SPI flash odd behaviour

I have Espruino running on a DT28 smartwatch (NRF52832) with its display removed. I've soldered wires to the main board to run an e-ink display, which works fine. The watch has an 8MB SPI flash chip which I've compiled in and it works, but with power issues. My first pass I was getting nothing back with every first call (call .list() get nothing, call it again, get file list). This sounded like it needed to be woken up, so I added the flag 'DEFINES += -DSPIFLASH_SLEEP_CMD', # SPI flash needs to be explicitly slept and woken up and it that stopped the errors, but now my battery dies in about 2 days (as opposed to 10 days without flash at all). I don't have an easy way to measure the power draw other than battery life (a 200mAh which I charger for 2 hours).

BTW: SPI flash shares NO GPIOs with the display. It DOES share CLK/DATA with the accelerometer, but I do not initialize or use that at all (yet).

All thoughts appreciated. Board file is

import pinutils;

info = {
 'name' : "DT28 smartwatch",
 'boardname' : 'DT28', # visible in process.env.BOARD
 'default_console' : "EV_BLUETOOTH",
 'variables' : 2565, 
 'bootloader' : 1,
 'binary_name' : 'e_%v_dt28.hex',
 'build' : {
   'optimizeflags' : '-Os',
   'libraries' : [
     'BLUETOOTH',
     'GRAPHICS',
     'JIT',
   ],
   'makefile' : [
 'DEFINES+=-DCONFIG_GPIO_AS_PINRESET', # Allow the display MOSI pin to work
     'DEFINES += -DCONFIG_NFCT_PINS_AS_GPIOS',
     'DEFINES+=-DNRF_BLE_GATT_MAX_MTU_SIZE=53 -DNRF_BLE_MAX_MTU_SIZE=53', # increase MTU from default of 23
     'DEFINES+=-DUSE_FONT_6X8',
     'DEFINES += -DSPIFLASH_SLEEP_CMD', # SPI flash needs to be explicitly slept and woken up
     'DEFINES+=-DBLE_HIDS_ENABLED=1 -DBLUETOOTH_NAME_PREFIX=\'"DT28"\'',
     'DFU_PRIVATE_KEY=targets/nrf5x_dfu/dfu_private_key.pem',
     'NRF_BL_DFU_INSECURE=1',
     'DFU_SETTINGS=--application-version 0xff --hw-version 52 --sd-req 0x8C,0x91',
     'INCLUDE += -I$(ROOT)/libs/misc',c'
   ]
 }
};


save_code_pages = 20;
chip = {
  'part' : "NRF52832",
  'family' : "NRF52",
  'package' : "QFN48",
  'ram' : 64,
 'flash' : 512,
  'speed' : 64,
  'usart' : 1,
  'spi' : 1,
  'i2c' : 1,
  'adc' : 1,
  'dac' : 0,
  'saved_code' : {
          'page_size' : 4096,
          #'address' : ((118 - save_code_pages) * 4096), # Bootloader at 0xF8000
          #'pages' : save_code_pages,
          'flash_available' : 512 - ((35 + 8 + 2)*4), # Softdevice 5.0  uses 35 pages of flash, bootloader 8, FS 2. Each page is 4 kb.
          'address' : 0x60000000, # put this in external spiflash (see below)
          'pages' : 2048, # 8MB of the 16MB external flash
   },
};


devices = {
 'BTN1' : { 'pin' : 'D29',  'pinstate' : 'IN_PULLDOWN'},
 'BTN2' : { 'pin' : 'D30',  'pinstate' : 'IN_PULLDOWN'},
 'BTN3' : { 'pin' : 'D31'},  # Fake button: bootloader wants THREE 

  #'VIBRATE' : { 'pin' : 'D22' }, # Pin negated in software

  #'LCD' : {  # unused for bootloader

 'SPIFLASH' : {
            'pin_sck' : 'D9',
            'pin_mosi' : 'D8',
            'pin_miso' : 'D7',
            'pin_cs' : 'D6',
            'size' : 8192*1024, # 16MB
            'memmap_base' : 0x60000000 # map into the address space (in software)
  }
};

# left-right, or top-bottom order
board = {
  'left' : [ 'VDD', 'VDD', 'RESET', 'VDD','5V','GND','GND','','','D3','D4','D28','D29','D30','D31'],
  'right' : [
     'D27', 'D26', 'D2', 'GND', 'D25','D24','D23', 'D22','D20','D19','',
     'D18','D17','D16','D15','D14','D13','D12','D11','',
     'D10','D9','D8','D7','D6','D5','D21','D1','D0'],
  '_notes' : {
    'D6' : "Serial console RX",
    'D8' : "Serial console TX"
  }
};
board["_css"] = """
[#board](https://forum.espruino.com/search/?q=%23board) {
  width: 528px;
  height: 800px;
  top: 0px;
 left : 200px;
  background-image: url(img/NRF52832DK.jpg);
}
[#boardcontainer](https://forum.espruino.com/search/?q=%23boardcontainer) {
  height: 900px;
}
[#left](https://forum.espruino.com/search/?q=%23left) {
    top: 219px;
    right: 466px;
}
[#right](https://forum.espruino.com/search/?q=%23right) {
    top: 150px;
    left: 466px;
}
.leftpin { height: 17px; }
.rightpin { height: 17px; }
""";

def get_pins():
  pins = pinutils.generate_pins(0,31) # 32 General Purpose I/O Pins.
  pinutils.findpin(pins, "PD2", True)["functions"]["ADC1_IN0"]=0;
  pinutils.findpin(pins, "PD3", True)["functions"]["ADC1_IN1"]=0;
  pinutils.findpin(pins, "PD4", True)["functions"]["ADC1_IN2"]=0;
  pinutils.findpin(pins, "PD5", True)["functions"]["ADC1_IN3"]=0;
  pinutils.findpin(pins, "PD28", True)["functions"]["ADC1_IN4"]=0;
  pinutils.findpin(pins, "PD29", True)["functions"]["ADC1_IN5"]=0;
pinutils.findpin(pins, "PD30", True)["functions"]["ADC1_IN6"]=0;
  pinutils.findpin(pins, "PD31", True)["functions"]["ADC1_IN7"]=0;
  # Make buttons and LEDs negated
  pinutils.findpin(pins, "PD29", True)["functions"]["NEGATED"]=0;
  pinutils.findpin(pins, "PD30", True)["functions"]["NEGATED"]=0;

  # everything is non-5v tolerant
  for pin in pins:
    pin["functions"]["3.3"]=0;
  return pins