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Subject[PATCH 3/6] leds: pca963x: Add defines and remove some magic values
Date
This patch adds some more defines so that the driver can receive
a little more future work. These new defines are then used throughout the
existing code the remove some magic values.

This patch does not produce any binary changes.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
---
drivers/leds/leds-pca963x.c | 144 +++++++++++++++++++++++++++++++++++---------
1 file changed, 114 insertions(+), 30 deletions(-)

diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
index 1c30e92..e4e668d 100644
--- a/drivers/leds/leds-pca963x.c
+++ b/drivers/leds/leds-pca963x.c
@@ -25,6 +25,7 @@
* or by adding the 'nxp,hw-blink' property to the DTS.
*/

+#include <linux/bitops.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/err.h>
@@ -36,17 +37,96 @@
#include <linux/slab.h>
#include <linux/string.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
+/* The number of led drivers per chip */
+#define PCA9633_NUM_LEDS 4
+#define PCA9634_NUM_LEDS 8
+#define PCA9635_NUM_LEDS 16
+
+#define PCA963X_MODE1 0x00 /* Mode 1 register addr */
+#define PCA963X_MODE2 0x01 /* Mode 2 register addr */
+#define PCA963X_PWM0_ADDR 0x02 /* PWM0 duty cycle */
+#define PCA963X_PWM1_ADDR 0x03 /* PWM1 duty cycle */
+#define PCA963X_PWM2_ADDR 0x04 /* PWM2 duty cycle */
+#define PCA963X_PWM3_ADDR 0x05 /* PWM3 duty cycle */
+#define PCA963X_PWM4_ADDR 0x06 /* PWM4 duty cycle */
+#define PCA963X_PWM5_ADDR 0x07 /* PWM5 duty cycle */
+#define PCA963X_PWM6_ADDR 0x08 /* PWM6 duty cycle */
+#define PCA963X_PWM7_ADDR 0x09 /* PWM7 duty cycle */
+#define PCA963X_PWM8_ADDR 0x0a /* PWM8 duty cycle */
+#define PCA963X_PWM9_ADDR 0x0b /* PWM9 duty cycle */
+#define PCA963X_PWM10_ADDR 0x0c /* PWM10 duty cycle */
+#define PCA963X_PWM11_ADDR 0x0d /* PWM11 duty cycle */
+#define PCA963X_PWM12_ADDR 0x0e /* PWM12 duty cycle */
+#define PCA963X_PWM13_ADDR 0x0f /* PWM13 duty cycle */
+#define PCA963X_PWM14_ADDR 0x10 /* PWM14 duty cycle */
+#define PCA963X_PWM15_ADDR 0x11 /* PWM15 duty cycle */
+#define PCA9633_GRPPWM 0x06 /* Group PWM duty cycle ctrl for PCA9633 */
+#define PCA9634_GRPPWM 0x0a /* Group PWM duty cycle ctrl for PCA9634 */
+#define PCA9635_GRPPWM 0x12 /* Group PWM duty cycle ctrl for PCA9635 */
+#define PCA9633_GRPFREQ 0x07 /* Group frequency control for PCA9633 */
+#define PCA9634_GRPFREQ 0x0b /* Group frequency control for PCA9634 */
+#define PCA9635_GRPFREQ 0x13 /* Group frequency control for PCA9635 */
+#define PCA9633_LEDOUT0 0x08 /* Led output state 0 reg for PCA9633 */
+#define PCA9634_LEDOUT0 0x0c /* Led output state 0 reg for PCA9635 */
+#define PCA9634_LEDOUT1 0x0d /* Led output state 1 reg for PCA9634 */
+#define PCA9635_LEDOUT0 0x14 /* Led output state 0 reg for PCA9634 */
+#define PCA9635_LEDOUT1 0x15 /* Led output state 1 reg for PCA9635 */
+#define PCA9635_LEDOUT2 0x16 /* Led output state 2 reg for PCA9635 */
+#define PCA9635_LEDOUT3 0x17 /* Led output state 3 reg for PCA9635 */
+#define PCA9633_SUBADDR1 0x09 /* I2C subaddr 1 for PCA9633 */
+#define PCA9633_SUBADDR2 0x0a /* I2C subaddr 2 for PCA9633 */
+#define PCA9633_SUBADDR3 0x0b /* I2C subaddr 3 for PCA9633 */
+#define PCA9634_SUBADDR1 0x0e /* I2C subaddr 1 for PCA9634 */
+#define PCA9634_SUBADDR2 0x0f /* I2C subaddr 2 for PCA9634 */
+#define PCA9634_SUBADDR3 0x10 /* I2C subaddr 3 for PCA9634 */
+#define PCA9635_SUBADDR1 0x18 /* I2C subaddr 1 for PCA9635 */
+#define PCA9635_SUBADDR2 0x19 /* I2C subaddr 2 for PCA9635 */
+#define PCA9635_SUBADDR3 0x1a /* I2C subaddr 3 for PCA9635 */
+#define PCA9633_ALLCALLADDR 0x0c /* I2C Led all call address for PCA9633 */
+#define PCA9634_ALLCALLADDR 0x11 /* I2C Led all call address for PCA9634 */
+#define PCA9635_ALLCALLADDR 0x1b /* I2C Led all call address for PCA9635 */
+
+/* Helper mappings */
+#define PCA963X_PWM_ADDR(led) (PCA963X_PWM0_ADDR + (led))
+#define PCA9633_LEDOUT_BASE PCA9633_LEDOUT0
+#define PCA9634_LEDOUT_BASE PCA9634_LEDOUT0
+#define PCA9635_LEDOUT_BASE PCA9635_LEDOUT0
+
+/* MODE1 register */
+#define PCA963X_MODE1_ALLCALL_ON BIT(0) /* Respond to LED All Call */
+#define PCA963X_MODE1_RESPOND_SUB3 BIT(1) /* Respond to Sub address 3 */
+#define PCA963X_MODE1_RESPOND_SUB2 BIT(2) /* Respond to Sub address 2 */
+#define PCA963X_MODE1_RESPOND_SUB1 BIT(3) /* Respond to Sub address 1 */
+#define PCA963X_MODE1_SLEEP BIT(4) /* Put in low power mode */
+#define PCA963X_MODE1_AI_EN BIT(5) /* Enable Auto-increment */
+#define PCA963X_MODE1_AI_ROLL_PWM BIT(6) /* Auto-increment only PWM's */
+#define PCA963X_MODE1_AI_ROLL_GRP BIT(7) /* AI only group-controls */
+
+/* MODE2 register */
+#define PCA963X_MODE2_OUTNE_OUTDRV BIT(0) /* Outdrv determines led state */
+#define PCA963X_MODE2_OUTNE_HIZ BIT(1) /* Led-state in Hi-Z */
+#define PCA963X_MODE2_OUTDRV_TOTEM_POLE BIT(2) /* Outputs are totem-pole'd */
+#define PCA963X_MODE2_OCH_ACK BIT(3) /* Out change on ACK else STOP */
+#define PCA963X_MODE2_INVRT BIT(4) /* Output logic state inverted */
+#define PCA963X_MODE2_DMBLNK BIT(5) /* Grp-ctrl blink else dimming */
+
+/* LED driver output state */
+#define PCA963X_LEDOUT_LED_OFF 0x0 /* LED off */
+#define PCA963X_LEDOUT_LED_ON 0x1 /* LED fully-on */
+#define PCA963X_LEDOUT_LED_PWM 0x2 /* LED PWM mode */
+#define PCA963X_LEDOUT_LED_GRP_PWM 0x3 /* LED PWM + group PWM mode */
+
+#define PCA963X_LEDOUT_MASK PCA963X_LEDOUT_LED_GRP_PWM
+#define PCA963X_LEDOUT_LDR(x, led_num) \
+ (((x) & PCA963X_LEDOUT_MASK) << ((led_num % 4) << 1))
+
+/* Addressing register helpers */
+#define PCA963X_SUBADDR_SET(x) (((x) << 1) & 0xfe)
+#define PCA963X_ALLCALLADDR_SET(x) (((x) << 1) & 0xfe)
+
+/* Software reset password */
+#define PCA963X_PASSKEY1 0xa5
+#define PCA963X_PASSKEY2 0x5a

enum pca963x_type {
pca9633,
@@ -63,22 +143,22 @@ struct pca963x_chipdef {

static struct pca963x_chipdef pca963x_chipdefs[] = {
[pca9633] = {
- .grppwm = 0x6,
- .grpfreq = 0x7,
- .ledout_base = 0x8,
- .n_leds = 4,
+ .grppwm = PCA9633_GRPPWM,
+ .grpfreq = PCA9633_GRPFREQ,
+ .ledout_base = PCA9633_LEDOUT_BASE,
+ .n_leds = PCA9633_NUM_LEDS,
},
[pca9634] = {
- .grppwm = 0xa,
- .grpfreq = 0xb,
- .ledout_base = 0xc,
- .n_leds = 8,
+ .grppwm = PCA9634_GRPPWM,
+ .grpfreq = PCA9634_GRPFREQ,
+ .ledout_base = PCA9634_LEDOUT_BASE,
+ .n_leds = PCA9634_NUM_LEDS,
},
[pca9635] = {
- .grppwm = 0x12,
- .grpfreq = 0x13,
- .ledout_base = 0x14,
- .n_leds = 16,
+ .grppwm = PCA9635_GRPPWM,
+ .grpfreq = PCA9635_GRPFREQ,
+ .ledout_base = PCA9635_LEDOUT_BASE,
+ .n_leds = PCA9635_NUM_LEDS,
},
};

@@ -129,7 +209,7 @@ static int pca963x_brightness(struct pca963x_led *pca963x,
case LED_FULL:
ret = i2c_smbus_write_byte_data(pca963x->chip->client,
ledout_addr,
- (ledout & ~mask) | (PCA963X_LED_ON << shift));
+ (ledout & ~mask) | (PCA963X_LEDOUT_LED_ON << shift));
break;
case LED_OFF:
ret = i2c_smbus_write_byte_data(pca963x->chip->client,
@@ -143,7 +223,7 @@ static int pca963x_brightness(struct pca963x_led *pca963x,
goto unlock;
ret = i2c_smbus_write_byte_data(pca963x->chip->client,
ledout_addr,
- (ledout & ~mask) | (PCA963X_LED_PWM << shift));
+ (ledout & ~mask) | (PCA963X_LEDOUT_LED_PWM << shift));
break;
}
unlock:
@@ -173,9 +253,9 @@ static void pca963x_blink(struct pca963x_led *pca963x)
mode2 | PCA963X_MODE2_DMBLNK);

ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
- if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift))
+ if ((ledout & mask) != (PCA963X_LEDOUT_LED_GRP_PWM << shift))
i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift));
+ (ledout & ~mask) | (PCA963X_LEDOUT_LED_GRP_PWM << shift));
mutex_unlock(&pca963x->chip->mutex);
}

@@ -358,7 +438,8 @@ static int pca963x_probe(struct i2c_client *client,

/* Turn off LEDs by default*/
for (i = 0; i < chip->n_leds / 4; i++)
- i2c_smbus_write_byte_data(client, chip->ledout_base + i, 0x00);
+ i2c_smbus_write_byte_data(client, chip->ledout_base + i,
+ PCA963X_LEDOUT_LDR(PCA963X_LEDOUT_LED_OFF, i));

for (i = 0; i < chip->n_leds; i++) {
pca963x[i].led_num = i;
@@ -397,9 +478,12 @@ static int pca963x_probe(struct i2c_client *client,
if (pdata) {
/* Configure output: open-drain or totem pole (push-pull) */
if (pdata->outdrv == PCA963X_OPEN_DRAIN)
- i2c_smbus_write_byte_data(client, PCA963X_MODE2, 0x01);
+ i2c_smbus_write_byte_data(client, PCA963X_MODE2,
+ PCA963X_MODE2_OUTNE_OUTDRV);
else
- i2c_smbus_write_byte_data(client, PCA963X_MODE2, 0x05);
+ i2c_smbus_write_byte_data(client, PCA963X_MODE2,
+ PCA963X_MODE2_OUTNE_OUTDRV |
+ PCA963X_MODE2_OUTDRV_TOTEM_POLE);
}

return 0;
--
2.8.0.rc3
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