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p2sb: Add a method to hide the bus

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The P2SB bus needs to be hidden in some cases so that it does not get
auto-configured by Linux. Add a method for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Tested-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
This commit is contained in:
Simon Glass 2020-07-07 21:32:30 -06:00 committed by Bin Meng
parent 4b0ec52b9e
commit 6d349e2e43
2 changed files with 34 additions and 1 deletions
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10
drivers/misc/p2sb-uclass.c
View file

@ -18,6 +18,16 @@
#define PCR_COMMON_IOSF_1_0 1
int p2sb_set_hide(struct udevice *dev, bool hide)
{
struct p2sb_ops *ops = p2sb_get_ops(dev);
if (!ops->set_hide)
return -ENOSYS;
return ops->set_hide(dev, hide);
}
void *pcr_reg_address(struct udevice *dev, uint offset)
{
struct p2sb_child_platdata *pplat = dev_get_parent_platdata(dev);

25
include/p2sb.h
View file

@ -31,13 +31,36 @@ struct p2sb_uc_priv {
};
/**
* struct p2sb_ops - Operations for the P2SB (none at present)
* struct p2sb_ops - Operations for the P2SB
*/
struct p2sb_ops {
/**
* set_hide() - Set/clear the 'hide' bit on the p2sb
*
* This device can be hidden from the PCI bus if needed. This method
* can be called before the p2sb is probed.
*
* @dev: P2SB device
* @hide: true to hide the device, false to show it
* @return 0 if OK, -ve on error
*/
int (*set_hide)(struct udevice *dev, bool hide);
};
#define p2sb_get_ops(dev) ((struct p2sb_ops *)(dev)->driver->ops)
/**
* p2sb_set_hide() - Set/clear the 'hide' bit on the p2sb
*
* This device can be hidden from the PCI bus if needed. This method
* can be called before the p2sb is probed.
*
* @dev: P2SB device
* @hide: true to hide the device, false to show it
* @return 0 if OK, -ve on error
*/
int p2sb_set_hide(struct udevice *dev, bool hide);
/**
* pcr_read32/16/8() - Read from a PCR device
*