> -----Original Message----- > From: kishore kadiyala [mailto:kishorek.kadiyala@xxxxxxxxx] > Sent: Thursday, August 05, 2010 11:04 AM > To: Madhusudhan > Cc: Andrew Morton; linux-mmc@xxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx; > tony@xxxxxxxxxxx; adrian.hunter@xxxxxxxxx > Subject: Re: [PATCH v6] OMAP4 HSMMC: Adding Card detect support for MMC1 > on OMAP4 > > Madhu, > > On Thu, Aug 5, 2010 at 4:26 AM, Madhusudhan <madhu.cr@xxxxxx> wrote: > > <snip> > > > >> >> > arch/arm/mach-omap2/board-4430sdp.c | 7 +++- > >> >> > drivers/mfd/twl6030-irq.c | 76 > >> >> +++++++++++++++++++++++++++++++++++ > >> >> > drivers/mmc/host/omap_hsmmc.c | 4 +- > >> >> > include/linux/i2c/twl.h | 16 +++++++ > >> >> > 4 files changed, 100 insertions(+), 3 deletions(-) > >> >> > > >> >> > diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach- > >> >> omap2/board-4430sdp.c > >> >> > index f287461..388b96d 100644 > >> >> > --- a/arch/arm/mach-omap2/board-4430sdp.c > >> >> > +++ b/arch/arm/mach-omap2/board-4430sdp.c > >> >> > @@ -227,9 +227,14 @@ static int > omap4_twl6030_hsmmc_late_init(struct > >> >> device *dev) > >> >> > struct omap_mmc_platform_data *pdata = dev->platform_data; > >> >> > > >> >> > /* Setting MMC1 Card detect Irq */ > >> >> > - if (pdev->id == 0) > >> >> > + if (pdev->id == 0) { > >> >> > + ret = twl6030_mmc_card_detect_config(); > >> >> > + if (ret) > >> >> > + pr_err("Failed configuring MMC1 card > >> detect\n"); > >> >> > pdata->slots[0].card_detect_irq = TWL6030_IRQ_BASE > + > >> >> > > MMCDETECT_INTR_OFFSET; > >> >> > + pdata->slots[0].card_detect = > >> twl6030_mmc_card_detect; > > > > You are assigning an exported fn here. > > > > What if somebody disables CONFIG_TWL4030_CORE in the > omap_4430sdp_defconfig > > file? Does the driver behave nicely with only loosing the hotplug > > capability? > > On mainline 2.6.35 omap3_defconfig works for OMAP4 but without hotplug > functionality > Disabling CONFIG_TWL4030_CORE in defconfig means disabling > regulator's and eventually > on bootup mmc host drivers probe fails as omap_hsmmc_reg_get( ) > fails. Seems like > MMC and TWL are tightly coupled because of LDO dependency. > > With this V6 patch and omap3_defconfig , disabling CONFIG_TWL4030_CORE > [also need to disable USB & comment board-devkit8000.c in > mach-omap2/Makefile as they have dependency on > twl_i2c_write_u8/twl_i2c_read_u8 defined in twl-core.c] doesn't > compile due to undefined reference to those exported functions > twl6030_mmc_card_detect_config & twl6030_mmc_card_detect . > > Having below one[in twl.h] in addition to V6 : > > /* Card detect Configuration for MMC1 Controller on OMAP4 */ > +#if defined(CONFIG_TWL4030_CORE) > int twl6030_mmc_card_detect_config(void); > +#else > +static inline int twl6030_mmc_card_detect_config(void) > +{ > + pr_err("twl6030_mmc_card_detect_config not supported\n"); > + return 0; > +} > +#endif > > /* MMC1 Controller on OMAP4 uses Phoenix irq for Card detect */ > +#if defined(CONFIG_TWL4030_CORE) > int twl6030_mmc_card_detect(struct device *dev, int slot); > - > +#else > +static inline int twl6030_mmc_card_detect(struct device *dev, int slot) > +{ > + pr_err("Call back twl6030_mmc_card_detect not supported\n"); > + return -EIO; > +} > +#endif > > With the above change compilation as well as booting goes well but mmc > probe > fails. > > Shall I go with above changes and post V7 ? > Yes. In my opinion this is better than V6. Regards, Madhu > <snip> > > Thanks , > Kishore -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
