在 2017-07-20 14:00，Icenowy Zheng 写道：
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.
Ping.
Maxime and Jagan, can you merge this patchset?
This is necessary for R_CCU to work properly on H3.
Signed-off-by: Icenowy Zheng <[email protected]>
---
arch/arm/mach-sunxi/clock_sun6i.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/mach-sunxi/clock_sun6i.c
b/arch/arm/mach-sunxi/clock_sun6i.c
index ec5b026ef5..870ff5b1e0 100644
--- a/arch/arm/mach-sunxi/clock_sun6i.c
+++ b/arch/arm/mach-sunxi/clock_sun6i.c
@@ -66,11 +66,17 @@ void clock_init_sec(void)
#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
}
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