[v12,0/2] spi: loongson: add bus driver for the loongson spi

Loongson platform support spi hardware controller and this series patch
was to add spi driver and binding support.

Change in v2:
		1. This [PATCH v2 1/2] dt-bindings patch need depend on clk patch:
	 	   https://
		   lore.kernel.org/all/20230307115022.12846-1-zhuyinbo@loongson.cn/
		2. Remove the clock-names in spi yaml file.
		3. Add "loongson,ls7a-spi" compatible in spi yaml file.
		4. Add an || COMPILE_TEST and drop && PCI then add some CONFIG_PCI
		   macro to limit some pci code.
		5. Make the spi driver top code comment block that use C++ style.
		6. Drop spi->max_speed_hz.
		7. Add a spin_lock for loongson_spi_setup.
		8. Add a timeout and cpu_relax() in loongson_spi_write_read_8bit.
		9. Add spi_transfer_one and drop transfer and rework entire spi
		   driver that include some necessary changes.
		10. Use module_init replace subsys_initcall.
		11. About PM interface that I don't find any issue so I don't add
		    any changes.
Change in v3:
		1. This [PATCH v3 1/2] dt-bindings patch need depend on clk patch:
		   https://
		   lore.kernel.org/all/20230323025229.2971-1-zhuyinbo@loongson.cn/
		2. Drop the unused blank line in loongson,ls-spi.yaml file.
		3. Replace clock minItems with clock maxItems in yaml file.
		4. Separate spi driver into platform module, pci module and core
		   module.
		5. Replace DIV_ROUND_UP with DIV_ROUND_UP_ULL to fix compile error
		   "undefined reference to `__aeabi_uldivmod'" and  "__udivdi3 undefined"
		   that reported by test robot.
		6. Remove the spin lock.
		7. Clear the loongson_spi->hz and loongson_spi->mode in setup to fixup
		   the issue that multiple spi device transfer that maybe cause spi was
		   be misconfigured.
Change in v4:
		1. This [PATCH v4 1/2] dt-bindings patch need depend on clk patch:
		   https://
		   lore.kernel.org/all/20230323025229.2971-1-zhuyinbo@loongson.cn/
		2. Add "#include <linux/io.h>" in spi-loongson-core.c for fix the compile
		   issue which devm_ioremap no declaration.
		3. Add "EXPORT_SYMBOL_GPL(loongson_spi_dev_pm_ops)" in
		   spi-loongson-core.c for fix the compile issue which
		   loongson_spi_dev_pm_ops undefined.
Change in v5:
		1. Get rid of the clock patch's dependency and open-code the clock IDs.
		2. Fixup checkpatch issue that by installed ply and gitpython package
		   locally, but this series of patch's code doesn't have any change.
Change in v6:
		1. Remove the "#include <dt-bindings/clock/loongson,ls2k-clk.h>" in
		   yaml file.
Change in v7:
		1. Remove the "loongson,ls7a-spi" and change yaml file name as
		   "loongson,ls2k-spi.yaml".
		2. Use module_pci_driver and module_platform_driver to replace
		   module_init and module_exit.
		3. Drop ".owner	= THIS_MODULE" in spi platform driver.
		4. Add devm_spi_alloc_master devm_spi_register_master to simplify code.
		5. Add pci_disable_device() in loongson_spi_pci_unregister.
Change in v8:
		1. Add reviewed-by information for spi bindings patch.
		2. Fixup the uncorrect spi yaml file path in MAINTAINERS file.
		3. Add spi_master_suspend and spi_master_resume in spi pm function.
Change in v9:
		1. Make spi_master_suspend go first in pm suspend.
Change in v10:
		1. Fix the compile issue about of_node_get and of_get_property no
		   declaration.
		2. set config SPI_LOONGSON_CORE invisible.
		3. Captial "spi" in commit log and Kconfig file.
		4. Write header files in alphabetical order.
		5. Use clamp_val, GENMASK() and BIT() in spi clock setting.
		6. Optimize clock and mode setting code.
		7. Use readb_poll_timeout in loongson_spi_write_read_8bit.
		8. Remove some useless dmesg print.
		9. Use device_set_node replace of_node_get.
		10. Use dev_err_probe in code.
		11. Use devm_clk_get_optional replace devm_clk_get.
		12. Remove SPI_NO_CS for drop 2k500 non common type spi.
		13. Use pcim_enable_device() and pcim_iomap_regions() in spi pci
		    driver.
		14. Passing the remapped address in loongson_spi_init_master.
		15. Remove the useless goto flag "err_out".
		16. Use pci vendor id in pci_ids.h.
		17. Use devm_platform_ioremap_resource in spi platform driver.
		18. Remove the useless item in pci_device_id.
		19. Remove the inned comma in of_device_id.
		20. Add some headfile in spi_loongson.h.
		21. Remove the useless extern for loongson_spi_init_master in
		    spi_loongson.h.
Change in v11:
		1. Use spi_get_chipselect() to replace all spi->chip_select in
		   spi driver
Change in v12:
		1. Reword the dt-bindings patch title.
		2. Use a specific spi compatible in dt-bindings and spi driver.
		3. Add Cc list for the reviewers of the previous version.
		4. Add a static for rdiv[12] array in loongson_spi_set_clk.
		5. Fixup the compile warning for spi HZ that reported by robot.
		6. Use "#define LOONGSON_... BIT(0)" in readb_poll_timeout.
		7. Add a error code return that when write spi failed.
		8. Use spi_controller* instead of spi_master* in all cases.
		9. Check for the error first which for clock gain.
		10. Drop the ->remove() in spi pci driver.
		11. Drop the comma for the terminator entry in pci_device_id.
		12. Adjust the head file in spi driver.
		13. Use forward declarations for device and spi_controller.

Yinbo Zhu (2):
  spi: add loongson spi bindings
  spi: loongson: add bus driver for the loongson spi controller

 .../bindings/spi/loongson,ls2k-spi.yaml       |  41 +++
 MAINTAINERS                                   |  10 +
 drivers/spi/Kconfig                           |  26 ++
 drivers/spi/Makefile                          |   3 +
 drivers/spi/spi-loongson-core.c               | 275 ++++++++++++++++++
 drivers/spi/spi-loongson-pci.c                |  55 ++++
 drivers/spi/spi-loongson-plat.c               |  47 +++
 drivers/spi/spi-loongson.h                    |  49 ++++
 8 files changed, 506 insertions(+)