linux-kernel - [PATCH v2 04/11] pinctrl: renesas: rzg2l: Add pin configuration support for pinmux groups

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Message-Id: <20231207070700.4156557-5-claudiu.beznea.uj@bp.renesas.com>
Date:   Thu,  7 Dec 2023 09:06:53 +0200
From:   Claudiu <claudiu.beznea@...on.dev>
To:     s.shtylyov@....ru, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        geert+renesas@...der.be, magnus.damm@...il.com,
        mturquette@...libre.com, sboyd@...nel.org,
        linus.walleij@...aro.org, prabhakar.mahadev-lad.rj@...renesas.com,
        biju.das.jz@...renesas.com
Cc:     linux-renesas-soc@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: [PATCH v2 04/11] pinctrl: renesas: rzg2l: Add pin configuration support for pinmux groups

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

On RZ/G3S different Ethernet pins need to be configured with different
settings (e.g., power-source needs to be set, RGMII TXC and TX_CTL pins
need output-enable). Commit adjust driver to allow specifying pin
configuration for pinmux groups. With this, DT settings like the following
are taken into account by driver:

eth0_pins: eth0 {
	tx_ctl {
		pinmux = <RZG2L_PORT_PINMUX(1, 1, 1)>;  /* ET0_TX_CTL */
		power-source = <1800>;
		output-enable;
		drive-strength-microamp = <5200>;
	};
};

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
---

Changes in v2:
- moved num_configs check under num_pinmux check as suggested
- collected Rb tag

 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 2eb240b731d5..58786455ecf3 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -376,8 +376,11 @@ static int rzg2l_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 		goto done;
 	}
 
-	if (num_pinmux)
+	if (num_pinmux) {
+		if (num_configs)
+			nmaps += 1;
 		nmaps += 1;
+	}
 
 	if (num_pins)
 		nmaps += num_pins;
@@ -462,6 +465,16 @@ static int rzg2l_dt_subnode_to_map(struct pinctrl_dev *pctldev,
 	maps[idx].data.mux.function = name;
 	idx++;
 
+	if (num_configs) {
+		ret = rzg2l_map_add_config(&maps[idx], name,
+					   PIN_MAP_TYPE_CONFIGS_GROUP,
+					   configs, num_configs);
+		if (ret < 0)
+			goto remove_group;
+
+		idx++;
+	};
+
 	dev_dbg(pctrl->dev, "Parsed %pOF with %d pins\n", np, num_pinmux);
 	ret = 0;
 	goto done;
-- 
2.39.2