@@ -472,6 +472,38 @@ int omap2_clkdm_wakeup(struct clockdomain *clkdm)
return 0;
}
+
+/**
+ * omap2_clkdm_can_idle - check if clockdomain has any active clocks or not
+ * @clkdm: struct clockdomain *
+ *
+ * Checks if the clockdomain has any active clock or not, i.e. whether it
+ * can enter idle. Returns -EINVAL if clkdm is NULL; 0 if unable to idle;
+ * 1 if can idle.
+ */
+int omap2_clkdm_can_idle(struct clockdomain *clkdm)
+{
+ int i;
+
+ if (!clkdm)
+ return -EINVAL;
+
+ for (i = 0; i < clkdm->clk_reg_num; i++) {
+ u32 idlest, fclk;
+
+ fclk = cm_read_mod_reg(clkdm->pwrdm.ptr->prcm_offs,
+ CM_FCLKEN + 4 * i);
+ if (fclk & ~clkdm->idle_def[i].fclk_ignore)
+ return 0;
+
+ idlest = cm_read_mod_reg(clkdm->pwrdm.ptr->prcm_offs,
+ CM_IDLEST + 4 * i);
+ if (~idlest & clkdm->idle_def[i].idlest_mask)
+ return 0;
+ }
+ return 1;
+}
+
/**
* omap2_clkdm_allow_idle - enable hwsup idle transitions for clkdm
* @clkdm: struct clockdomain *
@@ -167,6 +167,12 @@ static struct clockdomain iva2_clkdm = {
.flags = CLKDM_CAN_HWSUP_SWSUP,
.clktrctrl_mask = OMAP3430_CLKTRCTRL_IVA2_MASK,
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
+ .clk_reg_num = 1,
+ .idle_def = {
+ [0] = {
+ .idlest_mask = OMAP3430_ST_IVA2,
+ },
+ },
};
static struct clockdomain gfx_3430es1_clkdm = {
@@ -183,6 +189,12 @@ static struct clockdomain sgx_clkdm = {
.flags = CLKDM_CAN_HWSUP_SWSUP,
.clktrctrl_mask = OMAP3430ES2_CLKTRCTRL_SGX_MASK,
.omap_chip = OMAP_CHIP_INIT(CHIP_GE_OMAP3430ES2),
+ .clk_reg_num = 1,
+ .idle_def = {
+ [0] = {
+ .idlest_mask = OMAP3430ES2_ST_SGX_SHIFT,
+ },
+ },
};
/*
@@ -206,6 +218,57 @@ static struct clockdomain core_l3_34xx_clkdm = {
.flags = CLKDM_CAN_HWSUP,
.clktrctrl_mask = OMAP3430_CLKTRCTRL_L3_MASK,
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
+ .clk_reg_num = 3,
+ .idle_def = {
+ [0] = {
+ /* UARTs are controlled by idle loop so ignore */
+ .fclk_ignore = OMAP3430_EN_UART2 |
+ OMAP3430_EN_UART1,
+ /*
+ * Reason for IDLEST ignores:
+ * - SDRC and OMAPCTRL controlled by HW
+ * - HSOTGUSB_IDLE bit is autoidled by HW
+ * - MAILBOX is controlled by HW
+ */
+ .idlest_mask =
+ OMAP3430ES2_ST_MMC3_MASK |
+ OMAP3430_ST_ICR_MASK |
+ OMAP3430_ST_AES2_MASK |
+ OMAP3430_ST_SHA12_MASK |
+ OMAP3430_ST_DES2_MASK |
+ OMAP3430_ST_MMC2_MASK |
+ OMAP3430_ST_MMC1_MASK |
+ OMAP3430_ST_MSPRO_MASK |
+ OMAP3430_ST_HDQ_MASK |
+ OMAP3430_ST_MCSPI4_MASK |
+ OMAP3430_ST_MCSPI3_MASK |
+ OMAP3430_ST_MCSPI2_MASK |
+ OMAP3430_ST_MCSPI1_MASK |
+ OMAP3430_ST_I2C3_MASK |
+ OMAP3430_ST_I2C2_MASK |
+ OMAP3430_ST_I2C1_MASK |
+ OMAP3430_ST_GPT11_MASK |
+ OMAP3430_ST_GPT10_MASK |
+ OMAP3430_ST_MCBSP5_MASK |
+ OMAP3430_ST_MCBSP1_MASK |
+ OMAP3430ES2_ST_SSI_IDLE_MASK |
+ OMAP3430ES2_ST_HSOTGUSB_STDBY_MASK |
+ OMAP3430_ST_D2D_MASK |
+ OMAP3430_ST_SDMA_MASK |
+ OMAP3430_ST_SSI_STDBY_MASK,
+ },
+ [1] = {
+ .idlest_mask = OMAP3430_ST_PKA_MASK |
+ OMAP3430_ST_AES1_MASK |
+ OMAP3430_ST_RNG_MASK |
+ OMAP3430_ST_SHA11_MASK |
+ OMAP3430_ST_DES1_MASK,
+ },
+ [2] = {
+ .idlest_mask = OMAP3430ES2_ST_USBTLL_MASK |
+ OMAP3430ES2_ST_CPEFUSE_MASK,
+ },
+ },
};
static struct clockdomain core_l4_34xx_clkdm = {
@@ -222,6 +285,13 @@ static struct clockdomain dss_34xx_clkdm = {
.flags = CLKDM_CAN_HWSUP_SWSUP,
.clktrctrl_mask = OMAP3430_CLKTRCTRL_DSS_MASK,
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
+ .clk_reg_num = 1,
+ .idle_def = {
+ [0] = {
+ .idlest_mask = OMAP3430ES2_ST_DSS_IDLE_MASK |
+ OMAP3430ES2_ST_DSS_STDBY_MASK,
+ },
+ },
};
static struct clockdomain cam_clkdm = {
@@ -230,6 +300,12 @@ static struct clockdomain cam_clkdm = {
.flags = CLKDM_CAN_HWSUP_SWSUP,
.clktrctrl_mask = OMAP3430_CLKTRCTRL_CAM_MASK,
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
+ .clk_reg_num = 1,
+ .idle_def = {
+ [0] = {
+ .idlest_mask = OMAP3430_ST_CAM,
+ },
+ },
};
static struct clockdomain usbhost_clkdm = {
@@ -238,6 +314,13 @@ static struct clockdomain usbhost_clkdm = {
.flags = CLKDM_CAN_HWSUP_SWSUP,
.clktrctrl_mask = OMAP3430ES2_CLKTRCTRL_USBHOST_MASK,
.omap_chip = OMAP_CHIP_INIT(CHIP_GE_OMAP3430ES2),
+ .clk_reg_num = 1,
+ .idle_def = {
+ [0] = {
+ .idlest_mask = OMAP3430ES2_ST_USBHOST_IDLE_MASK |
+ OMAP3430ES2_ST_USBHOST_STDBY_MASK,
+ },
+ },
};
static struct clockdomain per_clkdm = {
@@ -246,6 +329,29 @@ static struct clockdomain per_clkdm = {
.flags = CLKDM_CAN_HWSUP_SWSUP,
.clktrctrl_mask = OMAP3430_CLKTRCTRL_PER_MASK,
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
+ .clk_reg_num = 1,
+ .idle_def = {
+ [0] = {
+ .fclk_ignore = OMAP3430_ST_UART3_MASK,
+ /*
+ * GPIO2...6 are dropped out from this mask
+ * as they are always non-idle, UART3 is also
+ * out as it is handled by idle loop
+ * */
+ .idlest_mask = OMAP3430_ST_WDT3_MASK |
+ OMAP3430_ST_GPT9_MASK |
+ OMAP3430_ST_GPT8_MASK |
+ OMAP3430_ST_GPT7_MASK |
+ OMAP3430_ST_GPT6_MASK |
+ OMAP3430_ST_GPT5_MASK |
+ OMAP3430_ST_GPT4_MASK |
+ OMAP3430_ST_GPT3_MASK |
+ OMAP3430_ST_GPT2_MASK |
+ OMAP3430_ST_MCBSP4_MASK |
+ OMAP3430_ST_MCBSP3_MASK |
+ OMAP3430_ST_MCBSP2_MASK,
+ },
+ },
};
/*
@@ -1199,6 +1199,31 @@ int pwrdm_wait_transition(struct powerdomain *pwrdm)
return 0;
}
+/**
+ * pwrdm_can_idle - check if the powerdomain can enter idle
+ * @pwrdm: struct powerdomain * the powerdomain to check status of
+ *
+ * Checks all associated clockdomains if they can idle or not.
+ * Returns 1 if the powerdomain can idle, 0 if not.
+ */
+int pwrdm_can_idle(struct powerdomain *pwrdm)
+{
+ unsigned long flags;
+ int i;
+ int ret = 1;
+
+ read_lock_irqsave(&pwrdm_rwlock, flags);
+
+ for (i = 0; i < PWRDM_MAX_CLKDMS; i++)
+ if (pwrdm->pwrdm_clkdms[i] &&
+ !omap2_clkdm_can_idle(pwrdm->pwrdm_clkdms[i]))
+ ret = 0;
+
+ read_unlock_irqrestore(&pwrdm_rwlock, flags);
+
+ return ret;
+}
+
int pwrdm_state_switch(struct powerdomain *pwrdm)
{
return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
@@ -30,6 +30,12 @@
#define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
#define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP)
+/*
+ * Maximum number of FCLK register masks that can be associated with a
+ * clockdomain. CORE powerdomain on OMAP3 is the worst case
+ */
+#define CLKDM_MAX_CLK_REGS 3
+
/* OMAP24XX CM_CLKSTCTRL_*.AUTOSTATE_* register bit values */
#define OMAP24XX_CLKSTCTRL_DISABLE_AUTO 0x0
#define OMAP24XX_CLKSTCTRL_ENABLE_AUTO 0x1
@@ -61,6 +67,11 @@ struct clkdm_pwrdm_autodep {
};
+struct clkdm_idle_def {
+ u32 fclk_ignore;
+ u32 idlest_mask;
+};
+
struct clockdomain {
/* Clockdomain name */
@@ -83,6 +94,10 @@ struct clockdomain {
/* OMAP chip types that this clockdomain is valid on */
const struct omap_chip_id omap_chip;
+ /* For idle checks */
+ u8 clk_reg_num;
+ struct clkdm_idle_def idle_def[CLKDM_MAX_CLK_REGS];
+
/* Usecount tracking */
atomic_t usecount;
@@ -108,4 +123,6 @@ int omap2_clkdm_sleep(struct clockdomain *clkdm);
int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
+int omap2_clkdm_can_idle(struct clockdomain *clkdm);
+
#endif
@@ -178,6 +178,7 @@ int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
int pwrdm_wait_transition(struct powerdomain *pwrdm);
+int pwrdm_can_idle(struct powerdomain *pwrdm);
int pwrdm_state_switch(struct powerdomain *pwrdm);
int pwrdm_clkdm_state_switch(struct clockdomain *clkdm);