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[155.4.129.234]) by smtp.gmail.com with ESMTPSA id u13sm170603lfg.139.2021.04.21.03.32.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Apr 2021 03:32:04 -0700 (PDT) From: Ulf Hansson To: linux-mmc@vger.kernel.org, Ulf Hansson , Adrian Hunter Cc: Shawn Lin , Avri Altman , Masami Hiramatsu , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/4] mmc: core: Read/parse SD function extension registers Date: Wed, 21 Apr 2021 12:31:50 +0200 Message-Id: <20210421103154.169410-1-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the SD spec v4.x the SD function extension registers were introduced, together with a new set of commands (CMD48/49 and CMD58/59) to read and write to them. Moreover, in v4.x a new standard function for power management features were added, while in v6.x a new standard function for performance enhancements features were added. This series doesn't implement the complete support for any of the new power/perf features, but starts out by reading and parsing the new registers and stores the information in the struct mmc_card about what features the SD card supports. Note that, there are no HW updates need for the host to support reading/parsing of the these new SD registers. Tested with a 64GB Sandisk Extreme PRO UHS-I A2 card. Additional tests and reviews are of course greatly appreciated. Kind regards Ulf Hansson Ulf Hansson (4): mmc: core: Parse the SD SCR register for support of CMD48/49 and CMD58/59 mmc: core: Prepare mmc_send_cxd_data() to be used for CMD48 for SD cards mmc: core: Read the SD function extension registers for power management mmc: core: Read performance enhancements registers for SD cards drivers/mmc/core/mmc_ops.c | 11 +- drivers/mmc/core/mmc_ops.h | 2 + drivers/mmc/core/sd.c | 222 ++++++++++++++++++++++++++++++++++++- include/linux/mmc/card.h | 21 ++++ include/linux/mmc/sd.h | 3 + 5 files changed, 252 insertions(+), 7 deletions(-) -- 2.25.1