[”PATCH” 5/5] PCI: armada8k: add device reset to link-down handle
bpeled at marvell.com
bpeled at marvell.com
Mon Apr 12 16:30:56 BST 2021
From: Ben Peled <bpeled at marvell.com>
Added pcie reset via gpio support as described in the
designware-pcie.txt DT binding document.
In cases link down cause still exist in device.
The device need to be reset to reestablish the link.
If reset-gpio pin provided in the device tree, then the linkdown
handle resets the device before reestablishing link.
Signed-off-by: Ben Peled <bpeled at marvell.com>
---
drivers/pci/controller/dwc/pcie-armada8k.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-armada8k.c b/drivers/pci/controller/dwc/pcie-armada8k.c
index 4eb8607..83ac91e 100644
--- a/drivers/pci/controller/dwc/pcie-armada8k.c
+++ b/drivers/pci/controller/dwc/pcie-armada8k.c
@@ -24,6 +24,7 @@
#include <linux/of_irq.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
+#include <linux/of_gpio.h>
#include "pcie-designware.h"
@@ -38,6 +39,7 @@ struct armada8k_pcie {
struct regmap *sysctrl_base;
u32 mac_rest_bitmask;
struct work_struct recover_link_work;
+ enum of_gpio_flags flags;
};
#define PCIE_VENDOR_REGS_OFFSET 0x8000
--
2.7.4
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