Tool/software: Linux
Hi,
I'm working on implementing support for the PMIC that I use with the epdc driver on NXP i.MX7D processor. My custom board has a TI TPS65185 EPDC PMIC.
By default, the 7D implementation has a sample for max17135. I'm trying to get TPS65185 working with the patch I found on NXP community forum.
My device tree changes:
tps6518x@68 {
compatible = "ti,tps6518x";
reg = <0x68>;
status = "okay";
/*
* power sequencing for TPS65180/65181
*/
pwr_seq0 = <0xe1>; /* [Vddh-seq=3 | Vpos-seq=2 | Vee-seq=0 | Vneg-seq=1] */
pwr_seq1 = <0x30>; /* [Vneg-dly1=3 |Vee-dly0=0] mSec */
pwr_seq2 = <0x33>; /* [Vddh-dly3=3 | Vpos-dly2=3] mSec */
/*
* power sequencing for TPS65185/65186
*/
upseq0 = <0xe4>;
upseq1 = <0x55>;
dwnseq0 = <0x1e>;
dwnseq1 = <0xe0>;
gpio_pmic_pwrgood = <&gpio2 31 0>;
gpio_pmic_vcom_ctrl = <&gpio4 14 0>;
gpio_pmic_wakeup = <&gpio2 23 0>;
gpio_pmic_intr = <&gpio2 22 0>;
gpio_pmic_powerup = <&gpio2 30 0>;
regulators {
DISPLAY_reg: DISPLAY {
regulator-name = "DISPLAY";
};
VCOM_reg: VCOM {
regulator-name = "VCOM";
/* 2's-compliment, -4325000 */
regulator-min-microvolt = <0xffbe0178>;
/* 2's-compliment, -500000 */
regulator-max-microvolt = <0xfff85ee0>;
};
V3P3_reg: V3P3 {
regulator-name = "V3P3";
};
};
The driver is probing fine. But the problem I'm facing is that only the Vneg voltage is being generated.
I'm not getting the proper power-up sequence running as given on page 13 of the datasheet.
I'm not even getting a login prompt. The kernel hangs somewhere in between.
My boot logs are attached below with #####tps6518x debug logs.
Anyone have any idea on what could be the problem here, please help asap.
Thank you.log.txt.zip
