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* mtd: nand: fix bug writing 1 byte less than page sizeHector Palacios2016-07-24-1/+1
| | | | | | | | | | | | | | | | | | nand_do_write_ops() determines if it is writing a partial page with the formula: part_pagewr = (column || writelen < (mtd->writesize - 1)) When 'writelen' is exactly 1 byte less than the NAND page size the formula equates to zero, so the code doesn't process it as a partial write, although it should. As a consequence the function remains in the while(1) loop with 'writelen' becoming 0xffffffff and iterating until the watchdog timeout triggers. To reproduce the issue on a NAND with 2K page (0x800): => nand erase.part <partition> => nand write $loadaddr <partition> 7ff Signed-off-by: Hector Palacios <hector.palacios@digi.com>
* mtd: nand: Add a full-id entry for the H27QCG8T2E5R‐BCF NANDBoris Brezillon2016-07-24-0/+4
| | | | | | | Add a full-id entry for the H27QCG8T2E5R‐BCF NAND. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
* mtd: nand: Add the sunxi NAND controller driverBoris Brezillon2016-07-24-3/+1851
| | | | | | | | | | | We already have an SPL driver for the sunxi NAND controller, now add the normal/standard one. The source has been copied from Linux 4.6 with a few changes to make it work in u-boot. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
* mtd: nand: add common DT init codeBrian Norris2016-07-24-0/+70
| | | | | | | | | | | | | | | | | These are already-documented common bindings for NAND chips. Let's handle them in nand_base. If NAND controller drivers need to act on this data before bringing up the NAND chip (e.g., fill out ECC callback functions, change HW modes, etc.), then they can do so between calling nand_scan_ident() and nand_scan_tail(). The original commit has been slightly reworked to use the fdtdec_xxx() helpers (instead of the of_xxxx() ones). Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
* ARM: uniphier: use (devm_)ioremap() instead of map_sysmem()Masahiro Yamada2016-07-24-100/+42
| | | | | | | | This does not have much impact on behavior, but makes code look more more like Linux. The use of devm_ioremap() often helps to delete .remove callbacks entirely. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* mtd: OneNAND: initialize mtd->writebufsize to let UBI workLadislav Michl2016-07-22-0/+1
| | | | | | | io_init checks this value and fails with "bad write buffer size 0 for 2048 min. I/O unit" Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
* mtd: OneNAND: allow board init function failLadislav Michl2016-07-22-15/+15
| | | | Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
* mtd: OneNAND: add timeout to wait ready loopsLadislav Michl2016-07-22-11/+19
| | | | | | | | Add timeout to onenand_wait ready loop as it hangs here indefinitely when chip not present. Once there, do the same for onenand_bbt_wait as well (note: recent Linux driver code does the same) Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
* armv7: make gpmc_cfg constLadislav Michl2016-07-22-1/+2
| | | | | | | | Signed-off-by: Ladislav Michl <ladis@linux-mips.org> [trini: Adapt am33xx, duovero, omap_zoom1] Signed-off-by: Tom Rini <trini@konsulko.com> Signed-off-by: Tom Rini <trini@konsulko.com>
* spl: Lightweight UBI and UBI fastmap supportThomas Gleixner2016-07-22-0/+1170
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Booting a payload out of NAND FLASH from the SPL is a crux today, as it requires hard partioned FLASH. Not a brilliant idea with the reliability of todays NAND FLASH chips. The upstream UBI + UBI fastmap implementation which is about to brought to u-boot is too heavy weight for SPLs as it provides way more functionality than needed for a SPL and does not even fit into the restricted SPL areas which are loaded from the SoC boot ROM. So this provides a fast and lightweight implementation of UBI scanning and UBI fastmap attach. The scan and logical to physical block mapping code is developed from scratch, while the fastmap implementation is lifted from the linux kernel source and stripped down to fit the SPL needs. The text foot print on the board which I used for development is: 6854 0 0 6854 1abd drivers/mtd/ubispl/built-in.o Attaching a NAND chip with 4096 physical eraseblocks (4 blocks are reserved for the SPL) takes: In full scan mode: 1172ms In fastmap mode: 95ms The code requires quite some storage. The largest and unknown part of it is the number of fastmap blocks to read. Therefor the data structure is not put into the BSS. The code requires a pointer to free memory handed in which is initialized by the UBI attach code itself. See doc/README.ubispl for further information on how to use it. This shares the ubi-media.h and crc32 implementation of drivers/mtd/ubi There is no way to share the fastmap code, as UBISPL only utilizes the slightly modified functions ubi_attach_fastmap() and ubi_scan_fastmap() from the original kernel ubi fastmap implementation. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ladislav Michl <ladis@linux-mips.org> Acked-by: Heiko Schocher <hs@denx.de> Reviewed-by: Tom Rini <trini@konsulko.com>
* onenand_spl_simple: Add a simple OneNAND read functionLadislav Michl2016-07-22-0/+48
| | | | Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
* nand_spl_simple: Add a simple NAND read functionThomas Gleixner2016-07-22-0/+62
| | | | | | | | | | | To support UBI in SPL we need a simple NAND read function. Add one to nand_spl_simple and keep it as simple as it goes. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ladislav Michl <ladis@linux-mips.org> Acked-by: Scott Wood <oss@buserror.net> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Heiko Schocher <hs@denx.de>
* mtd: Sort subsystem directories aplhabeticaly in MakefileLadislav Michl2016-07-22-2/+2
| | | | | | Signed-off-by: Ladislav Michl <ladis@linux-mips.org> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Heiko Schocher <hs@denx.de>
* i2c_eeprom: Add reading supportmario.six@gdsys.cc2016-07-22-8/+36
| | | | | | | | | | | | | | This patch implements the reading functionality for the generic I2C EEPROM driver, which was just a non-functional stub until now. Since the page size will be of importance for the writing support, we add suitable members to the private data structure to keep track of it. Compatibility strings for a range of at24c* chips are added. Signed-off-by: Mario Six <mario.six@gdsys.cc> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de>
* Merge branch 'master' of git://www.denx.de/git/u-boot-microblazeTom Rini2016-07-22-29/+36
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| * usb: Kconfig: Add Kconfigs entry USB_EHCI_ZYNQSiva Durga Prasad Paladugu2016-07-22-0/+7
| | | | | | | | | | | | | | | | | | Add Kconfig entry config option for USB_EHCI_ZYNQ and update the same to enable for all zynq boards which supports USB Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
| * dm: clk: Remove simple version of clk_get_by_index/name()Michal Simek2016-07-22-27/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Simple version of clk_get_by_index() added by: "dm: clk: Add a simple version of clk_get_by_index()" (sha1: a4b10c088c4f6ef2e2bba33e8cfea369bcbbce44) is only working for #clock-cells=<1> but not for any other values. Fixed clocks is using #clock-cells=<0> which requires full implementation. Remove simplified versions of clk_get_by_index() and use full version. Also remove empty clk_get_by_name() which is failing when it is called which is useless. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Stephen Warren <swarren@nvidia.com>
| * serial: zynq: Read information about clock from DTMichal Simek2016-07-22-1/+27
| | | | | | | | | | | | | | | | Read information about clock frequency from DT. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com>
| * mmc: sdhci: Disable internal clock enable bitSiva Durga Prasad Paladugu2016-07-22-1/+1
| | | | | | | | | | | | | | | | | | | | | | Disable internal clock by clearing the internal clock enable bit. This bit needs to be cleared too when we stop the SDCLK for changing the frequency divisor. This bit should be set to zero when the device is not using the Host controller. Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
* | Merge git://git.denx.de/u-boot-mpc85xxTom Rini2016-07-21-0/+41
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| * powerpc/mpc85xx: SECURE BOOT- Enable chain of trust in SPLSumit Garg2016-07-21-0/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As part of Chain of Trust for Secure boot, the SPL U-Boot will validate the next level U-boot image. Add a new function spl_validate_uboot to perform the validation. Enable hardware crypto operations in SPL using SEC block. In case of Secure Boot, PAMU is not bypassed. For allowing SEC block access to CPC configured as SRAM, configure PAMU. Reviewed-by: Ruchika Gupta <ruchika.gupta@nxp.com> Signed-off-by: Aneesh Bansal <aneesh.bansal@nxp.com> Signed-off-by: Sumit Garg <sumit.garg@nxp.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: York Sun <york.sun@nxp.com>
* | Merge branch 'master' of git://git.denx.de/u-boot-shTom Rini2016-07-21-0/+31
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| * serial_sh: Add standrad SCI (w/o FIFO) supportYoshinori Sato2016-07-09-0/+3
| | | | | | | | | | | | | | Add support for standard type SCI (without FIFO) port. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
| * serial_sh: Device Tree supportYoshinori Sato2016-07-09-0/+28
| | | | | | | | | | | | | | Add Device Tree bindings. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* | mtd: cfi_flash: fix polling for bit XSR.7 on Intel chipsDaniel Schwierzeck2016-07-20-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | flash_full_status_check() checks bit XSR.7 on Intel chips. This should be done by only checking bit 7 and not by comparing the whole status byte or word with 0x80. This fixes the non-working block erase in the pflash emulation of Qemu when used with the MIPS Malta board. MIPS Malta uses x32 mode to access the pflash device. In x32 mode Qemu mirrors the lower 16 bits of the status word into the upper 16 bits. Thus the CFI driver gets a status word of 0x8080 in x32 mode. If flash_full_status_check() uses flash_isequal(), then it polls for XSR.7 by comparing 0x8080 with 0x80 which never becomes true. Reported-by: Alon Bar-Lev <alon.barlev@gmail.com> Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Signed-off-by: Stefan Roese <sr@denx.de>
* | Various, unrelated tree-wide typo fixes.Robert P. J. Day2016-07-16-9/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a number of typos, including: * "compatble" -> "compatible" * "eanbeld" -> "enabled" * "envrionment" -> "environment" * "FTD" -> "FDT" (for "flattened device tree") * "ommitted" -> "omitted" * "overriden" -> "overridden" * "partiton" -> "partition" * "propogate" -> "propagate" * "resourse" -> "resource" * "rest in piece" -> "rest in peace" * "suport" -> "support" * "varible" -> "variable" Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
* | Merge branch 'master' of http://git.denx.de/u-boot-sunxiTom Rini2016-07-15-22/+1100
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| * | sunxi: Use BROM stored boot_media value to determine our boot-sourceHans de Goede2016-07-15-17/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we know that the BROM stores a value indicating the boot-source at the beginning of SRAM, use that instead of trying to recreate the BROM's boot probing. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
| * | net: Add EMAC driver for H3/A83T/A64 SoCs.Amit Singh Tomar2016-07-15-0/+799
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch add EMAC driver support for H3/A83T/A64 SoCs. Tested on Pine64(A64-External PHY) and Orangepipc(H3-Internal PHY). BIG Thanks to Andre for providing some of the DT code. Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
| * | sunxi: mmc: increase status register polling rate for data transfersTobias Doerffel2016-07-15-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With a recent bunch of SD3.0 cards in our A20-based board we experienced data transfer rates of about 250 KiB/s instead of 10 MiB/s with previous cards from the same vendor (both 4 GB/class 10). By increasing status register polling rate from 1 kHz to 1 MHz we were able to reach the original transfer rates again. With the old cards we now even reach about 16 MiB/s. Signed-off-by: Tobias Doerffel <tobias.doerffel@ed-chemnitz.de> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
| * | sunxi: Support booting from SPI flashSiarhei Siamashka2016-07-15-0/+296
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allwinner devices support SPI flash as one of the possible bootable media type. The SPI flash chip needs to be connected to SPI0 pins (port C) to make this work. More information is available at: https://linux-sunxi.org/Bootable_SPI_flash This patch adds the initial support for booting from SPI flash. The existing SPI frameworks are not used in order to reduce the SPL code size. Right now the SPL size grows by ~370 bytes when CONFIG_SPL_SPI_SUNXI option is enabled. While there are no popular Allwinner devices with SPI flash at the moment, testing can be done using a SPI flash module (it can be bought for ~2$ on ebay) and jumper wires with the boards, which expose relevant pins on the expansion header. The SPI flash chips themselves are very cheap (some prices are even listed as low as 4 cents) and should not cost much if somebody decides to design a development board with an SPI flash chip soldered on the PCB. Another nice feature of the SPI flash is that it can be safely accessed in a device-independent way (since we know that the boot ROM is already probing these pins during the boot time). And if, for example, Olimex boards opted to use SPI flash instead of EEPROM, then they would have been able to have U-Boot installed in the SPI flash now and boot the rest of the system from the SATA hard drive. Hopefully we may see new interesting Allwinner based development boards in the future, now that the software support for the SPI flash is in a better shape :-) Testing can be done by enabling the CONFIG_SPL_SPI_SUNXI option in a board defconfig, then building U-Boot and finally flashing the resulting u-boot-sunxi-with-spl.bin binary over USB OTG with a help of the sunxi-fel tool: sunxi-fel spiflash-write 0 u-boot-sunxi-with-spl.bin The device needs to be switched into FEL (USB recovery) mode first. The most suitable boards for testing are Orange Pi PC and Pine64. Because these boards are cheap, have no built-in NAND/eMMC and expose SPI0 pins on the Raspberry Pi compatible expansion header. The A13-OLinuXino-Micro board also can be used. Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
* | | Merge branch 'master' of git://git.denx.de/u-boot-samsungTom Rini2016-07-15-63/+85
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| * | | mmc: exynos_dw_mmc: support the Driver mode for ExynosJaehoon Chung2016-07-12-0/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch support the driver mode for exynos dwmmc controller. To support the legacy model, maintained the existing code. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
| * | | mmc: exynos_dw_mmc: use the 4bit bus-width by defaultJaehoon Chung2016-07-12-6/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If there is not "samsung,bus-width" property, use the 4bit buswidth by default. Almost all Exnyos SoCs support at least 4bit buswidth. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
| * | | mmc: exynos_dw_mmc: clean the unused and unnecessary codesJaehoon Chung2016-07-12-22/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean the unused and unnecessary codse. This patch is one of them for preparing to use DM. Because it's easy to maintain and combine DM after cleaning codes. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
| * | | mmc: exynos_dw_mmc: add the error control for checking indexJaehoon Chung2016-07-12-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PERIPH_ID_SDMMC4(131) is not continous value with PERIPH_ID_SDMMC0(75). If there is no 'index' property in fdt, then dev_index should be assigned to dev_id(Peripheral ID). At this time, dev_index should be "56". It means Exynos SoC has "56" numbers of DWMMC IP. To prevent this behavior, it needs to check the maximum device index. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
| * | | mmc: exynos_dw_mmc: remove #ifdef for OF_CONTROLJaehoon Chung2016-07-12-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Removed #ifdef for OF_CONTROL. It might use 'OF_CONTROL' by default. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
| * | | mmc: exynos_dw_mmc: remove the unused functionJaehoon Chung2016-07-12-36/+0
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | This function have maintained for supporting Non-FDT. Now, Almost all SoC are changed to fdt style. So there are no that this function is called anywhere. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
* | | Merge git://git.denx.de/u-boot-dmTom Rini2016-07-15-54/+324
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| * | | rockchip: pinctrl: Update the rk3288 driver to support of-platdataSimon Glass2016-07-14-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for of-platdata with rk3288. This requires disabling access to the device tree and renaming the driver to match the string that of-platdata will search for. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | rockchip: clk: Update the rk3288 driver to support of-platdataSimon Glass2016-07-14-2/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for of-platdata with rk3288. This requires decoding the of-platdata struct and setting up the devices from that. Also the driver needs to be renamed to match the string that of-platdata will search for. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | rockchip: clk: Move all DT decoding to ofdata_to_platdata()Simon Glass2016-07-14-1/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is more correct to avoid touching the device tree in the probe() method. Update the driver to work this way. Also add an error check on grf since if that fails then we should not use it. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | rockchip: mmc: Update the driver to support of-platdataSimon Glass2016-07-14-3/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for of-platdata with rk3288. This requires decoding the of-platdata struct and setting up the device from that. Also the driver needs to be renamed to match the string that of-platdata will search for. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | rockchip: mmc: Move all DT decoding to ofdata_to_platdata()Simon Glass2016-07-14-15/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | It is more correct to avoid touching the device tree in the probe() method. Update the driver to work this way. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | rockchip: serial: Add an of-platdata driver for rockchipSimon Glass2016-07-14-0/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a driver that works with of-platdata. It sets up the platform data and calls the standard ns16550 driver. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | dm: serial: ns16550: Update to support of-platdataSimon Glass2016-07-14-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With of-platdata this driver cannot know the format of the of-platdata struct, so we cannot use generic code for accessing the of-platdata. Each SoC that uses this driver will need to set up ns16550's platdata for it. So don't compile in the generic code. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | dm: core: Add an implementation of regmap_init_mem_platdata()Simon Glass2016-07-14-2/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an implementation of this function which mirrors the functions of the automatic device-tree implementation. This can be used with of-platdata to create regmaps. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | dm: core: Move regmap allocation into a separate functionSimon Glass2016-07-14-12/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We plan to add a new way of creating a regmap for of-platdata. Move the allocation code into a separate function so that it can be shared. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | sandbox: Don't bring in the eeprom emulator in SPLSimon Glass2016-07-14-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver should not be used in SPL since we do not have I2C support enabled in SPL on sandbox. Signed-off-by: Simon Glass <sjg@chromium.org>
| * | | dm: core: Expand platdata for of-platdata devicesSimon Glass2016-07-14-11/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Devices which use of-platdata have their own platdata. However, in many cases the driver will have its own auto-alloced platdata, for use with the device tree. The ofdata_to_platdata() method converts the device tree settings to platdata. With of-platdata we would not normally allocate the platdata since it is provided by the U_BOOT_DEVICE() declaration. However this is inconvenient since the of-platdata struct is closely tied to the device tree properties. It is unlikely to exactly match the platdata needed by the driver. In fact a useful approach is to declare platdata in the driver like this: struct r3288_mmc_platdata { struct dtd_rockchip_rk3288_dw_mshc of_platdata; /* the 'normal' fields go here */ }; In this case we have dt_platadata available, but the normal fields are not present, since ofdata_to_platdata() is never called. In fact driver model doesn't allocate any space for the 'normal' fields, since it sees that there is already platform data attached to the device. To make this easier, adjust driver model to allocate the full size of the struct (i.e. platdata_auto_alloc_size from the driver) and copy in the of-platdata. This means that when the driver's bind() method is called, the of-platdata will be present, followed by zero bytes for the empty 'normal field' portion. A new DM_FLAG_OF_PLATDATA flag is available that indicates that the platdata came from of-platdata. When the allocation/copy happens, the DM_FLAG_ALLOC_PDATA flag will be set as well. The dtoc tool is updated to output the platdata_size field, since U-Boot has no other way of knowing the size of the of-platdata struct. Signed-off-by: Simon Glass <sjg@chromium.org>
generated by cgit v1.1 at 2024-11-19 08:15:14 +0000