linux - linux

	Commit message (Collapse)	Author	Age	Files	Lines
*	fsi: Prevent multiple concurrent rescans	Benjamin Herrenschmidt	2018-07-27	1	-0/+2
\| \| \| \| \| \| \| \|	The bus scanning process isn't terribly good at parallel attempts at rescanning the same bus. Let's have a per-master mutex protecting the scanning process. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
*	fsi: Move various master definitions to a common header	Benjamin Herrenschmidt	2018-07-12	1	-0/+33
\| \| \| \| \| \| \| \| \| \|	This moves the definitions for various protocol details (message & response codes, delays etc...) out of fsi-master-gpio.c to fsi-master.h in order to share them with other master implementations. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Joel Stanley <joel@jms.id.au>
*	fsi: Add mechanism to set the tSendDelay and tEchoDelay values	Benjamin Herrenschmidt	2018-07-12	1	-0/+2
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Those values control the amount of "dummy" clocks between commands and between a command and its response. This adds a way to configure them from sysfs (to be later extended to defaults in the device-tree). The default remains 16 (the HW default). This is only supported if the backend supports the new link_config() callback to configure the generation of those delays. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Joel Stanley <joel@jms.id.au> ---
*	fsi: master: Clarify master lifetimes & fix use-after-free in hub master	Jeremy Kerr	2018-03-14	1	-0/+15
\| \| \| \| \| \| \| \| \| \| \| \| \| \|	Once we call fsi_master_unregister, the core will put_device, potentially freeing the hub master. This change adds a comment explaining the lifetime of an allocated fsi_master. We then add a reference from the driver to the hub master, so it stays around until we've finished ->remove(). Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Tested-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
*	fsi: Add fsi_master_rescan()	Jeremy Kerr	2018-03-14	1	-0/+2
\| \| \| \| \| \| \| \| \| \| \| \|	We'll want non-core fsi code to trigger a rescan, so introduce a non-static fsi_master_rescan() function. Use this for the existing unscan/scan behaviour too. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Christopher Bostic <clbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
*	drivers/fsi: Use asynchronous slave mode	Jeremy Kerr	2017-06-09	1	-0/+2
\| \| \| \| \| \| \| \| \| \|	For slaves that are behind a software-clocked master, we want FSI CFAMs to run asynchronously to the FSI clock, so set up our slaves to be in async mode. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
*	drivers/fsi: Add fsi master definition	Jeremy Kerr	2017-06-09	1	-0/+41
	Add a `struct fsi_master` to represent a FSI master controller. FSI master drivers register one of these structs to provide device-specific of the standard operations: read/write/term/break and link control. Includes changes from Edward A. James <eajames@us.ibm.com> & Jeremy Kerr <jk@ozlabs.org>. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>