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[83.31.61.71]) by smtp.gmail.com with ESMTPSA id x129sm16961566wmg.8.2019.10.11.13.36.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 11 Oct 2019 13:36:15 -0700 (PDT) Subject: Re: [PATCH v12 12/16] leds: lp55xx: Add multicolor framework support to lp55xx To: Dan Murphy , pavel@ucw.cz Cc: linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org References: <20191011130657.4713-1-dmurphy@ti.com> <20191011130657.4713-13-dmurphy@ti.com> From: Jacek Anaszewski Openpgp: preference=signencrypt Autocrypt: addr=jacek.anaszewski@gmail.com; prefer-encrypt=mutual; keydata= mQINBFWjfaEBEADd66EQbd6yd8YjG0kbEDT2QIkx8C7BqMXR8AdmA1OMApbfSvEZFT1D/ECR eWFBS8XtApKQx1xAs1j5z70k3zebk2eeNs5ahxi6vM4Qh89vBM46biSKeeX5fLcv7asmGb/a FnHPAfQaKFyG/Bj9V+//ef67hpjJWR3s74C6LZCFLcbZM0z/wTH+baA5Jwcnqr4h/ygosvhP X3gkRzJLSFYekmEv+WHieeKXLrJdsUPUvPJTZtvi3ELUxHNOZwX2oRJStWpmL2QGMwPokRNQ 29GvnueQdQrIl2ylhul6TSrClMrKZqOajDFng7TLgvNfyVZE8WQwmrkTrdzBLfu3kScjE14Q Volq8OtQpTsw5570D4plVKh2ahlhrwXdneSot0STk9Dh1grEB/Jfw8dknvqkdjALUrrM45eF FM4FSMxIlNV8WxueHDss9vXRbCUxzGw37Ck9JWYo0EpcpcvwPf33yntYCbnt+RQRjv7vy3w5 osVwRR4hpbL/fWt1AnZ+RvbP4kYSptOCPQ+Pp1tCw16BOaPjtlqSTcrlD2fo2IbaB5D21SUa IsdZ/XkD+V2S9jCrN1yyK2iKgxtDoUkWiqlfRgH2Ep1tZtb4NLF/S0oCr7rNLO7WbqLZQh1q ShfZR16h7YW//1/NFwnyCVaG1CP/L/io719dPWgEd/sVSKT2TwARAQABtC1KYWNlayBBbmFz emV3c2tpIDxqYWNlay5hbmFzemV3c2tpQGdtYWlsLmNvbT6JAlgEEwEIAEICGwMHCwkIBwMC AQYVCAIJCgsDFgIBAh4BAheABQkJZgNMFiEEvx38ClaPBfeVdXCQvWpQHLeLfCYFAl05/9sC GQEACgkQvWpQHLeLfCarMQ/9FN/WqJdN2tf6xkP0RFyS4ft0sT04zkOCFfOMxs8mZ+KZoMU+ X3a+fEppDL7xgRFpHyGaEel7lSi1eqtzsqZ5JiHbDS1Ht1G8TtATb8q8id68qeSeW2mfzaLQ 98NPELGfUXFoUqUQkG5z2p92UrGF4Muj1vOIW93pwvE4uDpNsl+jriwHomLtjIUoZtIRjGfZ RCyUQI0vi5LYzXCebuzAjGD7Jh2YAp7fDGrv3qTq8sX+DUJ4H/+I8PiL+jXKkEeppqIhlBJJ l4WcgggMu3c2uljYDuqRYghte33BXyCPAocfO2/sN+yJRUTVuRFlOxUk4srz/W8SQDwOAwtK V7TzdyF1/jOGBxWwS13EjMb4u3XwPMzcPlEQNdIqz76NFmJ99xYEvgkAmFmRioxuBTRv8Fs1 c1jQ00WWJ5vezqY6lccdDroPalXWeFzfPjIhKbV3LAYTlqv0It75GW9+0TBhPqdTM15DrCVX B7Ues7UnD5FBtWwewTnwr+cu8te449VDMzN2I+a9YKJ1s6uZmzh5HnuKn6tAfGyQh8MujSOM lZrNHrRsIsLXOjeGVa84Qk/watEcOoyQ7d+YaVosU0OCZl0GldvbGp1z2u8cd2N/HJ7dAgFh Q7dtGXmdXpt2WKQvTvQXhIrCWVQErNYbDZDD2V0TZtlPBaZP4fkUDkvH+Sy5Ag0EVaN9oQEQ AMPNymBNoCWc13U6qOztXrIKBVsLGZXq/yOaR2n7gFbFACD0TU7XuH2UcnwvNR+uQFwSrRqa EczX2V6iIy2CITXKg5Yvg12yn09gTmafuoIyKoU16XvC3aZQQ2Bn3LO2sRP0j/NuMD9GlO37 pHCVRpI2DPxFE39TMm1PLbHnDG8+lZql+dpNwWw8dDaRgyXx2Le542CcTBT52VCeeWDtqd2M wOr4LioYlfGfAqmwcwucBdTEBUxklQaOR3VbJQx6ntI2oDOBlNGvjnVDzZe+iREd5l40l+Oj TaiWvBGXkv6OI+wx5TFPp+BM6ATU+6UzFRTUWbj+LqVA/JMqYHQp04Y4H5GtjbHCa8abRvBw IKEvpwTyWZlfXPtp8gRlNmxYn6gQlTyEZAWodXwE7CE+KxNnq7bPHeLvrSn8bLNK682PoTGr 0Y00bguYLfyvEwuDYek1/h9YSXtHaCR3CEj4LU1B561G1j7FVaeYbX9bKBAoy/GxAW8J5O1n mmw7FnkSHuwO/QDe0COoO0QZ620Cf9IBWYHW4m2M2yh5981lUaiMcNM2kPgsJFYloFo2XGn6 lWU9BrWjEoNDhHZtF+yaPEuwjZo6x/3E2Tu3E5Jj0VpVcE9U1Zq/fquDY79l2RJn5ENogOs5 +Pi0GjVpEYQVWfm0PTCxNPOzOzGR4QB3BNFvABEBAAGJAiUEGAEIAA8FAlWjfaECGwwFCQlm AYAACgkQvWpQHLeLfCZqGxAAlWBWVvjU6xj70GwengiqYZwmW1i8gfS4TNibQT/KRq0zkBnE wgKwXRbVoW38pYVuGa5x/JDQMJDrLAJ0wrCOS3XxbSHCWOl/k2ZD9OaxUeXq6N+OmGTzfrYv PUvWS1Hy04q9AD1dIaMNruZQmvnRfkOk2UDncDIg0166/NTHiYI09H5mpWGpHn/2aT6dmpVw uoM9/rHlF5s5qAAo95tZ0QW2BtIceG9/rbYlL57waSMPF49awvwLQX5RhWoF8mPS5LsBrXXK hmizIsn40tLbi2RtWjzDWgZYitqmmqijeCnDvISN4qJ/nCLO4DjiSGs59w5HR+l0nwePDhOC A4RYZqS1e2Clx1VSkDXFpL3egabcIsqK7CZ6a21r8lXVpo4RnMlQsmXZTnRx4SajFvX7PrRg /02C811fLfh2r5O5if8sKQ6BKKlHpuuioqfj/w9z3B0aQ71e4n1zNJBO1kcdznikPLAbr7jG gkBUXT1yJiwpTfRQr5y2Uo12IJsKxohnNFVYtK8X/R6S0deKPjrZWvAkllgIPcHjMi2Va8yw KTj/JgcpUO5KN906Pf7ywZISe7Kbcc/qnE0YjPPSqFOvoeZvHe6EZCMW9+xZsaipvlqpByQV UHnVg09K9YFvjUBsBPdC8ef6YwgfR9o6AnPmxl0oMUIXkCCC5c99fzJY/k+JAq0EGAEIACAW IQS/HfwKVo8F95V1cJC9alAct4t8JgUCWwqKhgIbAgCBCRC9alAct4t8JnYgBBkWCAAdFiEE FMMcSshOZf56bfAEYhBsURv0pdsFAlsKioYACgkQYhBsURv0pdvELgD/U+y3/hsz0bIjMQJY 0LLxM/rFY9Vz1L43+lQHXjL3MPsA/1lNm5sailsY7aFBVJxAzTa8ZAGWBdVaGo6KCvimDB8G 7joP/jx+oGOmdRogs7mG//H+w9DTnBfPpnfkeiiokGYo/+huWO5V0Ac9tTqZeFc//t/YuYJn wWvS0Rx+KL0fT3eh9BQo47uF4yDiZIiWLNh4Agpup1MUSVsz4MjD0lW6ghtnLcGlIgoVHW0v tPW1m9jATYyJSOG/MC1iDrcYcp9uVYn5tKfkEeQNspuG6iSfS0q3tajPKnT1nJxMTxVOD2RW EIGfaV9Scrou92VD/eC+/8INRsiWS93j3hOKIAV5XRNINFqtzkagPYAP8r6wksjSjh01fSTB p5zxjfsIwWDDzDrqgzwv83CvrLXRV3OlG1DNUDYA52qJr47paH5QMWmHW5TNuoBX8qb6RW/H M3DzPgT+l+r1pPjMPfvL1t7civZUoPuNzoyFpQRj6TvWi2bGGMQKryeYksXG2zi2+avMFnLe lOxGdUZ7jn1SJ6Abba5WL3VrXCP+TUE6bZLgfw8kYa8QSXP3ysyeMI0topHFntBZ8a0KXBNs qqFCBWmTHXfwsfW0VgBmRtPO7eXVBybjJ1VXKR2RZxwSq/GoNXh/yrRXQxbcpZ+QP3/Tttsb FdKciZ4u3ts+5UwYra0BRuvb51RiZR2wRNnUeBnXWagJVTlG7RHBO/2jJOE6wrcdCMjs0Iiw PNWmiVoZA930TvHA5UeGENxdGqo2MvMdRJ54YaIR Message-ID: Date: Fri, 11 Oct 2019 22:36:14 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191011130657.4713-13-dmurphy@ti.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-leds-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Dan, On 10/11/19 3:06 PM, Dan Murphy wrote: > Add multicolor framework support for the lp55xx family. > > Signed-off-by: Dan Murphy > --- > drivers/leds/Kconfig | 1 + > drivers/leds/leds-lp55xx-common.c | 176 +++++++++++++++++++--- > drivers/leds/leds-lp55xx-common.h | 9 ++ > include/linux/platform_data/leds-lp55xx.h | 7 + > 4 files changed, 169 insertions(+), 24 deletions(-) > > diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig > index fb614a6b9afa..5706bf8d8bd1 100644 > --- a/drivers/leds/Kconfig > +++ b/drivers/leds/Kconfig > @@ -377,6 +377,7 @@ config LEDS_LP50XX > config LEDS_LP55XX_COMMON > tristate "Common Driver for TI/National LP5521/5523/55231/5562/8501" > depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562 || LEDS_LP8501 > + depends on OF > select FW_LOADER > select FW_LOADER_USER_HELPER > help > diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c > index 44ced02b49f9..1417df6df8a7 100644 > --- a/drivers/leds/leds-lp55xx-common.c > +++ b/drivers/leds/leds-lp55xx-common.c > @@ -131,14 +131,54 @@ static struct attribute *lp55xx_led_attrs[] = { > }; > ATTRIBUTE_GROUPS(lp55xx_led); > > +static int lp55xx_map_channel(struct lp55xx_led *led, int color_id, > + enum led_brightness brightness) > +{ > + int i; > + > + for (i = 0; i < led->mc_cdev.num_leds; i++) { > + if (led->color_component[i].color_id == color_id) { > + led->color_component[i].brightness = brightness; > + return 0; > + } > + } > + > + return -EINVAL; > +} > + > static int lp55xx_set_brightness(struct led_classdev *cdev, > enum led_brightness brightness) > { > + struct led_mc_color_conversion color_component[LP55XX_MAX_GROUPED_CHAN]; > struct lp55xx_led *led = cdev_to_lp55xx_led(cdev); > struct lp55xx_device_config *cfg = led->chip->cfg; > + int ret; > + int i; > > - led->brightness = (u8)brightness; > - return cfg->brightness_fn(led); > + if (led->mc_cdev.num_leds > 1) { > + if (!cfg->color_intensity_fn) > + return -EINVAL; > + > + led_mc_calc_color_components(&led->mc_cdev, brightness, > + color_component); > + > + for (i = 0; i < led->mc_cdev.num_leds; i++) { > + ret = lp55xx_map_channel(led, > + color_component[i].color_id, > + color_component[i].brightness); > + if (ret) > + return ret; > + } > + > + ret = cfg->color_intensity_fn(led); > + if (ret) > + return ret; > + } else { > + led->brightness = (u8)brightness; > + ret = cfg->brightness_fn(led); > + } > + > + return ret; > } > > static int lp55xx_init_led(struct lp55xx_led *led, > @@ -147,9 +187,9 @@ static int lp55xx_init_led(struct lp55xx_led *led, > struct lp55xx_platform_data *pdata = chip->pdata; > struct lp55xx_device_config *cfg = chip->cfg; > struct device *dev = &chip->cl->dev; > + int max_channel = cfg->max_channel; > char name[32]; > int ret; > - int max_channel = cfg->max_channel; > > if (chan >= max_channel) { > dev_err(dev, "invalid channel: %d / %d\n", chan, max_channel); > @@ -159,10 +199,34 @@ static int lp55xx_init_led(struct lp55xx_led *led, > if (pdata->led_config[chan].led_current == 0) > return 0; > > + if (pdata->led_config[chan].name) { > + led->cdev.name = pdata->led_config[chan].name; > + } else { > + snprintf(name, sizeof(name), "%s:channel%d", > + pdata->label ? : chip->cl->name, chan); > + led->cdev.name = name; > + } > + > + if (pdata->led_config[chan].num_colors > 1) { > + led->mc_cdev.led_cdev = &led->cdev; > + led->cdev.brightness_set_blocking = lp55xx_set_brightness; > + led->cdev.groups = lp55xx_led_groups; > + led->mc_cdev.num_leds = pdata->led_config[chan].num_colors; > + led->mc_cdev.available_colors = > + pdata->led_config[chan].available_colors; > + memcpy(led->color_component, > + pdata->led_config[chan].color_component, > + sizeof(led->color_component)); > + } else { > + > + led->cdev.default_trigger = > + pdata->led_config[chan].default_trigger; > + led->cdev.brightness_set_blocking = lp55xx_set_brightness; > + } led->cdev.groups = lp55xx_led_groups; > + > led->led_current = pdata->led_config[chan].led_current; > led->max_current = pdata->led_config[chan].max_current; > led->chan_nr = pdata->led_config[chan].chan_nr; > - led->cdev.default_trigger = pdata->led_config[chan].default_trigger; > > if (led->chan_nr >= max_channel) { > dev_err(dev, "Use channel numbers between 0 and %d\n", > @@ -170,18 +234,11 @@ static int lp55xx_init_led(struct lp55xx_led *led, > return -EINVAL; > } > > - led->cdev.brightness_set_blocking = lp55xx_set_brightness; > - led->cdev.groups = lp55xx_led_groups; > - > - if (pdata->led_config[chan].name) { > - led->cdev.name = pdata->led_config[chan].name; > - } else { > - snprintf(name, sizeof(name), "%s:channel%d", > - pdata->label ? : chip->cl->name, chan); > - led->cdev.name = name; > - } > + if (pdata->led_config[chan].num_colors > 1) > + ret = led_classdev_multicolor_register(dev, &led->mc_cdev); > + else > + ret = led_classdev_register(dev, &led->cdev); Why not devm versions? > - ret = led_classdev_register(dev, &led->cdev); > if (ret) { > dev_err(dev, "led register err: %d\n", ret); > return ret; > @@ -466,7 +523,6 @@ int lp55xx_register_leds(struct lp55xx_led *led, struct lp55xx_chip *chip) > dev_err(&chip->cl->dev, "empty brightness configuration\n"); > return -EINVAL; > } > - This empty line removal was not intended I suppose. > for (i = 0; i < num_channels; i++) { > > /* do not initialize channels that are not connected */ > @@ -538,6 +594,82 @@ void lp55xx_unregister_sysfs(struct lp55xx_chip *chip) > } > EXPORT_SYMBOL_GPL(lp55xx_unregister_sysfs); > > +static int lp5xx_parse_common_child(struct device_node *np, > + struct lp55xx_led_config *cfg, > + int chan_num, bool is_multicolor, > + int color_num) > +{ > + u32 led_number; > + int ret; > + > + of_property_read_string(np, "chan-name", > + &cfg[chan_num].name); > + of_property_read_u8(np, "led-cur", > + &cfg[chan_num].led_current); > + of_property_read_u8(np, "max-cur", > + &cfg[chan_num].max_current); > + > + ret = of_property_read_u32(np, "reg", &led_number); > + if (ret) > + return ret; > + > + if (led_number < 0 || led_number > 6) > + return -EINVAL; > + > + if (is_multicolor) > + cfg[chan_num].color_component[color_num].output_num = > + led_number; > + else > + cfg[chan_num].chan_nr = led_number; > + > + return 0; > +} > + > +static int lp5xx_parse_channel_child(struct device_node *np, > + struct lp55xx_led_config *cfg, > + int child_number) > +{ > + struct device_node *child; > + int channel_color; > + int num_colors = 0; > + u32 color_id; > + int ret; > + > + cfg[child_number].default_trigger = > + of_get_property(np, "linux,default-trigger", NULL); > + > + ret = of_property_read_u32(np, "color", &channel_color); > + if (ret) > + channel_color = ret; > + > + > + if (channel_color == LED_COLOR_ID_MULTI) { > + for_each_child_of_node(np, child) { > + ret = lp5xx_parse_common_child(child, cfg, > + child_number, true, > + num_colors); > + if (ret) > + return ret; > + > + ret = of_property_read_u32(child, "color", &color_id); > + if (ret) > + return ret; > + > + cfg[child_number].color_component[num_colors].color_id = > + color_id; > + set_bit(color_id, &cfg[child_number].available_colors); > + num_colors++; > + } > + > + cfg[child_number].num_colors = num_colors; > + } else { > + return lp5xx_parse_common_child(np, cfg, child_number, false, > + num_colors); > + } > + > + return 0; > +} > + > struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, > struct device_node *np) > { > @@ -546,6 +678,7 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, > struct lp55xx_led_config *cfg; > int num_channels; > int i = 0; > + int ret; > > pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); > if (!pdata) > @@ -565,14 +698,9 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, > pdata->num_channels = num_channels; > > for_each_child_of_node(np, child) { > - cfg[i].chan_nr = i; > - > - of_property_read_string(child, "chan-name", &cfg[i].name); > - of_property_read_u8(child, "led-cur", &cfg[i].led_current); > - of_property_read_u8(child, "max-cur", &cfg[i].max_current); > - cfg[i].default_trigger = > - of_get_property(child, "linux,default-trigger", NULL); > - > + ret = lp5xx_parse_channel_child(child, cfg, i); > + if (ret) > + return ERR_PTR(-EINVAL); > i++; > } > > diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h > index 783ed5103ce5..75d57fb835c3 100644 > --- a/drivers/leds/leds-lp55xx-common.h > +++ b/drivers/leds/leds-lp55xx-common.h > @@ -12,6 +12,8 @@ > #ifndef _LEDS_LP55XX_COMMON_H > #define _LEDS_LP55XX_COMMON_H > > +#include > + > enum lp55xx_engine_index { > LP55XX_ENGINE_INVALID, > LP55XX_ENGINE_1, > @@ -109,6 +111,9 @@ struct lp55xx_device_config { > /* access brightness register */ > int (*brightness_fn)(struct lp55xx_led *led); > > + /* access specific brightness register */ > + int (*color_intensity_fn)(struct lp55xx_led *led); Wouldn't multicolor_brightness_fn be more accurate now ? It is vital to reduce possibility of confusing mc framework intensity with brightness level that is set on each grouped monochrome LED channel. > + > /* current setting function */ > void (*set_led_current) (struct lp55xx_led *led, u8 led_current); > > @@ -159,6 +164,8 @@ struct lp55xx_chip { > * struct lp55xx_led > * @chan_nr : Channel number > * @cdev : LED class device > + * @mc_cdev : Multi color class device > + * @color_component : Multi color LED map information > * @led_current : Current setting at each led channel > * @max_current : Maximun current at each led channel > * @brightness : Brightness value > @@ -167,6 +174,8 @@ struct lp55xx_chip { > struct lp55xx_led { > int chan_nr; > struct led_classdev cdev; > + struct led_classdev_mc mc_cdev; > + struct led_mc_color_conversion color_component[LP55XX_MAX_GROUPED_CHAN]; > u8 led_current; > u8 max_current; > u8 brightness; > diff --git a/include/linux/platform_data/leds-lp55xx.h b/include/linux/platform_data/leds-lp55xx.h > index 96a787100fda..0f9b88019c18 100644 > --- a/include/linux/platform_data/leds-lp55xx.h > +++ b/include/linux/platform_data/leds-lp55xx.h > @@ -12,17 +12,24 @@ > #ifndef _LEDS_LP55XX_H > #define _LEDS_LP55XX_H > > +#include > + > /* Clock configuration */ > #define LP55XX_CLOCK_AUTO 0 > #define LP55XX_CLOCK_INT 1 > #define LP55XX_CLOCK_EXT 2 > > +#define LP55XX_MAX_GROUPED_CHAN 4 > + > struct lp55xx_led_config { > const char *name; > const char *default_trigger; > u8 chan_nr; > u8 led_current; /* mA x10, 0 if led is not connected */ > u8 max_current; > + int num_colors; > + unsigned long available_colors; > + struct led_mc_color_conversion color_component[LP55XX_MAX_GROUPED_CHAN]; > }; > > struct lp55xx_predef_pattern { > -- Best regards, Jacek Anaszewski