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* [PATCH 0/5] ARM: i.MX8MP: add nominal drive mode support
@ 2024-04-19  6:13 Ahmad Fatoum
  2024-04-19  6:13 ` [PATCH 1/5] ARM: i.MX8M: pass cpu_type parameter to __imx8m_early_clock_init Ahmad Fatoum
                   ` (4 more replies)
  0 siblings, 5 replies; 8+ messages in thread
From: Ahmad Fatoum @ 2024-04-19  6:13 UTC (permalink / raw)
  To: barebox

Unlike the i.MX8MM and i.MX8MN SoCs added earlier, the early setup code
and device tree for the i.MX8MP configures some clocks at frequencies
that are only validated for overdrive mode, i.e. when VDD_SOC is 950 mV.

Boards may want to run their SoC at the lower voltage of 850 mV though
to reduce heat generation and power usage. For this to work, clock rates
need to adhere to the limits of the nominal drive mode.

This needs to be done across both barebox and Linux. This series handles
the barebox side and a separate series will follow for the kernel.

Ahmad Fatoum (5):
  ARM: i.MX8M: pass cpu_type parameter to __imx8m_early_clock_init
  ARM: i.MX8MP: configure PLL3 as 600MHz
  ARM: i.MX8MP: configure PLL3 as noc_io parent
  ARM: i.MX8MP: don't reparent GIC from BootROM default
  ARM: dts: i.MX8MP: Add optional nominal drive mode DTSI

 arch/arm/dts/imx8mp-nominal.dtsi  | 51 +++++++++++++++++++++++++++++++
 arch/arm/mach-imx/imx8m.c         | 42 +++++++++++++++++++------
 include/mach/imx/imx8m-ccm-regs.h |  1 +
 3 files changed, 84 insertions(+), 10 deletions(-)
 create mode 100644 arch/arm/dts/imx8mp-nominal.dtsi

-- 
2.39.2




^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2024-04-22 10:00 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-04-19  6:13 [PATCH 0/5] ARM: i.MX8MP: add nominal drive mode support Ahmad Fatoum
2024-04-19  6:13 ` [PATCH 1/5] ARM: i.MX8M: pass cpu_type parameter to __imx8m_early_clock_init Ahmad Fatoum
2024-04-19  6:13 ` [PATCH 2/5] ARM: i.MX8MP: configure PLL3 as 600MHz Ahmad Fatoum
2024-04-19  6:13 ` [PATCH 3/5] ARM: i.MX8MP: configure PLL3 as noc_io parent Ahmad Fatoum
2024-04-19  6:13 ` [PATCH 4/5] ARM: i.MX8MP: don't reparent GIC from BootROM default Ahmad Fatoum
2024-04-22  8:52   ` Lucas Stach
2024-04-19  6:13 ` [PATCH 5/5] ARM: dts: i.MX8MP: Add optional nominal drive mode DTSI Ahmad Fatoum
2024-04-22  8:54   ` Lucas Stach

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