The GW551x-A revision does not have the CSI0_DATA_EN pin connected, therefore we need to make sure that signal is not muxed to the CSI_DATA_EN signal internally and do so by steering it to the unused GPIO5_IO20.
We do this so that the kernel device-tree can properly define the signal for RevB and beyond boards that do have this hooked up properly and require it.
Signed-off-by: Tim Harvey tharvey@gateworks.com --- board/gateworks/gw_ventana/gw_ventana.c | 35 +++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+)
diff --git a/board/gateworks/gw_ventana/gw_ventana.c b/board/gateworks/gw_ventana/gw_ventana.c index 307ffa5..068c726 100644 --- a/board/gateworks/gw_ventana/gw_ventana.c +++ b/board/gateworks/gw_ventana/gw_ventana.c @@ -1610,6 +1610,41 @@ int ft_board_setup(void *blob, bd_t *bd) }
/* + * isolate CSI0_DATA_EN for GW551x below revB to work around + * errata causing non functional digital video in (it is not hooked up) + */ + else if (board_type == GW551x && rev == 'A') { + u32 *range = NULL; + int len; + const u32 *handle = NULL; + + i = fdt_node_offset_by_compatible(blob, -1, + "fsl,imx-tda1997x-video"); + if (i) + handle = fdt_getprop(blob, i, "pinctrl-0", NULL); + if (handle) + i = fdt_node_offset_by_phandle(blob, + fdt32_to_cpu(*handle)); + if (i) + range = (u32 *)fdt_getprop(blob, i, "fsl,pins", &len); + if (range) { + len /= sizeof(u32); + for (i = 0; i < len; i += 6) { + u32 mux_reg = fdt32_to_cpu(range[i+0]); + u32 conf_reg = fdt32_to_cpu(range[i+1]); + /* mux PAD_CSI0_DATA_EN to GPIO */ + if (is_cpu_type(MXC_CPU_MX6Q) && + mux_reg == 0x260 && conf_reg == 0x630) + range[i+3] = cpu_to_fdt32(0x5); + else if (!is_cpu_type(MXC_CPU_MX6Q) && + mux_reg == 0x08c && conf_reg == 0x3a0) + range[i+3] = cpu_to_fdt32(0x5); + } + fdt_setprop_inplace(blob, i, "fsl,pins", range, len); + } + } + + /* * Peripheral Config: * remove nodes by alias path if EEPROM config tells us the * peripheral is not loaded on the board.