sunxi: switch PRCM to non-secure on H3/H5 SoCs
The PRCM of H3/H5 SoCs have a secure/non-secure switch, which controls
the access to some clock/power related registers in PRCM.
Current Linux kernel will access the CPUS (AR100) clock in the PRCM
block, so the PRCM should be switched to non-secure.
Add code to switch the PRCM to non-secure.
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Jagan Teki <jagan@openedev.com>
diff --git a/arch/arm/mach-sunxi/clock_sun6i.c b/arch/arm/mach-sunxi/clock_sun6i.c
index ec5b026..870ff5b 100644
--- a/arch/arm/mach-sunxi/clock_sun6i.c
+++ b/arch/arm/mach-sunxi/clock_sun6i.c
@@ -66,11 +66,17 @@
#ifdef CONFIG_MACH_SUNXI_H3_H5
struct sunxi_ccm_reg * const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ struct sunxi_prcm_reg * const prcm =
+ (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
setbits_le32(&ccm->ccu_sec_switch,
CCM_SEC_SWITCH_MBUS_NONSEC |
CCM_SEC_SWITCH_BUS_NONSEC |
CCM_SEC_SWITCH_PLL_NONSEC);
+ setbits_le32(&prcm->prcm_sec_switch,
+ PRCM_SEC_SWITCH_APB0_CLK_NONSEC |
+ PRCM_SEC_SWITCH_PLL_CFG_NONSEC |
+ PRCM_SEC_SWITCH_PWR_GATE_NONSEC);
#endif
}