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Date: Tue, 13 Nov 2012 10:35:13 +0100
From: Peter Ujfalusi <peter.ujfalusi@...com>
To: Grant Likely <grant.likely@...retlab.ca>,
Linus Walleij <linus.walleij@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>
Subject: [PATCH] gpio: twl4030: Use only TWL4030_MODULE_LED for LED configuration
Avoid using the TWL4030_MODULE_PWMA/B as module ID. The LEDEN, PWMA ON/OFF
and PWMB ON/OFF registers are in a continuous range starting from LED base.
This is going to be helpful for further cleanup in the twl stack.
No functional changes.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
drivers/gpio/gpio-twl4030.c | 35 ++++++++++++++++++-----------------
1 file changed, 18 insertions(+), 17 deletions(-)
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index c5f8ca2..d2138b0 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -88,11 +88,15 @@ static inline int gpio_twl4030_write(u8 address, u8 data)
/*----------------------------------------------------------------------*/
/*
- * LED register offsets (use TWL4030_MODULE_{LED,PWMA,PWMB}))
+ * LED register offsets from TWL_MODULE_LED base
* PWMs A and B are dedicated to LEDs A and B, respectively.
*/
-#define TWL4030_LED_LEDEN 0x0
+#define TWL4030_LED_LEDEN_REG 0x00
+#define TWL4030_PWMAON_REG 0x01
+#define TWL4030_PWMAOFF_REG 0x02
+#define TWL4030_PWMBON_REG 0x03
+#define TWL4030_PWMBOFF_REG 0x04
/* LEDEN bits */
#define LEDEN_LEDAON BIT(0)
@@ -104,9 +108,6 @@ static inline int gpio_twl4030_write(u8 address, u8 data)
#define LEDEN_PWM_LENGTHA BIT(6)
#define LEDEN_PWM_LENGTHB BIT(7)
-#define TWL4030_PWMx_PWMxON 0x0
-#define TWL4030_PWMx_PWMxOFF 0x1
-
#define PWMxON_LENGTH BIT(7)
/*----------------------------------------------------------------------*/
@@ -145,7 +146,7 @@ static void twl4030_led_set_value(int led, int value)
else
cached_leden |= mask;
status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
- TWL4030_LED_LEDEN);
+ TWL4030_LED_LEDEN_REG);
mutex_unlock(&gpio_lock);
}
@@ -216,33 +217,33 @@ static int twl_request(struct gpio_chip *chip, unsigned offset)
if (offset >= TWL4030_GPIO_MAX) {
u8 ledclr_mask = LEDEN_LEDAON | LEDEN_LEDAEXT
| LEDEN_LEDAPWM | LEDEN_PWM_LENGTHA;
- u8 module = TWL4030_MODULE_PWMA;
+ u8 reg = TWL4030_PWMAON_REG;
offset -= TWL4030_GPIO_MAX;
if (offset) {
ledclr_mask <<= 1;
- module = TWL4030_MODULE_PWMB;
+ reg = TWL4030_PWMBON_REG;
}
/* initialize PWM to always-drive */
- status = twl_i2c_write_u8(module, 0x7f,
- TWL4030_PWMx_PWMxOFF);
+ /* Configure PWM OFF register first */
+ status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg + 1);
if (status < 0)
goto done;
- status = twl_i2c_write_u8(module, 0x7f,
- TWL4030_PWMx_PWMxON);
+
+ /* Followed by PWM ON register */
+ status = twl_i2c_write_u8(TWL4030_MODULE_LED, 0x7f, reg);
if (status < 0)
goto done;
/* init LED to not-driven (high) */
- module = TWL4030_MODULE_LED;
- status = twl_i2c_read_u8(module, &cached_leden,
- TWL4030_LED_LEDEN);
+ status = twl_i2c_read_u8(TWL4030_MODULE_LED, &cached_leden,
+ TWL4030_LED_LEDEN_REG);
if (status < 0)
goto done;
cached_leden &= ~ledclr_mask;
- status = twl_i2c_write_u8(module, cached_leden,
- TWL4030_LED_LEDEN);
+ status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
+ TWL4030_LED_LEDEN_REG);
if (status < 0)
goto done;
--
1.8.0
--
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