[PATCH v2] sunxi: spl: Fix H616 clock initialization

[Jernej Skrabec]

It turns out that there is a magic bit in PRCM region which seemingly
makes PLLs work if it's enabled. Sadly, there is no documentation what
it does exactly, so we'll just mimick BSP boot0 behaviour and enable it
before any clock is set up.

Fixes: b18bd53d6cde ("sunxi: introduce support for H616 clocks")
Signed-off-by: Jernej Skrabec <jernej.skrabec at siol.net>
---
Changes from v1:
- use if (IS_ENABLED()) instead of #ifdef #endif

 arch/arm/mach-sunxi/clock_sun50i_h6.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-sunxi/clock_sun50i_h6.c b/arch/arm/mach-sunxi/clock_sun50i_h6.c
index 06d84eb158d7..492fc4a3fca8 100644
--- a/arch/arm/mach-sunxi/clock_sun50i_h6.c
+++ b/arch/arm/mach-sunxi/clock_sun50i_h6.c
@@ -9,6 +9,11 @@ void clock_init_safe(void)
 {
 	struct sunxi_ccm_reg *const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+
+	/* this seems to enable PLLs on H616 */
+	if (IS_ENABLED(CONFIG_MACH_SUN50I_H616))
+		setbits_le32(SUNXI_PRCM_BASE + 0x250, 0x10);
+
 	clock_set_pll1(408000000);
 
 	writel(CCM_PLL6_DEFAULT, &ccm->pll6_cfg);
-- 
2.30.0