U-Boot cmd "cpu detail" shows wrong values, as the current cpu driver is
fetching cpu_freq by reading the dt node property "clock-frequency". There
should be a fallback mechanism to handle a case where this property if not
present in DT it should be read from the prci driver.
This patch series uses the clk_get_rate method to fetch proper core clock
frequency. The series is based on U-Boot commit f2a73d6867ef ("Merge tag
'u-boot-stm32-20200214' of https://gitlab.denx.de/u-boot/custodians/u-boot-stm")
Thanks to Vincent Chen <vincent.chen at sifive.com> for testing this patch.
=>-----------------------Log for reference------------------------
=> cpu detail
0: cpu at 1 rv64imafdc
ID = 1, freq = 4.30 GHz <= Before patch
1: cpu at 2 rv64imafdc
ID = 2, freq = 4.30 GHz
2: cpu at 3 rv64imafdc
ID = 3, freq = 4.30 GHz
3: cpu at 4 rv64imafdc
ID = 4, freq = 4.30 GHz
.................................................................
=> cpu detail
0: cpu at 1 rv64imafdc
ID = 1, freq = 999.100 MHz <= After patch
1: cpu at 2 rv64imafdc
ID = 2, freq = 999.100 MHz
2: cpu at 3 rv64imafdc
ID = 3, freq = 999.100 MHz
3: cpu at 4 rv64imafdc
ID = 4, freq = 999.100 MHz
Sagar Shrikant Kadam (2):
fu540: prci: add request and free clock handlers
cpu: clk: riscv: populate proper CPU core clk frequency
drivers/clk/sifive/fu540-prci.c | 24 ++++++++++++++++++++++++
drivers/cpu/riscv_cpu.c | 39 ++++++++++++++++++++++++++++++++++++++-
2 files changed, 62 insertions(+), 1 deletion(-)
U-Boot cmd "cpu detail" shows wrong values, as the current cpu driver is fetching cpu_freq by reading the dt node property "clock-frequency". There should be a fallback mechanism to handle a case where this property if not present in DT it should be read from the prci driver. This patch series uses the clk_get_rate method to fetch proper core clock frequency. The series is based on U-Boot commit f2a73d6867ef ("Merge tag 'u-boot-stm32-20200214' of https://gitlab.denx.de/u-boot/custodians/u-boot-stm") Thanks to Vincent Chen <vincent.chen at sifive.com> for testing this patch. =>-----------------------Log for reference------------------------ => cpu detail 0: cpu at 1 rv64imafdc ID = 1, freq = 4.30 GHz <= Before patch 1: cpu at 2 rv64imafdc ID = 2, freq = 4.30 GHz 2: cpu at 3 rv64imafdc ID = 3, freq = 4.30 GHz 3: cpu at 4 rv64imafdc ID = 4, freq = 4.30 GHz ................................................................. => cpu detail 0: cpu at 1 rv64imafdc ID = 1, freq = 999.100 MHz <= After patch 1: cpu at 2 rv64imafdc ID = 2, freq = 999.100 MHz 2: cpu at 3 rv64imafdc ID = 3, freq = 999.100 MHz 3: cpu at 4 rv64imafdc ID = 4, freq = 999.100 MHz Sagar Shrikant Kadam (2): fu540: prci: add request and free clock handlers cpu: clk: riscv: populate proper CPU core clk frequency drivers/clk/sifive/fu540-prci.c | 24 ++++++++++++++++++++++++ drivers/cpu/riscv_cpu.c | 39 ++++++++++++++++++++++++++++++++++++++- 2 files changed, 62 insertions(+), 1 deletion(-)