lkml.org 
[lkml]   [2019]   [Dec]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 06/13] PCI: cadence: Allow pci_host_bridge to have custom pci_ops
Date
Certain platforms like TI's J721E allows only 32-bit configuration
space access. In such cases pci_generic_config_read and
pci_generic_config_write cannot be used. Add support in Cadence core
to let pci_host_bridge have custom pci_ops.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/controller/cadence/pcie-cadence-host.c | 7 ++++---
drivers/pci/controller/cadence/pcie-cadence.h | 8 ++++++++
2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c b/drivers/pci/controller/cadence/pcie-cadence-host.c
index 0929554f5a81..2efc33b1cade 100644
--- a/drivers/pci/controller/cadence/pcie-cadence-host.c
+++ b/drivers/pci/controller/cadence/pcie-cadence-host.c
@@ -12,8 +12,8 @@

#include "pcie-cadence.h"

-static void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
- int where)
+void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
+ int where)
{
struct pci_host_bridge *bridge = pci_find_host_bridge(bus);
struct cdns_pcie_rc *rc = pci_host_bridge_priv(bridge);
@@ -289,7 +289,8 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
list_splice_init(&resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->busnr = pcie->bus;
- bridge->ops = &cdns_pcie_host_ops;
+ if (!bridge->ops)
+ bridge->ops = &cdns_pcie_host_ops;
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;

diff --git a/drivers/pci/controller/cadence/pcie-cadence.h b/drivers/pci/controller/cadence/pcie-cadence.h
index 5171d0da37da..c879dd3d2893 100644
--- a/drivers/pci/controller/cadence/pcie-cadence.h
+++ b/drivers/pci/controller/cadence/pcie-cadence.h
@@ -472,11 +472,19 @@ static inline bool cdns_pcie_is_link_up(struct cdns_pcie *pcie)

#ifdef CONFIG_PCIE_CADENCE_HOST
int cdns_pcie_host_setup(struct cdns_pcie_rc *rc);
+void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
+ int where);
#else
static inline int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
{
return 0;
}
+
+static inline void __iomem *cdns_pci_map_bus(struct pci_bus *bus,
+ unsigned int devfn,
+ int where)
+{
+}
#endif

#ifdef CONFIG_PCIE_CADENCE_EP
--
2.17.1
\
 
 \ /
  Last update: 2019-12-09 10:21    [W:0.166 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site