linux-kernel - [PATCH v4 2/3] pinctrl: mediatek: modify the method of obtaining eint address

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Message-ID: <20250225140732.21557-3-ot_chhao.chang@mediatek.com>
Date: Tue, 25 Feb 2025 22:07:23 +0800
From: Hao Chang <ot_chhao.chang@...iatek.com>
To: Sean Wang <sean.wang@...nel.org>, Linus Walleij
	<linus.walleij@...aro.org>, Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
CC: Wenbin Mei <wenbin.mei@...iatek.com>, Axe Yang <axe.yang@...iatek.com>,
	Qingliang Li <qingliang.li@...iatek.com>, Hanks Chen
	<hanks.chen@...iatek.com>, Chunhui Li <chunhui.li@...iatek.com>,
	<linux-mediatek@...ts.infradead.org>, <linux-gpio@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, Hao
 Chang <ot_chhao.chang@...iatek.com>
Subject: [PATCH v4 2/3] pinctrl: mediatek: modify the method of obtaining eint address

Increase nbase for address counting and pin number for calculating
pin count on address.

Signed-off-by: Hao Chang <ot_chhao.chang@...iatek.com>
Signed-off-by: Qingliang Li <qingliang.li@...iatek.com>
---
 drivers/pinctrl/mediatek/mtk-eint.h           |  4 +-
 .../pinctrl/mediatek/pinctrl-mtk-common-v2.c  | 49 ++++++++++++++-----
 2 files changed, 40 insertions(+), 13 deletions(-)

diff --git a/drivers/pinctrl/mediatek/mtk-eint.h b/drivers/pinctrl/mediatek/mtk-eint.h
index 44360d97a34a..c1efdf02fb49 100644
--- a/drivers/pinctrl/mediatek/mtk-eint.h
+++ b/drivers/pinctrl/mediatek/mtk-eint.h
@@ -64,7 +64,9 @@ struct mtk_eint_xt {
 
 struct mtk_eint {
 	struct device *dev;
-	void __iomem *base;
+	void __iomem **base;
+	u8 nbase;
+	u16 *base_pin_num;
 	struct irq_domain *domain;
 	int irq;
 
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 00e95682b9f8..9e87dddafb12 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -13,6 +13,7 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/module.h>
+#include <linux/of_address.h>
 #include <linux/of_irq.h>
 
 #include "mtk-eint.h"
@@ -367,21 +368,40 @@ static const struct mtk_eint_xt mtk_eint_xt = {
 int mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	int ret;
+	int ret, i, j, count_reg_names;
 
 	if (!IS_ENABLED(CONFIG_EINT_MTK))
 		return 0;
 
-	if (!of_property_read_bool(np, "interrupt-controller"))
+	if (!hw->soc->eint_hw)
 		return -ENODEV;
 
-	hw->eint = devm_kzalloc(hw->dev, sizeof(*hw->eint), GFP_KERNEL);
+	count_reg_names = of_property_count_strings(np, "reg-names");
+	if (count_reg_names < hw->soc->nbase_names)
+		return -EINVAL;
+
+	hw->eint = devm_kmalloc(hw->dev, sizeof(*hw->eint), GFP_KERNEL);
 	if (!hw->eint)
 		return -ENOMEM;
 
-	hw->eint->base = devm_platform_ioremap_resource_byname(pdev, "eint");
-	if (IS_ERR(hw->eint->base)) {
-		ret = PTR_ERR(hw->eint->base);
+	hw->eint->nbase = count_reg_names - hw->soc->nbase_names;
+	hw->eint->base = devm_kmalloc_array(&pdev->dev, hw->eint->nbase,
+					    sizeof(*hw->eint->base), GFP_KERNEL | __GFP_ZERO);
+	if (!hw->eint->base) {
+		ret = -ENOMEM;
+		goto err_free_base;
+	}
+
+	for (i = hw->soc->nbase_names, j = 0; i < count_reg_names; i++, j++) {
+		hw->eint->base[j] = of_iomap(np, i);
+		if (IS_ERR(hw->eint->base[j])) {
+			ret = PTR_ERR(hw->eint->base[j]);
+			goto err_free_eint;
+		}
+	}
+
+	if (!of_property_read_bool(np, "interrupt-controller")) {
+		ret = -ENODEV;
 		goto err_free_eint;
 	}
 
@@ -391,19 +411,24 @@ int mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev)
 		goto err_free_eint;
 	}
 
-	if (!hw->soc->eint_hw) {
-		ret = -ENODEV;
-		goto err_free_eint;
-	}
-
 	hw->eint->dev = &pdev->dev;
 	hw->eint->hw = hw->soc->eint_hw;
 	hw->eint->pctl = hw;
 	hw->eint->gpio_xlate = &mtk_eint_xt;
 
-	return mtk_eint_do_init(hw->eint);
+	ret = mtk_eint_do_init(hw->eint);
+	if (ret)
+		goto err_free_eint;
+
+	return 0;
 
 err_free_eint:
+	for (j = 0; j < hw->eint->nbase; j++) {
+		if (hw->eint->base[j])
+			iounmap(hw->eint->base[j]);
+	}
+	devm_kfree(hw->dev, hw->eint->base);
+err_free_base:
 	devm_kfree(hw->dev, hw->eint);
 	hw->eint = NULL;
 	return ret;
-- 
2.46.0