Hi, 2013/1/8 Ulf Hansson <ulf.hans...@linaro.org>: > On 8 January 2013 15:05, Johan Rudholm <johan.rudh...@stericsson.com> wrote: >> This patch series attempts to make the 1.8V signal voltage switch >> required for UHS mode work according to the SD specification. >> >> These patches have been tested with a couple of UHS SD cards, one of >> which sometimes requires up to five power cycles before it accepts the >> signal voltage switch. The patches have also been tested with various >> other SD cards, as well as one SDIO WLAN chip (cw1200) to check >> for regressions. The patches have also been tested with >> CONFIG_MMC_CLKGATE. >> >> As usual, I'd be very grateful if someone could help me test this patch >> with an UHS SDIO card and perhaps also a combo card (which does seem to >> be rare these days?)? >> >> This patch series is based on previous RFC/patch: >> >> [RFC/PATCH v2] mmc: core: Fixup signal voltage switch >> >> and more recently on Kevin Liu's patches: >> >> [PATCH v2 1/3] mmc: core: enhance the code for signal voltage setting >> [PATCH v2 2/3] mmc: core: cycle power the card in voltage switch rather than >> mmc_sd_get_cid >> >> Changelog: >> v4 -> v5 >> - Reset signal_voltage in struct ios if switch fails >> v3 -> v4 >> - Added "mmc: core: Break out start_signal_voltage_switch", >> which divides up mmc_set_signal_voltage to avoid a recursive >> call from mmc_power_up. This removed the third argument >> (cmd11) of the function >> - Minor bug fixes >> v2 -> v3 >> - Minor bug fixes >> v1 -> v2 >> - Move mmc_power_cycle to the mmc_set_signal_voltage function >> - Check card_busy before switching voltages >> - Return -EPERM if signal voltage switch with cmd11 is >> requested, but no start_signal_voltage_switch is defined. >> - If we're switching back to 3.3 V, just do the switch without >> checking card_busy etc >> v2 -> This patch series >> - Removed the extra argument to the card_busy host_ops function >> - Added mmc_power_cycle >> - Some clarifying comments >> v1 -> v2 >> - Removed reset of signal voltage in mmc_sd_get_cid, since >> "mmc: core: reset signal voltage on power up" >> previous two patches -> v1: >> - Keep calls to mmc_host_clk_hold / mmc_host_clk_release >> - Add retry-loop / power cycle in sdio.c >> - Fall back to 3.3 V if the switch repeatedly fails >> - Add an extra argument to the card_busy host_ops function, >> which can be used to signal polling use of the function >> >> Johan Rudholm (4): >> mmc: core: Add mmc_power_cycle >> mmc: core: Add card_busy to host_ops >> mmc: core: Break out start_signal_voltage_switch >> mmc: core: Fixup signal voltage switch >> >> drivers/mmc/core/core.c | 114 >> +++++++++++++++++++++++++++++++++++++++------- >> drivers/mmc/core/core.h | 5 +- >> drivers/mmc/core/mmc.c | 8 ++-- >> drivers/mmc/core/sd.c | 23 +++++++--- >> drivers/mmc/core/sdio.c | 23 ++++++++-- >> include/linux/mmc/host.h | 3 ++ >> 6 files changed, 144 insertions(+), 32 deletions(-) >> >> -- >> 1.7.10 >> > > For those patches in this patchset that does not already have my signoff-by; > > Acked-by: Ulf Hansson <ulf.hans...@linaro.org>
Also, since Wei very kindly agreed to test the patch set with the rtsx driver: Tested-by: Wei WANG <wei_w...@realsil.com.cn> Kind regards, Johan -- 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
