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From:   Andrew Jeffery <andrew@aj.id.au>
To:     openipmi-developer@lists.sourceforge.net, openbmc@lists.ozlabs.org,
        minyard@acm.org
Cc:     "Chia-Wei, Wang" <chiawei_wang@aspeedtech.com>, robh+dt@kernel.org,
        joel@jms.id.au, lee.jones@linaro.org, avifishman70@gmail.com,
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        yuenn@google.com, benjaminfair@google.com,
        linus.walleij@linaro.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-aspeed@lists.ozlabs.org, linux-gpio@vger.kernel.org
Subject: [PATCH 04/19] pinctrl: aspeed-g5: Adapt to new LPC device tree layout
Date:   Sat, 20 Feb 2021 00:55:08 +1030
Message-Id: <20210219142523.3464540-5-andrew@aj.id.au>
In-Reply-To: <20210219142523.3464540-1-andrew@aj.id.au>
References: <20210219142523.3464540-1-andrew@aj.id.au>
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From: "Chia-Wei, Wang" <chiawei_wang@aspeedtech.com>

Add check against LPC device v2 compatible string to
ensure that the fixed device tree layout is adopted.
The LPC register offsets are also fixed accordingly.

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Tested-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c
index 0cab4c2576e2..996ebcba4d38 100644
--- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c
+++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c
@@ -60,7 +60,7 @@
 #define COND2		{ ASPEED_IP_SCU, SCU94, GENMASK(1, 0), 0, 0 }
 
 /* LHCR0 is offset from the end of the H8S/2168-compatible registers */
-#define LHCR0		0x20
+#define LHCR0		0xa0
 #define GFX064		0x64
 
 #define B14 0
@@ -2648,14 +2648,19 @@ static struct regmap *aspeed_g5_acquire_regmap(struct aspeed_pinmux_data *ctx,
 	}
 
 	if (ip == ASPEED_IP_LPC) {
-		struct device_node *node;
+		struct device_node *np;
 		struct regmap *map;
 
-		node = of_parse_phandle(ctx->dev->of_node,
+		np = of_parse_phandle(ctx->dev->of_node,
 					"aspeed,external-nodes", 1);
-		if (node) {
-			map = syscon_node_to_regmap(node->parent);
-			of_node_put(node);
+		if (np) {
+			if (!of_device_is_compatible(np->parent, "aspeed,ast2400-lpc-v2") &&
+			    !of_device_is_compatible(np->parent, "aspeed,ast2500-lpc-v2") &&
+			    !of_device_is_compatible(np->parent, "aspeed,ast2600-lpc-v2"))
+				return ERR_PTR(-ENODEV);
+
+			map = syscon_node_to_regmap(np->parent);
+			of_node_put(np);
 			if (IS_ERR(map))
 				return map;
 		} else
-- 
2.27.0