| Message ID | 20211115203459.1634079-6-marijn.suijten@somainline.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | backlight: qcom-wled: fix and solidify handling of enabled-strings | expand |
On Mon, Nov 15, 2021 at 09:34:55PM +0100, Marijn Suijten wrote: > The length of qcom,enabled-strings as property array is enough to > determine the number of strings to be enabled, without needing to set > qcom,num-strings to override the default number of strings when less > than the default (which is also the maximum) is provided in DT. > > This also introduces an extra warning when qcom,num-strings is set, > denoting that it is not necessary to set both anymore. It is usually > more concise to set just qcom,num-length when a zero-based, contiguous > range of strings is needed (the majority of the cases), or to only set > qcom,enabled-strings when a specific set of indices is desired. > > Fixes: 775d2ffb4af6 ("backlight: qcom-wled: Restructure the driver for WLED3") > Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Daniel.
On Mon, 15 Nov 2021, Marijn Suijten wrote: > The length of qcom,enabled-strings as property array is enough to > determine the number of strings to be enabled, without needing to set > qcom,num-strings to override the default number of strings when less > than the default (which is also the maximum) is provided in DT. > > This also introduces an extra warning when qcom,num-strings is set, > denoting that it is not necessary to set both anymore. It is usually > more concise to set just qcom,num-length when a zero-based, contiguous > range of strings is needed (the majority of the cases), or to only set > qcom,enabled-strings when a specific set of indices is desired. > > Fixes: 775d2ffb4af6 ("backlight: qcom-wled: Restructure the driver for WLED3") > Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org> > --- > drivers/video/backlight/qcom-wled.c | 12 +++++++++--- > 1 file changed, 9 insertions(+), 3 deletions(-) Applied, thanks.
diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index ab10910971e9..5306b06044b4 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -1520,6 +1520,8 @@ static int wled_configure(struct wled *wled) return -EINVAL; } } + + cfg->num_strings = string_len; } rc = of_property_read_u32(dev->of_node, "qcom,num-strings", &val); @@ -1530,9 +1532,13 @@ static int wled_configure(struct wled *wled) return -EINVAL; } - if (string_len > 0 && val > string_len) { - dev_err(dev, "qcom,num-strings exceeds qcom,enabled-strings\n"); - return -EINVAL; + if (string_len > 0) { + dev_warn(dev, "Only one of qcom,num-strings or qcom,enabled-strings" + " should be set\n"); + if (val > string_len) { + dev_err(dev, "qcom,num-strings exceeds qcom,enabled-strings\n"); + return -EINVAL; + } } cfg->num_strings = val;
The length of qcom,enabled-strings as property array is enough to determine the number of strings to be enabled, without needing to set qcom,num-strings to override the default number of strings when less than the default (which is also the maximum) is provided in DT. This also introduces an extra warning when qcom,num-strings is set, denoting that it is not necessary to set both anymore. It is usually more concise to set just qcom,num-length when a zero-based, contiguous range of strings is needed (the majority of the cases), or to only set qcom,enabled-strings when a specific set of indices is desired. Fixes: 775d2ffb4af6 ("backlight: qcom-wled: Restructure the driver for WLED3") Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org> --- drivers/video/backlight/qcom-wled.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)