The OMAP1 OHCI driver needs to enable the OCPI IP block before it can
work. Previously, the driver was simply calling a symbol defined in
the OMAP platform code, but this is incorrect: drivers should be fully
decoupled from platform and architecture code.
So instead, modify the driver to call through a platform_data function
pointer instead. We skip any DT aspect, since OMAP1 is not scheduled
to be converted to DT in the near future.
This resolves the following sparse warning:
It also gets rid of a cpu_is_omap16xx() call in a driver.
In the long term, it probably makes sense to move the OCPI bus code to
somewhere under drivers/. This should avoid the whole platform_data/DT
issue with this function.
Also interesting is that drivers/usb/host/ohci-nxp.c contains a stub
for ocpi_enable() - perhaps the NXP chips use a similar OCPI IP block?
Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
Cc: Roland Stigge <stigge@xxxxxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
Cc: Anand Gadiyar <gadiyar@xxxxxx>
---
arch/arm/mach-omap1/usb.c | 3 +++
arch/arm/plat-omap/include/plat/board.h | 2 ++
drivers/usb/host/ohci-omap.c | 5 +++--
3 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap1/usb.c b/arch/arm/mach-omap1/usb.c
index 19de03b..e61afd9 100644
--- a/arch/arm/mach-omap1/usb.c
+++ b/arch/arm/mach-omap1/usb.c
@@ -29,6 +29,8 @@
#include <plat/mux.h>
#include <plat/usb.h>
+#include "common.h"
+
/* These routines should handle the standard chip-specific modes
* for usb0/1/2 ports, covering basic mux and transceiver setup.
*
@@ -138,6 +140,7 @@ static inline void ohci_device_init(struct omap_usb_config *pdata)
if (cpu_is_omap7xx())
ohci_resources[1].start = INT_7XX_USB_HHC_1;
pdata->ohci_device = &ohci_device;
+ pdata->ocpi_enable = &ocpi_enable;
}
#else
diff --git a/arch/arm/plat-omap/include/plat/board.h b/arch/arm/plat-omap/include/plat/board.h
index d5eb4c8..4814c5b 100644
--- a/arch/arm/plat-omap/include/plat/board.h
+++ b/arch/arm/plat-omap/include/plat/board.h
@@ -91,6 +91,8 @@ struct omap_usb_config {
u32 (*usb0_init)(unsigned nwires, unsigned is_device);
u32 (*usb1_init)(unsigned nwires);
u32 (*usb2_init)(unsigned nwires, unsigned alt_pingroup);
+
+ int (*ocpi_enable)(void);
};
struct omap_lcd_config {
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 96451e4..71229cb 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -205,8 +205,9 @@ static int ohci_omap_init(struct usb_hcd *hcd)
need_transceiver = need_transceiver
|| machine_is_omap_h2() || machine_is_omap_h3();
- if (cpu_is_omap16xx())
- ocpi_enable();
+ /* XXX OMAP16xx only */
+ if (config->ocpi_enable)
+ config->ocpi_enable();
#ifdef CONFIG_USB_OTG
if (need_transceiver) {
--
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