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    SubjectRe: [PATCH] pcmcia: Add support P2CCLK bit enabler for TI PC1520
    2007/12/26, Andrew Morton <akpm@linux-foundation.org>:
    > On Tue, 18 Dec 2007 18:57:24 +0900 Nobuhiro Iwamatsu <iwamatsu@nigauri.org> wrote:
    >
    > > There is a device that doesn't work when P2CCLK's bit of TI PC1520 was disable.
    > > This patch supports P2CCLK bit enabler for TI PC1520.
    > >
    > > ...
    > >
    > > config YENTA_TOSHIBA
    > > default y
    > > bool "Special initialization for Toshiba ToPIC bridges" if EMBEDDED
    > > diff --git a/drivers/pcmcia/ti113x.h b/drivers/pcmcia/ti113x.h
    > > index d29657b..ea749e8 100644
    > > --- a/drivers/pcmcia/ti113x.h
    > > +++ b/drivers/pcmcia/ti113x.h
    > > @@ -59,6 +59,7 @@
    > > #define TI122X_SCR_SER_STEP 0xc0000000
    > > #define TI122X_SCR_INTRTIE 0x20000000
    > > #define TIXX21_SCR_TIEALL 0x10000000
    > > +#define TI122X_SCR_P2CCLK 0x08000000
    > > #define TI122X_SCR_CBRSVD 0x00400000
    > > #define TI122X_SCR_MRBURSTDN 0x00008000
    > > #define TI122X_SCR_MRBURSTUP 0x00004000
    > > @@ -822,6 +823,13 @@ static int ti12xx_override(struct yenta_socket *socket)
    > > printk(KERN_INFO "Yenta: Enabling burst memory read transactions\n");
    > > val |= TI122X_SCR_MRBURSTUP;
    > > }
    > > +
    > > +#ifdef CONFIG_YENTA_TI_P2CCLK
    > > + if ( !(val & TI122X_SCR_P2CCLK)) {
    > > + printk(KERN_INFO "Yenta: Clock generated by internal oscillator\n");
    > > + val |= TI122X_SCR_P2CCLK;
    > > + }
    > > +#endif
    > > if (val_orig != val)
    > > config_writel(socket, TI113X_SYSTEM_CONTROL, val);
    >
    > It would be much better if we cold do this without the config option: just
    > detect the appropriate device and make it work.

    This bit is enable for PC in BIOS.
    However, I think that I want to control even by the kernel in
    building in because it is a boot loader situation.

    I think that this will not be able to be done by automatic.

    Please apply this patch.

    regards,
    Nobuhiro


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