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authorTim Chen <tim-chen@quanta.corp-partner.google.com>2020-12-01 10:04:04 +0800
committerPatrick Georgi <pgeorgi@google.com>2021-01-15 11:22:13 +0000
commit77a7520385242bd2c9e323ecc74490b383c22f5e (patch)
tree60dcbfdc75203e7fc94f21d715ba5b398930c42a /src/soc
parent9d20c84460093db15445540359e5362bfc914d1a (diff)
mb/google/dedede/var/metaknight: Add LTE power on/off sequence
LTE module used in metaknight has a specific power on/off sequence. GPIOs related to power sequence are: * GPP_A10 - LTE_PWR_OFF_R_ODL * GPP_H17 - LTE_RESET_R_ODL 1. Power on: GPP_A10 -> 20ms -> GPP_H17 2. Power off: GPP_H17 -> 10ms -> GPP_A10 3. Warm reset: GPP_A10 keeps high, GPP_H17 goes low at least 2ms Configure the GPIOs based on these requirements. BUG=b:173671094 TEST=Build and boot Metaknight to OS. Ensure that the LTE module power sequence requirements are met. Change-Id: Ibff16129dfe2f1de2b1519049244aba4b3123e52 Signed-off-by: Tim Chen <tim-chen@quanta.corp-partner.google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/48195 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
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