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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds

Browse Source 
Pull LED subsystem update from Bryan Wu:
 "Basically this cycle is mostly cleanup for LED subsystem"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
  leds: s3c24xx: Remove hardware.h inclusion
  leds: replace list_for_each with list_for_each_entry
  leds: kirkwood: Cleanup in header files
  leds: pwm: Remove a warning on non-DT platforms
  leds: leds-pwm: fix duty time overflow.
  leds: leds-mc13783: Remove unneeded mc13xxx_{un}lock
  leds: leds-mc13783: Remove duplicate field in platform data
  drivers: leds: leds-tca6507: check CONFIG_GPIOLIB whether defined for 'gpio_base'
  leds: lp5523: Support LED MUX configuration on running a pattern
  leds: lp5521/5523: Fix multiple engine usage bug
  LEDS: tca6507 - fix up some comments.
  LEDS: tca6507: add device-tree support for GPIO configuration.
  LEDS: tca6507 - fix bugs in parsing of device-tree configuration.
This commit is contained in:
Linus Torvalds 2014-01-28 18:53:01 -08:00
commit 268943fb75
14 changed files with 226 additions and 230 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/devicetree/bindings/leds/tca6507.txt
View File

@ -2,6 +2,13 @@ LEDs connected to tca6507
Required properties:
- compatible : should be : "ti,tca6507".
- #address-cells: must be 1
- #size-cells: must be 0
- reg: typically 0x45.
Optional properties:
- gpio-controller: allows lines to be used as output-only GPIOs.
- #gpio-cells: if present, must be 0.
Each led is represented as a sub-node of the ti,tca6507 device.
@ -10,6 +17,7 @@ LED sub-node properties:
- reg : number of LED line (could be from 0 to 6)
- linux,default-trigger : (optional)
see Documentation/devicetree/bindings/leds/common.txt
- compatible: either "led" (the default) or "gpio".
Examples:
@ -19,6 +27,9 @@ tca6507@45 {
#size-cells = <0>;
reg = <0x45>;
gpio-controller;
#gpio-cells = <2>;
led0: red-aux@0 {
label = "red:aux";
reg = <0x0>;
@ -29,5 +40,10 @@ tca6507@45 {
reg = <0x5>;
linux,default-trigger = "default-on";
};
wifi-reset@6 {
reg = <0x6>;
compatible = "gpio";
};
};

10
Documentation/leds/leds-lp55xx.txt
View File

@ -73,6 +73,10 @@ select_engine : Select which engine is used for running program
run_engine : Start program which is loaded via the firmware interface
firmware : Load program data
In case of LP5523, one more command is required, 'enginex_leds'.
It is used for selecting LED output(s) at each engine number.
In more details, please refer to 'leds-lp5523.txt'.
For example, run blinking pattern in engine #1 of LP5521
echo 1 > /sys/bus/i2c/devices/xxxx/select_engine
echo 1 > /sys/class/firmware/lp5521/loading
@ -81,10 +85,12 @@ echo 0 > /sys/class/firmware/lp5521/loading
echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
For example, run blinking pattern in engine #3 of LP55231
Two LEDs are configured as pattern output channels.
echo 3 > /sys/bus/i2c/devices/xxxx/select_engine
echo 1 > /sys/class/firmware/lp55231/loading
echo "9d0740ff7e0040007e00a0010000" > /sys/class/firmware/lp55231/data
echo 0 > /sys/class/firmware/lp55231/loading
echo "000001100" > /sys/bus/i2c/devices/xxxx/engine3_leds
echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
To start blinking patterns in engine #2 and #3 simultaneously,
@ -99,17 +105,19 @@ done
echo 1 > /sys/class/leds/red/device/run_engine
Here is another example for LP5523.
Full LED strings are selected by 'engine2_leds'.
echo 2 > /sys/bus/i2c/devices/xxxx/select_engine
echo 1 > /sys/class/firmware/lp5523/loading
echo "9d80400004ff05ff437f0000" > /sys/class/firmware/lp5523/data
echo 0 > /sys/class/firmware/lp5523/loading
echo "111111111" > /sys/bus/i2c/devices/xxxx/engine2_leds
echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
As soon as 'loading' is set to 0, registered callback is called.
Inside the callback, the selected engine is loaded and memory is updated.
To run programmed pattern, 'run_engine' attribute should be enabled.
The pattern sqeuence of LP8501 is same as LP5523.
The pattern sqeuence of LP8501 is similar to LP5523.
However pattern data is specific.
Ex 1) Engine 1 is used
echo 1 > /sys/bus/i2c/devices/xxxx/select_engine

16
arch/arm/mach-imx/mach-mx31moboard.c
View File

@ -236,32 +236,26 @@ static struct mc13xxx_led_platform_data moboard_led[] = {
{
.id = MC13783_LED_R1,
.name = "coreboard-led-4:red",
.max_current = 2,
},
{
.id = MC13783_LED_G1,
.name = "coreboard-led-4:green",
.max_current = 2,
},
{
.id = MC13783_LED_B1,
.name = "coreboard-led-4:blue",
.max_current = 2,
},
{
.id = MC13783_LED_R2,
.name = "coreboard-led-5:red",
.max_current = 3,
},
{
.id = MC13783_LED_G2,
.name = "coreboard-led-5:green",
.max_current = 3,
},
{
.id = MC13783_LED_B2,
.name = "coreboard-led-5:blue",
.max_current = 3,
},
};
@ -271,8 +265,14 @@ static struct mc13xxx_leds_platform_data moboard_leds = {
.led_control[0] = MC13783_LED_C0_ENABLE | MC13783_LED_C0_ABMODE(0),
.led_control[1] = MC13783_LED_C1_SLEWLIM,
.led_control[2] = MC13783_LED_C2_SLEWLIM,
.led_control[3] = MC13783_LED_C3_PERIOD(0),
.led_control[4] = MC13783_LED_C3_PERIOD(0),
.led_control[3] = MC13783_LED_C3_PERIOD(0) |
MC13783_LED_C3_CURRENT_R1(2) |
MC13783_LED_C3_CURRENT_G1(2) |
MC13783_LED_C3_CURRENT_B1(2),
.led_control[4] = MC13783_LED_C4_PERIOD(0) |
MC13783_LED_C4_CURRENT_R2(3) |
MC13783_LED_C4_CURRENT_G2(3) |
MC13783_LED_C4_CURRENT_B2(3),
};
static struct mc13xxx_buttons_platform_data moboard_buttons = {

15
drivers/leds/led-triggers.c
View File

@ -242,18 +242,14 @@ EXPORT_SYMBOL_GPL(led_trigger_unregister);
void led_trigger_event(struct led_trigger *trig,
enum led_brightness brightness)
{
struct list_head *entry;
struct led_classdev *led_cdev;
if (!trig)
return;
read_lock(&trig->leddev_list_lock);
list_for_each(entry, &trig->led_cdevs) {
struct led_classdev *led_cdev;
led_cdev = list_entry(entry, struct led_classdev, trig_list);
list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list)
led_set_brightness(led_cdev, brightness);
}
read_unlock(&trig->leddev_list_lock);
}
EXPORT_SYMBOL_GPL(led_trigger_event);
@ -264,16 +260,13 @@ static void led_trigger_blink_setup(struct led_trigger *trig,
int oneshot,
int invert)
{
struct list_head *entry;
struct led_classdev *led_cdev;
if (!trig)
return;
read_lock(&trig->leddev_list_lock);
list_for_each(entry, &trig->led_cdevs) {
struct led_classdev *led_cdev;
led_cdev = list_entry(entry, struct led_classdev, trig_list);
list_for_each_entry(led_cdev, &trig->led_cdevs, trig_list) {
if (oneshot)
led_blink_set_oneshot(led_cdev, delay_on, delay_off,
invert);

18
drivers/leds/leds-lp5521.c
View File

@ -152,12 +152,26 @@ static void lp5521_load_engine(struct lp55xx_chip *chip)
lp5521_wait_opmode_done();
}
static void lp5521_stop_engine(struct lp55xx_chip *chip)
static void lp5521_stop_all_engines(struct lp55xx_chip *chip)
{
lp55xx_write(chip, LP5521_REG_OP_MODE, 0);
lp5521_wait_opmode_done();
}
static void lp5521_stop_engine(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
u8 mask[] = {
[LP55XX_ENGINE_1] = LP5521_MODE_R_M,
[LP55XX_ENGINE_2] = LP5521_MODE_G_M,
[LP55XX_ENGINE_3] = LP5521_MODE_B_M,
};
lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], 0);
lp5521_wait_opmode_done();
}
static void lp5521_run_engine(struct lp55xx_chip *chip, bool start)
{
int ret;
@ -564,7 +578,7 @@ static int lp5521_remove(struct i2c_client *client)
struct lp55xx_led *led = i2c_get_clientdata(client);
struct lp55xx_chip *chip = led->chip;
lp5521_stop_engine(chip);
lp5521_stop_all_engines(chip);
lp55xx_unregister_sysfs(chip);
lp55xx_unregister_leds(led, chip);
lp55xx_deinit_device(chip);

20
drivers/leds/leds-lp5523.c
View File

@ -195,12 +195,26 @@ static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
}
static void lp5523_stop_engine(struct lp55xx_chip *chip)
static void lp5523_stop_all_engines(struct lp55xx_chip *chip)
{
lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
lp5523_wait_opmode_done();
}
static void lp5523_stop_engine(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
u8 mask[] = {
[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
};
lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0);
lp5523_wait_opmode_done();
}
static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
{
int i;
@ -311,7 +325,7 @@ static int lp5523_init_program_engine(struct lp55xx_chip *chip)
}
out:
lp5523_stop_engine(chip);
lp5523_stop_all_engines(chip);
return ret;
}
@ -782,7 +796,7 @@ static int lp5523_remove(struct i2c_client *client)
struct lp55xx_led *led = i2c_get_clientdata(client);
struct lp55xx_chip *chip = led->chip;
lp5523_stop_engine(chip);
lp5523_stop_all_engines(chip);
lp55xx_unregister_sysfs(chip);
lp55xx_unregister_leds(led, chip);
lp55xx_deinit_device(chip);

2
drivers/leds/leds-lp55xx-common.c
View File

@ -210,6 +210,7 @@ static void lp55xx_firmware_loaded(const struct firmware *fw, void *context)
{
struct lp55xx_chip *chip = context;
struct device *dev = &chip->cl->dev;
enum lp55xx_engine_index idx = chip->engine_idx;
if (!fw) {
dev_err(dev, "firmware request failed\n");
@ -219,6 +220,7 @@ static void lp55xx_firmware_loaded(const struct firmware *fw, void *context)
/* handling firmware data is chip dependent */
mutex_lock(&chip->lock);
chip->engines[idx - 1].mode = LP55XX_ENGINE_LOAD;
chip->fw = fw;
if (chip->cfg->firmware_cb)
chip->cfg->firmware_cb(chip);

89
drivers/leds/leds-mc13783.c
View File

@ -117,9 +117,7 @@ static void mc13xxx_led_work(struct work_struct *work)
BUG();
}
mc13xxx_lock(led->master);
mc13xxx_reg_rmw(led->master, reg, mask << shift, value << shift);
mc13xxx_unlock(led->master);
}
static void mc13xxx_led_set(struct led_classdev *led_cdev,
@ -132,75 +130,6 @@ static void mc13xxx_led_set(struct led_classdev *led_cdev,
schedule_work(&led->work);
}
static int __init mc13xxx_led_setup(struct mc13xxx_led *led, int max_current)
{
int shift, mask, reg, ret, bank;
switch (led->id) {
case MC13783_LED_MD:
reg = MC13XXX_REG_LED_CONTROL(2);
shift = 0;
mask = 0x07;
break;
case MC13783_LED_AD:
reg = MC13XXX_REG_LED_CONTROL(2);
shift = 3;
mask = 0x07;
break;
case MC13783_LED_KP:
reg = MC13XXX_REG_LED_CONTROL(2);
shift = 6;
mask = 0x07;
break;
case MC13783_LED_R1:
case MC13783_LED_G1:
case MC13783_LED_B1:
case MC13783_LED_R2:
case MC13783_LED_G2:
case MC13783_LED_B2:
case MC13783_LED_R3:
case MC13783_LED_G3:
case MC13783_LED_B3:
bank = (led->id - MC13783_LED_R1) / 3;
reg = MC13XXX_REG_LED_CONTROL(3) + bank;
shift = ((led->id - MC13783_LED_R1) - bank * 3) * 2;
mask = 0x03;
break;
case MC13892_LED_MD:
reg = MC13XXX_REG_LED_CONTROL(0);
shift = 9;
mask = 0x07;
break;
case MC13892_LED_AD:
reg = MC13XXX_REG_LED_CONTROL(0);
shift = 21;
mask = 0x07;
break;
case MC13892_LED_KP:
reg = MC13XXX_REG_LED_CONTROL(1);
shift = 9;
mask = 0x07;
break;
case MC13892_LED_R:
case MC13892_LED_G:
case MC13892_LED_B:
bank = (led->id - MC13892_LED_R) / 2;
reg = MC13XXX_REG_LED_CONTROL(2) + bank;
shift = ((led->id - MC13892_LED_R) - bank * 2) * 12 + 9;
mask = 0x07;
break;
default:
BUG();
}
mc13xxx_lock(led->master);
ret = mc13xxx_reg_rmw(led->master, reg, mask << shift,
max_current << shift);
mc13xxx_unlock(led->master);
return ret;
}
static int __init mc13xxx_led_probe(struct platform_device *pdev)
{
struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
@ -233,31 +162,22 @@ static int __init mc13xxx_led_probe(struct platform_device *pdev)
leds->num_leds = num_leds;
platform_set_drvdata(pdev, leds);
mc13xxx_lock(mcdev);
for (i = 0; i < devtype->num_regs; i++) {
reg = pdata->led_control[i];
WARN_ON(reg >= (1 << 24));
ret = mc13xxx_reg_write(mcdev, MC13XXX_REG_LED_CONTROL(i), reg);
if (ret)
break;
}
mc13xxx_unlock(mcdev);
if (ret) {
dev_err(&pdev->dev, "Unable to init LED driver\n");
return ret;
return ret;
}
for (i = 0; i < num_leds; i++) {
const char *name, *trig;
char max_current;
ret = -EINVAL;
id = pdata->led[i].id;
name = pdata->led[i].name;
trig = pdata->led[i].default_trigger;
max_current = pdata->led[i].max_current;
if ((id > devtype->led_max) || (id < devtype->led_min)) {
dev_err(&pdev->dev, "Invalid ID %i\n", id);
@ -280,11 +200,6 @@ static int __init mc13xxx_led_probe(struct platform_device *pdev)
INIT_WORK(&leds->led[i].work, mc13xxx_led_work);
ret = mc13xxx_led_setup(&leds->led[i], max_current);
if (ret) {
dev_err(&pdev->dev, "Unable to setup LED %i\n", id);
break;
}
ret = led_classdev_register(pdev->dev.parent,
&leds->led[i].cdev);
if (ret) {
@ -313,10 +228,8 @@ static int mc13xxx_led_remove(struct platform_device *pdev)
cancel_work_sync(&leds->led[i].work);
}
mc13xxx_lock(mcdev);
for (i = 0; i < leds->devtype->num_regs; i++)
mc13xxx_reg_write(mcdev, MC13XXX_REG_LED_CONTROL(i), 0);
mc13xxx_unlock(mcdev);
return 0;
}

9
drivers/leds/leds-pwm.c
View File

@ -66,9 +66,11 @@ static void led_pwm_set(struct led_classdev *led_cdev,
struct led_pwm_data *led_dat =
container_of(led_cdev, struct led_pwm_data, cdev);
unsigned int max = led_dat->cdev.max_brightness;
unsigned int period = led_dat->period;
unsigned long long duty = led_dat->period;
led_dat->duty = brightness * period / max;
duty *= brightness;
do_div(duty, max);
led_dat->duty = duty;
if (led_dat->can_sleep)
schedule_work(&led_dat->work);
@ -85,11 +87,10 @@ static inline size_t sizeof_pwm_leds_priv(int num_leds)
static int led_pwm_create_of(struct platform_device *pdev,
struct led_pwm_priv *priv)
{
struct device_node *node = pdev->dev.of_node;
struct device_node *child;
int ret;
for_each_child_of_node(node, child) {
for_each_child_of_node(pdev->dev.of_node, child) {
struct led_pwm_data *led_dat = &priv->leds[priv->num_leds];
led_dat->cdev.name = of_get_property(child, "label",

3
drivers/leds/leds-s3c24xx.c
View File

@ -18,11 +18,10 @@
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_data/leds-s3c24xx.h>
#include <mach/hardware.h>
#include <mach/regs-gpio.h>
#include <plat/gpio-cfg.h>
#include <linux/platform_data/leds-s3c24xx.h>
/* our context */

205
drivers/leds/leds-tca6507.c
View File

@ -4,77 +4,87 @@
* The TCA6507 is a programmable LED controller that can drive 7
* separate lines either by holding them low, or by pulsing them
* with modulated width.
* The modulation can be varied in a simple pattern to produce a blink or
* double-blink.
* The modulation can be varied in a simple pattern to produce a
* blink or double-blink.
*
* This driver can configure each line either as a 'GPIO' which is out-only
* (no pull-up) or as an LED with variable brightness and hardware-assisted
* blinking.
* This driver can configure each line either as a 'GPIO' which is
* out-only (pull-up resistor required) or as an LED with variable
* brightness and hardware-assisted blinking.
*
* Apart from OFF and ON there are three programmable brightness levels which
* can be programmed from 0 to 15 and indicate how many 500usec intervals in
* each 8msec that the led is 'on'. The levels are named MASTER, BANK0 and
* BANK1.
* Apart from OFF and ON there are three programmable brightness
* levels which can be programmed from 0 to 15 and indicate how many
* 500usec intervals in each 8msec that the led is 'on'. The levels
* are named MASTER, BANK0 and BANK1.
*
* There are two different blink rates that can be programmed, each with
* separate time for rise, on, fall, off and second-off. Thus if 3 or more
* different non-trivial rates are required, software must be used for the extra
* rates. The two different blink rates must align with the two levels BANK0 and
* BANK1.
* This driver does not support double-blink so 'second-off' always matches
* 'off'.
* There are two different blink rates that can be programmed, each
* with separate time for rise, on, fall, off and second-off. Thus if
* 3 or more different non-trivial rates are required, software must
* be used for the extra rates. The two different blink rates must
* align with the two levels BANK0 and BANK1. This driver does not
* support double-blink so 'second-off' always matches 'off'.
*
* Only 16 different times can be programmed in a roughly logarithmic scale from
* 64ms to 16320ms. To be precise the possible times are:
* Only 16 different times can be programmed in a roughly logarithmic
* scale from 64ms to 16320ms. To be precise the possible times are:
* 0, 64, 128, 192, 256, 384, 512, 768,
* 1024, 1536, 2048, 3072, 4096, 5760, 8128, 16320
*
* Times that cannot be closely matched with these must be
* handled in software. This driver allows 12.5% error in matching.
* Times that cannot be closely matched with these must be handled in
* software. This driver allows 12.5% error in matching.
*
* This driver does not allow rise/fall rates to be set explicitly. When trying
* to match a given 'on' or 'off' period, an appropriate pair of 'change' and
* 'hold' times are chosen to get a close match. If the target delay is even,
* the 'change' number will be the smaller; if odd, the 'hold' number will be
* the smaller.
* This driver does not allow rise/fall rates to be set explicitly.
* When trying to match a given 'on' or 'off' period, an appropriate
* pair of 'change' and 'hold' times are chosen to get a close match.
* If the target delay is even, the 'change' number will be the
* smaller; if odd, the 'hold' number will be the smaller.
* Choosing pairs of delays with 12.5% errors allows us to match delays in the
* ranges: 56-72, 112-144, 168-216, 224-27504, 28560-36720.
* 26% of the achievable sums can be matched by multiple pairings. For example
* 1536 == 1536+0, 1024+512, or 768+768. This driver will always choose the
* pairing with the least maximum - 768+768 in this case. Other pairings are
* not available.
* Choosing pairs of delays with 12.5% errors allows us to match
* delays in the ranges: 56-72, 112-144, 168-216, 224-27504,
* 28560-36720.
* 26% of the achievable sums can be matched by multiple pairings.
* For example 1536 == 1536+0, 1024+512, or 768+768.
* This driver will always choose the pairing with the least
* maximum - 768+768 in this case. Other pairings are not available.
*
* Access to the 3 levels and 2 blinks are on a first-come, first-served basis.
* Access can be shared by multiple leds if they have the same level and
* either same blink rates, or some don't blink.
* When a led changes, it relinquishes access and tries again, so it might
* lose access to hardware blink.
* If a blink engine cannot be allocated, software blink is used.
* If the desired brightness cannot be allocated, the closest available non-zero
* brightness is used. As 'full' is always available, the worst case would be
* to have two different blink rates at '1', with Max at '2', then other leds
* will have to choose between '2' and '16'. Hopefully this is not likely.
* Access to the 3 levels and 2 blinks are on a first-come,
* first-served basis. Access can be shared by multiple leds if they
* have the same level and either same blink rates, or some don't
* blink. When a led changes, it relinquishes access and tries again,
* so it might lose access to hardware blink.
*
* Each bank (BANK0 and BANK1) has two usage counts - LEDs using the brightness
* and LEDs using the blink. It can only be reprogrammed when the appropriate
* counter is zero. The MASTER level has a single usage count.
* If a blink engine cannot be allocated, software blink is used. If
* the desired brightness cannot be allocated, the closest available
* non-zero brightness is used. As 'full' is always available, the
* worst case would be to have two different blink rates at '1', with
* Max at '2', then other leds will have to choose between '2' and
* '16'. Hopefully this is not likely.
*
* Each Led has programmable 'on' and 'off' time as milliseconds. With each
* there is a flag saying if it was explicitly requested or defaulted.
* Similarly the banks know if each time was explicit or a default. Defaults
* are permitted to be changed freely - they are not recognised when matching.
* Each bank (BANK0 and BANK1) has two usage counts - LEDs using the
* brightness and LEDs using the blink. It can only be reprogrammed
* when the appropriate counter is zero. The MASTER level has a
* single usage count.
*
* Each LED has programmable 'on' and 'off' time as milliseconds.
* With each there is a flag saying if it was explicitly requested or
* defaulted. Similarly the banks know if each time was explicit or a
* default. Defaults are permitted to be changed freely - they are
* not recognised when matching.
*
*
* An led-tca6507 device must be provided with platform data. This data
* lists for each output: the name, default trigger, and whether the signal
* is being used as a GPiO rather than an led. 'struct led_plaform_data'
* is used for this. If 'name' is NULL, the output isn't used. If 'flags'
* is TCA6507_MAKE_CPIO, the output is a GPO.
* The "struct led_platform_data" can be embedded in a
* "struct tca6507_platform_data" which adds a 'gpio_base' for the GPiOs,
* and a 'setup' callback which is called once the GPiOs are available.
* An led-tca6507 device must be provided with platform data or
* configured via devicetree.
*
* The platform-data lists for each output: the name, default trigger,
* and whether the signal is being used as a GPIO rather than an LED.
* 'struct led_plaform_data' is used for this. If 'name' is NULL, the
* output isn't used. If 'flags' is TCA6507_MAKE_GPIO, the output is
* a GPO. The "struct led_platform_data" can be embedded in a "struct
* tca6507_platform_data" which adds a 'gpio_base' for the GPIOs, and
* a 'setup' callback which is called once the GPIOs are available.
*
* When configured via devicetree there is one child for each output.
* The "reg" determines the output number and "compatible" determines
* whether it is an LED or a GPIO. "linux,default-trigger" can set a
* default trigger.
*/
#include <linux/module.h>
@ -192,17 +202,18 @@ MODULE_DEVICE_TABLE(i2c, tca6507_id);
static int choose_times(int msec, int *c1p, int *c2p)
{
/*
* Choose two timecodes which add to 'msec' as near as possible.
* The first returned is the 'on' or 'off' time. The second is to be
* used as a 'fade-on' or 'fade-off' time. If 'msec' is even,
* the first will not be smaller than the second. If 'msec' is odd,
* the first will not be larger than the second.
* If we cannot get a sum within 1/8 of 'msec' fail with -EINVAL,
* otherwise return the sum that was achieved, plus 1 if the first is
* smaller.
* If two possibilities are equally good (e.g. 512+0, 256+256), choose
* the first pair so there is more change-time visible (i.e. it is
* softer).
* Choose two timecodes which add to 'msec' as near as
* possible. The first returned is the 'on' or 'off' time.
* The second is to be used as a 'fade-on' or 'fade-off' time.
* If 'msec' is even, the first will not be smaller than the
* second. If 'msec' is odd, the first will not be larger
* than the second.
* If we cannot get a sum within 1/8 of 'msec' fail with
* -EINVAL, otherwise return the sum that was achieved, plus 1
* if the first is smaller.
* If two possibilities are equally good (e.g. 512+0,
* 256+256), choose the first pair so there is more
* change-time visible (i.e. it is softer).
*/
int c1, c2;
int tmax = msec * 9 / 8;
@ -255,8 +266,8 @@ static int choose_times(int msec, int *c1p, int *c2p)
}
/*
* Update the register file with the appropriate 3-bit state for
* the given led.
* Update the register file with the appropriate 3-bit state for the
* given led.
*/
static void set_select(struct tca6507_chip *tca, int led, int val)
{
@ -274,9 +285,9 @@ static void set_select(struct tca6507_chip *tca, int led, int val)
}
}
/* Update the register file with the appropriate 4-bit code for
* one bank or other. This can be used for timers, for levels, or
* for initialisation.
/* Update the register file with the appropriate 4-bit code for one
* bank or other. This can be used for timers, for levels, or for
* initialization.
*/
static void set_code(struct tca6507_chip *tca, int reg, int bank, int new)
{
@ -309,7 +320,7 @@ static void set_level(struct tca6507_chip *tca, int bank, int level)
tca->bank[bank].level = level;
}
/* Record all relevant time code for a given bank */
/* Record all relevant time codes for a given bank */
static void set_times(struct tca6507_chip *tca, int bank)
{
int c1, c2;
@ -317,7 +328,8 @@ static void set_times(struct tca6507_chip *tca, int bank)
result = choose_times(tca->bank[bank].ontime, &c1, &c2);
dev_dbg(&tca->client->dev,
"Chose on times %d(%d) %d(%d) for %dms\n", c1, time_codes[c1],
"Chose on times %d(%d) %d(%d) for %dms\n",
c1, time_codes[c1],
c2, time_codes[c2], tca->bank[bank].ontime);
set_code(tca, TCA6507_FADE_ON, bank, c2);
set_code(tca, TCA6507_FULL_ON, bank, c1);
@ -325,7 +337,8 @@ static void set_times(struct tca6507_chip *tca, int bank)
result = choose_times(tca->bank[bank].offtime, &c1, &c2);
dev_dbg(&tca->client->dev,
"Chose off times %d(%d) %d(%d) for %dms\n", c1, time_codes[c1],
"Chose off times %d(%d) %d(%d) for %dms\n",
c1, time_codes[c1],
c2, time_codes[c2], tca->bank[bank].offtime);
set_code(tca, TCA6507_FADE_OFF, bank, c2);
set_code(tca, TCA6507_FIRST_OFF, bank, c1);
@ -373,7 +386,8 @@ static void led_release(struct tca6507_led *led)
static int led_prepare(struct tca6507_led *led)
{
/* Assign this led to a bank, configuring that bank if necessary. */
/* Assign this led to a bank, configuring that bank if
* necessary. */
int level = TO_LEVEL(led->led_cdev.brightness);
struct tca6507_chip *tca = led->chip;
int c1, c2;
@ -389,10 +403,10 @@ static int led_prepare(struct tca6507_led *led)
if (led->ontime == 0 || led->offtime == 0) {
/*
* Just set the brightness, choosing first usable bank.
* If none perfect, choose best.
* Count backwards so we check MASTER bank first
* to avoid wasting a timer.
* Just set the brightness, choosing first usable
* bank. If none perfect, choose best. Count
* backwards so we check MASTER bank first to avoid
* wasting a timer.
*/
int best = -1;/* full-on */
int diff = 15-level;
@ -433,9 +447,9 @@ static int led_prepare(struct tca6507_led *led)
}
/*
* We have on/off time so we need to try to allocate a timing bank.
* First check if times are compatible with hardware and give up if
* not.
* We have on/off time so we need to try to allocate a timing
* bank. First check if times are compatible with hardware
* and give up if not.
*/
if (choose_times(led->ontime, &c1, &c2) < 0)
return -EINVAL;
@ -523,8 +537,8 @@ static int led_assign(struct tca6507_led *led)
err = led_prepare(led);
if (err) {
/*
* Can only fail on timer setup. In that case we need to
* re-establish as steady level.
* Can only fail on timer setup. In that case we need
* to re-establish as steady level.
*/
led->ontime = 0;
led->offtime = 0;
@ -594,8 +608,8 @@ static void tca6507_gpio_set_value(struct gpio_chip *gc,
spin_lock_irqsave(&tca->lock, flags);
/*
* 'OFF' is floating high, and 'ON' is pulled down, so it has the
* inverse sense of 'val'.
* 'OFF' is floating high, and 'ON' is pulled down, so it has
* the inverse sense of 'val'.
*/
set_select(tca, tca->gpio_map[offset],
val ? TCA6507_LS_LED_OFF : TCA6507_LS_LED_ON);
@ -638,6 +652,9 @@ static int tca6507_probe_gpios(struct i2c_client *client,
tca->gpio.direction_output = tca6507_gpio_direction_output;
tca->gpio.set = tca6507_gpio_set_value;
tca->gpio.dev = &client->dev;
#ifdef CONFIG_OF_GPIO
tca->gpio.of_node = of_node_get(client->dev.of_node);
#endif
err = gpiochip_add(&tca->gpio);
if (err) {
tca->gpio.ngpio = 0;
@ -682,7 +699,7 @@ tca6507_led_dt_init(struct i2c_client *client)
return ERR_PTR(-ENODEV);
tca_leds = devm_kzalloc(&client->dev,
sizeof(struct led_info) * count, GFP_KERNEL);
sizeof(struct led_info) * NUM_LEDS, GFP_KERNEL);
if (!tca_leds)
return ERR_PTR(-ENOMEM);
@ -695,9 +712,11 @@ tca6507_led_dt_init(struct i2c_client *client)
of_get_property(child, "label", NULL) ? : child->name;
led.default_trigger =
of_get_property(child, "linux,default-trigger", NULL);
led.flags = 0;
if (of_property_match_string(child, "compatible", "gpio") >= 0)
led.flags |= TCA6507_MAKE_GPIO;
ret = of_property_read_u32(child, "reg", &reg);
if (ret != 0)
if (ret != 0 || reg < 0 || reg >= NUM_LEDS)
continue;
tca_leds[reg] = led;
@ -708,8 +727,10 @@ tca6507_led_dt_init(struct i2c_client *client)
return ERR_PTR(-ENOMEM);
pdata->leds.leds = tca_leds;
pdata->leds.num_leds = count;
pdata->leds.num_leds = NUM_LEDS;
#ifdef CONFIG_GPIOLIB
pdata->gpio_base = -1;
#endif
return pdata;
}

37
include/linux/mfd/mc13xxx.h
View File

@ -110,9 +110,6 @@ struct mc13xxx_led_platform_data {
int id;
const char *name;
const char *default_trigger;
/* Three or two bits current selection depending on the led */
char max_current;
};
#define MAX_LED_CONTROL_REGS 6
@ -121,7 +118,7 @@ struct mc13xxx_leds_platform_data {
struct mc13xxx_led_platform_data *led;
int num_leds;
/* LED Control 0 */
/* MC13783 LED Control 0 */
#define MC13783_LED_C0_ENABLE (1 << 0)
#define MC13783_LED_C0_TRIODE_MD (1 << 7)
#define MC13783_LED_C0_TRIODE_AD (1 << 8)
@ -129,21 +126,43 @@ struct mc13xxx_leds_platform_data {
#define MC13783_LED_C0_BOOST (1 << 10)
#define MC13783_LED_C0_ABMODE(x) (((x) & 0x7) << 11)
#define MC13783_LED_C0_ABREF(x) (((x) & 0x3) << 14)
/* LED Control 1 */
/* MC13783 LED Control 1 */
#define MC13783_LED_C1_TC1HALF (1 << 18)
#define MC13783_LED_C1_SLEWLIM (1 << 23)
/* LED Control 2 */
/* MC13783 LED Control 2 */
#define MC13783_LED_C2_CURRENT_MD(x) (((x) & 0x7) << 0)
#define MC13783_LED_C2_CURRENT_AD(x) (((x) & 0x7) << 3)
#define MC13783_LED_C2_CURRENT_KP(x) (((x) & 0x7) << 6)
#define MC13783_LED_C2_PERIOD(x) (((x) & 0x3) << 21)
#define MC13783_LED_C2_SLEWLIM (1 << 23)
/* LED Control 3 */
/* MC13783 LED Control 3 */
#define MC13783_LED_C3_CURRENT_R1(x) (((x) & 0x3) << 0)
#define MC13783_LED_C3_CURRENT_G1(x) (((x) & 0x3) << 2)
#define MC13783_LED_C3_CURRENT_B1(x) (((x) & 0x3) << 4)
#define MC13783_LED_C3_PERIOD(x) (((x) & 0x3) << 21)
#define MC13783_LED_C3_TRIODE_TC1 (1 << 23)
/* LED Control 4 */
/* MC13783 LED Control 4 */
#define MC13783_LED_C4_CURRENT_R2(x) (((x) & 0x3) << 0)
#define MC13783_LED_C4_CURRENT_G2(x) (((x) & 0x3) << 2)
#define MC13783_LED_C4_CURRENT_B2(x) (((x) & 0x3) << 4)
#define MC13783_LED_C4_PERIOD(x) (((x) & 0x3) << 21)
#define MC13783_LED_C4_TRIODE_TC2 (1 << 23)
/* LED Control 5 */
/* MC13783 LED Control 5 */
#define MC13783_LED_C5_CURRENT_R3(x) (((x) & 0x3) << 0)
#define MC13783_LED_C5_CURRENT_G3(x) (((x) & 0x3) << 2)
#define MC13783_LED_C5_CURRENT_B3(x) (((x) & 0x3) << 4)
#define MC13783_LED_C5_PERIOD(x) (((x) & 0x3) << 21)
#define MC13783_LED_C5_TRIODE_TC3 (1 << 23)
/* MC13892 LED Control 0 */
#define MC13892_LED_C0_CURRENT_MD(x) (((x) & 0x7) << 9)
#define MC13892_LED_C0_CURRENT_AD(x) (((x) & 0x7) << 21)
/* MC13892 LED Control 1 */
#define MC13892_LED_C1_CURRENT_KP(x) (((x) & 0x7) << 9)
/* MC13892 LED Control 2 */
#define MC13892_LED_C2_CURRENT_R(x) (((x) & 0x7) << 9)
#define MC13892_LED_C2_CURRENT_G(x) (((x) & 0x7) << 21)
/* MC13892 LED Control 3 */
#define MC13892_LED_C3_CURRENT_B(x) (((x) & 0x7) << 9)
u32 led_control[MAX_LED_CONTROL_REGS];
};

8
include/linux/platform_data/leds-kirkwood-netxbig.h
View File

@ -1,6 +1,4 @@
/*
* arch/arm/mach-kirkwood/include/mach/leds-netxbig.h
*
* Platform data structure for netxbig LED driver
*
* This file is licensed under the terms of the GNU General Public
@ -8,8 +6,8 @@
* warranty of any kind, whether express or implied.
*/
#ifndef __MACH_LEDS_NETXBIG_H
#define __MACH_LEDS_NETXBIG_H
#ifndef __LEDS_KIRKWOOD_NETXBIG_H
#define __LEDS_KIRKWOOD_NETXBIG_H
struct netxbig_gpio_ext {
unsigned *addr;
@ -52,4 +50,4 @@ struct netxbig_led_platform_data {
int num_leds;
};
#endif /* __MACH_LEDS_NETXBIG_H */
#endif /* __LEDS_KIRKWOOD_NETXBIG_H */

8
include/linux/platform_data/leds-kirkwood-ns2.h
View File

@ -1,6 +1,4 @@
/*
* arch/arm/mach-kirkwood/include/mach/leds-ns2.h
*
* Platform data structure for Network Space v2 LED driver
*
* This file is licensed under the terms of the GNU General Public
@ -8,8 +6,8 @@
* warranty of any kind, whether express or implied.
*/
#ifndef __MACH_LEDS_NS2_H
#define __MACH_LEDS_NS2_H
#ifndef __LEDS_KIRKWOOD_NS2_H
#define __LEDS_KIRKWOOD_NS2_H
struct ns2_led {
const char *name;
@ -23,4 +21,4 @@ struct ns2_led_platform_data {
struct ns2_led *leds;
};
#endif /* __MACH_LEDS_NS2_H */
#endif /* __LEDS_KIRKWOOD_NS2_H */