linux-kernel - [RFC 06/11] soc: realtek: chip: Detect RTD1296

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Message-Id: <20191103013645.9856-7-afaerber@suse.de>
Date:   Sun,  3 Nov 2019 02:36:40 +0100
From:   Andreas Färber <afaerber@...e.de>
To:     linux-realtek-soc@...ts.infradead.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Andreas Färber <afaerber@...e.de>
Subject: [RFC 06/11] soc: realtek: chip: Detect RTD1296

Detection logic from downstream drivers/soc/realtek/rtd129x/rtk_chip.c.

Signed-off-by: Andreas Färber <afaerber@...e.de>
---
 drivers/soc/realtek/chip.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/realtek/chip.c b/drivers/soc/realtek/chip.c
index 9d13422e9936..ba653c097644 100644
--- a/drivers/soc/realtek/chip.c
+++ b/drivers/soc/realtek/chip.c
@@ -50,9 +50,25 @@ static const char *default_name(struct device *dev, const struct rtd_soc *s)
 	return s->family;
 }
 
+static const char *rtd1295_name(struct device *dev, const struct rtd_soc *s)
+{
+	void __iomem *base;
+
+	base = of_iomap(dev->of_node, 1);
+	if (base) {
+		u32 chipinfo1 = readl_relaxed(base);
+		iounmap(base);
+		if (chipinfo1 & BIT(11)) {
+			return "RTD1296";
+		}
+	}
+
+	return "RTD1295";
+}
+
 static const struct rtd_soc rtd_soc_families[] = {
 	{ 0x00006329, "RTD1195", default_name, rtd1195_revisions, "Phoenix" },
-	{ 0x00006421, "RTD1295", default_name, rtd1295_revisions, "Kylin" },
+	{ 0x00006421, "RTD1295", rtd1295_name, rtd1295_revisions, "Kylin" },
 };
 
 static const struct rtd_soc *rtd_soc_by_chip_id(u32 chip_id)
-- 
2.16.4