redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

ARM i.MX51: setup MIPI during startup

Browse source 
The MIPI interface has to be initialized for proper IPU support.
The MIPI officially is not supported, but still needs initialization.
This patch adds this to the SoC startup as all it does is poking
some magic values into registers for which we do not have documentation.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Sascha Hauer 2012-11-12 15:39:55 +01:00
parent 376aaac183
commit a4dfccf8a8
1 changed files with 20 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
arch/arm/mach-imx/mm-imx5.c
View file

@ -81,8 +81,28 @@ void __init imx50_init_early(void)
mxc_arch_reset_init(MX50_IO_ADDRESS(MX50_WDOG_BASE_ADDR));
}
/*
* The MIPI HSC unit has been removed from the i.MX51 Reference Manual by
* the Freescale marketing division. However this did not remove the
* hardware from the chip which still needs to be configured for proper
* IPU support.
*/
static void __init imx51_ipu_mipi_setup(void)
{
void __iomem *hsc_addr;
hsc_addr = MX51_IO_ADDRESS(MX51_MIPI_HSC_BASE_ADDR);
/* setup MIPI module to legacy mode */
__raw_writel(0xf00, hsc_addr);
/* CSI mode: reserved; DI control mode: legacy (from Freescale BSP) */
__raw_writel(__raw_readl(hsc_addr + 0x800) | 0x30ff,
hsc_addr + 0x800);
}
void __init imx51_init_early(void)
{
imx51_ipu_mipi_setup();
mxc_set_cpu_type(MXC_CPU_MX51);
mxc_iomux_v3_init(MX51_IO_ADDRESS(MX51_IOMUXC_BASE_ADDR));
mxc_arch_reset_init(MX51_IO_ADDRESS(MX51_WDOG1_BASE_ADDR));