[PATCH v2 03/21] ipmi: kcs: aspeed: Adapt to new LPC DTS layout

Andrew Jeffery
2021-03-19T06:27:34Z

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>
Acked-by: Haiyue Wang <haiyue.wang@linux.intel.com>
---
drivers/char/ipmi/kcs_bmc_aspeed.c | 27 ++++++++++++++++-----------
1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
index a140203c079b..eefe362f65f0 100644
--- a/drivers/char/ipmi/kcs_bmc_aspeed.c
+++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
@@ -27,7 +27,6 @@

#define KCS_CHANNEL_MAX 4

-/* mapped to lpc-bmc at 0 IO space */
#define LPC_HICR0 0x000
#define LPC_HICR0_LPC3E BIT(7)
#define LPC_HICR0_LPC2E BIT(6)
@@ -52,15 +51,13 @@
#define LPC_STR1 0x03C
#define LPC_STR2 0x040
#define LPC_STR3 0x044
-
-/* mapped to lpc-host at 80 IO space */
-#define LPC_HICRB 0x080
+#define LPC_HICRB 0x100
#define LPC_HICRB_IBFIF4 BIT(1)
#define LPC_HICRB_LPC4E BIT(0)
-#define LPC_LADR4 0x090
-#define LPC_IDR4 0x094
-#define LPC_ODR4 0x098
-#define LPC_STR4 0x09C
+#define LPC_LADR4 0x110
+#define LPC_IDR4 0x114
+#define LPC_ODR4 0x118
+#define LPC_STR4 0x11C

struct aspeed_kcs_bmc {
struct regmap *map;
@@ -348,12 +345,20 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
struct device_node *np;
int rc;

- np = pdev->dev.of_node;
+ np = dev->of_node->parent;
+ if (!of_device_is_compatible(np, "aspeed,ast2400-lpc-v2") &&
+ !of_device_is_compatible(np, "aspeed,ast2500-lpc-v2") &&
+ !of_device_is_compatible(np, "aspeed,ast2600-lpc-v2")) {
+ dev_err(dev, "unsupported LPC device binding\n");
+ return -ENODEV;
+ }
+
+ np = dev->of_node;
if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc") ||
- of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc"))
+ of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc"))
kcs_bmc = aspeed_kcs_probe_of_v1(pdev);
else if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc-v2") ||
- of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc-v2"))
+ of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc-v2"))
kcs_bmc = aspeed_kcs_probe_of_v2(pdev);
else
return -EINVAL;
--
2.27.0