Thread (24 messages) 24 messages, 6 authors, 2021-02-17
STALE1938d
Revisions (5)
  1. v1 [diff vs current]
  2. v2 [diff vs current]
  3. v3 [diff vs current]
  4. v4 [diff vs current]
  5. v5 current

[PATCH v5 4/5] pinctrl: aspeed-g5: Adapt to new LPC device tree layout

From: Chia-Wei, Wang <hidden>
Date: 2021-01-14 13:17:29
Also in: linux-arm-kernel, linux-aspeed, lkml, openbmc
Subsystem: aspeed pinctrl drivers, pin control subsystem, the rest · Maintainers: Andrew Jeffery, Linus Walleij, Linus Torvalds

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 <redacted>
---
 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
-- 
2.17.1
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help