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cdx: add support for bus enable and disable

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CDX bus needs to be disabled before updating/writing devices
in the FPGA. Once the devices are written, the bus shall be
rescanned. This change provides sysfs entry to enable/disable the
CDX bus.

Co-developed-by: Nipun Gupta <nipun.gupta@amd.com>
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Link: https://lore.kernel.org/r/20231017160505.10640-6-abhijit.gangurde@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Abhijit Gangurde
2023-10-17 21:35:03 +05:30
committed by Greg Kroah-Hartman
parent ce558a391d
commit e3cfd49cb9
7 changed files with 203 additions and 0 deletions
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12
drivers/cdx/controller/cdx_controller.c
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@@ -33,6 +33,16 @@ static const struct cdx_mcdi_ops mcdi_ops = {
.mcdi_request = cdx_mcdi_request,
};
static int cdx_bus_enable(struct cdx_controller *cdx, u8 bus_num)
{
return cdx_mcdi_bus_enable(cdx->priv, bus_num);
}
static int cdx_bus_disable(struct cdx_controller *cdx, u8 bus_num)
{
return cdx_mcdi_bus_disable(cdx->priv, bus_num);
}
void cdx_rpmsg_post_probe(struct cdx_controller *cdx)
{
/* Register CDX controller with CDX bus driver */
@@ -128,6 +138,8 @@ static int cdx_scan_devices(struct cdx_controller *cdx)
}
static struct cdx_ops cdx_ops = {
.bus_enable = cdx_bus_enable,
.bus_disable = cdx_bus_disable,
.scan = cdx_scan_devices,
.dev_configure = cdx_configure_device,
};