Lothar Waßmann [Wed, 30 Jan 2019 12:25:45 +0000 (13:25 +0100)]
karo: txul: fix LDO4 output voltage
Currently the LDO4 which supplies the pins of the CSI interface is
programmed for a voltage of 1.8V (default setting for this LDO of the
RN5T567).
Change this to 3.3V to match the specification of the TXUL modules.
Also configure the sleep state voltages for the LDOs.
Lothar Waßmann [Mon, 8 Jan 2018 12:21:28 +0000 (13:21 +0100)]
karo: txul: remove i2c_gpio_pads
The I2C bus for accessing the PMIC uses the soft I2C driver via GPIO
pins. There is no need for reconfiguring the pads for I2C recovery and
no need for a special i2c_gpio_pads definition.
Lothar Waßmann [Mon, 8 Jan 2018 12:14:01 +0000 (13:14 +0100)]
karo: tx6: change drive strength of Ethernet related pads to improve EMC
EMC measurements have revealed excessive noise at multiples of the
50MHz ethernet reference clock on TX6 modules. Changing the drive
strength of the ENET_REF_CLK pad vastly reduces this noise and
improves the signal waveform substanitally.
On TXUL also the MDC and MDIO pads contribute to this noise, since
they are routed off-board for connecting an optional second ethernet
PHY. Adjusting the drive strength for those pads on the TXUL modules
also improves the signal quality and reduces EMI.
Lothar Waßmann [Mon, 8 Jan 2018 11:47:34 +0000 (12:47 +0100)]
imx: mx6: align the SPEED_MED setting with the reset default
The PAD_CTL SPEED settings 0x1 and 0x2 both designate 'Medium
Speed'. The PAD_CTL register HW reset default value is '0x2' for
most pads, so use this value for the PAD_CTL_SPEED_MED definition.
This partially reverts commit 9b2cc7dbfd46 ("imx: mx6 add
PAD_CTL_SPEED_LOW for i.MX6SX/UL") which inadvertently changed the
definition from '2' to '1'.
karo: tx6: prevent DTB from either being out of reach of kernel or overwritten during uncompress
The current setting of fdtaddr and fdt_high has proven to be
inappropriate in that either the FDT may be out of reach of the
kernel or may be overwritten by the uncompressing Linux kernel.
Set fdt_high to an offset of 256MiB from SDRAM start, so that it is
valid for any board regardless of memory size while preventing the
described problems.
Lothar Waßmann [Fri, 23 Dec 2016 11:56:32 +0000 (12:56 +0100)]
karo: tx6: support MIPI variant in board name
The TX6Q-1230 is physically the same as TX6Q-1030 with the
distinction, that the MIPI interface is used rather than the LCD
interface. This is only a cosmetic change to adjust the displayed
board name.
Lothar Waßmann [Thu, 30 Jun 2016 13:40:18 +0000 (15:40 +0200)]
mxs_gpio: correctly use the GPIO API
The GPIO API expects a linear GPIO number as parameter to the gpio_*()
functions. The current implementation of the mxs_gpio driver operates on
iomux_cfg_t cookies instead. Therefore the 'gpio' command cannot be
used with this driver.
Change the driver to implement the correct API and introduce some
checks to catch users that still use the old semantics.
1. assert the most sigificant bit in the iomux_cfg_t pad definitions,
so that using such a cookie in place of a GPIO number will
decisively generate an invalid GPIO number and flag an error at runtime.
2. introduce a compile switch CONFIG_MXS_IOMUX_COMPILE_CHECK to make
the iomux_cfg_t cookie a 64 bit variable, so that passing an
iomux_cfg_t value to a gpio_*() function will generate a compile
time error.
Lothar Waßmann [Wed, 29 Jun 2016 09:06:58 +0000 (11:06 +0200)]
fs/fs.c: correctly interpret the '(max)len' parameter to fs_read()
The 'len' parameter passed to fs_read() actually denotes the maximum
number of bytes that fit into the callers buffer, not an expected
amount of data to be read.
Rename the parameter accordingly and honor the maxlen requested by the
caller appropriately.
Also remove the bogus warning message printed when the number of bytes
read is smaller than maxlen.
Lothar Waßmann [Wed, 29 Jun 2016 08:46:49 +0000 (10:46 +0200)]
common/cmd_misc.c: fix return code of sleep command
-1 is equivalent to CMD_RET_USAGE and makes the sleep command print
its usage information when aborted by <CTRL-C> which is most probably
not intended.
The I2C access to the PMIC requires the TAMPER pins of the i.MX6UL to
be useable as GPIOs. This is only possible after the TAMPER_PIN_DISABLE
fuses are programmed which is usually done via U-Boot.
Resolve this catch 22 situation by disabling the PMIC in the '_noenv'
U-Boot variant which is usually used in the manufacturing
environment.
karo: tx6: set LCD x, y dimensions to 0 when disabling LCD
Even when the LCD is disabled, the LCD framework will still clear the
video memory. This can take a cosiderable amount of time for the
maximum resolution of 16MiB that the i.MX6 supports.
Setting vl_row and vl_col to 0 results in a zero sized framebuffer
to avoid this unnecessary delay.
Lothar Waßmann [Thu, 18 Feb 2016 17:30:19 +0000 (18:30 +0100)]
karo: tx6ul: defer mmc probing until environment has been loaded
Check the 'baseboard' environment variable before initializing the MMC
interface to prevent error messages on TX6UL-Mainboard which doesn't
support MMC mass storage.
projects / karo-tx-uboot.git / log