Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754085AbcLGAQr (ORCPT ); Tue, 6 Dec 2016 19:16:47 -0500 Received: from mail-oi0-f67.google.com ([209.85.218.67]:33190 "EHLO mail-oi0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753173AbcLGAPO (ORCPT ); Tue, 6 Dec 2016 19:15:14 -0500 From: Chris Bostic To: robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, gregkh@linuxfoundation.org, sre@kernel.org, mturquette@baylibre.com, geert+renesas@glider.be, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Jeremy Kerr , joel@jms.id.au, linux-kernel@vger.kernel.org, andrew@aj.id.au, alistair@popple.id.au, benh@kernel.crashing.org, Chris Bostic Subject: [PATCH 07/16] drivers/fsi: Add empty master scan Date: Tue, 6 Dec 2016 18:14:28 -0600 Message-Id: <1481069677-53660-8-git-send-email-christopher.lee.bostic@gmail.com> X-Mailer: git-send-email 2.7.4 (Apple Git-66) In-Reply-To: <1481069677-53660-1-git-send-email-christopher.lee.bostic@gmail.com> References: <1481069677-53660-1-git-send-email-christopher.lee.bostic@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1553 Lines: 63 From: Jeremy Kerr When a new fsi master is added, we will need to scan its links, and slaves attached to those links. This change introduces a little shell to iterate the links, which we will populate with the actual slave scan in a later change. Signed-off-by: Jeremy Kerr Signed-off-by: Chris Bostic --- drivers/fsi/fsi-core.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c index 60a6d91..ceaf536 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -19,6 +19,8 @@ #include "fsi-master.h" +#define FSI_N_SLAVES 4 + static atomic_t master_idx = ATOMIC_INIT(-1); struct fsi_slave { @@ -30,12 +32,34 @@ struct fsi_slave { #define to_fsi_slave(d) container_of(d, struct fsi_slave, dev) +/* FSI slave support */ +static int fsi_slave_init(struct fsi_master *master, + int link, uint8_t slave_id) +{ + /* todo: initialise slave device, perform engine scan */ + + return -ENODEV; +} + /* FSI master support */ +static int fsi_master_scan(struct fsi_master *master) +{ + int link, slave_id; + + for (link = 0; link < master->n_links; link++) + for (slave_id = 0; slave_id < FSI_N_SLAVES; slave_id++) + fsi_slave_init(master, link, slave_id); + + return 0; + +} + int fsi_master_register(struct fsi_master *master) { master->idx = atomic_inc_return(&master_idx); get_device(master->dev); + fsi_master_scan(master); return 0; } EXPORT_SYMBOL_GPL(fsi_master_register); -- 1.8.2.2