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* serial: lpuart: Avoid division by zero when requested baudrate isAndrey Smirnov2018-08-131-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | With serdev device support added there's now a corner case where: 1. There is a DT node for a serdev device on one of the UARTs 2. There is no driver that binds against serdev device's compatibility string with 1 and 2 being true it is possible to end up in a situation where a particualr UART has not been initalized to any baudrate when clock_notifier_call_chain() gets called. This effectively translates to set_baudrate(uart, 0); which for LPUART driver result in a division by zero. To avoid this problem, convert lpuart_serial_setbaudrate() to treat zero baudrate as a request to disable the UART. While we are at it add a BUG_ON() to lpuart_setbrg() to simplify finding any future bugs. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* usb: gadget: allow to actually enable sparse fastboot supportUwe Kleine-König2018-08-081-3/+3
| | | | | | | | | | | | | | | When sparse support was (intended to be) made optional it was effectively unconditionally disabled because IS_ENABLED(USB_GADGET_FASTBOOT_SPARSE) always evaluates to 0. To actually make use of the introduced kconfig symbol the CONFIG_ prefix must not be skipped. Fixes: f4b5d3eeb607 ("usb: gadget: fastboot: Make sparse support optional") Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Tested-by: Gavin Schenk <g.schenk@eckelmann.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/misc'Sascha Hauer2018-07-098-6/+28
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| * net: designware: make sure DMA is disabled on kernel start.Oleksij Rempel2018-07-024-0/+11
| | | | | | | | | | | | | | | | Halt is not automatically executed if we start the kernel. So, we may have potentially memory corruptions. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * drivers: of: Make use of devpath_to_name()Andrey Smirnov2018-06-251-4/+2
| | | | | | | | | | Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * video: backlight: add slew time parameterLucas Stach2018-06-212-2/+13
| | | | | | | | | | | | | | | | | | | | | | | | Currently the backlight implementation stretches a brightness change over a period of 100ms. While this is a fine default for PWM backlights, a user might wish to change this slew time to meet other constraints or even completely disable it for some backlight devices. Add a parameter and provide the default value from the backlight device. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * nand-bb: mtd_del_bb: fix missing pointer resetHeinrich Toews2018-06-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | If an attached bb device was removed before the actual mtd device the code would try due to a missing pointer reset to access the no more present bb device handle which leads to a page fault. This bug was made visible by commit "7649473 mtd: nand: remove automatically created bb devices" which relys on a correct mtd->cdev_bb handling. Signed-off-by: Heinrich Toews <heinrich.toews@wago.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | Merge branch 'for-next/imx8mq'Sascha Hauer2018-07-091-0/+1
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| * | ARM: i.MX: ocotp: Provide missing .format_mac for i.MX8MQSascha Hauer2018-06-151-0/+1
| |/ | | | | | | | | | | | | | | Provide missing .format_mac for i.MX8MQ to prevent driver from crashing on start. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | Merge branch 'for-next/imx'Sascha Hauer2018-07-0915-64/+582
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| * | mtd: gpmi-nand: Make sure clock is disabled during rate changeSascha Hauer2018-07-062-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On i.MX6 GPMI Nand controller the clock must be disabled during a rate change. Otherwise glitches on the clock line may occur which result in errors like: MXS NAND: Error sending command MXS NAND: DMA read error There were previous attempts to fix this. One is in: 54961378f0 imx6: clk: Gate off ENFC clock before setting clock rate This patch added a clk_disable() right before the rate change. Since a clk_disable() on a disabled clk is a no-op, the patch added a clk_enable() to the i.MX6 clk driver in the hope that the clk is enabled in the nand driver probe and the clk_disable() really takes place. This patch doesn't work. First of all it enabled the enfc_podf clk which was not the one that was actually disabled in the nand driver, resulting in the nand drivers call to clk_disable() still being a no-op. Then this patch also only works only on the classic i.MX6 which was the only one supported at that time, but not on the i.MX6UL, i.MX6SX and i.MX6SL which have a separate clk driver. Instead of adding more quirks to the other i.MX6 clk drivers, fix this in the GPMI driver. We no longer call clk_disable() on a disabled clk, but instead do a clk_enable() first which makes sure the hardware state is synchronized to the usage count and the following clk_disable() is really effective. At the same time we can (and actually must) remove the quirk in the i.MX6 clk driver. Also add clk_disable()/clk_enable() around another rate change in the GPMI driver. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | clk: imx: remove unused clk_gate2_invertedSascha Hauer2018-07-061-17/+0
| | | | | | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | nvmem: rave-sp-eeprom: Add support for "zii,eeprom-name"Andrey Smirnov2018-07-051-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Upstream kernel driver allows specifying EEPROM name via "zii,eeprom-name" property. Add code to support that in Barebox as well. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | nvmem: rave-sp-eeprom: Remove VLA usageAndrey Smirnov2018-07-051-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a backport of patch [1] by Kees Cook [1] https://lkml.kernel.org/r/20180620182600.GA24297@beast Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | mtd: mtd_dataflash: Don't print bogus command values for READsAndrey Smirnov2018-07-021-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Call to dev_dbg in dataflash_read() is located to early, before command[] is initialize to correct values, so it end up printing values from previous invocation. Move it such that it prints current call's values. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | nvmem: Introduce nvmem_cell_get_and_read()Andrey Smirnov2018-06-291-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce nvmem_cell_get_and_read() that combines getting a NVMEM cell by name and reading its contents. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Reviewed-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | watchdog: rave-sp-wdt: Explicitly access EEPROM for bootsourceAndrey Smirnov2018-06-261-38/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RAVE SP firmware versions found on RDU2 provide decicated bootsource manipulation commands, which, under the hood, are just thin wrappers around write/read to a particular location in EEPROM. Unfortunately, RAVE SP firmware found on RDU1, does not provide any dedicated bootsource commands and its users are expected to access EEPROM directly. In order to avoid having separate code paths for handling those two cases, convert the code to access EEPROM directly via NVMEM API. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | watchdog: rave-sp-wdt: Remove bogus leftover codeAndrey Smirnov2018-06-261-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | This code should've been removed when the driver was rebased against latest watchdog plumbing in Barebox. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | usb: imx: implement support for limiting host to full speedNikita Yushchenko2018-06-263-0/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is needed when host is known to not work properly in high speed mode. In linux, chipidea driver supports 'maximum-speed' device tree property. When that is set to "full-speed", driver sets PFSC bit in PORTSC register, which disallows use of high speed mode. This patch implements same support for barebox. Important technical detail is that PFSC bit is cleared by port reset, thus setting it has to be done in ehci->init() callback which is called after ehci_reset(). Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | video: Port RAVE SP backlight driver from Linux kernelAndrey Smirnov2018-06-213-0/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a minimal port of a kernel commit 6552d3141064 ("backlight: Add RAVE SP backlight driver"). All of the changes were kept to a minimum and limited to impedance matching between Barebox/Linux driver API. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | nvmem: Port RAVE SP EEPROM driver from Linux kernelAndrey Smirnov2018-06-213-1/+372
| |/ | | | | | | | | | | | | | | | | This is a minimal port of a kernel commit 3b51f47be171 ("nvmem: Add RAVE SP EEPROM driver"). All of the changes were kept to a minimum and limited to impedance matching between Barebox/Linux driver API. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* / dts: update to v4.18-rc1Sascha Hauer2018-06-221-9/+8
|/ | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Merge branch 'for-next/of-bootsource'Sascha Hauer2018-06-111-5/+0
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| * of: Make of_property_get_value() publicAndrey Smirnov2018-05-181-5/+0
| | | | | | | | | | | | | | | | Make of_property_get_value() public, so it can be used in other part of the system. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | Merge branch 'for-next/misc'Sascha Hauer2018-06-111-61/+55
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| * | mtd: nand: omap_gpmc: fix: remove bch4 string extantHeinrich.Toews@wago.com2018-05-311-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove an erroneous bch4 string leftover that leads to a false ecc mode mapping. BCH4 support was previously removed by Teresa Remmet: d316cda 'mtd: nand: omap_gpmc: Remove BCH4 support' Signed-off-by: Heinrich Toews <heinrich.toews@wago.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | mtd: nand: nand_omap_gpmc: Fix ecc stepsTeresa Remmet2018-05-241-60/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The eccsteps where set wrong for OMAP_ECC_BCH8_CODE_HW_ROMCODE. So the ECC was only corrected for the first 512 bytes chunk of a 2k page. Moved out the ecc step iteration out of the correcting loop to make it more alike the generic nand functions. And made sure that the ECC is caclulated for all chunks. This patch is based on work of Sascha Hauer. Fixes commit dec7b4d2bf9c ("mtd: nand_omap_gpmc: fix BCH error correction"). Signed-off-by: Teresa Remmet <t.remmet@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | | Merge branch 'for-next/mips'Sascha Hauer2018-06-112-2/+4
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| * | | i2c-mux-pca954x: fix out-of-bounds write for 64 bit systemsPeter Mamonov2018-05-241-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | get_drv_data(..., &data->type) overwrites memory beyond data->type member due to mismatch of sizeof(enum pca_type) and sizeof(void *) on 64 bit systems. Signed-off-by: Peter Mamonov <pmamonov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | mtd: cfi-flash: fix write_buff() for 64 bit systemsPeter Mamonov2018-05-241-1/+1
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | write_buff() uses ~(flash_info.portwidth - 1) to mask lower bits of addr. This causes higher 32 bits of addr to be discarded on a 64 bit system, since flash_info.portwidth is 32 bits long (unsigned int) and addr is 64 bits long (unsigned long). Signed-off-by: Peter Mamonov <pmamonov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | | Merge branch 'for-next/imx-ocotp'Sascha Hauer2018-06-114-15/+720
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| * | | ARM: i.MX: ocotp: Add i.MX8MQ supportSascha Hauer2018-06-082-1/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> [andrew.smirnov@gmail.com: Rebased to account for move to nvmem] Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | nvmem: ocotp: Convert to NVMEM deviceAndrey Smirnov2018-05-311-3/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Not that barebox has a proper NVMEM subsystem, convert OCOTP driver to use that to both make things more consistent with Linux and also allow accessing OCOTP fields without the need for imx_ocotp_read_field()/imx_ocotp_write_field(). Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Tested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | nvmem: Use name from struct nvmem_config for cdevAndrey Smirnov2018-05-311-15/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Original name, 'nvmemN', doesn't really give any hint about which physical HW it may represent, so change the code to either pick up an DT alias or use the name passed via 'struct nvmem_config'. Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Tested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | i.MX: ocotp: Move OCOTP driver to drivers/nvmemAndrey Smirnov2018-05-313-0/+675
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | Move OCOTP driver to drivers/nvmem to be consistent with Linux kerenel. Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Tested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | | Merge branch 'for-next/imx'Sascha Hauer2018-06-1113-65/+1180
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| * | | clocksource: armv8-timer: Make use of postcore_platform_driver()Andrey Smirnov2018-06-111-5/+1
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | clocksource: armv8-timer: Make armv8_clocksource_read() staticAndrey Smirnov2018-06-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are no users of that function outside of the driver itself, so re-declare it as static. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | pinctrl: i.MX: Add support for i.MX8Andrey Smirnov2018-06-111-6/+50
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | clocksource: armv8-timer: Convert explicit assembly into helpersAndrey Smirnov2018-06-111-11/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move inline assembly related to querying and counter value as well as getting and setting counter frequency register into asm/system.h as well as converting it inot helper functions. This is done to make the code availible to other parts of the system. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | gpio: i.MX: Add i.MX8mq supportSascha Hauer2018-06-111-0/+3
| | | | | | | | | | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | mmc: i.MX esdhc: Add i.MX8 supportSascha Hauer2018-06-111-0/+1
| | | | | | | | | | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | serial: i.MX: Add i.MX8 supportSascha Hauer2018-06-111-1/+4
| | | | | | | | | | | | | | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | clock: Add i.MX8MQ clock driverSascha Hauer2018-06-115-0/+1078
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is based on Lucas' patch sent as "[PATCH v2 4/4] clk: imx: add clock driver for i.MX8MQ CCM" to the mailing list. It will likely need some rework before it is finally merged, so apply the reworks here before merging into barebox. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> [andrew.smirnov@gmail.com: Fix pll type for IMX8MQ_VIDEO2_PLL1] Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | net: fec_imx: Make use of IS_ALIGNEDAndrey Smirnov2018-06-111-1/+1
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | net: fec_imx: Use dma mapping functionsSascha Hauer2018-06-112-6/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than doing DMA on the input buffer address get a proper DMA address from the mapping functions. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | net: fec_imx: remove unnecessary DMA sync opsSascha Hauer2018-06-111-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The fec receive buffers are coherently mapped, no need to dma_sync on them. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | mci: imx-esdhc: use dma mapping functionsSascha Hauer2018-06-111-27/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than relying on the fact that addresses can be just casted into DMA addresses use proper DMA mapping functions. This fixes compiler warnings when we do DMA on this 32bit only device on aarch64 SoCs. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| * | | nvmem: snvs_lpgpr: Drop stray commasAndrey Smirnov2018-05-231-4/+4
| | |/ | |/| | | | | | | | | | Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | | Merge branch 'for-next/clk'Sascha Hauer2018-06-113-4/+137
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