From: Gabriel Fernandez gabriel.fernandez@st.com
commit 72cfd1ad1057f16fc614861b3c271597995e57ba upstream.
STM32MP1 clock IP offers lots of Kernel clocks that are shared by multiple IP's at the same time. Then boot loader applies a clock tree that allows to use all IP's at same time and with the maximum of performance. Not change parents on a change rate on kernel clocks ensures the integrity of the system.
Signed-off-by: Gabriel Fernandez gabriel.fernandez@st.com Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Mathieu Poirier mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/clk/clk-stm32mp1.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
--- a/drivers/clk/clk-stm32mp1.c +++ b/drivers/clk/clk-stm32mp1.c @@ -1286,10 +1286,11 @@ _clk_stm32_register_composite(struct dev MGATE_MP1(_id, _name, _parent, _flags, _mgate)
#define KCLK(_id, _name, _parents, _flags, _mgate, _mmux)\ - COMPOSITE(_id, _name, _parents, CLK_OPS_PARENT_ENABLE | _flags,\ - _MGATE_MP1(_mgate),\ - _MMUX(_mmux),\ - _NO_DIV) + COMPOSITE(_id, _name, _parents, CLK_OPS_PARENT_ENABLE |\ + CLK_SET_RATE_NO_REPARENT | _flags,\ + _MGATE_MP1(_mgate),\ + _MMUX(_mmux),\ + _NO_DIV)
enum { G_SAI1, @@ -1952,7 +1953,8 @@ static const struct clock_config stm32mp MGATE_MP1(GPU_K, "gpu_k", "pll2_q", 0, G_GPU), MGATE_MP1(DAC12_K, "dac12_k", "ck_lsi", 0, G_DAC12),
- COMPOSITE(ETHPTP_K, "ethptp_k", eth_src, CLK_OPS_PARENT_ENABLE, + COMPOSITE(ETHPTP_K, "ethptp_k", eth_src, CLK_OPS_PARENT_ENABLE | + CLK_SET_RATE_NO_REPARENT, _NO_GATE, _MMUX(M_ETHCK), _DIV(RCC_ETHCKSELR, 4, 4, CLK_DIVIDER_ALLOW_ZERO, NULL)),