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imx: ventana: added DT fixup for GW551x-A video input

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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>
This commit is contained in:
Tim Harvey 2015-04-08 12:54:53 -07:00 committed by Stefano Babic
parent 45af3f74bc
commit eeca451ace
1 changed files with 35 additions and 0 deletions
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35
board/gateworks/gw_ventana/gw_ventana.c
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@ -1609,6 +1609,41 @@ int ft_board_setup(void *blob, bd_t *bd)
fdt_status_disabled(blob, i);
}
/*
* 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