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charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220705001814epcas1p40a4eadbf8429f01a98bdb56f00ba3310 References: <20220705005035.14195-1-sh043.lee@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Seunghui Lee > Sent: Tuesday, July 5, 2022 9:51 AM > To: ulf.hansson=40linaro.org; u.kleine-koenig=40pengutronix.de; > gregkh=40linuxfoundation.org; linux=40dominikbrodowski.net; > alexandre.belloni=40bootlin.com; linux-mmc=40vger.kernel.org; linux- > kernel=40vger.kernel.org > Cc: grant.jung=40samsung.com; jt77.jang=40samsung.com; > dh0421.hwang=40samsung.com; junwoo80.lee=40samsung.com; jangsub.yi=40sams= ung.com; > cw9316.lee=40samsung.com; sh8267.baek=40samsung.com; wkon.kim=40samsung.c= om; > seunghwan.hyun=40samsung.com; Seunghui Lee > Subject: =5BPATCH=5D mmc: print clock frequency with recognization >=20 > It's easy to figure out how fast frequency it has from the log. > e.g. mmc0: new ultra high speed SDR104 SDXC card at address aaaa(clk > 202000000) >=20 > Signed-off-by: Seunghui Lee > --- > drivers/mmc/core/bus.c =7C 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) >=20 > diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index > 58a60afa650b..3623cc27a61c 100644 > --- a/drivers/mmc/core/bus.c > +++ b/drivers/mmc/core/bus.c > =40=40 -348,7 +348,7 =40=40 int mmc_add_card(struct mmc_card *card) > mmc_card_ddr52(card) ? =22DDR =22 : =22=22, > type); > =7D else =7B > - pr_info(=22%s: new %s%s%s%s%s%s card at address %04x=5Cn=22, > + pr_info(=22%s: new %s%s%s%s%s%s card at > address %04x(clk %u)=5Cn=22, > mmc_hostname(card->host), > mmc_card_uhs(card) ? =22ultra high speed =22 : > (mmc_card_hs(card) ? =22high speed =22 : =22=22), =40=40 -356,7 > +356,8 =40=40 int mmc_add_card(struct mmc_card *card) > (mmc_card_hs200(card) ? =22HS200 =22 : =22=22), > mmc_card_hs400es(card) ? =22Enhanced strobe =22 : =22=22, > mmc_card_ddr52(card) ? =22DDR =22 : =22=22, > - uhs_bus_speed_mode, type, card->rca); > + uhs_bus_speed_mode, type, card->rca, > + card->host->ios.clock); > =7D >=20 > =23ifdef CONFIG_DEBUG_FS > -- > 2.29.0 Please give me any opinion or suggestion about this commit. Normally, the SD card's bus speed depends on both host controller and inter= nal PLL. There are lots of host controller vendor in the market as well. So, we can guess the exact clock speed from this commit.