On Mon, Nov 27, 2023 at 07:49:34AM +0100, Ahmad Fatoum wrote: > We only had rudimentary STM32MP13 support, because proper control of the > clocks and resets required communicating with OP-TEE as the RCC > peripheral was restricted to the secure world on that SoC. > > Back when STM32MP13 support was added, this limitation was worked around > by defining placeholder fixed clocks and skipping resets for the MMC and > other hardware that was known to be initialized by previous boot stages. > > When the upstream kernel device tree dropped the fixed clocks in favor > of describing the actual setup with SCMI-over-OPTEE providing access to > the root clocks, barebox support for the STM32MP13 was broken. > > This series restores barebox compatibility with the Linux device tree, > so barebox can once again startup and Linux can be booted. > > Notably missing is Ethernet support, which doesn't yet exist in the > mainline kernel. USB on the DK also uses a STM32 MCU as Type C > controller and I haven't investigated how much of this barebox needs to > know about to get OTG working. USB host works fine however. > > Once enabled, it's possible to use the same barebox binary for both > STM32MP13 and STM32MP15 and only changing the BL32 device tree in the > FIP. STM32MP13 support is not yet enabled in the device tree as setting > CONFIG_OPTEE_SIZE to 48M as expected by the STM32MP13-DK firmware will > take away 48M of memory from Linux, even on the STM32MP15 board. > > We'll want to fix that before enabling it in the defconfig, but this > shouldn't keep us from fixing STM32MP13 support in general. > > This series depends on enabling use of OP-TEE as SCMI transport, added > in <20231127064034.2206788-2-a.fatoum@xxxxxxxxxxxxxx> > > Ahmad Fatoum (13): > clk: stm32mp1: build only when STM32MP15 support is enabled > clk: factor out clk_hw_get_parent_index > include: add initial <linux/clk-provider.h> > clk: divider: implement CLK_DIVIDER_ALLOW_ZERO > clk: divider: implement divider_[ro_]round_rate_parent > clk: implement clk clk_hw_get_parent_by_index > clk: add struct clk_init_data::parent_hws > clk: implement clk_hw_reparent > clk: add STM32MP13 clock and reset drivers > pinctrl: stm32: match st,stm32mp135-pinctrl DT compatible > aiodev: stm32: add STM32MP13x support > ARM: stm32mp: 135-DK: enable environment, bbu handler and deep probe > ARM: stm32mp: remove STM32MP13 .stm32 image Applied, thanks Sascha > > arch/arm/boards/stm32mp13xx-dk/Makefile | 2 +- > arch/arm/boards/stm32mp13xx-dk/board.c | 25 + > arch/arm/boards/stm32mp13xx-dk/lowlevel.c | 19 - > arch/arm/dts/stm32mp135f-dk.dts | 9 + > drivers/aiodev/stm32-adc.c | 14 + > drivers/clk/Kconfig | 10 + > drivers/clk/Makefile | 3 +- > drivers/clk/clk-divider.c | 41 +- > drivers/clk/clk.c | 139 +- > drivers/clk/stm32/Makefile | 1 + > drivers/clk/stm32/clk-stm32-core.c | 680 ++++++++ > drivers/clk/stm32/clk-stm32-core.h | 188 +++ > drivers/clk/stm32/clk-stm32mp13.c | 1611 +++++++++++++++++++ > drivers/clk/stm32/reset-stm32.c | 122 ++ > drivers/clk/stm32/reset-stm32.h | 8 + > drivers/clk/stm32/stm32mp13_rcc.h | 1748 +++++++++++++++++++++ > drivers/pinctrl/pinctrl-stm32.c | 1 + > images/Makefile.stm32mp | 1 - > include/linux/clk-provider.h | 185 +++ > include/linux/clk.h | 21 + > 20 files changed, 4776 insertions(+), 52 deletions(-) > create mode 100644 arch/arm/boards/stm32mp13xx-dk/board.c > delete mode 100644 arch/arm/boards/stm32mp13xx-dk/lowlevel.c > create mode 100644 drivers/clk/stm32/Makefile > create mode 100644 drivers/clk/stm32/clk-stm32-core.c > create mode 100644 drivers/clk/stm32/clk-stm32-core.h > create mode 100644 drivers/clk/stm32/clk-stm32mp13.c > create mode 100644 drivers/clk/stm32/reset-stm32.c > create mode 100644 drivers/clk/stm32/reset-stm32.h > create mode 100644 drivers/clk/stm32/stm32mp13_rcc.h > create mode 100644 include/linux/clk-provider.h > > -- > 2.39.2 > > > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
