linux-kernel - [PATCH V2 2/4] watchdog: Add a new struct for Amlogic-GXBB driver

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Message-ID: <20230802033222.4024946-3-huqiang.qin@amlogic.com>
Date:   Wed, 2 Aug 2023 11:32:20 +0800
From:   Huqiang Qin <huqiang.qin@...ogic.com>
To:     <wim@...ux-watchdog.org>, <linux@...ck-us.net>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <neil.armstrong@...aro.org>,
        <khilman@...libre.com>, <jbrunet@...libre.com>,
        <martin.blumenstingl@...glemail.com>
CC:     <linux-watchdog@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-amlogic@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Huqiang Qin <huqiang.qin@...ogic.com>
Subject: [PATCH V2 2/4] watchdog: Add a new struct for Amlogic-GXBB driver

Add a new structure wdt_params to describe the watchdog difference
of different chips.

Signed-off-by: Huqiang Qin <huqiang.qin@...ogic.com>
---

V1 -> V2: Rename rst_shift to rst and use the BIT() macro to build
          its initial value.

 drivers/watchdog/meson_gxbb_wdt.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/watchdog/meson_gxbb_wdt.c b/drivers/watchdog/meson_gxbb_wdt.c
index 35d80cb39856..18180d91543e 100644
--- a/drivers/watchdog/meson_gxbb_wdt.c
+++ b/drivers/watchdog/meson_gxbb_wdt.c
@@ -22,7 +22,6 @@
 
 #define GXBB_WDT_CTRL_CLKDIV_EN			BIT(25)
 #define GXBB_WDT_CTRL_CLK_EN			BIT(24)
-#define GXBB_WDT_CTRL_EE_RESET			BIT(21)
 #define GXBB_WDT_CTRL_EN			BIT(18)
 #define GXBB_WDT_CTRL_DIV_MASK			(BIT(18) - 1)
 
@@ -45,6 +44,10 @@ struct meson_gxbb_wdt {
 	struct clk *clk;
 };
 
+struct wdt_params {
+	u32 rst;
+};
+
 static int meson_gxbb_wdt_start(struct watchdog_device *wdt_dev)
 {
 	struct meson_gxbb_wdt *data = watchdog_get_drvdata(wdt_dev);
@@ -140,8 +143,12 @@ static const struct dev_pm_ops meson_gxbb_wdt_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(meson_gxbb_wdt_suspend, meson_gxbb_wdt_resume)
 };
 
+static const struct wdt_params gxbb_params = {
+	.rst = BIT(21),
+};
+
 static const struct of_device_id meson_gxbb_wdt_dt_ids[] = {
-	 { .compatible = "amlogic,meson-gxbb-wdt", },
+	 { .compatible = "amlogic,meson-gxbb-wdt", .data = &gxbb_params, },
 	 { /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, meson_gxbb_wdt_dt_ids);
@@ -150,6 +157,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct meson_gxbb_wdt *data;
+	struct wdt_params *params;
 	u32 ctrl_reg;
 
 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
@@ -164,6 +172,8 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(data->clk))
 		return PTR_ERR(data->clk);
 
+	params = (struct wdt_params *)of_device_get_match_data(dev);
+
 	platform_set_drvdata(pdev, data);
 
 	data->wdt_dev.parent = dev;
@@ -191,7 +201,7 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
 	/* Setup with 1ms timebase */
 	ctrl_reg |= ((clk_get_rate(data->clk) / 1000) &
 			GXBB_WDT_CTRL_DIV_MASK) |
-			GXBB_WDT_CTRL_EE_RESET |
+			params->rst |
 			GXBB_WDT_CTRL_CLK_EN |
 			GXBB_WDT_CTRL_CLKDIV_EN;
 
-- 
2.37.1