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Ashwin Chaugule 86c22f8c9a Mailbox: Add support for Platform Communication Channel ... ACPI 5.0+ spec defines a generic mode of communication between the OS and a platform such as the BMC. This medium (PCC) is typically used by CPPC (ACPI CPU Performance management), RAS (ACPI reliability protocol) and MPST (ACPI Memory power states). This patch adds PCC support as a Mailbox Controller. As of ACPI v5.1 there is no provision for clients to lookup mailbox controllers in a way that Linux expects. e.g. in DT the clients can list the mailboxes they can associate with in the DT binding and then provide a unique index to lookup a channel within a mailbox. Since the ACPI spec doesn't have anything similar, we introduce a mailbox controller specific API so that when the client calls it, we know to lookup in the context of a specific controller. This also helps in keeping a consistent interface across DT and ACPI for such drivers. This patch implements basic PCC support using the ACPI v5.1 structures. IRQ mode support will be provided as follow up patches. Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org> Reviewed-by: Mark Brown <broonie@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>		10 years ago
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Kconfig	Mailbox: Add support for Platform Communication Channel	10 years ago
Makefile	Mailbox: Add support for Platform Communication Channel	10 years ago
mailbox.c	Mailbox: Add support for Platform Communication Channel	10 years ago
mailbox.h	Mailbox: Add support for Platform Communication Channel	10 years ago
omap-mailbox.c	mailbox/omap: adapt to the new mailbox framework	10 years ago
pcc.c	Mailbox: Add support for Platform Communication Channel	10 years ago
pl320-ipc.c	mailbox: rename pl320-ipc specific mailbox.h	10 years ago