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media: imx: imx-mipi-csis: Add version register

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Register at offset 0x00 isn't documented, but the NXP BSP
imx8-mipi-csi2-sam driver defines it as a version register. Tests on
i.MX7D and i.MX8MP have confirmed this, with values matching the version
of the IP core specified in the respective reference manuals.

This commit doesn't make use of the version register at runtime as the
compatible strings are enough to identify the IP core version.
Nonetheless, capturing the information in register definitions that
don't affect the code negatively is useful for future development.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Laurent Pinchart 2021-04-07 23:54:07 +01:00 committed by Mauro Carvalho Chehab
parent 0edd95f25e
commit a1c046d322
1 changed files with 5 additions and 0 deletions
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5
drivers/media/platform/nxp/imx-mipi-csis.c
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@ -46,6 +46,11 @@
/* Register map definition */
/* CSIS version */
#define MIPI_CSIS_VERSION 0x00
#define MIPI_CSIS_VERSION_IMX7D 0x03030505
#define MIPI_CSIS_VERSION_IMX8MP 0x03060301
/* CSIS common control */
#define MIPI_CSIS_CMN_CTRL 0x04
#define MIPI_CSIS_CMN_CTRL_UPDATE_SHADOW BIT(16)