linux-kernel - [PATCH 3/3] pinctrl: ingenic: Add .max_register in regmap

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Date:   Sat, 17 Jul 2021 18:48:36 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     周琰杰 <zhouyanjie@...yeetech.com>,
        linux-mips@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 3/3] pinctrl: ingenic: Add .max_register in regmap_config

Compute the max register from the GPIO chip offset and number of GPIO
chips.

This permits to read all registers from debugfs.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/pinctrl/pinctrl-ingenic.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-ingenic.c b/drivers/pinctrl/pinctrl-ingenic.c
index 263498be8e31..2bbcb8063a16 100644
--- a/drivers/pinctrl/pinctrl-ingenic.c
+++ b/drivers/pinctrl/pinctrl-ingenic.c
@@ -3759,6 +3759,7 @@ static int __init ingenic_pinctrl_probe(struct platform_device *pdev)
 	void __iomem *base;
 	const struct ingenic_chip_info *chip_info;
 	struct device_node *node;
+	struct regmap_config regmap_config;
 	unsigned int i;
 	int err;
 
@@ -3776,8 +3777,10 @@ static int __init ingenic_pinctrl_probe(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	jzpc->map = devm_regmap_init_mmio(dev, base,
-			&ingenic_pinctrl_regmap_config);
+	regmap_config = ingenic_pinctrl_regmap_config;
+	regmap_config.max_register = chip_info->num_chips * chip_info->reg_offset;
+
+	jzpc->map = devm_regmap_init_mmio(dev, base, &regmap_config);
 	if (IS_ERR(jzpc->map)) {
 		dev_err(dev, "Failed to create regmap\n");
 		return PTR_ERR(jzpc->map);
-- 
2.30.2