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Message-Id: <1376464470-6845-2-git-send-email-ricardo.ribalda@gmail.com>
Date: Wed, 14 Aug 2013 09:14:22 +0200
From: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To: Bryan Wu <cooloney@...il.com>,
Peter Meerwald <p.meerwald@...-electronic.com>,
Richard Purdie <rpurdie@...ys.net>,
Linux LED Subsystem <linux-leds@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>
Cc: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Subject: [PATCH v4 1/5] leds-pca9633: Add support for PCA9634
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@...il.com>
---
drivers/leds/Kconfig | 7 +--
drivers/leds/leds-pca9633.c | 104 ++++++++++++++++++++++++++++++-------------
2 files changed, 77 insertions(+), 34 deletions(-)
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..3833c24 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@...-electronic.com>
+ * Author: Ricardo Ribalda <ricardo.ribalda@...il.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);
@@ -269,7 +302,9 @@ 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
@@ -285,8 +320,10 @@ 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) {
@@ -297,22 +334,24 @@ static int pca9633_probe(struct i2c_client *client,
}
}
- 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
--
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