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From 47e5da763d58a3b6657e2a716130a470e1deee2f Mon Sep 17 00:00:00 2001
From: Scott B <28817345+foundObjects@users.noreply.github.com>
Date: Wed, 25 Aug 2021 07:35:52 -0700
Subject: [PATCH] amd-pmc delay test
---
drivers/platform/x86/amd-pmc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/amd-pmc.c b/drivers/platform/x86/amd-pmc.c
index 52a88c9bc0ab..336303e963c5 100644
--- a/drivers/platform/x86/amd-pmc.c
+++ b/drivers/platform/x86/amd-pmc.c
@@ -71,7 +71,7 @@
#define AMD_CPU_ID_YC 0x14B5
#define PMC_MSG_DELAY_MIN_US 100
-#define RESPONSE_REGISTER_LOOP_MAX 200
+#define RESPONSE_REGISTER_LOOP_MAX 2000
#define SOC_SUBSYSTEM_IP_MAX 12
#define DELAY_MIN_US 2000
@@ -283,12 +283,18 @@ static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, bool set, u32 *data, u8 msg
/* Write zero to response register */
amd_pmc_reg_write(dev, AMD_PMC_REGISTER_RESPONSE, 0);
+ udelay(500);
+
/* Write argument into response register */
amd_pmc_reg_write(dev, AMD_PMC_REGISTER_ARGUMENT, set);
+ udelay(500);
+
/* Write message ID to message ID register */
amd_pmc_reg_write(dev, AMD_PMC_REGISTER_MESSAGE, msg);
+ udelay(500);
+
/* Wait until we get a valid response */
rc = readx_poll_timeout(ioread32, dev->regbase + AMD_PMC_REGISTER_RESPONSE,
val, val != 0, PMC_MSG_DELAY_MIN_US,
--
2.33.0
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