| Message ID | 20171214130941.26666-1-kishon@ti.com |
|---|---|
| Headers | show |
| Series | mmc: sdhci-omap: Add UHS/HS200 mode support | expand |
Kishon, On Thu, Dec 14, 2017 at 2:09 PM, Kishon Vijay Abraham I <kishon@ti.com> wrote: > DRA74x EVM Rev H EVM comes with revision 2.0 silicon. However, earlier > versions of EVM can come with either revision 1.1 or revision 1.0 of > silicon. > > The device-tree file is written to support rev 2.0 of silicon. > pdata-quirks are used to then override the settings needed for > PG 1.1 silicon. > > PG 1.1 silicon has limitations w.r.t frequencies at which MMC1/2/3 > can operate as well as different IOdelay numbers. > > Add support in sdhci-omap driver to get platform data if available > (added using pdata quirks) and override the data (max-frequency and > iodelay data) obtained from device tree. > > Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> <snip> > --- /dev/null > +++ b/include/linux/platform_data/sdhci-omap.h > @@ -0,0 +1,35 @@ > +/** > + * SDHCI Controller Platform Data for TI's OMAP SoCs > + * > + * Copyright (C) 2017 Texas Instruments > + * Author: Kishon Vijay Abraham I <kishon@ti.com> > + * > + * This program is free software: you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 of > + * the License as published by the Free Software Foundation. > + * > + * 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, see <http://www.gnu.org/licenses/>. > + */ Could you use the new SPDX tags instead of this fine and long boilerplate? See Thomas doc for details [1] [1] https://lkml.org/lkml/2017/12/4/934 Thanks! PS: if you could spread the word out in your team too, this would be much welcomed! -- Cordially Philippe Ombredanne
Add UHS/HS200 mode support in sdhci-omap. The programming sequence for voltage switching, tuning is followed from AM572x TRM http://www.ti.com/lit/ug/spruhz6i/spruhz6i.pdf (Similar to all AM57x/DRA7x SoCs). The patch series also implements workaround for errata published in http://www.ti.com/lit/er/sprz429k/sprz429k.pdf. While most of this series is specific to sdhci-omap, it also patches sdhci to use software timer when the requested timeout is greater than hardware capablility. This re-uses the SW data timer already implemented in sdhci while disabling the HW timeout (so that spurious timeout is not observed). The patch for sdhci.c is based on an earlier patch that was done specific to omap_hsmmc.c (https://patchwork.kernel.org/patch/9791449/) It also includes a pdata-quirk patch since both pdata-quirks and sdhci-omap uses struct sdhci_omap_platform_data. The dt patches enabling UHS/HS200 will be follow this patch series. This series is created on git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git next Kishon Vijay Abraham I (12): mmc: sdhci-omap: Update 'power_mode' outside sdhci_omap_init_74_clocks mmc: sdhci-omap: Add card_busy host ops mmc: sdhci-omap: Add custom set_uhs_signaling sdhci_host ops mmc: sdhci-omap: Add tuning support mmc: sdhci-omap: Workaround for Errata i802 mmc: sdhci_omap: Add support to set IODELAY values mmc: sdhci_omap: Fix sdhci-omap quirks mmc: sdhci-omap: Add support to override f_max and iodelay from pdata mmc: sdhci: Use software timer when timeout greater than hardware capablility dt-bindings: sdhci-omap: Add K2G specific binding mmc: sdhci-omap: Add support for MMC/SD controller in k2g SoC ARM: OMAP2+: Use sdhci-omap specific pdata-quirks for MMC/SD on DRA74x EVM .../devicetree/bindings/mmc/sdhci-omap.txt | 2 + arch/arm/mach-omap2/pdata-quirks.c | 34 +- drivers/mmc/host/sdhci-omap.c | 446 ++++++++++++++++++++- drivers/mmc/host/sdhci.c | 41 +- drivers/mmc/host/sdhci.h | 11 + include/linux/platform_data/sdhci-omap.h | 35 ++ 6 files changed, 544 insertions(+), 25 deletions(-) create mode 100644 include/linux/platform_data/sdhci-omap.h -- 2.11.0