[PATCH v8 08/26] watchdog: jz4740: Use regmap provided by TCU driver

[Paul Cercueil]

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 <p...@crapouillou.net>
Reviewed-by: Guenter Roeck <li...@roeck-us.net>
---

Notes:
     v6: New patch
    
     v7: No change

     v8: No change

 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