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is32flcommon: Allow custom PWM frequency config

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Signed-off-by: Daniel Schaefer <dhs@frame.work>
This commit is contained in:
Daniel Schaefer 2023-10-30 09:25:46 +08:00
parent f30e12adcf
commit af4f40ddf6
2 changed files with 24 additions and 0 deletions
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4
drivers/led/issi/is31fl3743.h
View File

@ -114,6 +114,10 @@
#define ISSI_PWM_REG_1ST 0x01
#define ISSI_SCL_REG_1ST 0x01
#define ISSI_REG_TEST 0xE0
#define ISSI_REG_CUSTOM_PWM 0xE2
#define ISSI_CUSTOM_PWM_32K 0xE0
// Map CS SW locations to order in PWM / Scaling buffers
// This matches the ORDER in the Datasheet Register not the POSITION
// It will always count from 0x00 to (ISSI_MAX_LEDS - 1)

20
drivers/led/issi/is31flcommon.c
View File

@ -89,6 +89,21 @@ void IS31FL_unlock_register(uint8_t addr, uint8_t page) {
IS31FL_write_single_register(addr, ISSI_COMMANDREGISTER, page);
}
// Only known to work on IS31FL3743
void IS31FL_common_set_pwm_frequency(uint8_t addr, uint8_t freq) {
// Unlock the command register & select Function Register
//IS31FL_unlock_register(addr, ISSI_PAGE_FUNCTION);
// Enable test mode to unlock PWM freqency register
IS31FL_write_single_register(addr, ISSI_REG_TEST, 0x01);
IS31FL_write_single_register(addr, ISSI_REG_CUSTOM_PWM, freq);
// Disable test mode again
IS31FL_write_single_register(addr, ISSI_REG_TEST, 0x00);
}
void IS31FL_common_init(uint8_t addr, uint8_t ssr) {
// Setup phase, need to take out of software shutdown and configure
// ISSI_SSR_x is passed to allow Master / Slave setting where applicable
@ -116,6 +131,11 @@ void IS31FL_common_init(uint8_t addr, uint8_t ssr) {
IS31FL_write_single_register(addr, ISSI_REG_PWM_SET, ISSI_PWM_SET);
#endif
#ifdef ISSI_CUSTOM_PWM_FREQ
// Instead of default 29kHz increase to 32.25kHz PWM Frequency
IS31FL_common_set_pwm_frequency(addr, ISSI_CUSTOM_PWM_32K);
#endif
// Wait 10ms to ensure the device has woken up.
wait_ms(10);
}