try to handle low power situations
Martin T. H. Sandsmark
parent
4ef80c1c15
commit
39b981fc4f
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@ -111,6 +111,9 @@ DECLARE_GLOBAL_DATA_PTR;
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#define USB_POWER_UP IMX_GPIO_NR(4, 6)
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#define BATTERY_LEVEL_LOW 5
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#define BATTERY_LEVEL_CRITICAL 2
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int dram_init(void)
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{
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@ -439,20 +442,48 @@ int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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return 0;
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}
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/*
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* The percentage calculated by the fuel gauge isn't always very correct,
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* so calculate it manually as well to be sure.
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*/
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static int get_battery_charge(void)
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{
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int ret;
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int ret, percent, charge_now, charge_full, charge_percent;
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uint8_t message[2];
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I2C_SET_BUS(I2C_PMIC);
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ret = i2c_read(BQ27441_I2C_ADDR, BQ27441_REG_PERCENT, 1, message, sizeof(message));
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if (ret) {
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printf("Failed to read charge from fuel gauge\n");
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printf("Failed to read percent charge from fuel gauge\n");
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return -1;
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}
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return get_unaligned_le16(message);
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percent = get_unaligned_le16(message);
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ret = i2c_read(BQ27441_I2C_ADDR, BQ27441_REG_CHARGE, 1, message, sizeof(message));
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if (ret) {
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printf("Failed to read percent charge from fuel gauge\n");
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return -1;
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}
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charge_now = get_unaligned_le16(message);
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ret = i2c_read(BQ27441_I2C_ADDR, BQ27441_REG_FULL_CHARGE, 1, message, sizeof(message));
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if (ret) {
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printf("Failed to read full charge from fuel gauge\n");
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return -1;
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}
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charge_full = get_unaligned_le16(message);
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charge_percent = 100 * charge_now / charge_full;
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if (percent < charge_percent) {
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return percent;
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} else {
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return charge_percent;
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}
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}
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static void battery_dump(void)
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@ -554,12 +585,28 @@ int cmd_check_battery(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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U_BOOT_CMD(checkbattery, CONFIG_SYS_MAXARGS, 1, cmd_check_battery, "Check battery status", "")
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static void wait_for_battery_charge(int minimum)
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{
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int battery_charge;
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while ((battery_charge = get_battery_charge()) < minimum) {
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if (!check_charger_status()) {
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printf("Battery low, not charging, powering off\n");
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snvs_poweroff();
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}
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printf("Battery critical, charging, current charge: %d%%, target: %d%%\n", battery_charge, minimum);
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/* Sleep for one second */
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udelay(1000000);
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}
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}
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int power_init_board(void)
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{
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struct pmic *p;
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unsigned int reg;
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u32 id;
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int ret, battery_charge;
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int ret;
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unsigned char offset, i, switch_num;
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/* Disable the circuitry that automatically
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@ -567,7 +614,7 @@ int power_init_board(void)
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SETUP_IOMUX_PADS(usb_power_up_pads);
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gpio_request(USB_POWER_UP, "usb_power_up");
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gpio_direction_output(USB_POWER_UP, 1);
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udelay(500000);
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/*udelay(500000);*/
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/* Set up charger */
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SETUP_IOMUX_PADS(charger_pads);
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@ -579,16 +626,17 @@ int power_init_board(void)
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printf("Not charging\n");
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}
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while ((battery_charge = get_battery_charge()) < 5) {
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wait_for_battery_charge(BATTERY_LEVEL_CRITICAL);
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/* Critical battery */
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/* while ((battery_charge = get_battery_charge()) < BATTERY_LEVEL_CRITICAL) {
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if (!check_charger_status()) {
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printf("Battery critical, not charging, powering off\n");
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snvs_poweroff();
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}
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printf("Battery low, charging, current charge: %d%%\n", battery_charge);
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/* Sleep for one second */
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printf("Battery critical, charging, current charge: %d%%\n", battery_charge);
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udelay(1000000);
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}
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}*/
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if (check_battery() < 0) {
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printf("Error when checking battery state, powering off\n");
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@ -733,6 +781,24 @@ int board_early_init_f(void)
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return 0;
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}
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int board_late_init(void)
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{
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wait_for_battery_charge(BATTERY_LEVEL_LOW);
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/*int battery_charge;
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while ((battery_charge = get_battery_charge()) < BATTERY_LEVEL_LOW) {
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if (!check_charger_status()) {
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printf("Battery low, not charging, powering off\n");
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snvs_poweroff();
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}
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printf("Battery low, charging, current charge: %d%%\n", battery_charge);
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udelay(1000000);
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}*/
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return 0;
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}
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static struct splash_location splash_locations[] = {
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{
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.name = "mmc_fs",
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@ -875,9 +941,11 @@ void epdc_power_on(void)
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if (!tries) {
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printf("Failed to bring up display power\n");
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}
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printf("EPDC powered up, enabling VCOM\n");
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/* Enable VCOM */
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gpio_set_value(IMX_GPIO_NR(2, 3), 1);
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printf("VCOM up\n");
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udelay(500);
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}
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