* [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems
@ 2013-08-14 21:23 Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 1/5] leds-pca9633: Add support for PCA9634 Ricardo Ribalda Delgado
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2013-08-14 21:23 UTC (permalink / raw)
To: Bryan Wu, Peter Meerwald, Richard Purdie, Linux LED Subsystem, LKML
Cc: Ricardo Ribalda Delgado
Add Support for the PCA9634 chip. Simimart to the 9633, but with 8 outputs instead of 4.
Fix bug when 2 chips where present on the system, the ledclass will fail and the chip wont probe.
Protect ledout register with a mutex to support updates of more than leds at the same time
Fix device tree parsing
v5: Contains feedback from Bryan Wu
Bryan: Fix device tree bindings documentation
v4: Rebase to latest leds-next and new patch to Fix the dt parsing
v3: Contains feedback from Bryan Wu
Bryan: Rename pca9633 to pca963x
v2: Contains feedback from Peter Meerwald
Peter: Fix typo on commit message. Add bus number to name
Ricardo Ribalda Delgado (5):
leds-pca9633: Add support for PCA9634
leds-pca9633: Unique naming of the LEDs
leds-pca9633: Add mutex to the ledout register
leds-pca9633: Rename to leds-pca963x
leds-pca963x: Fix device tree parsing
Documentation/devicetree/bindings/leds/pca9633.txt | 46 --
Documentation/devicetree/bindings/leds/pca963x.txt | 47 ++
drivers/leds/Kconfig | 9 +-
drivers/leds/Makefile | 2 +-
drivers/leds/leds-pca9633.c | 393 -----------------
drivers/leds/leds-pca963x.c | 461 ++++++++++++++++++++
include/linux/platform_data/leds-pca9633.h | 41 --
include/linux/platform_data/leds-pca963x.h | 42 ++
8 files changed, 556 insertions(+), 485 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/leds/pca9633.txt
create mode 100644 Documentation/devicetree/bindings/leds/pca963x.txt
delete mode 100644 drivers/leds/leds-pca9633.c
create mode 100644 drivers/leds/leds-pca963x.c
delete mode 100644 include/linux/platform_data/leds-pca9633.h
create mode 100644 include/linux/platform_data/leds-pca963x.h
--
1.7.10.4
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH v5 1/5] leds-pca9633: Add support for PCA9634
2013-08-14 21:23 [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Ricardo Ribalda Delgado
@ 2013-08-14 21:23 ` Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 2/5] leds-pca9633: Unique naming of the LEDs Ricardo Ribalda Delgado
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2013-08-14 21:23 UTC (permalink / raw)
To: Bryan Wu, Peter Meerwald, Richard Purdie, Linux LED Subsystem, LKML
Cc: Ricardo Ribalda Delgado
Add support for PCA9634 chip, which belongs to the same family as the
9633 but with support for 8 outputs instead of 4.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
Documentation/devicetree/bindings/leds/pca9633.txt | 11 +-
drivers/leds/Kconfig | 7 +-
drivers/leds/leds-pca9633.c | 108 ++++++++++++++------
3 files changed, 85 insertions(+), 41 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/pca9633.txt b/Documentation/devicetree/bindings/leds/pca9633.txt
index 6d9e1a9..aece3ea 100644
--- a/Documentation/devicetree/bindings/leds/pca9633.txt
+++ b/Documentation/devicetree/bindings/leds/pca9633.txt
@@ -1,24 +1,25 @@
-LEDs connected to pca9633 or pca9632
+LEDs connected to pca9632, pca9633 or pca9634
Required properties:
-- compatible : should be : "nxp,pca963x"
+- compatible : should be : "nxp,pca9632", "nxp,pca9633" or "nxp,pca9634"
Optional properties:
- nxp,totem-pole : use totem pole (push-pull) instead of default open-drain
- nxp,hw-blink : use hardware blinking instead of software blinking
-Each led is represented as a sub-node of the nxp,pca9633 device.
+Each led is represented as a sub-node of the nxp,pca963x device.
LED sub-node properties:
- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
-- reg : number of LED line (could be from 0 to 4)
+- reg : number of LED line (could be from 0 to 3 in pca9632 or pca9633
+ or 0 to 7 in pca9634)
- linux,default-trigger : (optional)
see Documentation/devicetree/bindings/leds/common.txt
Examples:
pca9632: pca9632 {
- compatible = "nxp,pca9632", "nxp,pca963x";
+ compatible = "nxp,pca9632";
#address-cells = <1>;
#size-cells = <0>;
reg = <0x62>;
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index f2c738d..e7977aa 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -292,12 +292,13 @@ config LEDS_PCA955X
devices include PCA9550, PCA9551, PCA9552, and PCA9553.
config LEDS_PCA9633
- tristate "LED support for PCA9633 I2C chip"
+ tristate "LED support for PCA963x I2C chip"
depends on LEDS_CLASS
depends on I2C
help
- This option enables support for LEDs connected to the PCA9633
- LED driver chip accessed via the I2C bus.
+ This option enables support for LEDs connected to the PCA963x
+ LED driver chip accessed via the I2C bus. Supported
+ devices include PCA9633 and PCA9634
config LEDS_WM831X_STATUS
tristate "LED support for status LEDs on WM831x PMICs"
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c
index ecd1449..e59ca0a 100644
--- a/drivers/leds/leds-pca9633.c
+++ b/drivers/leds/leds-pca9633.c
@@ -1,7 +1,9 @@
/*
* Copyright 2011 bct electronic GmbH
+ * Copyright 2013 Qtechnology/AS
*
* Author: Peter Meerwald <p.meerwald@bct-electronic.com>
+ * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
*
* Based on leds-pca955x.c
*
@@ -10,6 +12,7 @@
* directory of this archive for more details.
*
* LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
+ * LED driver for the PCA9634 I2C LED driver (7-bit slave address set by hw.)
*
* Note that hardware blinking violates the leds infrastructure driver
* interface since the hardware only supports blinking all LEDs with the
@@ -45,16 +48,42 @@
#define PCA9633_MODE1 0x00
#define PCA9633_MODE2 0x01
#define PCA9633_PWM_BASE 0x02
-#define PCA9633_GRPPWM 0x06
-#define PCA9633_GRPFREQ 0x07
-#define PCA9633_LEDOUT 0x08
+
+enum pca9633_type {
+ pca9633,
+ pca9634,
+};
+
+struct pca9633_chipdef {
+ u8 grppwm;
+ u8 grpfreq;
+ u8 ledout_base;
+ int n_leds;
+};
+
+static struct pca9633_chipdef pca9633_chipdefs[] = {
+ [pca9633] = {
+ .grppwm = 0x6,
+ .grpfreq = 0x7,
+ .ledout_base = 0x8,
+ .n_leds = 4,
+ },
+ [pca9634] = {
+ .grppwm = 0xa,
+ .grpfreq = 0xb,
+ .ledout_base = 0xc,
+ .n_leds = 8,
+ },
+};
/* Total blink period in milliseconds */
#define PCA9632_BLINK_PERIOD_MIN 42
#define PCA9632_BLINK_PERIOD_MAX 10667
static const struct i2c_device_id pca9633_id[] = {
- { "pca9633", 0 },
+ { "pca9632", pca9633 },
+ { "pca9633", pca9633 },
+ { "pca9634", pca9634 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pca9633_id);
@@ -66,10 +95,11 @@ enum pca9633_cmd {
struct pca9633_led {
struct i2c_client *client;
+ struct pca9633_chipdef *chipdef;
struct work_struct work;
enum led_brightness brightness;
struct led_classdev led_cdev;
- int led_num; /* 0 .. 3 potentially */
+ int led_num; /* 0 .. 7 potentially */
enum pca9633_cmd cmd;
char name[32];
u8 gdc;
@@ -78,24 +108,26 @@ struct pca9633_led {
static void pca9633_brightness_work(struct pca9633_led *pca9633)
{
- u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT);
- int shift = 2 * pca9633->led_num;
+ u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4);
+ u8 ledout;
+ int shift = 2 * (pca9633->led_num % 4);
u8 mask = 0x3 << shift;
+ ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr);
switch (pca9633->brightness) {
case LED_FULL:
- i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
+ i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
(ledout & ~mask) | (PCA9633_LED_ON << shift));
break;
case LED_OFF:
- i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
+ i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
ledout & ~mask);
break;
default:
i2c_smbus_write_byte_data(pca9633->client,
PCA9633_PWM_BASE + pca9633->led_num,
pca9633->brightness);
- i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
+ i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
(ledout & ~mask) | (PCA9633_LED_PWM << shift));
break;
}
@@ -103,15 +135,16 @@ static void pca9633_brightness_work(struct pca9633_led *pca9633)
static void pca9633_blink_work(struct pca9633_led *pca9633)
{
- u8 ledout = i2c_smbus_read_byte_data(pca9633->client, PCA9633_LEDOUT);
+ u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4);
+ u8 ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr);
u8 mode2 = i2c_smbus_read_byte_data(pca9633->client, PCA9633_MODE2);
- int shift = 2 * pca9633->led_num;
+ int shift = 2 * (pca9633->led_num % 4);
u8 mask = 0x3 << shift;
- i2c_smbus_write_byte_data(pca9633->client, PCA9633_GRPPWM,
+ i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grppwm,
pca9633->gdc);
- i2c_smbus_write_byte_data(pca9633->client, PCA9633_GRPFREQ,
+ i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grpfreq,
pca9633->gfrq);
if (!(mode2 & PCA9633_MODE2_DMBLNK))
@@ -119,7 +152,7 @@ static void pca9633_blink_work(struct pca9633_led *pca9633)
mode2 | PCA9633_MODE2_DMBLNK);
if ((ledout & mask) != (PCA9633_LED_GRP_PWM << shift))
- i2c_smbus_write_byte_data(pca9633->client, PCA9633_LEDOUT,
+ i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
(ledout & ~mask) | (PCA9633_LED_GRP_PWM << shift));
}
@@ -215,7 +248,7 @@ static int pca9633_blink_set(struct led_classdev *led_cdev,
#if IS_ENABLED(CONFIG_OF)
static struct pca9633_platform_data *
-pca9633_dt_init(struct i2c_client *client)
+pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
{
struct device_node *np = client->dev.of_node, *child;
struct pca9633_platform_data *pdata;
@@ -223,11 +256,11 @@ pca9633_dt_init(struct i2c_client *client)
int count;
count = of_get_child_count(np);
- if (!count || count > 4)
+ if (!count || count > chip->n_leds)
return ERR_PTR(-ENODEV);
pca9633_leds = devm_kzalloc(&client->dev,
- sizeof(struct led_info) * count, GFP_KERNEL);
+ sizeof(struct led_info) * chip->n_leds, GFP_KERNEL);
if (!pca9633_leds)
return ERR_PTR(-ENOMEM);
@@ -269,12 +302,14 @@ pca9633_dt_init(struct i2c_client *client)
}
static const struct of_device_id of_pca9633_match[] = {
- { .compatible = "nxp,pca963x", },
+ { .compatible = "nxp,pca9632", },
+ { .compatible = "nxp,pca9633", },
+ { .compatible = "nxp,pca9634", },
{},
};
#else
static struct pca9633_platform_data *
-pca9633_dt_init(struct i2c_client *client)
+pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
{
return ERR_PTR(-ENODEV);
}
@@ -285,34 +320,38 @@ static int pca9633_probe(struct i2c_client *client,
{
struct pca9633_led *pca9633;
struct pca9633_platform_data *pdata;
+ struct pca9633_chipdef *chip;
int i, err;
+ chip = &pca9633_chipdefs[id->driver_data];
pdata = dev_get_platdata(&client->dev);
if (!pdata) {
- pdata = pca9633_dt_init(client);
+ pdata = pca9633_dt_init(client, chip);
if (IS_ERR(pdata)) {
dev_warn(&client->dev, "could not parse configuration\n");
pdata = NULL;
}
}
- if (pdata) {
- if (pdata->leds.num_leds <= 0 || pdata->leds.num_leds > 4) {
- dev_err(&client->dev, "board info must claim at most 4 LEDs");
- return -EINVAL;
- }
+ if (pdata && (pdata->leds.num_leds < 1 ||
+ pdata->leds.num_leds > chip->n_leds)) {
+ dev_err(&client->dev, "board info must claim 1-%d LEDs",
+ chip->n_leds);
+ return -EINVAL;
}
- pca9633 = devm_kzalloc(&client->dev, 4 * sizeof(*pca9633), GFP_KERNEL);
+ pca9633 = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca9633),
+ GFP_KERNEL);
if (!pca9633)
return -ENOMEM;
i2c_set_clientdata(client, pca9633);
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < chip->n_leds; i++) {
pca9633[i].client = client;
pca9633[i].led_num = i;
+ pca9633[i].chipdef = chip;
/* Platform data can specify LED names and default triggers */
if (pdata && i < pdata->leds.num_leds) {
@@ -349,7 +388,9 @@ static int pca9633_probe(struct i2c_client *client,
i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01);
/* Turn off LEDs */
- i2c_smbus_write_byte_data(client, PCA9633_LEDOUT, 0x00);
+ i2c_smbus_write_byte_data(client, chip->ledout_base, 0x00);
+ if (chip->n_leds > 4)
+ i2c_smbus_write_byte_data(client, chip->ledout_base + 1, 0x00);
return 0;
@@ -367,10 +408,11 @@ static int pca9633_remove(struct i2c_client *client)
struct pca9633_led *pca9633 = i2c_get_clientdata(client);
int i;
- for (i = 0; i < 4; i++) {
- led_classdev_unregister(&pca9633[i].led_cdev);
- cancel_work_sync(&pca9633[i].work);
- }
+ for (i = 0; i < pca9633->chipdef->n_leds; i++)
+ if (pca9633[i].client != NULL) {
+ led_classdev_unregister(&pca9633[i].led_cdev);
+ cancel_work_sync(&pca9633[i].work);
+ }
return 0;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 2/5] leds-pca9633: Unique naming of the LEDs
2013-08-14 21:23 [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 1/5] leds-pca9633: Add support for PCA9634 Ricardo Ribalda Delgado
@ 2013-08-14 21:23 ` Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 3/5] leds-pca9633: Add mutex to the ledout register Ricardo Ribalda Delgado
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2013-08-14 21:23 UTC (permalink / raw)
To: Bryan Wu, Peter Meerwald, Richard Purdie, Linux LED Subsystem, LKML
Cc: Ricardo Ribalda Delgado
If there is more than one pca963x chips on the system and there are
some LEDs without platform_data names, the driver wont be able to
provide unique naming to them.
This will cause led_class_dev_register to fail, unregistering all the
LEDs of the chip.
This patch adds the i2c address to the name of the unnamed LEDs, making
them unique.
[ 555.346827] ------------[ cut here ]------------
[ 555.346844] WARNING: at /build/linux-voe0Su/linux-3.9.8/fs/sysfs/dir.c:536 sysfs_add_one+0x8b/0x9d()
[ 555.346847] Hardware name: QT5022
[ 555.346850] sysfs: cannot create duplicate filename '/class/leds/pca9633:6'
[ 555.346853] Modules linked in: qt5038_platform(O+) leds_pca9633(O) hid_generic ledtrig_default_on rfcomm bnep bluetooth binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc nls_utf8 nls_cp437 vfat fat loop fuse joydev hid_multitouch usbhid hid acpi_cpufreq mperf kvm_amd kvm evdev pn533 nfc arc4 microcode pcspkr efivars k10temp ath9k ath9k_common ath9k_hw ath fglrx(PO) mac80211 cfg80211 video rfkill processor thermal_sys sp5100_tco button i2c_piix4 ext4 crc16 jbd2 mbcache sg sd_mod crc_t10dif ahci libahci igb i2c_algo_bit i2c_core dca ptp pps_core ehci_pci ohci_hcd ehci_hcd libata usbcore usb_common scsi_mod [last unloaded: leds_pca963x]
[ 555.346940] Pid: 4766, comm: insmod Tainted: P W O 3.9-1-amd64 #1 Debian 3.9.8-1
[ 555.346943] Call Trace:
[ 555.346956] [<ffffffff8103d153>] ? warn_slowpath_common+0x76/0x8c
[ 555.346962] [<ffffffff8103d202>] ? warn_slowpath_fmt+0x47/0x49
[ 555.346968] [<ffffffff8116005d>] ? sysfs_pathname+0x3b/0x41
[ 555.346973] [<ffffffff81160767>] ? sysfs_add_one+0x8b/0x9d
[ 555.346978] [<ffffffff811610a4>] ? sysfs_do_create_link_sd+0xe8/0x174
[ 555.346985] [<ffffffff81279250>] ? device_add+0x243/0x5ab
[ 555.346991] [<ffffffff81060a16>] ? complete_all+0x31/0x40
[ 555.346998] [<ffffffff8104991a>] ? init_timer_key+0xc/0x56
[ 555.347004] [<ffffffff8127964c>] ? device_create_vargs+0x82/0xb6
[ 555.347009] [<ffffffff812796af>] ? device_create+0x2f/0x31
[ 555.347014] [<ffffffff81060add>] ? should_resched+0x5/0x23
[ 555.347021] [<ffffffff812a3a92>] ? led_classdev_register+0x24/0x103
[ 555.347028] [<ffffffffa09d01c0>] ? pca9633_probe+0x173/0x239 [leds_pca9633]
[ 555.347035] [<ffffffff8127b504>] ? __driver_attach+0x73/0x73
[ 555.347049] [<ffffffffa009dfc9>] ? i2c_device_probe+0x63/0x88 [i2c_core]
[ 555.347057] [<ffffffff8127b373>] ? driver_probe_device+0x92/0x1b0
[ 555.347064] [<ffffffff81279c5c>] ? bus_for_each_drv+0x43/0x7d
[ 555.347070] [<ffffffff8127b2af>] ? device_attach+0x68/0x83
[ 555.347078] [<ffffffff8127a990>] ? bus_probe_device+0x25/0x8d
[ 555.347083] [<ffffffff812793f7>] ? device_add+0x3ea/0x5ab
[ 555.347088] [<ffffffff81060a16>] ? complete_all+0x31/0x40
[ 555.347094] [<ffffffff8104991a>] ? init_timer_key+0xc/0x56
[ 555.347104] [<ffffffffa009d3a1>] ? i2c_new_device+0x10d/0x179 [i2c_core]
[ 555.347112] [<ffffffffa008f036>] ? qt5038_init+0x36/0x1000 [qt5038_platform]
[ 555.347119] [<ffffffffa008f000>] ? 0xffffffffa008efff
[ 555.347125] [<ffffffff8100209e>] ? do_one_initcall+0x74/0x128
[ 555.347131] [<ffffffffa008f000>] ? 0xffffffffa008efff
[ 555.347137] [<ffffffff810836f5>] ? load_module+0x1af7/0x1dfc
[ 555.347144] [<ffffffff810801c5>] ? free_notes_attrs+0x3c/0x3c
[ 555.347150] [<ffffffff81083a98>] ? sys_init_module+0x9e/0xab
[ 555.347157] [<ffffffff8138be29>] ? system_call_fastpath+0x16/0x1b
[ 555.347161] ---[ end trace ad00b85794e0de4d ]---
[ 555.347448] leds-pca9633: probe of 0-006b failed with error -17
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
drivers/leds/leds-pca9633.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c
index e59ca0a..7dd48f8 100644
--- a/drivers/leds/leds-pca9633.c
+++ b/drivers/leds/leds-pca9633.c
@@ -362,10 +362,12 @@ static int pca9633_probe(struct i2c_client *client,
if (pdata->leds.leds[i].default_trigger)
pca9633[i].led_cdev.default_trigger =
pdata->leds.leds[i].default_trigger;
- } else {
- snprintf(pca9633[i].name, sizeof(pca9633[i].name),
- "pca9633:%d", i);
}
+ if (!pdata || i >= pdata->leds.num_leds ||
+ !pdata->leds.leds[i].name)
+ snprintf(pca9633[i].name, sizeof(pca9633[i].name),
+ "pca9633:%d:%.2x:%d", client->adapter->nr,
+ client->addr, i);
pca9633[i].led_cdev.name = pca9633[i].name;
pca9633[i].led_cdev.brightness_set = pca9633_led_set;
--
1.7.10.4
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 3/5] leds-pca9633: Add mutex to the ledout register
2013-08-14 21:23 [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 1/5] leds-pca9633: Add support for PCA9634 Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 2/5] leds-pca9633: Unique naming of the LEDs Ricardo Ribalda Delgado
@ 2013-08-14 21:23 ` Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 4/5] leds-pca9633: Rename to leds-pca963x Ricardo Ribalda Delgado
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2013-08-14 21:23 UTC (permalink / raw)
To: Bryan Wu, Peter Meerwald, Richard Purdie, Linux LED Subsystem, LKML
Cc: Ricardo Ribalda Delgado
To update an LED a register has to be read, updated and writen. If
another LED whas been updated at the same time, this could lead into
wrong updates.
This patch adds a common mutex to all the leds of the same chip to
protect the ledout register.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
drivers/leds/leds-pca9633.c | 86 +++++++++++++++++++++++++++----------------
1 file changed, 55 insertions(+), 31 deletions(-)
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c
index 7dd48f8..aaa1c4a 100644
--- a/drivers/leds/leds-pca9633.c
+++ b/drivers/leds/leds-pca9633.c
@@ -93,9 +93,17 @@ enum pca9633_cmd {
BLINK_SET,
};
-struct pca9633_led {
- struct i2c_client *client;
+struct pca9633_led;
+
+struct pca9633 {
struct pca9633_chipdef *chipdef;
+ struct mutex mutex;
+ struct i2c_client *client;
+ struct pca9633_led *leds;
+};
+
+struct pca9633_led {
+ struct pca9633 *chip;
struct work_struct work;
enum led_brightness brightness;
struct led_classdev led_cdev;
@@ -108,52 +116,60 @@ struct pca9633_led {
static void pca9633_brightness_work(struct pca9633_led *pca9633)
{
- u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4);
+ u8 ledout_addr = pca9633->chip->chipdef->ledout_base
+ + (pca9633->led_num / 4);
u8 ledout;
int shift = 2 * (pca9633->led_num % 4);
u8 mask = 0x3 << shift;
- ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr);
+ mutex_lock(&pca9633->chip->mutex);
+ ledout = i2c_smbus_read_byte_data(pca9633->chip->client, ledout_addr);
switch (pca9633->brightness) {
case LED_FULL:
- i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
+ i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
(ledout & ~mask) | (PCA9633_LED_ON << shift));
break;
case LED_OFF:
- i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
+ i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
ledout & ~mask);
break;
default:
- i2c_smbus_write_byte_data(pca9633->client,
+ i2c_smbus_write_byte_data(pca9633->chip->client,
PCA9633_PWM_BASE + pca9633->led_num,
pca9633->brightness);
- i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
+ i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
(ledout & ~mask) | (PCA9633_LED_PWM << shift));
break;
}
+ mutex_unlock(&pca9633->chip->mutex);
}
static void pca9633_blink_work(struct pca9633_led *pca9633)
{
- u8 ledout_addr = pca9633->chipdef->ledout_base + (pca9633->led_num / 4);
- u8 ledout = i2c_smbus_read_byte_data(pca9633->client, ledout_addr);
- u8 mode2 = i2c_smbus_read_byte_data(pca9633->client, PCA9633_MODE2);
+ u8 ledout_addr = pca9633->chip->chipdef->ledout_base +
+ (pca9633->led_num / 4);
+ u8 ledout;
+ u8 mode2 = i2c_smbus_read_byte_data(pca9633->chip->client,
+ PCA9633_MODE2);
int shift = 2 * (pca9633->led_num % 4);
u8 mask = 0x3 << shift;
- i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grppwm,
- pca9633->gdc);
+ i2c_smbus_write_byte_data(pca9633->chip->client,
+ pca9633->chip->chipdef->grppwm, pca9633->gdc);
- i2c_smbus_write_byte_data(pca9633->client, pca9633->chipdef->grpfreq,
- pca9633->gfrq);
+ i2c_smbus_write_byte_data(pca9633->chip->client,
+ pca9633->chip->chipdef->grpfreq, pca9633->gfrq);
if (!(mode2 & PCA9633_MODE2_DMBLNK))
- i2c_smbus_write_byte_data(pca9633->client, PCA9633_MODE2,
+ i2c_smbus_write_byte_data(pca9633->chip->client, PCA9633_MODE2,
mode2 | PCA9633_MODE2_DMBLNK);
+ mutex_lock(&pca9633->chip->mutex);
+ ledout = i2c_smbus_read_byte_data(pca9633->chip->client, ledout_addr);
if ((ledout & mask) != (PCA9633_LED_GRP_PWM << shift))
- i2c_smbus_write_byte_data(pca9633->client, ledout_addr,
+ i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
(ledout & ~mask) | (PCA9633_LED_GRP_PWM << shift));
+ mutex_unlock(&pca9633->chip->mutex);
}
static void pca9633_work(struct work_struct *work)
@@ -318,6 +334,7 @@ pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
static int pca9633_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ struct pca9633 *pca9633_chip;
struct pca9633_led *pca9633;
struct pca9633_platform_data *pdata;
struct pca9633_chipdef *chip;
@@ -341,17 +358,30 @@ static int pca9633_probe(struct i2c_client *client,
return -EINVAL;
}
+ pca9633_chip = devm_kzalloc(&client->dev, sizeof(*pca9633_chip),
+ GFP_KERNEL);
+ if (!pca9633_chip)
+ return -ENOMEM;
pca9633 = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca9633),
GFP_KERNEL);
if (!pca9633)
return -ENOMEM;
- i2c_set_clientdata(client, pca9633);
+ i2c_set_clientdata(client, pca9633_chip);
+
+ mutex_init(&pca9633_chip->mutex);
+ pca9633_chip->chipdef = chip;
+ pca9633_chip->client = client;
+ pca9633_chip->leds = pca9633;
+
+ /* Turn off LEDs by default*/
+ i2c_smbus_write_byte_data(client, chip->ledout_base, 0x00);
+ if (chip->n_leds > 4)
+ i2c_smbus_write_byte_data(client, chip->ledout_base + 1, 0x00);
for (i = 0; i < chip->n_leds; i++) {
- pca9633[i].client = client;
pca9633[i].led_num = i;
- pca9633[i].chipdef = chip;
+ pca9633[i].chip = pca9633_chip;
/* Platform data can specify LED names and default triggers */
if (pdata && i < pdata->leds.num_leds) {
@@ -389,11 +419,6 @@ static int pca9633_probe(struct i2c_client *client,
if (pdata && pdata->outdrv == PCA9633_OPEN_DRAIN)
i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01);
- /* Turn off LEDs */
- i2c_smbus_write_byte_data(client, chip->ledout_base, 0x00);
- if (chip->n_leds > 4)
- i2c_smbus_write_byte_data(client, chip->ledout_base + 1, 0x00);
-
return 0;
exit:
@@ -407,14 +432,13 @@ exit:
static int pca9633_remove(struct i2c_client *client)
{
- struct pca9633_led *pca9633 = i2c_get_clientdata(client);
+ struct pca9633 *pca9633 = i2c_get_clientdata(client);
int i;
- for (i = 0; i < pca9633->chipdef->n_leds; i++)
- if (pca9633[i].client != NULL) {
- led_classdev_unregister(&pca9633[i].led_cdev);
- cancel_work_sync(&pca9633[i].work);
- }
+ for (i = 0; i < pca9633->chipdef->n_leds; i++) {
+ led_classdev_unregister(&pca9633->leds[i].led_cdev);
+ cancel_work_sync(&pca9633->leds[i].work);
+ }
return 0;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 4/5] leds-pca9633: Rename to leds-pca963x
2013-08-14 21:23 [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Ricardo Ribalda Delgado
` (2 preceding siblings ...)
2013-08-14 21:23 ` [PATCH v5 3/5] leds-pca9633: Add mutex to the ledout register Ricardo Ribalda Delgado
@ 2013-08-14 21:23 ` Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 5/5] leds-pca963x: Fix device tree parsing Ricardo Ribalda Delgado
2013-08-17 0:17 ` [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Bryan Wu
5 siblings, 0 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2013-08-14 21:23 UTC (permalink / raw)
To: Bryan Wu, Peter Meerwald, Richard Purdie, Linux LED Subsystem, LKML
Cc: Ricardo Ribalda Delgado
The driver now supports the chips pca9633 and pca9634, therefore we
rename the files to more generic and meaningul names
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
Documentation/devicetree/bindings/leds/pca9633.txt | 47 --
Documentation/devicetree/bindings/leds/pca963x.txt | 47 ++
drivers/leds/Kconfig | 2 +-
drivers/leds/Makefile | 2 +-
drivers/leds/leds-pca9633.c | 461 --------------------
drivers/leds/leds-pca963x.c | 461 ++++++++++++++++++++
include/linux/platform_data/leds-pca9633.h | 41 --
include/linux/platform_data/leds-pca963x.h | 42 ++
8 files changed, 552 insertions(+), 551 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/leds/pca9633.txt
create mode 100644 Documentation/devicetree/bindings/leds/pca963x.txt
delete mode 100644 drivers/leds/leds-pca9633.c
create mode 100644 drivers/leds/leds-pca963x.c
delete mode 100644 include/linux/platform_data/leds-pca9633.h
create mode 100644 include/linux/platform_data/leds-pca963x.h
diff --git a/Documentation/devicetree/bindings/leds/pca9633.txt b/Documentation/devicetree/bindings/leds/pca9633.txt
deleted file mode 100644
index aece3ea..0000000
--- a/Documentation/devicetree/bindings/leds/pca9633.txt
+++ /dev/null
@@ -1,47 +0,0 @@
-LEDs connected to pca9632, pca9633 or pca9634
-
-Required properties:
-- compatible : should be : "nxp,pca9632", "nxp,pca9633" or "nxp,pca9634"
-
-Optional properties:
-- nxp,totem-pole : use totem pole (push-pull) instead of default open-drain
-- nxp,hw-blink : use hardware blinking instead of software blinking
-
-Each led is represented as a sub-node of the nxp,pca963x device.
-
-LED sub-node properties:
-- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
-- reg : number of LED line (could be from 0 to 3 in pca9632 or pca9633
- or 0 to 7 in pca9634)
-- linux,default-trigger : (optional)
- see Documentation/devicetree/bindings/leds/common.txt
-
-Examples:
-
-pca9632: pca9632 {
- compatible = "nxp,pca9632";
- #address-cells = <1>;
- #size-cells = <0>;
- reg = <0x62>;
-
- red@0 {
- label = "red";
- reg = <0>;
- linux,default-trigger = "none";
- };
- green@1 {
- label = "green";
- reg = <1>;
- linux,default-trigger = "none";
- };
- blue@2 {
- label = "blue";
- reg = <2>;
- linux,default-trigger = "none";
- };
- unused@3 {
- label = "unused";
- reg = <3>;
- linux,default-trigger = "none";
- };
-};
diff --git a/Documentation/devicetree/bindings/leds/pca963x.txt b/Documentation/devicetree/bindings/leds/pca963x.txt
new file mode 100644
index 0000000..aece3ea
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/pca963x.txt
@@ -0,0 +1,47 @@
+LEDs connected to pca9632, pca9633 or pca9634
+
+Required properties:
+- compatible : should be : "nxp,pca9632", "nxp,pca9633" or "nxp,pca9634"
+
+Optional properties:
+- nxp,totem-pole : use totem pole (push-pull) instead of default open-drain
+- nxp,hw-blink : use hardware blinking instead of software blinking
+
+Each led is represented as a sub-node of the nxp,pca963x device.
+
+LED sub-node properties:
+- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
+- reg : number of LED line (could be from 0 to 3 in pca9632 or pca9633
+ or 0 to 7 in pca9634)
+- linux,default-trigger : (optional)
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Examples:
+
+pca9632: pca9632 {
+ compatible = "nxp,pca9632";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x62>;
+
+ red@0 {
+ label = "red";
+ reg = <0>;
+ linux,default-trigger = "none";
+ };
+ green@1 {
+ label = "green";
+ reg = <1>;
+ linux,default-trigger = "none";
+ };
+ blue@2 {
+ label = "blue";
+ reg = <2>;
+ linux,default-trigger = "none";
+ };
+ unused@3 {
+ label = "unused";
+ reg = <3>;
+ linux,default-trigger = "none";
+ };
+};
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index e7977aa..a1a52be 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -291,7 +291,7 @@ config LEDS_PCA955X
LED driver chips accessed via the I2C bus. Supported
devices include PCA9550, PCA9551, PCA9552, and PCA9553.
-config LEDS_PCA9633
+config LEDS_PCA963X
tristate "LED support for PCA963x I2C chip"
depends on LEDS_CLASS
depends on I2C
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 3013113..c7e3542 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -35,7 +35,7 @@ obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
obj-$(CONFIG_LEDS_OT200) += leds-ot200.o
obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
obj-$(CONFIG_LEDS_PCA955X) += leds-pca955x.o
-obj-$(CONFIG_LEDS_PCA9633) += leds-pca9633.o
+obj-$(CONFIG_LEDS_PCA963X) += leds-pca963x.o
obj-$(CONFIG_LEDS_DA903X) += leds-da903x.o
obj-$(CONFIG_LEDS_DA9052) += leds-da9052.o
obj-$(CONFIG_LEDS_WM831X_STATUS) += leds-wm831x-status.o
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c
deleted file mode 100644
index aaa1c4a..0000000
--- a/drivers/leds/leds-pca9633.c
+++ /dev/null
@@ -1,461 +0,0 @@
-/*
- * Copyright 2011 bct electronic GmbH
- * Copyright 2013 Qtechnology/AS
- *
- * Author: Peter Meerwald <p.meerwald@bct-electronic.com>
- * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
- *
- * Based on leds-pca955x.c
- *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License. See the file COPYING in the main
- * directory of this archive for more details.
- *
- * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
- * LED driver for the PCA9634 I2C LED driver (7-bit slave address set by hw.)
- *
- * Note that hardware blinking violates the leds infrastructure driver
- * interface since the hardware only supports blinking all LEDs with the
- * same delay_on/delay_off rates. That is, only the LEDs that are set to
- * blink will actually blink but all LEDs that are set to blink will blink
- * in identical fashion. The delay_on/delay_off values of the last LED
- * that is set to blink will be used for all of the blinking LEDs.
- * Hardware blinking is disabled by default but can be enabled by setting
- * the 'blink_type' member in the platform_data struct to 'PCA9633_HW_BLINK'
- * or by adding the 'nxp,hw-blink' property to the DTS.
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/string.h>
-#include <linux/ctype.h>
-#include <linux/leds.h>
-#include <linux/err.h>
-#include <linux/i2c.h>
-#include <linux/workqueue.h>
-#include <linux/slab.h>
-#include <linux/of.h>
-#include <linux/platform_data/leds-pca9633.h>
-
-/* LED select registers determine the source that drives LED outputs */
-#define PCA9633_LED_OFF 0x0 /* LED driver off */
-#define PCA9633_LED_ON 0x1 /* LED driver on */
-#define PCA9633_LED_PWM 0x2 /* Controlled through PWM */
-#define PCA9633_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */
-
-#define PCA9633_MODE2_DMBLNK 0x20 /* Enable blinking */
-
-#define PCA9633_MODE1 0x00
-#define PCA9633_MODE2 0x01
-#define PCA9633_PWM_BASE 0x02
-
-enum pca9633_type {
- pca9633,
- pca9634,
-};
-
-struct pca9633_chipdef {
- u8 grppwm;
- u8 grpfreq;
- u8 ledout_base;
- int n_leds;
-};
-
-static struct pca9633_chipdef pca9633_chipdefs[] = {
- [pca9633] = {
- .grppwm = 0x6,
- .grpfreq = 0x7,
- .ledout_base = 0x8,
- .n_leds = 4,
- },
- [pca9634] = {
- .grppwm = 0xa,
- .grpfreq = 0xb,
- .ledout_base = 0xc,
- .n_leds = 8,
- },
-};
-
-/* Total blink period in milliseconds */
-#define PCA9632_BLINK_PERIOD_MIN 42
-#define PCA9632_BLINK_PERIOD_MAX 10667
-
-static const struct i2c_device_id pca9633_id[] = {
- { "pca9632", pca9633 },
- { "pca9633", pca9633 },
- { "pca9634", pca9634 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, pca9633_id);
-
-enum pca9633_cmd {
- BRIGHTNESS_SET,
- BLINK_SET,
-};
-
-struct pca9633_led;
-
-struct pca9633 {
- struct pca9633_chipdef *chipdef;
- struct mutex mutex;
- struct i2c_client *client;
- struct pca9633_led *leds;
-};
-
-struct pca9633_led {
- struct pca9633 *chip;
- struct work_struct work;
- enum led_brightness brightness;
- struct led_classdev led_cdev;
- int led_num; /* 0 .. 7 potentially */
- enum pca9633_cmd cmd;
- char name[32];
- u8 gdc;
- u8 gfrq;
-};
-
-static void pca9633_brightness_work(struct pca9633_led *pca9633)
-{
- u8 ledout_addr = pca9633->chip->chipdef->ledout_base
- + (pca9633->led_num / 4);
- u8 ledout;
- int shift = 2 * (pca9633->led_num % 4);
- u8 mask = 0x3 << shift;
-
- mutex_lock(&pca9633->chip->mutex);
- ledout = i2c_smbus_read_byte_data(pca9633->chip->client, ledout_addr);
- switch (pca9633->brightness) {
- case LED_FULL:
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA9633_LED_ON << shift));
- break;
- case LED_OFF:
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- ledout & ~mask);
- break;
- default:
- i2c_smbus_write_byte_data(pca9633->chip->client,
- PCA9633_PWM_BASE + pca9633->led_num,
- pca9633->brightness);
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA9633_LED_PWM << shift));
- break;
- }
- mutex_unlock(&pca9633->chip->mutex);
-}
-
-static void pca9633_blink_work(struct pca9633_led *pca9633)
-{
- u8 ledout_addr = pca9633->chip->chipdef->ledout_base +
- (pca9633->led_num / 4);
- u8 ledout;
- u8 mode2 = i2c_smbus_read_byte_data(pca9633->chip->client,
- PCA9633_MODE2);
- int shift = 2 * (pca9633->led_num % 4);
- u8 mask = 0x3 << shift;
-
- i2c_smbus_write_byte_data(pca9633->chip->client,
- pca9633->chip->chipdef->grppwm, pca9633->gdc);
-
- i2c_smbus_write_byte_data(pca9633->chip->client,
- pca9633->chip->chipdef->grpfreq, pca9633->gfrq);
-
- if (!(mode2 & PCA9633_MODE2_DMBLNK))
- i2c_smbus_write_byte_data(pca9633->chip->client, PCA9633_MODE2,
- mode2 | PCA9633_MODE2_DMBLNK);
-
- mutex_lock(&pca9633->chip->mutex);
- ledout = i2c_smbus_read_byte_data(pca9633->chip->client, ledout_addr);
- if ((ledout & mask) != (PCA9633_LED_GRP_PWM << shift))
- i2c_smbus_write_byte_data(pca9633->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA9633_LED_GRP_PWM << shift));
- mutex_unlock(&pca9633->chip->mutex);
-}
-
-static void pca9633_work(struct work_struct *work)
-{
- struct pca9633_led *pca9633 = container_of(work,
- struct pca9633_led, work);
-
- switch (pca9633->cmd) {
- case BRIGHTNESS_SET:
- pca9633_brightness_work(pca9633);
- break;
- case BLINK_SET:
- pca9633_blink_work(pca9633);
- break;
- }
-}
-
-static void pca9633_led_set(struct led_classdev *led_cdev,
- enum led_brightness value)
-{
- struct pca9633_led *pca9633;
-
- pca9633 = container_of(led_cdev, struct pca9633_led, led_cdev);
-
- pca9633->cmd = BRIGHTNESS_SET;
- pca9633->brightness = value;
-
- /*
- * Must use workqueue for the actual I/O since I2C operations
- * can sleep.
- */
- schedule_work(&pca9633->work);
-}
-
-static int pca9633_blink_set(struct led_classdev *led_cdev,
- unsigned long *delay_on, unsigned long *delay_off)
-{
- struct pca9633_led *pca9633;
- unsigned long time_on, time_off, period;
- u8 gdc, gfrq;
-
- pca9633 = container_of(led_cdev, struct pca9633_led, led_cdev);
-
- time_on = *delay_on;
- time_off = *delay_off;
-
- /* If both zero, pick reasonable defaults of 500ms each */
- if (!time_on && !time_off) {
- time_on = 500;
- time_off = 500;
- }
-
- period = time_on + time_off;
-
- /* If period not supported by hardware, default to someting sane. */
- if ((period < PCA9632_BLINK_PERIOD_MIN) ||
- (period > PCA9632_BLINK_PERIOD_MAX)) {
- time_on = 500;
- time_off = 500;
- period = time_on + time_off;
- }
-
- /*
- * From manual: duty cycle = (GDC / 256) ->
- * (time_on / period) = (GDC / 256) ->
- * GDC = ((time_on * 256) / period)
- */
- gdc = (time_on * 256) / period;
-
- /*
- * From manual: period = ((GFRQ + 1) / 24) in seconds.
- * So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->
- * GFRQ = ((period * 24 / 1000) - 1)
- */
- gfrq = (period * 24 / 1000) - 1;
-
- pca9633->cmd = BLINK_SET;
- pca9633->gdc = gdc;
- pca9633->gfrq = gfrq;
-
- /*
- * Must use workqueue for the actual I/O since I2C operations
- * can sleep.
- */
- schedule_work(&pca9633->work);
-
- *delay_on = time_on;
- *delay_off = time_off;
-
- return 0;
-}
-
-#if IS_ENABLED(CONFIG_OF)
-static struct pca9633_platform_data *
-pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
-{
- struct device_node *np = client->dev.of_node, *child;
- struct pca9633_platform_data *pdata;
- struct led_info *pca9633_leds;
- int count;
-
- count = of_get_child_count(np);
- if (!count || count > chip->n_leds)
- return ERR_PTR(-ENODEV);
-
- pca9633_leds = devm_kzalloc(&client->dev,
- sizeof(struct led_info) * chip->n_leds, GFP_KERNEL);
- if (!pca9633_leds)
- return ERR_PTR(-ENOMEM);
-
- for_each_child_of_node(np, child) {
- struct led_info led;
- u32 reg;
- int res;
-
- led.name =
- of_get_property(child, "label", NULL) ? : child->name;
- led.default_trigger =
- of_get_property(child, "linux,default-trigger", NULL);
- res = of_property_read_u32(child, "reg", ®);
- if (res != 0)
- continue;
- pca9633_leds[reg] = led;
- }
- pdata = devm_kzalloc(&client->dev,
- sizeof(struct pca9633_platform_data), GFP_KERNEL);
- if (!pdata)
- return ERR_PTR(-ENOMEM);
-
- pdata->leds.leds = pca9633_leds;
- pdata->leds.num_leds = count;
-
- /* default to open-drain unless totem pole (push-pull) is specified */
- if (of_property_read_bool(np, "nxp,totem-pole"))
- pdata->outdrv = PCA9633_TOTEM_POLE;
- else
- pdata->outdrv = PCA9633_OPEN_DRAIN;
-
- /* default to software blinking unless hardware blinking is specified */
- if (of_property_read_bool(np, "nxp,hw-blink"))
- pdata->blink_type = PCA9633_HW_BLINK;
- else
- pdata->blink_type = PCA9633_SW_BLINK;
-
- return pdata;
-}
-
-static const struct of_device_id of_pca9633_match[] = {
- { .compatible = "nxp,pca9632", },
- { .compatible = "nxp,pca9633", },
- { .compatible = "nxp,pca9634", },
- {},
-};
-#else
-static struct pca9633_platform_data *
-pca9633_dt_init(struct i2c_client *client, struct pca9633_chipdef *chip)
-{
- return ERR_PTR(-ENODEV);
-}
-#endif
-
-static int pca9633_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct pca9633 *pca9633_chip;
- struct pca9633_led *pca9633;
- struct pca9633_platform_data *pdata;
- struct pca9633_chipdef *chip;
- int i, err;
-
- chip = &pca9633_chipdefs[id->driver_data];
- pdata = dev_get_platdata(&client->dev);
-
- if (!pdata) {
- pdata = pca9633_dt_init(client, chip);
- if (IS_ERR(pdata)) {
- dev_warn(&client->dev, "could not parse configuration\n");
- pdata = NULL;
- }
- }
-
- if (pdata && (pdata->leds.num_leds < 1 ||
- pdata->leds.num_leds > chip->n_leds)) {
- dev_err(&client->dev, "board info must claim 1-%d LEDs",
- chip->n_leds);
- return -EINVAL;
- }
-
- pca9633_chip = devm_kzalloc(&client->dev, sizeof(*pca9633_chip),
- GFP_KERNEL);
- if (!pca9633_chip)
- return -ENOMEM;
- pca9633 = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca9633),
- GFP_KERNEL);
- if (!pca9633)
- return -ENOMEM;
-
- i2c_set_clientdata(client, pca9633_chip);
-
- mutex_init(&pca9633_chip->mutex);
- pca9633_chip->chipdef = chip;
- pca9633_chip->client = client;
- pca9633_chip->leds = pca9633;
-
- /* Turn off LEDs by default*/
- i2c_smbus_write_byte_data(client, chip->ledout_base, 0x00);
- if (chip->n_leds > 4)
- i2c_smbus_write_byte_data(client, chip->ledout_base + 1, 0x00);
-
- for (i = 0; i < chip->n_leds; i++) {
- pca9633[i].led_num = i;
- pca9633[i].chip = pca9633_chip;
-
- /* Platform data can specify LED names and default triggers */
- if (pdata && i < pdata->leds.num_leds) {
- if (pdata->leds.leds[i].name)
- snprintf(pca9633[i].name,
- sizeof(pca9633[i].name), "pca9633:%s",
- pdata->leds.leds[i].name);
- if (pdata->leds.leds[i].default_trigger)
- pca9633[i].led_cdev.default_trigger =
- pdata->leds.leds[i].default_trigger;
- }
- if (!pdata || i >= pdata->leds.num_leds ||
- !pdata->leds.leds[i].name)
- snprintf(pca9633[i].name, sizeof(pca9633[i].name),
- "pca9633:%d:%.2x:%d", client->adapter->nr,
- client->addr, i);
-
- pca9633[i].led_cdev.name = pca9633[i].name;
- pca9633[i].led_cdev.brightness_set = pca9633_led_set;
-
- if (pdata && pdata->blink_type == PCA9633_HW_BLINK)
- pca9633[i].led_cdev.blink_set = pca9633_blink_set;
-
- INIT_WORK(&pca9633[i].work, pca9633_work);
-
- err = led_classdev_register(&client->dev, &pca9633[i].led_cdev);
- if (err < 0)
- goto exit;
- }
-
- /* Disable LED all-call address and set normal mode */
- i2c_smbus_write_byte_data(client, PCA9633_MODE1, 0x00);
-
- /* Configure output: open-drain or totem pole (push-pull) */
- if (pdata && pdata->outdrv == PCA9633_OPEN_DRAIN)
- i2c_smbus_write_byte_data(client, PCA9633_MODE2, 0x01);
-
- return 0;
-
-exit:
- while (i--) {
- led_classdev_unregister(&pca9633[i].led_cdev);
- cancel_work_sync(&pca9633[i].work);
- }
-
- return err;
-}
-
-static int pca9633_remove(struct i2c_client *client)
-{
- struct pca9633 *pca9633 = i2c_get_clientdata(client);
- int i;
-
- for (i = 0; i < pca9633->chipdef->n_leds; i++) {
- led_classdev_unregister(&pca9633->leds[i].led_cdev);
- cancel_work_sync(&pca9633->leds[i].work);
- }
-
- return 0;
-}
-
-static struct i2c_driver pca9633_driver = {
- .driver = {
- .name = "leds-pca9633",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(of_pca9633_match),
- },
- .probe = pca9633_probe,
- .remove = pca9633_remove,
- .id_table = pca9633_id,
-};
-
-module_i2c_driver(pca9633_driver);
-
-MODULE_AUTHOR("Peter Meerwald <p.meerwald@bct-electronic.com>");
-MODULE_DESCRIPTION("PCA9633 LED driver");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
new file mode 100644
index 0000000..35d56a6
--- /dev/null
+++ b/drivers/leds/leds-pca963x.c
@@ -0,0 +1,461 @@
+/*
+ * Copyright 2011 bct electronic GmbH
+ * Copyright 2013 Qtechnology/AS
+ *
+ * Author: Peter Meerwald <p.meerwald@bct-electronic.com>
+ * Author: Ricardo Ribalda <ricardo.ribalda@gmail.com>
+ *
+ * Based on leds-pca955x.c
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62)
+ * LED driver for the PCA9634 I2C LED driver (7-bit slave address set by hw.)
+ *
+ * Note that hardware blinking violates the leds infrastructure driver
+ * interface since the hardware only supports blinking all LEDs with the
+ * same delay_on/delay_off rates. That is, only the LEDs that are set to
+ * blink will actually blink but all LEDs that are set to blink will blink
+ * in identical fashion. The delay_on/delay_off values of the last LED
+ * that is set to blink will be used for all of the blinking LEDs.
+ * Hardware blinking is disabled by default but can be enabled by setting
+ * the 'blink_type' member in the platform_data struct to 'PCA963X_HW_BLINK'
+ * or by adding the 'nxp,hw-blink' property to the DTS.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/platform_data/leds-pca963x.h>
+
+/* LED select registers determine the source that drives LED outputs */
+#define PCA963X_LED_OFF 0x0 /* LED driver off */
+#define PCA963X_LED_ON 0x1 /* LED driver on */
+#define PCA963X_LED_PWM 0x2 /* Controlled through PWM */
+#define PCA963X_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */
+
+#define PCA963X_MODE2_DMBLNK 0x20 /* Enable blinking */
+
+#define PCA963X_MODE1 0x00
+#define PCA963X_MODE2 0x01
+#define PCA963X_PWM_BASE 0x02
+
+enum pca963x_type {
+ pca9633,
+ pca9634,
+};
+
+struct pca963x_chipdef {
+ u8 grppwm;
+ u8 grpfreq;
+ u8 ledout_base;
+ int n_leds;
+};
+
+static struct pca963x_chipdef pca963x_chipdefs[] = {
+ [pca9633] = {
+ .grppwm = 0x6,
+ .grpfreq = 0x7,
+ .ledout_base = 0x8,
+ .n_leds = 4,
+ },
+ [pca9634] = {
+ .grppwm = 0xa,
+ .grpfreq = 0xb,
+ .ledout_base = 0xc,
+ .n_leds = 8,
+ },
+};
+
+/* Total blink period in milliseconds */
+#define PCA963X_BLINK_PERIOD_MIN 42
+#define PCA963X_BLINK_PERIOD_MAX 10667
+
+static const struct i2c_device_id pca963x_id[] = {
+ { "pca9632", pca9633 },
+ { "pca9633", pca9633 },
+ { "pca9634", pca9634 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, pca963x_id);
+
+enum pca963x_cmd {
+ BRIGHTNESS_SET,
+ BLINK_SET,
+};
+
+struct pca963x_led;
+
+struct pca963x {
+ struct pca963x_chipdef *chipdef;
+ struct mutex mutex;
+ struct i2c_client *client;
+ struct pca963x_led *leds;
+};
+
+struct pca963x_led {
+ struct pca963x *chip;
+ struct work_struct work;
+ enum led_brightness brightness;
+ struct led_classdev led_cdev;
+ int led_num; /* 0 .. 7 potentially */
+ enum pca963x_cmd cmd;
+ char name[32];
+ u8 gdc;
+ u8 gfrq;
+};
+
+static void pca963x_brightness_work(struct pca963x_led *pca963x)
+{
+ u8 ledout_addr = pca963x->chip->chipdef->ledout_base
+ + (pca963x->led_num / 4);
+ u8 ledout;
+ int shift = 2 * (pca963x->led_num % 4);
+ u8 mask = 0x3 << shift;
+
+ mutex_lock(&pca963x->chip->mutex);
+ ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
+ switch (pca963x->brightness) {
+ case LED_FULL:
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ (ledout & ~mask) | (PCA963X_LED_ON << shift));
+ break;
+ case LED_OFF:
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ ledout & ~mask);
+ break;
+ default:
+ i2c_smbus_write_byte_data(pca963x->chip->client,
+ PCA963X_PWM_BASE + pca963x->led_num,
+ pca963x->brightness);
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ (ledout & ~mask) | (PCA963X_LED_PWM << shift));
+ break;
+ }
+ mutex_unlock(&pca963x->chip->mutex);
+}
+
+static void pca963x_blink_work(struct pca963x_led *pca963x)
+{
+ u8 ledout_addr = pca963x->chip->chipdef->ledout_base +
+ (pca963x->led_num / 4);
+ u8 ledout;
+ u8 mode2 = i2c_smbus_read_byte_data(pca963x->chip->client,
+ PCA963X_MODE2);
+ int shift = 2 * (pca963x->led_num % 4);
+ u8 mask = 0x3 << shift;
+
+ i2c_smbus_write_byte_data(pca963x->chip->client,
+ pca963x->chip->chipdef->grppwm, pca963x->gdc);
+
+ i2c_smbus_write_byte_data(pca963x->chip->client,
+ pca963x->chip->chipdef->grpfreq, pca963x->gfrq);
+
+ if (!(mode2 & PCA963X_MODE2_DMBLNK))
+ i2c_smbus_write_byte_data(pca963x->chip->client, PCA963X_MODE2,
+ mode2 | PCA963X_MODE2_DMBLNK);
+
+ mutex_lock(&pca963x->chip->mutex);
+ ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
+ if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift))
+ i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
+ (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift));
+ mutex_unlock(&pca963x->chip->mutex);
+}
+
+static void pca963x_work(struct work_struct *work)
+{
+ struct pca963x_led *pca963x = container_of(work,
+ struct pca963x_led, work);
+
+ switch (pca963x->cmd) {
+ case BRIGHTNESS_SET:
+ pca963x_brightness_work(pca963x);
+ break;
+ case BLINK_SET:
+ pca963x_blink_work(pca963x);
+ break;
+ }
+}
+
+static void pca963x_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct pca963x_led *pca963x;
+
+ pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);
+
+ pca963x->cmd = BRIGHTNESS_SET;
+ pca963x->brightness = value;
+
+ /*
+ * Must use workqueue for the actual I/O since I2C operations
+ * can sleep.
+ */
+ schedule_work(&pca963x->work);
+}
+
+static int pca963x_blink_set(struct led_classdev *led_cdev,
+ unsigned long *delay_on, unsigned long *delay_off)
+{
+ struct pca963x_led *pca963x;
+ unsigned long time_on, time_off, period;
+ u8 gdc, gfrq;
+
+ pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);
+
+ time_on = *delay_on;
+ time_off = *delay_off;
+
+ /* If both zero, pick reasonable defaults of 500ms each */
+ if (!time_on && !time_off) {
+ time_on = 500;
+ time_off = 500;
+ }
+
+ period = time_on + time_off;
+
+ /* If period not supported by hardware, default to someting sane. */
+ if ((period < PCA963X_BLINK_PERIOD_MIN) ||
+ (period > PCA963X_BLINK_PERIOD_MAX)) {
+ time_on = 500;
+ time_off = 500;
+ period = time_on + time_off;
+ }
+
+ /*
+ * From manual: duty cycle = (GDC / 256) ->
+ * (time_on / period) = (GDC / 256) ->
+ * GDC = ((time_on * 256) / period)
+ */
+ gdc = (time_on * 256) / period;
+
+ /*
+ * From manual: period = ((GFRQ + 1) / 24) in seconds.
+ * So, period (in ms) = (((GFRQ + 1) / 24) * 1000) ->
+ * GFRQ = ((period * 24 / 1000) - 1)
+ */
+ gfrq = (period * 24 / 1000) - 1;
+
+ pca963x->cmd = BLINK_SET;
+ pca963x->gdc = gdc;
+ pca963x->gfrq = gfrq;
+
+ /*
+ * Must use workqueue for the actual I/O since I2C operations
+ * can sleep.
+ */
+ schedule_work(&pca963x->work);
+
+ *delay_on = time_on;
+ *delay_off = time_off;
+
+ return 0;
+}
+
+#if IS_ENABLED(CONFIG_OF)
+static struct pca963x_platform_data *
+pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
+{
+ struct device_node *np = client->dev.of_node, *child;
+ struct pca963x_platform_data *pdata;
+ struct led_info *pca963x_leds;
+ int count;
+
+ count = of_get_child_count(np);
+ if (!count || count > chip->n_leds)
+ return ERR_PTR(-ENODEV);
+
+ pca963x_leds = devm_kzalloc(&client->dev,
+ sizeof(struct led_info) * chip->n_leds, GFP_KERNEL);
+ if (!pca963x_leds)
+ return ERR_PTR(-ENOMEM);
+
+ for_each_child_of_node(np, child) {
+ struct led_info led;
+ u32 reg;
+ int res;
+
+ led.name =
+ of_get_property(child, "label", NULL) ? : child->name;
+ led.default_trigger =
+ of_get_property(child, "linux,default-trigger", NULL);
+ res = of_property_read_u32(child, "reg", ®);
+ if (res != 0)
+ continue;
+ pca963x_leds[reg] = led;
+ }
+ pdata = devm_kzalloc(&client->dev,
+ sizeof(struct pca963x_platform_data), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->leds.leds = pca963x_leds;
+ pdata->leds.num_leds = count;
+
+ /* default to open-drain unless totem pole (push-pull) is specified */
+ if (of_property_read_bool(np, "nxp,totem-pole"))
+ pdata->outdrv = PCA963X_TOTEM_POLE;
+ else
+ pdata->outdrv = PCA963X_OPEN_DRAIN;
+
+ /* default to software blinking unless hardware blinking is specified */
+ if (of_property_read_bool(np, "nxp,hw-blink"))
+ pdata->blink_type = PCA963X_HW_BLINK;
+ else
+ pdata->blink_type = PCA963X_SW_BLINK;
+
+ return pdata;
+}
+
+static const struct of_device_id of_pca963x_match[] = {
+ { .compatible = "nxp,pca9632", },
+ { .compatible = "nxp,pca9633", },
+ { .compatible = "nxp,pca9634", },
+ {},
+};
+#else
+static struct pca963x_platform_data *
+pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
+static int pca963x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pca963x *pca963x_chip;
+ struct pca963x_led *pca963x;
+ struct pca963x_platform_data *pdata;
+ struct pca963x_chipdef *chip;
+ int i, err;
+
+ chip = &pca963x_chipdefs[id->driver_data];
+ pdata = dev_get_platdata(&client->dev);
+
+ if (!pdata) {
+ pdata = pca963x_dt_init(client, chip);
+ if (IS_ERR(pdata)) {
+ dev_warn(&client->dev, "could not parse configuration\n");
+ pdata = NULL;
+ }
+ }
+
+ if (pdata && (pdata->leds.num_leds < 1 ||
+ pdata->leds.num_leds > chip->n_leds)) {
+ dev_err(&client->dev, "board info must claim 1-%d LEDs",
+ chip->n_leds);
+ return -EINVAL;
+ }
+
+ pca963x_chip = devm_kzalloc(&client->dev, sizeof(*pca963x_chip),
+ GFP_KERNEL);
+ if (!pca963x_chip)
+ return -ENOMEM;
+ pca963x = devm_kzalloc(&client->dev, chip->n_leds * sizeof(*pca963x),
+ GFP_KERNEL);
+ if (!pca963x)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, pca963x_chip);
+
+ mutex_init(&pca963x_chip->mutex);
+ pca963x_chip->chipdef = chip;
+ pca963x_chip->client = client;
+ pca963x_chip->leds = pca963x;
+
+ /* Turn off LEDs by default*/
+ i2c_smbus_write_byte_data(client, chip->ledout_base, 0x00);
+ if (chip->n_leds > 4)
+ i2c_smbus_write_byte_data(client, chip->ledout_base + 1, 0x00);
+
+ for (i = 0; i < chip->n_leds; i++) {
+ pca963x[i].led_num = i;
+ pca963x[i].chip = pca963x_chip;
+
+ /* Platform data can specify LED names and default triggers */
+ if (pdata && i < pdata->leds.num_leds) {
+ if (pdata->leds.leds[i].name)
+ snprintf(pca963x[i].name,
+ sizeof(pca963x[i].name), "pca963x:%s",
+ pdata->leds.leds[i].name);
+ if (pdata->leds.leds[i].default_trigger)
+ pca963x[i].led_cdev.default_trigger =
+ pdata->leds.leds[i].default_trigger;
+ }
+ if (!pdata || i >= pdata->leds.num_leds ||
+ !pdata->leds.leds[i].name)
+ snprintf(pca963x[i].name, sizeof(pca963x[i].name),
+ "pca963x:%d:%.2x:%d", client->adapter->nr,
+ client->addr, i);
+
+ pca963x[i].led_cdev.name = pca963x[i].name;
+ pca963x[i].led_cdev.brightness_set = pca963x_led_set;
+
+ if (pdata && pdata->blink_type == PCA963X_HW_BLINK)
+ pca963x[i].led_cdev.blink_set = pca963x_blink_set;
+
+ INIT_WORK(&pca963x[i].work, pca963x_work);
+
+ err = led_classdev_register(&client->dev, &pca963x[i].led_cdev);
+ if (err < 0)
+ goto exit;
+ }
+
+ /* Disable LED all-call address and set normal mode */
+ i2c_smbus_write_byte_data(client, PCA963X_MODE1, 0x00);
+
+ /* Configure output: open-drain or totem pole (push-pull) */
+ if (pdata && pdata->outdrv == PCA963X_OPEN_DRAIN)
+ i2c_smbus_write_byte_data(client, PCA963X_MODE2, 0x01);
+
+ return 0;
+
+exit:
+ while (i--) {
+ led_classdev_unregister(&pca963x[i].led_cdev);
+ cancel_work_sync(&pca963x[i].work);
+ }
+
+ return err;
+}
+
+static int pca963x_remove(struct i2c_client *client)
+{
+ struct pca963x *pca963x = i2c_get_clientdata(client);
+ int i;
+
+ for (i = 0; i < pca963x->chipdef->n_leds; i++) {
+ led_classdev_unregister(&pca963x->leds[i].led_cdev);
+ cancel_work_sync(&pca963x->leds[i].work);
+ }
+
+ return 0;
+}
+
+static struct i2c_driver pca963x_driver = {
+ .driver = {
+ .name = "leds-pca963x",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(of_pca963x_match),
+ },
+ .probe = pca963x_probe,
+ .remove = pca963x_remove,
+ .id_table = pca963x_id,
+};
+
+module_i2c_driver(pca963x_driver);
+
+MODULE_AUTHOR("Peter Meerwald <p.meerwald@bct-electronic.com>");
+MODULE_DESCRIPTION("PCA963X LED driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/platform_data/leds-pca9633.h b/include/linux/platform_data/leds-pca9633.h
deleted file mode 100644
index 3c1037a..0000000
--- a/include/linux/platform_data/leds-pca9633.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * PCA9633 LED chip driver.
- *
- * Copyright 2012 bct electronic GmbH
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-
-#ifndef __LINUX_PCA9633_H
-#define __LINUX_PCA9633_H
-#include <linux/leds.h>
-
-enum pca9633_outdrv {
- PCA9633_OPEN_DRAIN,
- PCA9633_TOTEM_POLE, /* aka push-pull */
-};
-
-enum pca9633_blink_type {
- PCA9633_SW_BLINK,
- PCA9633_HW_BLINK,
-};
-
-struct pca9633_platform_data {
- struct led_platform_data leds;
- enum pca9633_outdrv outdrv;
- enum pca9633_blink_type blink_type;
-};
-
-#endif /* __LINUX_PCA9633_H*/
diff --git a/include/linux/platform_data/leds-pca963x.h b/include/linux/platform_data/leds-pca963x.h
new file mode 100644
index 0000000..e731f00
--- /dev/null
+++ b/include/linux/platform_data/leds-pca963x.h
@@ -0,0 +1,42 @@
+/*
+ * PCA963X LED chip driver.
+ *
+ * Copyright 2012 bct electronic GmbH
+ * Copyright 2013 Qtechnology A/S
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef __LINUX_PCA963X_H
+#define __LINUX_PCA963X_H
+#include <linux/leds.h>
+
+enum pca963x_outdrv {
+ PCA963X_OPEN_DRAIN,
+ PCA963X_TOTEM_POLE, /* aka push-pull */
+};
+
+enum pca963x_blink_type {
+ PCA963X_SW_BLINK,
+ PCA963X_HW_BLINK,
+};
+
+struct pca963x_platform_data {
+ struct led_platform_data leds;
+ enum pca963x_outdrv outdrv;
+ enum pca963x_blink_type blink_type;
+};
+
+#endif /* __LINUX_PCA963X_H*/
--
1.7.10.4
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH v5 5/5] leds-pca963x: Fix device tree parsing
2013-08-14 21:23 [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Ricardo Ribalda Delgado
` (3 preceding siblings ...)
2013-08-14 21:23 ` [PATCH v5 4/5] leds-pca9633: Rename to leds-pca963x Ricardo Ribalda Delgado
@ 2013-08-14 21:23 ` Ricardo Ribalda Delgado
2013-08-17 0:17 ` [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Bryan Wu
5 siblings, 0 replies; 7+ messages in thread
From: Ricardo Ribalda Delgado @ 2013-08-14 21:23 UTC (permalink / raw)
To: Bryan Wu, Peter Meerwald, Richard Purdie, Linux LED Subsystem, LKML
Cc: Ricardo Ribalda Delgado
A malformed device tree could lead into a segmentation fault if the reg
value of a led is bigger than the number of leds.
A valid device tree could have only information about the last led of the
chip. Fix the device tree parsing to handle those cases.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
---
drivers/leds/leds-pca963x.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
index 35d56a6..82589c0 100644
--- a/drivers/leds/leds-pca963x.c
+++ b/drivers/leds/leds-pca963x.c
@@ -285,13 +285,13 @@ pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
u32 reg;
int res;
+ res = of_property_read_u32(child, "reg", ®);
+ if ((res != 0) || (reg >= chip->n_leds))
+ continue;
led.name =
of_get_property(child, "label", NULL) ? : child->name;
led.default_trigger =
of_get_property(child, "linux,default-trigger", NULL);
- res = of_property_read_u32(child, "reg", ®);
- if (res != 0)
- continue;
pca963x_leds[reg] = led;
}
pdata = devm_kzalloc(&client->dev,
@@ -300,7 +300,7 @@ pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
return ERR_PTR(-ENOMEM);
pdata->leds.leds = pca963x_leds;
- pdata->leds.num_leds = count;
+ pdata->leds.num_leds = chip->n_leds;
/* default to open-drain unless totem pole (push-pull) is specified */
if (of_property_read_bool(np, "nxp,totem-pole"))
--
1.7.10.4
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems
2013-08-14 21:23 [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Ricardo Ribalda Delgado
` (4 preceding siblings ...)
2013-08-14 21:23 ` [PATCH v5 5/5] leds-pca963x: Fix device tree parsing Ricardo Ribalda Delgado
@ 2013-08-17 0:17 ` Bryan Wu
5 siblings, 0 replies; 7+ messages in thread
From: Bryan Wu @ 2013-08-17 0:17 UTC (permalink / raw)
To: Ricardo Ribalda Delgado
Cc: Peter Meerwald, Richard Purdie, Linux LED Subsystem, LKML
On Wed, Aug 14, 2013 at 2:23 PM, Ricardo Ribalda Delgado
<ricardo.ribalda@gmail.com> wrote:
> Add Support for the PCA9634 chip. Simimart to the 9633, but with 8 outputs instead of 4.
> Fix bug when 2 chips where present on the system, the ledclass will fail and the chip wont probe.
> Protect ledout register with a mutex to support updates of more than leds at the same time
> Fix device tree parsing
>
> v5: Contains feedback from Bryan Wu
> Bryan: Fix device tree bindings documentation
>
Thanks, I've already merged this new patchset into my tree.
-Bryan
> v4: Rebase to latest leds-next and new patch to Fix the dt parsing
>
> v3: Contains feedback from Bryan Wu
> Bryan: Rename pca9633 to pca963x
>
> v2: Contains feedback from Peter Meerwald
> Peter: Fix typo on commit message. Add bus number to name
>
> Ricardo Ribalda Delgado (5):
> leds-pca9633: Add support for PCA9634
> leds-pca9633: Unique naming of the LEDs
> leds-pca9633: Add mutex to the ledout register
> leds-pca9633: Rename to leds-pca963x
> leds-pca963x: Fix device tree parsing
>
> Documentation/devicetree/bindings/leds/pca9633.txt | 46 --
> Documentation/devicetree/bindings/leds/pca963x.txt | 47 ++
> drivers/leds/Kconfig | 9 +-
> drivers/leds/Makefile | 2 +-
> drivers/leds/leds-pca9633.c | 393 -----------------
> drivers/leds/leds-pca963x.c | 461 ++++++++++++++++++++
> include/linux/platform_data/leds-pca9633.h | 41 --
> include/linux/platform_data/leds-pca963x.h | 42 ++
> 8 files changed, 556 insertions(+), 485 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/leds/pca9633.txt
> create mode 100644 Documentation/devicetree/bindings/leds/pca963x.txt
> delete mode 100644 drivers/leds/leds-pca9633.c
> create mode 100644 drivers/leds/leds-pca963x.c
> delete mode 100644 include/linux/platform_data/leds-pca9633.h
> create mode 100644 include/linux/platform_data/leds-pca963x.h
>
> --
> 1.7.10.4
>
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2013-08-17 0:17 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-08-14 21:23 [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 1/5] leds-pca9633: Add support for PCA9634 Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 2/5] leds-pca9633: Unique naming of the LEDs Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 3/5] leds-pca9633: Add mutex to the ledout register Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 4/5] leds-pca9633: Rename to leds-pca963x Ricardo Ribalda Delgado
2013-08-14 21:23 ` [PATCH v5 5/5] leds-pca963x: Fix device tree parsing Ricardo Ribalda Delgado
2013-08-17 0:17 ` [PATCH v4 0/5] PCA9633: Add support to PCA9634 and fix some problems Bryan Wu
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