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boards: spresense: Reduce power consumption with LTE board

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The SPI2_CS_X and SPI2_SCK pins are used for connection to the LTE modem.
These pins are the special pins for the host interface that are set
automatically by latching the SYSTEM0/1 pins. So, it causes a problem
with increased current consumption when the modem is in power off state.
To prevent it, set these pins to GPIO HiZ during board initialization.
This commit is contained in:
SPRESENSE 2022-08-03 12:12:09 +09:00 committed by Alin Jerpelea
parent 195412fa46
commit 2b4c7290c4
1 changed files with 6 additions and 0 deletions
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6
boards/arm/cxd56xx/spresense/src/cxd56_bringup.c
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@ -248,6 +248,12 @@ int cxd56_bringup(void)
#endif
#ifndef CONFIG_CXD56_SUBCORE
/* Set the special pins for the host interface to GPIO mode because
* their mode is automatically changed by latching the SYSTEM0/1 pins.
*/
CXD56_PIN_CONFIGS(PINCONFS_SPI2A_GPIO);
/* Initialize CPU clock to max frequency */
board_clock_initialize();