On 08/06/2011 06:05 AM, Robin Holt wrote: > flexcan driver needs the clk_get, clk_get_rate, etc functions > to work. This patch provides the minimum functionality.
This patch has to go via the powerpc git tree. Added
linuxppc-dev@lists.ozlabs.org on CC.
> Signed-off-by: Robin Holt <h...@sgi.com>
> To: Marc Kleine-Budde <m...@pengutronix.de>
> To: Wolfgang Grandegger <w...@grandegger.com>
> To: U Bhaskar-B22300 <b22...@freescale.com>
> Cc: socketcan-c...@lists.berlios.de
> Cc: net...@vger.kernel.org
> ---
> arch/powerpc/platforms/85xx/p1010rdb.c | 78
> ++++++++++++++++++++++++++++++++
> 1 files changed, 78 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/platforms/85xx/p1010rdb.c
> b/arch/powerpc/platforms/85xx/p1010rdb.c
> index 3540a88..8f78ddd 100644
> --- a/arch/powerpc/platforms/85xx/p1010rdb.c
> +++ b/arch/powerpc/platforms/85xx/p1010rdb.c
> @@ -28,6 +28,7 @@
> #include <asm/udbg.h>
> #include <asm/mpic.h>
> #include <asm/swiotlb.h>
> +#include <asm/clk_interface.h>
>
> #include <sysdev/fsl_soc.h>
> #include <sysdev/fsl_pci.h>
> @@ -164,6 +165,82 @@ static void __init p1010_rdb_setup_arch(void)
> printk(KERN_INFO "P1010 RDB board from Freescale Semiconductor\n");
> }
>
> +/*
> + * p1010rdb needs to provide a clock source for the flexcan driver.
> + */
> +struct clk {
> + unsigned long rate;
> +} p1010rdb_system_clk;
> +
> +static struct clk *p1010_rdb_clk_get(struct device *dev, const char *id)
> +{
> + struct clk *clk;
> + u32 *of_property;
> + unsigned long clock_freq, clock_divider;
> + const char *dev_init_name;
> +
> + if (!dev)
> + return ERR_PTR(-ENOENT);
> +
> + /*
> + * The can devices are named ffe1c000.can0 and ffe1d000.can1 on
> + * the p1010rdb. Check for the "can" portion of that name before
> + * returning a clock source.
> + */
> + dev_init_name = dev_name(dev);
> + if (strlen(dev_init_name) != 13)
> + return ERR_PTR(-ENOENT);
> + dev_init_name += 9;
> + if (strncmp(dev_init_name, "can", 3))
> + return ERR_PTR(-ENOENT);
> +
> + of_property = (u32 *)of_get_property(dev->of_node, "clock_freq", NULL);
> + if (!of_property)
> + return ERR_PTR(-ENOENT);
> + clock_freq = *of_property;
> +
> + of_property = (u32 *)of_get_property(dev->of_node,
> + "fsl,flexcan-clock-divider", NULL);
> + if (!of_property)
> + return ERR_PTR(-ENOENT);
> + clock_divider = *of_property;
> +
> + clk = kmalloc(sizeof(struct clk), GFP_KERNEL);
> + if (!clk)
> + return ERR_PTR(-ENOMEM);
> +
> + clk->rate = DIV_ROUND_CLOSEST(clock_freq / clock_divider, 1000);
> + clk->rate *= 1000;
> +
> + return clk;
> +}
> +
> +static void p1010_rdb_clk_put(struct clk *clk)
> +{
> + kfree(clk);
> +}
> +
> +static unsigned long p1010_rdb_clk_get_rate(struct clk *clk)
> +{
> + return clk->rate;
> +}
> +
> +static struct clk_interface p1010_rdb_clk_functions = {
> + .clk_get = p1010_rdb_clk_get,
> + .clk_get_rate = p1010_rdb_clk_get_rate,
> + .clk_put = p1010_rdb_clk_put,
> +};
> +
> +static void __init p1010_rdb_clk_init(void)
> +{
> + clk_functions = p1010_rdb_clk_functions;
> +}
> +
> +static void __init p1010_rdb_init(void)
> +{
> + p1010_rdb_clk_init();
> +}
> +
> static struct of_device_id __initdata p1010rdb_ids[] = {
> { .type = "soc", },
> { .compatible = "soc", },
> @@ -195,6 +272,7 @@ define_machine(p1010_rdb) {
> .name = "P1010 RDB",
> .probe = p1010_rdb_probe,
> .setup_arch = p1010_rdb_setup_arch,
> + .init = p1010_rdb_init,
> .init_IRQ = p1010_rdb_pic_init,
> #ifdef CONFIG_PCI
> .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
Vertretung West/Dortmund | Fax: +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de |
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