On Tue, Mar 31, 2009 at 2:01 PM, Wolfgang Grandegger <w...@grandegger.com>
wrote:
> The i2c node property "fsl,preserve-clocking" allows to overtake the
> clock settings from the boot loader avoiding the hard-coded settings.
>
> Signed-off-by: Wolfgang Grandegger <w...@grandegger.com>
Acked-by: Grant Likely <grant.lik...@secretlab.ca>
> ---
> Documentation/powerpc/dts-bindings/fsl/i2c.txt | 2 ++
> drivers/i2c/busses/i2c-mpc.c | 20 +++++++++++---------
> 2 files changed, 13 insertions(+), 9 deletions(-)
>
> Index: linux-2.6/drivers/i2c/busses/i2c-mpc.c
> ===================================================================
> --- linux-2.6.orig/drivers/i2c/busses/i2c-mpc.c 2009-03-31 13:25:08.000000000
> +0200
> +++ linux-2.6/drivers/i2c/busses/i2c-mpc.c 2009-03-31 21:29:21.615721143
> +0200
> @@ -323,13 +323,6 @@
> if (!i2c)
> return -ENOMEM;
>
> - if (of_get_property(op->node, "dfsrr", NULL))
> - i2c->flags |= FSL_I2C_DEV_SEPARATE_DFSRR;
> -
> - if (of_device_is_compatible(op->node, "fsl,mpc5200-i2c") ||
> - of_device_is_compatible(op->node, "mpc5200-i2c"))
> - i2c->flags |= FSL_I2C_DEV_CLOCK_5200;
> -
> init_waitqueue_head(&i2c->queue);
>
> i2c->base = of_iomap(op->node, 0);
> @@ -348,8 +341,17 @@
> goto fail_request;
> }
> }
> -
> - mpc_i2c_setclock(i2c);
> +
> + if (!of_get_property(op->node, "fsl,preserve-clocking", NULL)) {
> + if (of_get_property(op->node, "dfsrr", NULL))
> + i2c->flags |= FSL_I2C_DEV_SEPARATE_DFSRR;
> +
> + if (of_device_is_compatible(op->node, "fsl,mpc5200-i2c") ||
> + of_device_is_compatible(op->node, "mpc5200-i2c"))
> + i2c->flags |= FSL_I2C_DEV_CLOCK_5200;
> +
> + mpc_i2c_setclock(i2c);
> + }
>
> dev_set_drvdata(&op->dev, i2c);
>
> Index: linux-2.6/Documentation/powerpc/dts-bindings/fsl/i2c.txt
> ===================================================================
> --- linux-2.6.orig/Documentation/powerpc/dts-bindings/fsl/i2c.txt
> 2009-03-17 10:28:07.000000000 +0100
> +++ linux-2.6/Documentation/powerpc/dts-bindings/fsl/i2c.txt 2009-03-31
> 21:35:51.527901532 +0200
> @@ -20,6 +20,8 @@
> a digital filter sampling rate register
> - fsl5200-clocking : boolean; if defined, indicated that this device
> uses the FSL 5200 clocking mechanism.
> + - fsl,preserve-clocking : boolean; if defined, the clock settings
> + from the bootloader are preserved (not touched).
>
> Example :
> ...@3000 {
>
--
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
