[PATCH] clk: spacemit: k3: add 2.0 GHz PLL3 and PLL4 rates

[Aurelien Jarno <aurelien@aurel32.net>]

Starting with version k3-br-v1.0.7, the vendor U-Boot configures the C0
and C1 CPU clock domains (X100 cores) to 2.0 GHz instead of 2.2 GHz.
PLL3 feeds C0 and PLL4 feeds C1, but their rate tables currently contain
only the 2.2 GHz overclocking operating point. This causes the linux
kernel to hang at boot.

Add the 2.0 GHz configuration in both tables to fix the issue. Tested
with both k3-br-v1.0.5 (X100 running at 2.2 GHz) and k3-br-v1.0.7 (X100
cores running at 2.0 GHz).

Cc: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Cc: stable@kernel.org
Fixes: e371a77255b8 ("clk: spacemit: k3: add the clock tree")
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 drivers/clk/spacemit/ccu-k3.c | 2 ++
 1 file changed, 2 insertions(+)

The related U-Boot change is available at:
https://github.com/spacemit-com/uboot-2022.10/commit/274f664150dade144df265baf7dc8e15dd9cce52

diff --git a/drivers/clk/spacemit/ccu-k3.c b/drivers/clk/spacemit/ccu-k3.c
index d676a692bccb4..40a2dab1a2a71 100644
--- a/drivers/clk/spacemit/ccu-k3.c
+++ b/drivers/clk/spacemit/ccu-k3.c
@@ -30,10 +30,12 @@ static const struct ccu_pll_rate_tbl pll2_rate_tbl[] = {
 };
 
 static const struct ccu_pll_rate_tbl pll3_rate_tbl[] = {
+	CCU_PLLA_RATE(2000000000UL, 0x0b292aaa, 0x0000ab00, 0xa0558686),
 	CCU_PLLA_RATE(2200000000UL, 0x0b2d3555, 0x00005500, 0xa0558787),
 };
 
 static const struct ccu_pll_rate_tbl pll4_rate_tbl[] = {
+	CCU_PLLA_RATE(2000000000UL, 0x0b292aaa, 0x0000ab00, 0xa0558686),
 	CCU_PLLA_RATE(2200000000UL, 0x0b2d3555, 0x00005500, 0xa0558787),
 };
 
-- 
2.53.0