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Gustavo A. R. Silva 4fe81669df pinctrl: madera: Fix uninitialized variable bug in madera_mux_set_mux
There is a potential execution path in which variable *ret* is checked
in an IF statement, and then its value is used to report an error at
line 659 without being properly initialized previously:

659 if (ret)
660	dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret);

Fix this by initializing variable *ret* to 0 in order to
avoid unpredictable or unintended results.

Addresses-Coverity-ID: 1471969 ("Uninitialized scalar variable")
Fixes: 218d72a77b ("pinctrl: madera: Add driver for Cirrus Logic Madera codecs")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-10-12 11:14:38 +02:00
Linus Walleij 30aa69e7bd This is the 4.19-rc6 release
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Merge tag 'v4.19-rc6' into devel

This is the 4.19-rc6 release

I needed to merge this in because of extensive conflicts in
the MSM and Intel pin control drivers. I know how to resolve
them, so let's do it like this.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-10-01 13:20:45 +02:00
Richard Fitzgerald 5bc5a671b1 pinctrl: madera: Fix possible NULL pointer with pdata config
If we are being configured via pdata we don't necessarily have
any gpio mappings being configured that way so pdata->gpio_config
could be NULL.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-08-29 14:02:47 +02:00
Richard Fitzgerald 305fa67ee4 pinctrl: madera: Fix missing space in debugfs output
The SCHMITT tag was being dumped without a separating space.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-08-29 10:44:27 +02:00
Richard Fitzgerald d2f7a82204 pinctrl: madera: Return ENOTSUPP for unsupported pin attributes
The pin_config_[get|set] functions should return ENOTSUPP if
the requested attribute isn't supported.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-08-29 10:42:02 +02:00
Richard Fitzgerald 25cb9e5a0e pinctrl: madera: Set is_generic
We are using the generic pin configuration interface so
we can set is_generic.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2018-08-29 10:41:11 +02:00
Richard Fitzgerald 218d72a77b pinctrl: madera: Add driver for Cirrus Logic Madera codecs
These codecs have a variable number of I/O lines each of which
is individually selectable to a wide range of possible functions.

The functionality is slightly different from the traditional muxed
GPIO since most of the functions can be mapped to any pin (and even
the same function to multiple pins). Most pins have a dedicated
"alternate" function that is only available on that pin. The
alternate functions are usually a group of signals, though it is
not always necessary to enable the full group, depending on the
alternate function and how it is to be used. The mapping between
alternate functions and GPIO pins varies between codecs depending
on the number of alternate functions and available pins.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2018-06-05 11:15:23 +01:00