linux-kernel - [PATCH v2 20/31] fsi: aspeed: Disable relative addressing and IPOLL for cfam reset

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Date: Mon, 26 Feb 2024 10:53:10 -0600
From: Eddie James <eajames@...ux.ibm.com>
To: linux-fsi@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, andi.shyti@...nel.org,
        eajames@...ux.ibm.com, alistair@...ple.id.au, joel@....id.au,
        jk@...abs.org, robh@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, lakshmiy@...ibmcom
Subject: [PATCH v2 20/31] fsi: aspeed: Disable relative addressing and IPOLL for cfam reset

Need to disable these for the master reset after cfam reset.

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 drivers/fsi/fsi-master-aspeed.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
index 1cb5bf6c05d2..92b47bc9917a 100644
--- a/drivers/fsi/fsi-master-aspeed.c
+++ b/drivers/fsi/fsi-master-aspeed.c
@@ -375,11 +375,18 @@ static ssize_t cfam_reset_store(struct device *dev, struct device_attribute *att
 
 	trace_fsi_master_aspeed_cfam_reset(true);
 	spin_lock_irqsave(&aspeed->lock, flags);
+
+	opb_writel(aspeed, ctrl_base + FSI_MMODE,
+		   cpu_to_be32(aspeed->master.mmode & ~(FSI_MMODE_EIP | FSI_MMODE_RELA)));
+
 	gpiod_set_value(aspeed->cfam_reset_gpio, 1);
 	udelay(900);
 	gpiod_set_value(aspeed->cfam_reset_gpio, 0);
 	udelay(900);
+
 	opb_writel(aspeed, ctrl_base + FSI_MRESP0, cpu_to_be32(FSI_MRESP_RST_ALL_MASTER));
+	opb_writel(aspeed, ctrl_base + FSI_MMODE, cpu_to_be32(aspeed->master.mmode));
+
 	spin_unlock_irqrestore(&aspeed->lock, flags);
 	trace_fsi_master_aspeed_cfam_reset(false);
 
-- 
2.39.3