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Message-Id: <20240711-pca995x-v3-2-a1bf1f3c3f5a@gmail.com>
Date: Thu, 11 Jul 2024 09:52:23 +0200
From: Pieterjan Camerlynck via B4 Relay <devnull+pieterjanca.gmail.com@...nel.org>
To: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Isai Gaspar <isaiezequiel.gaspar@....com>, Marek Vasut <marex@...x.de>
Cc: linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Pieterjan Camerlynck <pieterjanca@...il.com>
Subject: [PATCH v3 2/2] leds: leds-pca995x: Add support for NXP PCA9956B
From: Pieterjan Camerlynck <pieterjanca@...il.com>
Add support for PCA9956B chip, which belongs to the same family.
This chip features 24 instead of 16 outputs, so add a chipdef struct to
deal with the different register layouts.
Signed-off-by: Pieterjan Camerlynck <pieterjanca@...il.com>
---
drivers/leds/leds-pca995x.c | 59 ++++++++++++++++++++++++++++++---------------
1 file changed, 39 insertions(+), 20 deletions(-)
diff --git a/drivers/leds/leds-pca995x.c b/drivers/leds/leds-pca995x.c
index 78215dff1499..02cead01ff95 100644
--- a/drivers/leds/leds-pca995x.c
+++ b/drivers/leds/leds-pca995x.c
@@ -19,10 +19,6 @@
#define PCA995X_MODE1 0x00
#define PCA995X_MODE2 0x01
#define PCA995X_LEDOUT0 0x02
-#define PCA9955B_PWM0 0x08
-#define PCA9952_PWM0 0x0A
-#define PCA9952_IREFALL 0x43
-#define PCA9955B_IREFALL 0x45
/* Auto-increment disabled. Normal mode */
#define PCA995X_MODE1_CFG 0x00
@@ -34,17 +30,38 @@
#define PCA995X_LDRX_MASK 0x3
#define PCA995X_LDRX_BITS 2
-#define PCA995X_MAX_OUTPUTS 16
+#define PCA995X_MAX_OUTPUTS 24
#define PCA995X_OUTPUTS_PER_REG 4
#define PCA995X_IREFALL_FULL_CFG 0xFF
#define PCA995X_IREFALL_HALF_CFG (PCA995X_IREFALL_FULL_CFG / 2)
-#define PCA995X_TYPE_NON_B 0
-#define PCA995X_TYPE_B 1
-
#define ldev_to_led(c) container_of(c, struct pca995x_led, ldev)
+struct pca995x_chipdef {
+ unsigned int num_leds;
+ u8 pwm_base;
+ u8 irefall;
+};
+
+static const struct pca995x_chipdef pca9952_chipdef = {
+ .num_leds = 16,
+ .pwm_base = 0x0a,
+ .irefall = 0x43,
+};
+
+static const struct pca995x_chipdef pca9955b_chipdef = {
+ .num_leds = 16,
+ .pwm_base = 0x08,
+ .irefall = 0x45,
+};
+
+static const struct pca995x_chipdef pca9956b_chipdef = {
+ .num_leds = 24,
+ .pwm_base = 0x0a,
+ .irefall = 0x40,
+};
+
struct pca995x_led {
unsigned int led_no;
struct led_classdev ldev;
@@ -52,9 +69,9 @@ struct pca995x_led {
};
struct pca995x_chip {
+ const struct pca995x_chipdef *chipdef;
struct regmap *regmap;
struct pca995x_led leds[PCA995X_MAX_OUTPUTS];
- int btype;
};
static int pca995x_brightness_set(struct led_classdev *led_cdev,
@@ -62,10 +79,11 @@ static int pca995x_brightness_set(struct led_classdev *led_cdev,
{
struct pca995x_led *led = ldev_to_led(led_cdev);
struct pca995x_chip *chip = led->chip;
+ const struct pca995x_chipdef *chipdef = chip->chipdef;
u8 ledout_addr, pwmout_addr;
int shift, ret;
- pwmout_addr = (chip->btype ? PCA9955B_PWM0 : PCA9952_PWM0) + led->led_no;
+ pwmout_addr = chipdef->pwm_base + led->led_no;
ledout_addr = PCA995X_LEDOUT0 + (led->led_no / PCA995X_OUTPUTS_PER_REG);
shift = PCA995X_LDRX_BITS * (led->led_no % PCA995X_OUTPUTS_PER_REG);
@@ -104,11 +122,12 @@ static int pca995x_probe(struct i2c_client *client)
struct fwnode_handle *led_fwnodes[PCA995X_MAX_OUTPUTS] = { 0 };
struct fwnode_handle *np, *child;
struct device *dev = &client->dev;
+ const struct pca995x_chipdef *chipdef;
struct pca995x_chip *chip;
struct pca995x_led *led;
- int i, btype, reg, ret;
+ int i, reg, ret;
- btype = (unsigned long)device_get_match_data(&client->dev);
+ chipdef = device_get_match_data(&client->dev);
np = dev_fwnode(dev);
if (!np)
@@ -118,7 +137,7 @@ static int pca995x_probe(struct i2c_client *client)
if (!chip)
return -ENOMEM;
- chip->btype = btype;
+ chip->chipdef = chipdef;
chip->regmap = devm_regmap_init_i2c(client, &pca995x_regmap);
if (IS_ERR(chip->regmap))
return PTR_ERR(chip->regmap);
@@ -170,21 +189,21 @@ static int pca995x_probe(struct i2c_client *client)
return ret;
/* IREF Output current value for all LEDn outputs */
- return regmap_write(chip->regmap,
- btype ? PCA9955B_IREFALL : PCA9952_IREFALL,
- PCA995X_IREFALL_HALF_CFG);
+ return regmap_write(chip->regmap, chipdef->irefall, PCA995X_IREFALL_HALF_CFG);
}
static const struct i2c_device_id pca995x_id[] = {
- { "pca9952", .driver_data = (kernel_ulong_t)PCA995X_TYPE_NON_B },
- { "pca9955b", .driver_data = (kernel_ulong_t)PCA995X_TYPE_B },
+ { "pca9952", .driver_data = (kernel_ulong_t)&pca9952_chipdef },
+ { "pca9955b", .driver_data = (kernel_ulong_t)&pca9955b_chipdef },
+ { "pca9956b", .driver_data = (kernel_ulong_t)&pca9956b_chipdef },
{}
};
MODULE_DEVICE_TABLE(i2c, pca995x_id);
static const struct of_device_id pca995x_of_match[] = {
- { .compatible = "nxp,pca9952", .data = (void *)PCA995X_TYPE_NON_B },
- { .compatible = "nxp,pca9955b", .data = (void *)PCA995X_TYPE_B },
+ { .compatible = "nxp,pca9952", .data = &pca9952_chipdef },
+ { .compatible = "nxp,pca9955b", . data = &pca9955b_chipdef },
+ { .compatible = "nxp,pca9956b", .data = &pca9956b_chipdef },
{},
};
MODULE_DEVICE_TABLE(of, pca995x_of_match);
--
2.45.2
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