Hi Joel, On 03/13/2014 03:35 PM, Joel Fernandes wrote:
We introduce functions to initialize clocksource and clockevent, use CLOCKSOURCE_OF_DECLARE to declare the clocksource, and handle the clocksource selection on a per-SoC basis (Currently only AM335x is supported). Powering up of the timer will be done with the help of the mach-omap layer function that's introduced earlier in the series. We make a local copy of dmtimer API for use by clocksource, the original dmtimer API in plat-omap is kept as-is till the migration of all SoCs is completed after which it can't be deleted. Signed-off-by: Joel Fernandes <joelf@xxxxxx> --- drivers/clocksource/Makefile | 1 + drivers/clocksource/omap-timer.c | 1157 ++++++++++++++++++++++++++++++++++++++ drivers/clocksource/omap-timer.h | 422 ++++++++++++++ 3 files changed, 1580 insertions(+) create mode 100644 drivers/clocksource/omap-timer.c create mode 100644 drivers/clocksource/omap-timer.h diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index c7ca50a..2ffe698 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -37,3 +37,4 @@ obj-$(CONFIG_ARM_ARCH_TIMER) += arm_arch_timer.o obj-$(CONFIG_ARM_GLOBAL_TIMER) += arm_global_timer.o obj-$(CONFIG_CLKSRC_METAG_GENERIC) += metag_generic.o obj-$(CONFIG_ARCH_HAS_TICK_BROADCAST) += dummy_timer.o +obj-y += omap-timer.o diff --git a/drivers/clocksource/omap-timer.c b/drivers/clocksource/omap-timer.c new file mode 100644 index 0000000..91593d8 --- /dev/null +++ b/drivers/clocksource/omap-timer.c @@ -0,0 +1,1157 @@ +/* + * drivers/clocksource/omap-timer.c + * + * OMAP Dual-Mode Timers + * + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ + * Joel Fernandes <joelf@xxxxxx> + * Tarun Kanti DebBarma <tarun.kanti@xxxxxx> + * Thara Gopinath <thara@xxxxxx> + * + * dmtimer adaptation to platform_driver. + * + * Copyright (C) 2005 Nokia Corporation + * OMAP2 support by Juha Yrjola + * API improvements and OMAP2 clock framework support by Timo Teras + * + * Copyright (C) 2014 Texas Instruments + * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@xxxxxx> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/init.h> +#include <linux/time.h> +#include <linux/interrupt.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/irq.h> +#include <linux/clocksource.h> +#include <linux/clockchips.h> +#include <linux/slab.h> +#include <linux/sched_clock.h> + +#include <linux/clk.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> + +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/platform_data/dmtimer-omap.h> +#include "omap-timer.h" +/* + * TODO: OMAP1 support removed due to need for header mach/hardware.h + * OMAP2 support may be broken due to lack of cpu_is stuff, see omap_dm_timer_get_errata + */ + +/** + * omap_dm_timer_get_errata - get errata flags for a timer + * + * Get the timer errata flags that are specific to the OMAP device being used. + */ +static u32 __init omap_dm_timer_get_errata(void) +{ + /* ifdef'd out due to lack of availaibility of soc.h */ +#if 0 + if (cpu_is_omap24xx()) + return 0;
You should be able to fix this using some compatible checks. regards Suman
+#endif + return OMAP_TIMER_ERRATA_I103_I767; +} + +
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