void bl_gpio_init(void)
{
/* Configure PM8058 GPIO24 as a PWM driver (LPG ch0) for chain 1 of 6 LEDs */
pm8058_write_one(0x81, GPIO24_GPIO_CNTRL); /* Write, Bank0, VIN0, Mode
selection enabled */
pm8058_write_one(0x98, GPIO24_GPIO_CNTRL); /* Write, Bank1, OutOn/InOff,
CMOS, Don't Invert Output */
pm8058_write_one(0xAA, GPIO24_GPIO_CNTRL); /* Write, Bank2, GPIO no pull */
pm8058_write_one(0xB4, GPIO24_GPIO_CNTRL); /* Write, Bank3, high drv
strength */
pm8058_write_one(0xC6, GPIO24_GPIO_CNTRL); /* Write, Bank4, Src: LPG_DRV1
(Spec. Fnc 2) */
pm8058_write_one(0xD8, GPIO24_GPIO_CNTRL); /* Write, Bank5, Interrupt
polarity noninversion */
/* Configure PM8058 GPIO25 as a PWM driver (LPG ch1) for chain 2 of 5 LEDs */
pm8058_write_one(0x81, GPIO25_GPIO_CNTRL); /* Write, Bank0, VIN0, Mode
selection enabled */
pm8058_write_one(0x98, GPIO25_GPIO_CNTRL); /* Write, Bank1, OutOn/InOff,
CMOS, Don't Invert Output */
pm8058_write_one(0xAA, GPIO25_GPIO_CNTRL); /* Write, Bank2, GPIO no pull */
pm8058_write_one(0xB4, GPIO25_GPIO_CNTRL); /* Write, Bank3, high drv
strength */
pm8058_write_one(0xC6, GPIO25_GPIO_CNTRL); /* Write, Bank4, Src: LPG_DRV2
(Spec. Fnc 2) */
pm8058_write_one(0xD8, GPIO25_GPIO_CNTRL); /* Write, Bank5, Interrupt
polarity noninversion */
}
/* Backlight duty cycle init is used to configure the PMIC8058 for
* PWM output and drive those pins.
*/
static void bl_duty_cycle_init(void)
{
/* Disable backlight LPG channels before configuring them and dedicated
PMIC GPIOs */
pm8058_write_one(0x00, LPG_BANK_ENABLE);
/* Configure PM8058 GPIO24 as a PWM driver (LPG ch0) for chain 1 of 6 LEDs */
pm8058_write_one(0x81, GPIO24_GPIO_CNTRL); /* Write, Bank0, VIN0, Mode
selection enabled */
pm8058_write_one(0x98, GPIO24_GPIO_CNTRL); /* Write, Bank1, OutOn/InOff,
CMOS, Don't Invert Output */
pm8058_write_one(0xAA, GPIO24_GPIO_CNTRL); /* Write, Bank2, GPIO no pull */
pm8058_write_one(0xB4, GPIO24_GPIO_CNTRL); /* Write, Bank3, high drv
strength */
pm8058_write_one(0xC6, GPIO24_GPIO_CNTRL); /* Write, Bank4, Src: LPG_DRV1
(Spec. Fnc 2) */
pm8058_write_one(0xD8, GPIO24_GPIO_CNTRL); /* Write, Bank5, Interrupt
polarity noninversion */
/* Configure PM8058 GPIO25 as a PWM driver (LPG ch1) for chain 2 of 5 LEDs */
pm8058_write_one(0x81, GPIO25_GPIO_CNTRL); /* Write, Bank0, VIN0, Mode
selection enabled */
pm8058_write_one(0x98, GPIO25_GPIO_CNTRL); /* Write, Bank1, OutOn/InOff,
CMOS, Don't Invert Output */
pm8058_write_one(0xAA, GPIO25_GPIO_CNTRL); /* Write, Bank2, GPIO no pull */
pm8058_write_one(0xB4, GPIO25_GPIO_CNTRL); /* Write, Bank3, high drv
strength */
pm8058_write_one(0xC6, GPIO25_GPIO_CNTRL); /* Write, Bank4, Src: LPG_DRV2
(Spec. Fnc 2) */
pm8058_write_one(0xD8, GPIO25_GPIO_CNTRL); /* Write, Bank5, Interrupt
polarity noninversion */
/* Configure PM8058 LPG channel 0 as non-LUT PWM for PM8058 GPIO24 */
pm8058_write_one(0x0, LPG_BANK_SEL); /* Select LPG ch0 slice of control
regs */
pm8058_write_one(0x00, LPG_CTL_0); /* Disable PWM, PWM output, and LPG
ramp generator */
pm8058_write_one(0x40, LPG_CTL_1); /* Dont Toggle, Enable user PWM value,
no LUT high value idx */
pm8058_write_one(0x00, LPG_CTL_2); /* Dont Loop, no LUT low value index */
pm8058_write_one(0xDE, LPG_CTL_3); /* LS 8 bits of 9-bit PWM user value */
pm8058_write_one(0x7F, LPG_CTL_4); /* MSbit of 9-bit PWM user value,
19.2MHz, Dev 6, Expo M = 7 */
pm8058_write_one(0x01, LPG_CTL_5); /* PWM = 9bit, disable pause at high
value LUT index */
pm8058_write_one(0x00, LPG_CTL_6); /* Disable pause at low value LUT index
*/
pm8058_write_one(0x0C, LPG_CTL_0); /* Enable PWM and PWM output, LPG ramp
generator remains disabled */
/* Configure PM8058 LPG chan 1 as PWM for PM8058 GPIO25 */
pm8058_write_one(0x1, LPG_BANK_SEL); /* Select LPG ch1 slice of control
regs */
pm8058_write_one(0x00, LPG_CTL_0); /* Disable PWM, PWM output, and LPG
ramp generator */
pm8058_write_one(0x40, LPG_CTL_1); /* Dont Toggle, Enable user PWM value,
no LUT high value idx */
pm8058_write_one(0x00, LPG_CTL_2); /* Dont Loop, no LUT low value index */
pm8058_write_one(0x00, LPG_CTL_3); /* LS 8 bits of 9-bit PWM user value */
pm8058_write_one(0x7F, LPG_CTL_4); /* MSbit of 9-bit PWM user value,
19.2MHz, Dev 6, Expo M = 7 */
pm8058_write_one(0x01, LPG_CTL_5); /* PWM = 9bit, disable pause at high
value LUT index */
pm8058_write_one(0x00, LPG_CTL_6); /* Disable pause at low value LUT index
*/
pm8058_write_one(0x0C, LPG_CTL_0); /* Enable PWM and PWM output, LPG ramp
generator remains disabled */
/* Enable both LPG channels to enable backlight driver */
pm8058_write_one(0x03, LPG_BANK_ENABLE); /* Enable LPG ch0 (GPIO24) &
ch1 (GPIO25) */
}
