[PATCH v31 03/12] leds: lp50xx: Add the LP50XX family of the RGB LED driver
Dan Murphy
dmurphy at ti.com
Tue Jul 21 20:04:54 EDT 2020
Pavel
On 7/21/20 4:05 PM, Pavel Machek wrote:
> Hi!
>
>> The device has the ability to group LED output into control banks
>> so that multiple LED banks can be controlled with the same mixing and
>> brightness. Inversely the LEDs can also be controlled independently.
> Inversely?
I will revise it.
>
>> --- /dev/null
>> +++ b/drivers/leds/leds-lp50xx.c
>> @@ -0,0 +1,784 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// TI LP50XX LED chip family driver
>> +// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
>> +
> Can we get https here and in the binding document?
>
> Please run this through checkpatch -- I believe it will have some
> comments.
OK.
>
>> +
>> + device_for_each_child_node(priv->dev, child) {
>> + led = &priv->leds[i];
>> + ret = fwnode_property_count_u32(child, "reg");
>> + if (ret < 0) {
>> + dev_err(&priv->client->dev,
>> + "reg property is invalid\n");
>> + return -EINVAL;
> is handle_put(child) needed here?
It will be after I refactor the label
>> + }
>> + if (ret > 1) {
>> + priv->num_of_banked_leds = ret;
>> + if (priv->num_of_banked_leds >
>> + priv->chip_info->max_modules) {
>> + dev_err(&priv->client->dev,
>> + "reg property is invalid\n");
>> + ret = -EINVAL;
>> + fwnode_handle_put(child);
>> + goto child_out;
>> + }
>> +
>> + ret = fwnode_property_read_u32_array(child,
>> + "reg",
>> + led_banks,
>> + ret);
> Move this to subfunction to reduce the indentation? (Or, just refactor
> it somehow).
Actually I can just put it all on the same line since the 80 character
requirement is relaxed.
>> + if (ret) {
>> + dev_err(&priv->client->dev,
>> + "reg property is missing\n");
>> + fwnode_handle_put(child);
>> + goto child_out;
>> + }
> Create label that does the handle_put so you don't need to repeat it
> quite so often?
I will rework it for all
>
>> + fwnode_for_each_child_node(child, led_node) {
>> + ret = fwnode_property_read_u32(led_node, "color",
>> + &color_id);
>> + if (ret)
>> + dev_err(priv->dev, "Cannot read color\n");
>> +
>> + mc_led_info[num_colors].color_index = color_id;
> This uses undefined value.
OK needs to goto to out.
>
>> + ret = lp50xx_reset(led);
> Does the GPIO need to be disabled before enabling it for reset?
You mean toggle the GPIO? Yes it should be toggled I will update it.
Dan
> Best regards,
> Pavel
>
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