The pclk_vio_grf supply power for GRF IOs, if it is disabled, will
cause abnormal operation of the GRF.
The clock tree of the pclk_vio like this:
| --> pclk_vio_grf
... pclk_vio | --> pclk_mipi_dsi1
| --> pclk_mipi_dsi0
and the pclk_mipi_dsi0 and pclk_mipi_dsi1 don't have the flag
CLK_IGNORE_UNUSED, and they will be disabled by clk_disable_unused
when startup:
clk_disable_unused
--> clk_disable_unprepare
--> clk_disable
--> clk_core_disable(core->parent)
then, the pclk_vio_grf also is disabled. Therefore, we need to add
pclk_vio_grf to critical clock and avoid to disable pclk_vio and
pclk_vio_grf.
Tested-by: Yakir Yang <ykk at rock-chips.com>
Signed-off-by: Yakir Yang <ykk at rock-chips.com>
Signed-off-by: Brian Norris <briannorris at chromium.org>
Signed-off-by: Xing Zheng <zhengxing at rock-chips.com>
---
drivers/clk/rockchip/clk-rk3399.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index b6742fa..7ecb12c3 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -1485,6 +1485,7 @@ static const char *const rk3399_cru_critical_clocks[] __initconst = {
"gpll_hclk_perilp1_src",
"gpll_aclk_perilp0_src",
"gpll_aclk_perihp_src",
+ "pclk_vio_grf",
};
static const char *const rk3399_pmucru_critical_clocks[] __initconst = {
--
1.7.9.5
