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Pali Rohár f395cf9cac arm: kirkwood: 88f6281: Detect CONFIG_SYS_TCLK from SAR register 
Bit 21 in SAR register specifies if TCLK is running at 166 MHz or 200 MHz.
This information is undocumented in public Marvell Kirkwood Functional
Specifications [2], but is available in Linux v3.15 kirkwood code [1].

Commit 8ac303d49f ("arm: kirkwood: Do not overwrite CONFIG_SYS_TCLK")
broke support for Marvell 88F6281 SoCs because it was expected that all
those SoCs have TCLK running at 200 MHz as specified in Marvell 88F6281
Hardware Specifications [3].

Fix broken support for 88F6281 by detecting CONFIG_SYS_TCLK from SAR
register, like it was doing Linux v3.15.

[1] - https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/arch/arm/mach-kirkwood/common.c?h=v3.15#n542
[2] - https://web.archive.org/web/20130730091033/http://www.marvell.com/embedded-processors/kirkwood/assets/FS_88F6180_9x_6281_OpenSource.pdf
[3] - https://web.archive.org/web/20120620073511/http://www.marvell.com/embedded-processors/kirkwood/assets/HW_88F6281_OpenSource.pdf

Update by Stefan 2022-08-23:
- Fix compilation error for ds109

Fixes: 8ac303d49f ("arm: kirkwood: Do not overwrite CONFIG_SYS_TCLK")
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
2022-08-23 12:38:47 +02:00
..
cpu layerscape: Disable CONFIG_FMAN_ENET on *aqds* platforms 2022-08-20 21:18:15 -04:00
dts Restore pcm051_rev3_defconfig config 2022-08-20 16:40:14 -04:00
include net: lpc32xx_eth.c ethernet driver 2022-08-20 21:18:15 -04:00
lib ARM: relocate: Fix Thumb code by using proper label type 2022-07-26 17:53:43 -04:00
mach-apple arm: apple: Add initial Apple M2 support 2022-07-25 09:38:47 -04:00
mach-aspeed aspeed/spl: Remove OVERLAY from linker script 2022-07-06 14:32:00 -04:00
mach-at91 arm: Remove snapper9260 board 2022-08-12 16:10:50 -04:00
mach-bcm283x
mach-bcmbca arm: bcmbca: introduce the bcmbca architecture and 47622 SOC 2022-06-10 13:37:32 -04:00
mach-bcmstb
mach-cortina
mach-davinci arm: Remove unused references to CONFIG_SOC_DM* 2022-07-25 14:57:27 -04:00
mach-exynos arm: samsung: Migrate a number of symbols to Kconfig 2022-06-28 17:04:37 -04:00
mach-highbank
mach-hpe ARM: hpe: gxp: add core support 2022-06-22 21:30:04 -04:00
mach-imx arm: Remove warp board 2022-08-20 22:45:00 -04:00
mach-integrator arm: integrator: Migrate platform-specific options and cleanup armcoremodule.h 2022-04-08 09:05:19 -04:00
mach-ipq40xx
mach-k3 arm: mach-k3: security: Remove certificate if detected on GP device 2022-08-04 15:32:20 -04:00
mach-keystone i2c: Remove non-DM_I2C support from davinci_i2c.c 2022-07-08 17:57:34 -04:00
mach-kirkwood arm: kirkwood: 88f6281: Detect CONFIG_SYS_TCLK from SAR register 2022-08-23 12:38:47 +02:00
mach-lpc32xx net: lpc32xx_eth.c ethernet driver 2022-08-20 21:18:15 -04:00
mach-mediatek
mach-meson ARM: meson: fixup error on efuse commands return 2022-08-08 09:56:38 +02:00
mach-mvebu arm: mvebu: mbus: Fix mbus driver to work also after U-Boot relocation 2022-08-23 12:35:37 +02:00
mach-nexell video: Drop references to CONFIG_VIDEO et al 2022-03-28 20:17:07 +02:00
mach-npcm arm: nuvoton: Add support for Nuvoton NPCM750 BMC 2022-05-05 09:28:47 -04:00
mach-octeontx
mach-octeontx2
mach-omap2 arm: Remove cm_t335 board 2022-08-20 21:18:15 -04:00
mach-orion5x arm: Remove edminiv2 board 2022-08-20 21:18:15 -04:00
mach-owl
mach-qemu
mach-rmobile arm: Remove kzm9g board 2022-08-20 21:18:15 -04:00
mach-rockchip Merge branch 'next' 2022-07-11 14:58:57 -04:00
mach-s5pc1xx
mach-snapdragon board: qualcomm: Add support for QCS404 EVB 2022-07-25 13:02:04 -04:00
mach-socfpga socfpga: arria10: Allow dcache_enable before relocation 2022-07-01 14:57:15 +08:00
mach-sti stm32mp1: fix reference for STMicroelectronics 2022-06-17 14:12:27 +02:00
mach-stm32 configs: stm32f746-disco: Migrate SPL flags to defconfig 2022-05-10 13:56:12 +02:00
mach-stm32mp stm32mp: add support of STM32MP13x Rev.Y 2022-07-12 11:47:34 +02:00
mach-sunxi sunxi: Move INITIAL_USB_SCAN_DELAY to driver Kconfig 2022-07-18 23:48:09 +01:00
mach-tegra Convert CONFIG_TEGRA_GPU to Kconfig 2022-06-28 17:03:31 -04:00
mach-u8500
mach-uniphier serial: Replace CONFIG_DEBUG_UART_BASE by CONFIG_VAL(DEBUG_UART_BASE) 2022-06-06 18:01:21 -04:00
mach-versal spi: cadence_qspi: Enable apb linear mode for apb read & write operations 2022-06-29 16:00:31 +02:00
mach-versatile
mach-zynq fpga: xilinx: add bitstream flags to driver desc 2022-07-26 09:34:21 +02:00
mach-zynqmp mailbox: zynqmp: Move struct zynqmp_ipi_msg from sys_proto.h 2022-07-26 08:36:20 +02:00
mach-zynqmp-r5
thumb1/include/asm/proc-armv
config.mk linker_lists: Rename sections to remove . prefix 2022-06-23 12:58:18 -04:00
Kconfig arm: Set default MACH_TYPE in Kconfig 2022-08-20 16:17:50 -04:00
Kconfig.debug
Makefile arm: makefile: cleanup mach-imx usage 2022-07-26 11:29:00 +02:00