TSX+32K Less Low Power软件配置

big白菜

TSX+32K Less Low Power软件配置

[QUESTION]
TSX+32K Less Low Power软件如何配置
[ANSWER]
对于32K Less的board，Low power要修改LDODCXO的配置，使得手机在进入deep sleep时，该power domain进入Low power模式，而不是power down模式，LDODCXO是给TCXO供电的，这个修改是 icfans
让TCXO在deepsleep时不会powerdown.
code 主要修改如下：
void init_ldo_sleep_gr(void)
{
unsigned int feature_32k_less = sprd_get32_less(); //区分32K Less和32K，用于兼容不同的board
if(!feature_32k_less) { //32K的board
ANA_REG_SET(ANA_REG_GLB_PWR_SLP_CTRL0,
… BI
T_
SLP_LDODCXO_PD_EN | // deepsleep时，LDODCXO会power down

…);
ANA_REG_SET(ANA_REG_GLB_PWR_SLP_CTRL2,
… //
BIT_SLP_LDODCXO_LP_EN | // deepsleep时， LDODCXO 不会进入 low power
…);
} else { //32Kless的board
ANA_REG_SET(ANA_REG_GLB_PWR_SLP_CTRL0,
… //
BIT_SLP_LDODCXO_PD_EN | // deepsleep时，LDODCXO不会power down
… );
ANA_REG_SET(ANA_REG_GLB_PWR_SLP_CTRL2,
…
// BIT_SLP_LDODCXO_LP_EN | // deepsleep时， LDODCXO不会进入 low power.
… );
ANA_REG_OR(ANA_REG_GLB_32KLESS_CTRL0,
BIT_SLP_XO_LOW_CUR_EN ); // 配置DCXO在deepsleep时进入low current mode
}