[PATCH 09/15] ARM: mxs: Add clock support

[Shawn Guo]

Hi Uwe,

2010/12/1 Uwe Kleine-König <u.kleine-koenig at pengutronix.de>:
> Hello Shawn,
>
> On Fri, Nov 26, 2010 at 02:49:08PM +0800, Shawn Guo wrote:
>> Add clock for MXS-based SoCs, MX23 and MX28.
>>
>> Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
>> ---
>>  arch/arm/mach-mxs/clock-mx23.c          |  521 ++++++++++++++++++++++
>>  arch/arm/mach-mxs/clock-mx28.c          |  732 +++++++++++++++++++++++++++++++
>>  arch/arm/mach-mxs/clock.c               |  201 +++++++++
>>  arch/arm/mach-mxs/include/mach/clkdev.h |    7 +
>>  arch/arm/mach-mxs/include/mach/clock.h  |   64 +++
>>  arch/arm/mach-mxs/regs-clkctrl-mx23.h   |  455 +++++++++++++++++++
>>  arch/arm/mach-mxs/regs-clkctrl-mx28.h   |  663 ++++++++++++++++++++++++++++
>>  7 files changed, 2643 insertions(+), 0 deletions(-)
>>  create mode 100644 arch/arm/mach-mxs/clock-mx23.c
>>  create mode 100644 arch/arm/mach-mxs/clock-mx28.c
>>  create mode 100644 arch/arm/mach-mxs/clock.c
>>  create mode 100644 arch/arm/mach-mxs/include/mach/clkdev.h
>>  create mode 100644 arch/arm/mach-mxs/include/mach/clock.h
>>  create mode 100644 arch/arm/mach-mxs/regs-clkctrl-mx23.h
>>  create mode 100644 arch/arm/mach-mxs/regs-clkctrl-mx28.h
>>
>> diff --git a/arch/arm/mach-mxs/clock-mx23.c b/arch/arm/mach-mxs/clock-mx23.c
>> new file mode 100644
>> index 0000000..832db0b
>> --- /dev/null
>> +++ b/arch/arm/mach-mxs/clock-mx23.c
>> @@ -0,0 +1,521 @@
>> +/*
>> + * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
>> + *
>> + * 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 program is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + * GNU General Public License for more details.
>> + *
>> + * 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.,
>> + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
>> + */
>> +
>> +#include <linux/mm.h>
>> +#include <linux/delay.h>
>> +#include <linux/clk.h>
>> +#include <linux/io.h>
>> +
>> +#include <asm/clkdev.h>
>> +#include <asm/div64.h>
>> +
>> +#include <mach/hardware.h>
>> +#include <mach/common.h>
>> +#include <mach/clock.h>
>> +
>> +#include "regs-clkctrl-mx23.h"
>> +
>> +#define CLKCTRL_BASE_ADDR    MX23_IO_ADDRESS(MX23_CLKCTRL_BASE_ADDR)
>> +#define DIGCTRL_BASE_ADDR    MX23_IO_ADDRESS(MX23_DIGCTL_BASE_ADDR)
>> +
>> +static int _raw_clk_enable(struct clk *clk)
>> +{
>> +     u32 reg;
>> +
>> +     if (clk->enable_reg) {
>> +             reg = __raw_readl(clk->enable_reg);
>> +             reg &= ~(1 << clk->enable_shift);
>> +             __raw_writel(reg, clk->enable_reg);
>> +     }
>> +
>> +     return 0;
>> +}
> Hmm, I would have used an approach that is quickly switchable to the
> generic clock stuff posted a few times here.  But probably already too
> late.  So it's up to you to decide when to switch (or if at all).
>
I suppose you are talking about the common struct clk patch from
Jeremy Kerr.  Since mxs is closely tracking mxc, I would switch mxs
only mxc is switched.

-- 
Regards,
Shawn