On 08/09/2011 07:55 AM, Robin Holt wrote: > I added a clock source for the p1010rdb so the flexcan driver > could find its clock frequency. > > 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, > Cc: PPC list <linuxppc-dev@lists.ozlabs.org>
After fixing Wolfgangs remarks add by Acked-by, for what it's worth in the ppc-world :) Some nitpicking from me :) - Darn you send another patch. This comments still apply. > > --- > > Could I also get a ruling on the Kconfig language. I could do it either > with the 85xx_HAVE_CAN_FLEXCAN in or out of the Kconfig file. It felt > like the right thing to do was without, but the arm Kconfig files do > it this way and a patch from freescale had something similar so I went > this route. > > arch/powerpc/platforms/85xx/Kconfig | 6 +++ > arch/powerpc/platforms/85xx/Makefile | 1 + > arch/powerpc/platforms/85xx/clock.c | 59 > ++++++++++++++++++++++++++++++++ > arch/powerpc/platforms/85xx/p1010rdb.c | 8 ++++ > 4 files changed, 74 insertions(+), 0 deletions(-) > create mode 100644 arch/powerpc/platforms/85xx/clock.c > > diff --git a/arch/powerpc/platforms/85xx/Kconfig > b/arch/powerpc/platforms/85xx/Kconfig > index 498534c..ed4cf92 100644 > --- a/arch/powerpc/platforms/85xx/Kconfig > +++ b/arch/powerpc/platforms/85xx/Kconfig > @@ -26,6 +26,10 @@ config MPC8560_ADS > help > This option enables support for the MPC 8560 ADS board > > +config 85xx_HAVE_CAN_FLEXCAN > + bool > + select HAVE_CAN_FLEXCAN if NET && CAN > + > config MPC85xx_CDS > bool "Freescale MPC85xx CDS" > select DEFAULT_UIMAGE > @@ -70,6 +74,8 @@ config MPC85xx_RDB > config P1010_RDB > bool "Freescale P1010RDB" > select DEFAULT_UIMAGE > + select 85xx_HAVE_CAN_FLEXCAN > + select PPC_CLOCK if CAN_FLEXCAN > help > This option enables support for the MPC85xx RDB (P1010 RDB) board > > diff --git a/arch/powerpc/platforms/85xx/Makefile > b/arch/powerpc/platforms/85xx/Makefile > index a971b32..64ad7a4 100644 > --- a/arch/powerpc/platforms/85xx/Makefile > +++ b/arch/powerpc/platforms/85xx/Makefile > @@ -11,6 +11,7 @@ obj-$(CONFIG_MPC85xx_DS) += mpc85xx_ds.o > obj-$(CONFIG_MPC85xx_MDS) += mpc85xx_mds.o > obj-$(CONFIG_MPC85xx_RDB) += mpc85xx_rdb.o > obj-$(CONFIG_P1010_RDB) += p1010rdb.o > +obj-$(CONFIG_PPC_CLOCK) += clock.o > obj-$(CONFIG_P1022_DS) += p1022_ds.o > obj-$(CONFIG_P1023_RDS) += p1023_rds.o > obj-$(CONFIG_P2040_RDB) += p2040_rdb.o corenet_ds.o > diff --git a/arch/powerpc/platforms/85xx/clock.c > b/arch/powerpc/platforms/85xx/clock.c > new file mode 100644 > index 0000000..a25cbf3 > --- /dev/null > +++ b/arch/powerpc/platforms/85xx/clock.c > @@ -0,0 +1,59 @@ Please add your copyright notice and add a license, e.g. "This file is released under GPLv2" > + > +#include <linux/device.h> > +#include <linux/err.h> > + > +#include <asm/clk_interface.h> > + > +#include <sysdev/fsl_soc.h> > + > +/* > + * p1010rdb needs to provide a clock source for the flexcan driver. > + */ > +struct clk { > + unsigned long rate; > +} p1010_rdb_system_clock; > + > +static struct clk *p1010_rdb_clk_get(struct device *dev, const char *id) > +{ > + 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); > + > + return &p1010_rdb_system_clock; > +} > + > +static void p1010_rdb_clk_put(struct clk *clk) > +{ > + return; > +} > + > +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, no indention here please, just one space before the "=". YMMV > +}; > + > +void __init p1010_rdb_clk_init(void) > +{ > + p1010_rdb_system_clock.rate = fsl_get_sys_freq(); > + clk_functions = p1010_rdb_clk_functions; > +} > + > diff --git a/arch/powerpc/platforms/85xx/p1010rdb.c > b/arch/powerpc/platforms/85xx/p1010rdb.c > index d7387fa..29e04d6 100644 > --- a/arch/powerpc/platforms/85xx/p1010rdb.c > +++ b/arch/powerpc/platforms/85xx/p1010rdb.c > @@ -81,6 +81,13 @@ static void __init p1010_rdb_setup_arch(void) > printk(KERN_INFO "P1010 RDB board from Freescale Semiconductor\n"); > } > > +static void __init p1010_rdb_init(void) > +{ > +#ifdef PPC_CLOCK > + p1010_rdb_clk_init(); > +#endif > +} > + > static struct of_device_id __initdata p1010rdb_ids[] = { > { .type = "soc", }, > { .compatible = "soc", }, > @@ -111,6 +118,7 @@ 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, cheers, 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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