Hello Seungwon, OK, I will change the commit message. And I also think Alim's idea is good but need more detail about functional features of Synopsis' IP. Similar situation would be happened to Exynos4210 which is not supported by dw_mmc-exynos.c yet.
Regards, Dongjin. On Thu, Feb 21, 2013 at 7:53 PM, Seungwon Jeon <tgih....@samsung.com> wrote: > On Wednesday, February 20, 2013, Alim Akhtar wrote: >> Hi, >> >> On Tue, Feb 19, 2013 at 6:04 PM, Dongjin Kim <tobet...@gmail.com> wrote: >> > Hello Seungwon, >> > >> > Thank you for reviewing and I understand what you mean. >> > >> > I agree that Exynos5250 and Exynos4412 are not same, no idea how much >> > they are different because no Exynos5250 spec on my hand. But at least >> > I assumed that the capabilities below are supported by Exynos4412 in >> > terms of its datasheet and it does work on my end as expected. :) Also >> > I assumed it will be separated if one of both become different to add >> > more capabilities. >> > >> > MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR | >> > MMC_CAP_8_BIT_DATA | MMC_CAP_CMD23, >> > >> > Maybe my understanding or approach is wrong since I do not have the >> > information of Exynos5250. >> > And suggestion do you have? > At least, these capabilities can be shared because of common feature, not > fully same. > Dongjin, could you modify the commit message and comments of code? > > Let me introduce the functional feature of Exynos5250 and capability > extension. > I guess I'll send soon. > > Thanks, > Seungwon Jeon > >> >> Recently Guennadi Liakhovetski has done some work to centralize the >> mmc capabilities. See [1] and [2]. >> Those patches are pushed to Chris's mmc-next tree. >> Is it possible to extend [1] and [2] and add more capabilities (at >> least all known one) and let these caps being passed from DT instead? >> >> Second thought is, let the common minimum caps as a part of .caps >> field in dw_mmc-exynos.c itself and pass the extra/advance controller >> caps from DT and parse them via dw_mci_parse_dt() in dw_mmc.c itself. >> >> [1] https://patchwork.kernel.org/patch/1991851/ >> [2] https://patchwork.kernel.org/patch/2106531/ >> >> > Regards, >> > Dongjin. >> > >> > On Tue, Feb 19, 2013 at 7:19 PM, Seungwon Jeon <tgih....@samsung.com> >> > wrote: >> >> On Tuesday, February 19, 2013, Dongjin Kim wrote: >> >>> This patch adds the compatible string for MSHC controller of Exynos4412, >> >>> and >> >>> share the controller specific properties with Exynos5250 since they have >> >>> same >> >>> features. Its driver data name is changed to exynos_drv_data instead SoC >> >>> specific name. >> >> >> >> It's not actually same. >> >> Exynos4412 doesn't have forward compatibilities for Exynos5250. >> >> I agree that functionality of exynos_drv_data is common. >> >> These functions have been implemented for existing Exynos*. >> >> But in case of caps, it can't applied completely. >> >> I'm concerning about this. >> >> >> >> Thanks, >> >> Seungwon Jeon >> >>> >> >>> Cc: Jaehoon Chung <jh80.ch...@samsung.com> >> >>> Cc: Sachin Kamat <sachin.ka...@linaro.org> >> >>> Signed-off-by: Dongjin Kim <tobet...@gmail.com> >> >>> --- >> >>> drivers/mmc/host/dw_mmc-exynos.c | 12 +++++++----- >> >>> 1 file changed, 7 insertions(+), 5 deletions(-) >> >>> >> >>> diff --git a/drivers/mmc/host/dw_mmc-exynos.c >> >>> b/drivers/mmc/host/dw_mmc-exynos.c >> >>> index 4d50da6..38cd03c 100644 >> >>> --- a/drivers/mmc/host/dw_mmc-exynos.c >> >>> +++ b/drivers/mmc/host/dw_mmc-exynos.c >> >>> @@ -199,8 +199,8 @@ static int dw_mci_exynos_setup_bus(struct dw_mci >> >>> *host, >> >>> return 0; >> >>> } >> >>> >> >>> -/* Exynos5250 controller specific capabilities */ >> >>> -static unsigned long exynos5250_dwmmc_caps[4] = { >> >>> +/* Exynos4412/Exynos5250 controller specific capabilities */ >> >>> +static unsigned long exynos_dwmmc_caps[4] = { >> >>> MMC_CAP_UHS_DDR50 | MMC_CAP_1_8V_DDR | >> >>> MMC_CAP_8_BIT_DATA | MMC_CAP_CMD23, >> >>> MMC_CAP_CMD23, >> >>> @@ -208,8 +208,8 @@ static unsigned long exynos5250_dwmmc_caps[4] = { >> >>> MMC_CAP_CMD23, >> >>> }; >> >>> >> >>> -static const struct dw_mci_drv_data exynos5250_drv_data = { >> >>> - .caps = exynos5250_dwmmc_caps, >> >>> +static const struct dw_mci_drv_data exynos_drv_data = { >> >>> + .caps = exynos_dwmmc_caps, >> >>> .init = dw_mci_exynos_priv_init, >> >>> .setup_clock = dw_mci_exynos_setup_clock, >> >>> .prepare_command = dw_mci_exynos_prepare_command, >> >>> @@ -219,8 +219,10 @@ static const struct dw_mci_drv_data >> >>> exynos5250_drv_data = { >> >>> }; >> >>> >> >>> static const struct of_device_id dw_mci_exynos_match[] = { >> >>> + { .compatible = "samsung,exynos4412-dw-mshc", >> >>> + .data = &exynos_drv_data, }, >> >>> { .compatible = "samsung,exynos5250-dw-mshc", >> >>> - .data = &exynos5250_drv_data, }, >> >>> + .data = &exynos_drv_data, }, >> >>> {}, >> >>> }; >> >>> MODULE_DEVICE_TABLE(of, dw_mci_exynos_match); >> >>> -- >> >>> 1.7.10.4 >> >>> >> >>> -- >> >>> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >> >>> the body of a message to majord...@vger.kernel.org >> >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> >> > -- >> > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >> > the body of a message to majord...@vger.kernel.org >> > More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> -- >> Regards, >> Alim >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
