@@ -33,7 +33,12 @@ static void __iomem *pmsu_mp_base;
#define PMSU_BASE_OFFSET 0x100
#define PMSU_REG_SIZE 0x1000
-#define PMSU_BOOT_ADDR_REDIRECT_OFFSET(cpu) ((cpu * 0x100) + 0x124)
+/* PMSU MP registers */
+#define PMSU_BOOT_ADDR_REDIRECT_OFFSET(cpu) ((cpu * 0x100) + 0x124)
+
+/* PMSU fabric registers */
+#define L2C_NFABRIC_PM_CTL 0x4
+#define L2C_NFABRIC_PM_CTL_PWR_DOWN BIT(20)
static struct of_device_id of_pmsu_table[] = {
{ .compatible = "marvell,armada-370-pmsu", },
@@ -115,4 +120,17 @@ static int __init armada_370_xp_pmsu_init(void)
return ret;
}
+static void armada_370_xp_pmsu_enable_l2_powerdown_onidle(void)
+{
+ u32 reg;
+
+ if (pmsu_mp_base == NULL)
+ return;
+
+ /* Enable L2 & Fabric powerdown in Deep-Idle mode - Fabric */
+ reg = readl(pmsu_mp_base + L2C_NFABRIC_PM_CTL);
+ reg |= L2C_NFABRIC_PM_CTL_PWR_DOWN;
+ writel(reg, pmsu_mp_base + L2C_NFABRIC_PM_CTL);
+}
+
early_initcall(armada_370_xp_pmsu_init);
This commit adds a function which adjusts the PMSU configuration to automatically power down the L2 and coherency fabric when we enter a certain idle state. This feature is part of the Power Management Service Unit of the Armada 370 and Armada XP SoCs. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> --- arch/arm/mach-mvebu/pmsu.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)