Combine common code from rzg2l_cpg_assert() and rzg2l_cpg_deassert() into a
new __rzg2l_cpg_assert() helper to avoid code duplication. This reduces
maintenance effort and improves code clarity.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
 drivers/clk/renesas/rzg2l-cpg.c | 45 ++++++++++++---------------------
 1 file changed, 16 insertions(+), 29 deletions(-)

diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c
index b508823f9723..1c648c0baf7c 100644
--- a/drivers/clk/renesas/rzg2l-cpg.c
+++ b/drivers/clk/renesas/rzg2l-cpg.c
@@ -1638,8 +1638,8 @@ rzg2l_cpg_register_mod_clk(const struct rzg2l_mod_clk *mod,
 
 #define rcdev_to_priv(x)	container_of(x, struct rzg2l_cpg_priv, rcdev)
 
-static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
-			    unsigned long id)
+static int __rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
+			      unsigned long id, bool assert)
 {
 	struct rzg2l_cpg_priv *priv = rcdev_to_priv(rcdev);
 	const struct rzg2l_cpg_info *info = priv->info;
@@ -1647,9 +1647,13 @@ static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
 	u32 mask = BIT(info->resets[id].bit);
 	s8 monbit = info->resets[id].monbit;
 	u32 value = mask << 16;
+	int ret;
 
-	dev_dbg(rcdev->dev, "assert id:%ld offset:0x%x\n", id, CLK_RST_R(reg));
+	dev_dbg(rcdev->dev, "%s id:%ld offset:0x%x\n",
+		assert ? "assert" : "deassert", id, CLK_RST_R(reg));
 
+	if (!assert)
+		value |= mask;
 	writel(value, priv->base + CLK_RST_R(reg));
 
 	if (info->has_clk_mon_regs) {
@@ -1664,37 +1668,20 @@ static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
 	}
 
 	return readl_poll_timeout_atomic(priv->base + reg, value,
-					 value & mask, 10, 200);
+					 assert ? (value & mask) : !(value & mask),
+					 10, 200);
+}
+
+static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
+			    unsigned long id)
+{
+	return __rzg2l_cpg_assert(rcdev, id, true);
 }
 
 static int rzg2l_cpg_deassert(struct reset_controller_dev *rcdev,
 			      unsigned long id)
 {
-	struct rzg2l_cpg_priv *priv = rcdev_to_priv(rcdev);
-	const struct rzg2l_cpg_info *info = priv->info;
-	unsigned int reg = info->resets[id].off;
-	u32 mask = BIT(info->resets[id].bit);
-	s8 monbit = info->resets[id].monbit;
-	u32 value = (mask << 16) | mask;
-
-	dev_dbg(rcdev->dev, "deassert id:%ld offset:0x%x\n", id,
-		CLK_RST_R(reg));
-
-	writel(value, priv->base + CLK_RST_R(reg));
-
-	if (info->has_clk_mon_regs) {
-		reg = CLK_MRST_R(reg);
-	} else if (monbit >= 0) {
-		reg = CPG_RST_MON;
-		mask = BIT(monbit);
-	} else {
-		/* Wait for at least one cycle of the RCLK clock (@ ca. 32 kHz) */
-		udelay(35);
-		return 0;
-	}
-
-	return readl_poll_timeout_atomic(priv->base + reg, value,
-					 !(value & mask), 10, 200);
+	return __rzg2l_cpg_assert(rcdev, id, false);
 }
 
 static int rzg2l_cpg_reset(struct reset_controller_dev *rcdev,
-- 
2.43.0

Hi Tommaso,

On Wed, 20 Aug 2025 at 12:05, Tommaso Merciai
<tommaso.merciai.xr@bp.renesas.com> wrote:
> Combine common code from rzg2l_cpg_assert() and rzg2l_cpg_deassert() into a
> new __rzg2l_cpg_assert() helper to avoid code duplication. This reduces
> maintenance effort and improves code clarity.
>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>

Thanks for your patch!

> --- a/drivers/clk/renesas/rzg2l-cpg.c
> +++ b/drivers/clk/renesas/rzg2l-cpg.c

> @@ -1664,37 +1668,20 @@ static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
>         }
>
>         return readl_poll_timeout_atomic(priv->base + reg, value,
> -                                        value & mask, 10, 200);
> +                                        assert ? (value & mask) : !(value & mask),

This can be simplified to "assert == !!(value & mask)".
Do you like that?

> +                                        10, 200);
> +}

The rest LGTM, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Hi Geert,
Thanks for your review!

On Tue, Sep 02, 2025 at 02:12:50PM +0200, Geert Uytterhoeven wrote:
> Hi Tommaso,
> 
> On Wed, 20 Aug 2025 at 12:05, Tommaso Merciai
> <tommaso.merciai.xr@bp.renesas.com> wrote:
> > Combine common code from rzg2l_cpg_assert() and rzg2l_cpg_deassert() into a
> > new __rzg2l_cpg_assert() helper to avoid code duplication. This reduces
> > maintenance effort and improves code clarity.
> >
> > Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
> 
> Thanks for your patch!
> 
> > --- a/drivers/clk/renesas/rzg2l-cpg.c
> > +++ b/drivers/clk/renesas/rzg2l-cpg.c
> 
> > @@ -1664,37 +1668,20 @@ static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev,
> >         }
> >
> >         return readl_poll_timeout_atomic(priv->base + reg, value,
> > -                                        value & mask, 10, 200);
> > +                                        assert ? (value & mask) : !(value & mask),
> 
> This can be simplified to "assert == !!(value & mask)".
> Do you like that?

Yes, thanks.
Looks good to me.

Thanks & Regards,
Tommaso

> 
> > +                                        10, 200);
> > +}
> 
> The rest LGTM, so
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> -- 
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds