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driver: clock_control: npcx: power down some modules by default

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This commit sets the power down bit of the module SDP, UART3, UART4,
and I3C by default. The module's driver should take the responsibility
to clear it to turn on the power. It helps reduce the power consumption
when an application doesn't use these modules.

Signed-off-by: Jun Lin <CHLin56@nuvoton.com>
This commit is contained in:
Jun Lin 2022-02-14 15:15:32 +08:00 • committed by Anas Nashif
commit 6faa8fcd8d
1 changed files with 6 additions and 1 deletions
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7
drivers/clock_control/clock_control_npcx.c
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@ -213,13 +213,18 @@ static int npcx_clock_control_init(const struct device *dev)
* Power-down (turn off clock) the modules initially for better
* power consumption.
*/
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL1) = 0xF9; /* No SDP_PD/FIU_PD */
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL1) = 0xFB; /* No SDP_PD/FIU_PD */
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL2) = 0xFF;
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL3) = 0x1F; /* No GDMA_PD */
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL4) = 0xFF;
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL5) = 0xFA;
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL6) = 0xFF;
#if defined(CONFIG_SOC_SERIES_NPCX7)
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL7) = 0xE7;
#elif defined(CONFIG_SOC_SERIES_NPCX9)
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL7) = 0xFF;
NPCX_PWDWN_CTL(pmc_base, NPCX_PWDWN_CTL8) = 0x31;
#endif
return 0;
}