaterre <malat@xxxxxxxxxx>
Tested-by: Artur Rojek <contact@xxxxxxxxxxxxxx>
---
drivers/watchdog/jz4740_wdt.c | 30 ++++++++++++++----------------
1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/watchdog/jz4740_wdt.c b/drivers/watchdog/jz4740_wdt.c
index 1d504ecf45e1..0f54306aee25 100644
--- a/drivers/watchdog/jz4740_wdt.c
+++ b/drivers/watchdog/jz4740_wdt.c
@@ -13,6 +13,7 @@
*
*/

+#include <linux/mfd/ingenic-tcu.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
@@ -25,10 +26,7 @@
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
-
-#define JZ_REG_WDT_TIMER_DATA 0x0
-#define JZ_REG_WDT_COUNTER_ENABLE 0x4
-#define JZ_REG_WDT_TIMER_COUNTER 0x8
+#include <linux/regmap.h>

#define DEFAULT_HEARTBEAT 5
#define MAX_HEARTBEAT 2048
@@ -48,7 +46,7 @@ MODULE_PARM_DESC(heartbeat,

struct jz4740_wdt_drvdata {
struct watchdog_device wdt;
- void __iomem *base;
+ struct regmap *map;
struct clk *clk;
unsigned long clk_rate;
};
@@ -57,7 +55,7 @@ static int jz4740_wdt_ping(struct watchdog_device *wdt_dev)
{
struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev);

- writew(0x0, drvdata->base + JZ_REG_WDT_TIMER_COUNTER);
+ regmap_write(drvdata->map, TCU_REG_WDT_TCNT, 0);
return 0;
}

@@ -67,12 +65,12 @@ static int jz4740_wdt_set_timeout(struct watchdog_device *wdt_dev,
struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev);
u16 timeout_value = (u16)(drvdata->clk_rate * new_timeout);

- writeb(0x0, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE);
+ regmap_write(drvdata->map, TCU_REG_WDT_TCER, 0);

- writew((u16)timeout_value, drvdata->base + JZ_REG_WDT_TIMER_DATA);
- writew(0x0, drvdata->base + JZ_REG_WDT_TIMER_COUNTER);
+ regmap_write(drvdata->map, TCU_REG_WDT_TDR, timeout_value);
+ regmap_write(drvdata->map, TCU_REG_WDT_TCNT, 0);

- writeb(0x1, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE);
+ regmap_write(drvdata->map, TCU_REG_WDT_TCER, TCU_WDT_TCER_TCEN);

wdt_dev->timeout = new_timeout;
return 0;
@@ -96,7 +94,7 @@ static int jz4740_wdt_stop(struct watchdog_device *wdt_dev)
{
struct jz4740_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev);

- writeb(0x0, drvdata->base + JZ_REG_WDT_COUNTER_ENABLE);
+ regmap_write(drvdata->map, TCU_REG_WDT_TCER, 0);
clk_disable_unprepare(drvdata->clk);

return 0;
@@ -138,7 +136,6 @@ static int jz4740_wdt_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct jz4740_wdt_drvdata *drvdata;
struct watchdog_device *jz4740_wdt;
- struct resource *res;
long rate;
int ret;

@@ -174,10 +171,11 @@ static int jz4740_wdt_probe(struct platform_device *pdev)
watchdog_set_nowayout(jz4740_wdt, nowayout);
watchdog_set_drvdata(jz4740_wdt, drvdata);

- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- drvdata->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(drvdata->base))
- return PTR_ERR(drvdata->base);
+ drvdata->map = dev_get_regmap(dev->parent, NULL);
+ if (!drvdata->map) {
+ dev_err(dev, "regmap not found\n");
+ return -EINVAL;
+ }

ret = devm_watchdog_register_device(&pdev->dev, &drvdata->wdt);
if (ret < 0)
--
2.11.0