While adding device-tree support for NOR memories, it became apparent that there is no common way for configuring various GPMC settings for devices that interface to the GPMC. These settings include bus-width, synchronous/asynchronous mode, burst settings, wait monitoring etc. Therefore, to simplify the GPMC code and add device-tree support for NOR, it was first necessary to consolidate how these settings are programmed. Series based upon Mark Jackson's patch [1] and Ezequiel Garcia GPMC clean-up series [2]. Entire series available here [3]. V4 changes: - Updated to v3.9-rc3 and fixed merge issue reported in V3 by Ezequiel. - Fixed-up comments reported by Ezequiel. - Made use of of_property_read_bool() as suggested by Rob Herring. - Added "-ps" and "-ns" suffixes to GPMC DT timing properties as requested by Rob Herring to make it clearer what the timing values represent. V3 changes: - Rebased on RMK's IS_ERR_VALUE() patch and removed usage of IS_ERR_VALUE() from series. - Fixed BUG in NAND code introduced in V2 by making gpmc_settings structure a local variable (I forgot to initialise structure to zero). - Added fix from Javier to correct return value from gpmc_probe_nor(). V2 changes: - Made gpmc_settings structure local in gpmc_nand_init(). - Use resource_size() API in probe_nor(). - Add kernel-doc for gpmc_cs_program_settings() function. - Use of_platform_device_create() to register NOR devices in probe_nor(). - Add support for GPMC address-address-data multiplexing which required changing GPMC DT property "gpmc,mux-add-data" to store a 32-bit value and changing mux_add_data member of gpmc_settings to be a 32-bit type instead of bool. - Add detection for incorrect GPMC chip-select base addresses. - Cleaned-up code in gpmc_mem_init() and changed gpmc_mem_init() so that it would not return an error when the GPMC driver is being probed. V1 changes: - Clean-up/simplification of ONENAND initialisation code. - Add a new GPMC structure to unify storage of various GPMC settings (that are non-timing related) for client devices and add a new function to program these settings in a common way. - Migrate initialisation code for existing flash, usb and networking devices to use the new structure and function for GPMC settings. - Add device-tree support for NOR flash memories. - Add additional GPMC timing parameters to GPMC device-tree binding. - Update GPMC NAND and ONENAND device-tree support to retrieve GPMC settings from device-tree. Testing includes: - Boot testing on OMAP2420 H4, OMAP3430 SDP and OMAP4430 SDP with and without device-tree present. - OMAP2420 H4 board has NOR flash and OMAP3430 SDP has NOR, NAND and ONENAND flash. So verified that flash is detected on boot as expected. Note additional patches [4] are required for OMAP2420 H4 and OMAP3430 SDP dts files in order to enable flash memory support. - All of the above boards use GPMC for interfacing to a networking chip and so verified that networking is working wit this series. However, please note that networking is not currently supported on these boards when booting with DT and so networking is only tested without DT. [1] http://permalink.gmane.org/gmane.linux.ports.arm.omap/94765 [2] http://comments.gmane.org/gmane.linux.ports.arm.omap/93784 [3] https://github.com/jonhunter/linux/tree/omap-gpmc-for-v3.10 [4] https://github.com/jonhunter/linux/tree/omap-dt-for-v3.10 Javier Martinez Canillas (1): ARM: OMAP2+: return -ENODEV if GPMC child device creation fails Jon Hunter (17): ARM: OMAP2+: Simplify code configuring ONENAND devices ARM: OMAP2+: Add variable to store number of GPMC waitpins ARM: OMAP2+: Add structure for storing GPMC settings ARM: OMAP2+: Add function for configuring GPMC settings ARM: OMAP2+: Convert ONENAND to use gpmc_cs_program_settings() ARM: OMAP2+: Convert NAND to use gpmc_cs_program_settings() ARM: OMAP2+: Convert SMC91x to use gpmc_cs_program_settings() ARM: OMAP2+: Convert TUSB to use gpmc_cs_program_settings() ARM: OMAP2+: Don't configure of chip-select options in gpmc_cs_configure() ARM: OMAP2+: Add function to read GPMC settings from device-tree ARM: OMAP2+: Add additional GPMC timing parameters ARM: OMAP2+: Add device-tree support for NOR flash ARM: OMAP2+: Convert NAND to retrieve GPMC settings from DT ARM: OMAP2+: Convert ONENAND to retrieve GPMC settings from DT ARM: OMAP2+: Detect incorrectly aligned GPMC base address ARM: OMAP2+: Remove unnecesssary GPMC definitions and variable ARM: OMAP2+: Allow GPMC probe to complete even if CS mapping fails Documentation/devicetree/bindings/bus/ti-gpmc.txt | 103 ++-- Documentation/devicetree/bindings/mtd/gpmc-nor.txt | 98 ++++ .../devicetree/bindings/mtd/gpmc-onenand.txt | 3 + arch/arm/mach-omap2/gpmc-nand.c | 39 +- arch/arm/mach-omap2/gpmc-onenand.c | 110 +++-- arch/arm/mach-omap2/gpmc-smc91x.c | 30 +- arch/arm/mach-omap2/gpmc.c | 513 +++++++++++++++----- arch/arm/mach-omap2/gpmc.h | 37 +- arch/arm/mach-omap2/usb-tusb6010.c | 62 ++- 9 files changed, 712 insertions(+), 283 deletions(-) create mode 100644 Documentation/devicetree/bindings/mtd/gpmc-nor.txt -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
