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Date: Fri, 18 Oct 2019 13:26:47 +0100 From: Lee Jones <lee.jones@...aro.org> To: broonie@...nel.org, linus.walleij@...aro.org, daniel.thompson@...aro.org, arnd@...db.de Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, baohua@...nel.org, stephan@...hold.net, Lee Jones <lee.jones@...aro.org> Subject: [PATCH 2/2] mfd: mfd-core: Honour Device Tree's request to disable a child-device Until now, MFD has assumed all child devices passed to it (via mfd_cells) are to be registered. It does not take into account requests from Device Tree and the like to disable child devices on a per-platform basis. Well now it does. Reported-by: Barry Song <Baohua.Song@....com> Reported-by: Stephan Gerhold <stephan@...hold.net> Signed-off-by: Lee Jones <lee.jones@...aro.org> --- drivers/mfd/mfd-core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c index eafdadd58e8b..24c139633524 100644 --- a/drivers/mfd/mfd-core.c +++ b/drivers/mfd/mfd-core.c @@ -182,6 +182,11 @@ static int mfd_add_device(struct device *parent, int id, if (parent->of_node && cell->of_compatible) { for_each_child_of_node(parent->of_node, np) { if (of_device_is_compatible(np, cell->of_compatible)) { + if (!of_device_is_available(np)) { + /* Ignore disabled devices error free */ + ret = 0; + goto fail_alias; + } pdev->dev.of_node = np; pdev->dev.fwnode = &np->fwnode; break; -- 2.17.1
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