| Message ID | 20240410134044.2138310-8-claudiu.beznea.uj@bp.renesas.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | watchdog: rzg2l_wdt: Add support for RZ/G3S | expand |
On Wed, Apr 10, 2024 at 04:40:41PM +0300, Claudiu wrote: > From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> > > The reset driver has been adapted in commit da235d2fac21 > ("clk: renesas: rzg2l: Check reset monitor registers") to check the reset > monitor bits before declaring reset asserts/de-asserts as > successful/failure operations. With that, there is no need to keep the > reset workaround for RZ/V2M in place in the watchdog driver. > > Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> > Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > > Changes in v8: > - none > > Changes in v7: > - none > > Changes in v6: > - none > > Changes in v5: > - none > > Changes in v4: > - collected tag > > Changes in v3: > - none > > Changes in v2: > - none > > drivers/watchdog/rzg2l_wdt.c | 39 ++++-------------------------------- > 1 file changed, 4 insertions(+), 35 deletions(-) > > diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c > index 29eb47bcf984..42f1d5d6f07e 100644 > --- a/drivers/watchdog/rzg2l_wdt.c > +++ b/drivers/watchdog/rzg2l_wdt.c > @@ -8,7 +8,6 @@ > #include <linux/clk.h> > #include <linux/delay.h> > #include <linux/io.h> > -#include <linux/iopoll.h> > #include <linux/kernel.h> > #include <linux/module.h> > #include <linux/of.h> > @@ -54,35 +53,11 @@ struct rzg2l_wdt_priv { > struct reset_control *rstc; > unsigned long osc_clk_rate; > unsigned long delay; > - unsigned long minimum_assertion_period; > struct clk *pclk; > struct clk *osc_clk; > enum rz_wdt_type devtype; > }; > > -static int rzg2l_wdt_reset(struct rzg2l_wdt_priv *priv) > -{ > - int err, status; > - > - if (priv->devtype == WDT_RZV2M) { > - /* WDT needs TYPE-B reset control */ > - err = reset_control_assert(priv->rstc); > - if (err) > - return err; > - ndelay(priv->minimum_assertion_period); > - err = reset_control_deassert(priv->rstc); > - if (err) > - return err; > - err = read_poll_timeout(reset_control_status, status, > - status != 1, 0, 1000, false, > - priv->rstc); > - } else { > - err = reset_control_reset(priv->rstc); > - } > - > - return err; > -} > - > static void rzg2l_wdt_wait_delay(struct rzg2l_wdt_priv *priv) > { > /* delay timer when change the setting register */ > @@ -187,13 +162,12 @@ static int rzg2l_wdt_restart(struct watchdog_device *wdev, > unsigned long action, void *data) > { > struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev); > + int ret; > > clk_prepare_enable(priv->pclk); > clk_prepare_enable(priv->osc_clk); > > if (priv->devtype == WDT_RZG2L) { > - int ret; > - > ret = reset_control_deassert(priv->rstc); > if (ret) > return ret; > @@ -205,7 +179,9 @@ static int rzg2l_wdt_restart(struct watchdog_device *wdev, > rzg2l_wdt_write(priv, PEEN_FORCE, PEEN); > } else { > /* RZ/V2M doesn't have parity error registers */ > - rzg2l_wdt_reset(priv); > + ret = reset_control_reset(priv->rstc); > + if (ret) > + return ret; > > wdev->timeout = 0; > > @@ -297,13 +273,6 @@ static int rzg2l_wdt_probe(struct platform_device *pdev) > > priv->devtype = (uintptr_t)of_device_get_match_data(dev); > > - if (priv->devtype == WDT_RZV2M) { > - priv->minimum_assertion_period = RZV2M_A_NSEC + > - 3 * F2CYCLE_NSEC(pclk_rate) + 5 * > - max(F2CYCLE_NSEC(priv->osc_clk_rate), > - F2CYCLE_NSEC(pclk_rate)); > - } > - > pm_runtime_enable(&pdev->dev); > > priv->wdev.info = &rzg2l_wdt_ident; > -- > 2.39.2 >
diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c index 29eb47bcf984..42f1d5d6f07e 100644 --- a/drivers/watchdog/rzg2l_wdt.c +++ b/drivers/watchdog/rzg2l_wdt.c @@ -8,7 +8,6 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/io.h> -#include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> @@ -54,35 +53,11 @@ struct rzg2l_wdt_priv { struct reset_control *rstc; unsigned long osc_clk_rate; unsigned long delay; - unsigned long minimum_assertion_period; struct clk *pclk; struct clk *osc_clk; enum rz_wdt_type devtype; }; -static int rzg2l_wdt_reset(struct rzg2l_wdt_priv *priv) -{ - int err, status; - - if (priv->devtype == WDT_RZV2M) { - /* WDT needs TYPE-B reset control */ - err = reset_control_assert(priv->rstc); - if (err) - return err; - ndelay(priv->minimum_assertion_period); - err = reset_control_deassert(priv->rstc); - if (err) - return err; - err = read_poll_timeout(reset_control_status, status, - status != 1, 0, 1000, false, - priv->rstc); - } else { - err = reset_control_reset(priv->rstc); - } - - return err; -} - static void rzg2l_wdt_wait_delay(struct rzg2l_wdt_priv *priv) { /* delay timer when change the setting register */ @@ -187,13 +162,12 @@ static int rzg2l_wdt_restart(struct watchdog_device *wdev, unsigned long action, void *data) { struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev); + int ret; clk_prepare_enable(priv->pclk); clk_prepare_enable(priv->osc_clk); if (priv->devtype == WDT_RZG2L) { - int ret; - ret = reset_control_deassert(priv->rstc); if (ret) return ret; @@ -205,7 +179,9 @@ static int rzg2l_wdt_restart(struct watchdog_device *wdev, rzg2l_wdt_write(priv, PEEN_FORCE, PEEN); } else { /* RZ/V2M doesn't have parity error registers */ - rzg2l_wdt_reset(priv); + ret = reset_control_reset(priv->rstc); + if (ret) + return ret; wdev->timeout = 0; @@ -297,13 +273,6 @@ static int rzg2l_wdt_probe(struct platform_device *pdev) priv->devtype = (uintptr_t)of_device_get_match_data(dev); - if (priv->devtype == WDT_RZV2M) { - priv->minimum_assertion_period = RZV2M_A_NSEC + - 3 * F2CYCLE_NSEC(pclk_rate) + 5 * - max(F2CYCLE_NSEC(priv->osc_clk_rate), - F2CYCLE_NSEC(pclk_rate)); - } - pm_runtime_enable(&pdev->dev); priv->wdev.info = &rzg2l_wdt_ident;