{"id":816907,"url":"http://patchwork.ozlabs.org/api/patches/816907/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/patch/1506004213-22620-14-git-send-email-jjhiblot@ti.com/","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<1506004213-22620-14-git-send-email-jjhiblot@ti.com>","list_archive_url":null,"date":"2017-09-21T14:30:00","name":"[U-Boot,v2,13/26] mmc: Enable signal voltage to be selected from mmc core","commit_ref":"aff5d3c83fb8c294b3c4b97c5b6386306b47f1a0","pull_url":null,"state":"accepted","archived":false,"hash":"47a84e857fedbbc83960a0016646852aa44bc999","submitter":{"id":70508,"url":"http://patchwork.ozlabs.org/api/people/70508/?format=json","name":"Jean-Jacques Hiblot","email":"jjhiblot@ti.com"},"delegate":{"id":12423,"url":"http://patchwork.ozlabs.org/api/users/12423/?format=json","username":"Jaehoon","first_name":"Jaehoon","last_name":"Chung","email":"jh80.chung@samsung.com"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/1506004213-22620-14-git-send-email-jjhiblot@ti.com/mbox/","series":[{"id":4400,"url":"http://patchwork.ozlabs.org/api/series/4400/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/list/?series=4400","date":"2017-09-21T14:29:47","name":"mmc: Add support for HS200 and UHS modes","version":2,"mbox":"http://patchwork.ozlabs.org/series/4400/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/816907/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/816907/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; 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a=rsa-sha256; c=relaxed/simple; d=ti.com;\n\ts=ti-com-17Q1; t=1506004247;\n\tbh=+Pe0zj/9yX2c/sleIqyFyUQyVy9MoyToooyFFHZCEIk=;\n\th=From:To:CC:Subject:Date:In-Reply-To:References;\n\tb=g/wEeBMD4KjOeBCUZ+70+Dt+MtlWlhTd13pIljLAV+MaED/Rt9RojzdC2tV5WXUJi\n\t1sDclEQiSq8+sK7wIVC+p8Ma1v1pbgBnBqrQnokClswc5FuzqOKeNMFtgHG/hDcYG3\n\tAffwttUffGWvmmOgLU/Pq0DHJaz+/TSiUx54v5Lk=","From":"Jean-Jacques Hiblot ","To":", , ,\n\t","Date":"Thu, 21 Sep 2017 16:30:00 +0200","Message-ID":"<1506004213-22620-14-git-send-email-jjhiblot@ti.com>","X-Mailer":"git-send-email 1.9.1","In-Reply-To":"<1506004213-22620-1-git-send-email-jjhiblot@ti.com>","References":"<1506004213-22620-1-git-send-email-jjhiblot@ti.com>","MIME-Version":"1.0","X-EXCLAIMER-MD-CONFIG":"e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180","Cc":"u-boot@lists.denx.de","Subject":"[U-Boot] [PATCH v2 13/26] mmc: Enable signal voltage to be selected\n\tfrom mmc core","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.18","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" "},"content":"From: Kishon Vijay Abraham I \n\nAdd a new function *mmc_set_signal_voltage* in mmc core\nwhich can be used during mmc initialization to select the\nsignal voltage. Platform driver should use the set_ios\ncallback function to select the signal voltage.\n\nSigned-off-by: Kishon Vijay Abraham I \nSigned-off-by: Jean-Jacques Hiblot \n---\n drivers/mmc/mmc.c | 16 ++++++++++++++++\n include/mmc.h | 8 ++++++++\n 2 files changed, 24 insertions(+)","diff":"diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c\nindex 536cd7f..46ec5e1 100644\n--- a/drivers/mmc/mmc.c\n+++ b/drivers/mmc/mmc.c\n@@ -30,6 +30,8 @@ static const unsigned int sd_au_size[] = {\n \tSZ_16M / 512,\t(SZ_16M + SZ_8M) / 512,\tSZ_32M / 512,\tSZ_64M / 512,\n };\n \n+static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage);\n+\n #if CONFIG_IS_ENABLED(MMC_TINY)\n static struct mmc mmc_static;\n struct mmc *find_mmc_device(int dev_num)\n@@ -1257,6 +1259,12 @@ struct mode_width_tuning {\n \tuint widths;\n };\n \n+static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)\n+{\n+\tmmc->signal_voltage = signal_voltage;\n+\treturn mmc_set_ios(mmc);\n+}\n+\n static const struct mode_width_tuning sd_modes_by_pref[] = {\n \t{\n \t\t.mode = SD_HS,\n@@ -1964,6 +1972,14 @@ int mmc_start_init(struct mmc *mmc)\n \t\treturn err;\n #endif\n \tmmc->ddr_mode = 0;\n+\n+\t/* First try to set 3.3V. If it fails set to 1.8V */\n+\terr = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_330);\n+\tif (err != 0)\n+\t\terr = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_180);\n+\tif (err != 0)\n+\t\tprintf(\"failed to set signal voltage\\n\");\n+\n \tmmc_set_bus_width(mmc, 1);\n \tmmc_set_clock(mmc, 1);\n \ndiff --git a/include/mmc.h b/include/mmc.h\nindex 3e57887..e524963 100644\n--- a/include/mmc.h\n+++ b/include/mmc.h\n@@ -272,6 +272,13 @@\n #define ENHNCD_SUPPORT\t\t(0x2)\n #define PART_ENH_ATTRIB\t\t(0x1f)\n \n+enum mmc_voltage {\n+\tMMC_SIGNAL_VOLTAGE_000 = 0,\n+\tMMC_SIGNAL_VOLTAGE_120,\n+\tMMC_SIGNAL_VOLTAGE_180,\n+\tMMC_SIGNAL_VOLTAGE_330\n+};\n+\n /* Maximum block size for MMC */\n #define MMC_MAX_BLOCK_LEN\t512\n \n@@ -457,6 +464,7 @@ struct mmc {\n \tint high_capacity;\n \tuint bus_width;\n \tuint clock;\n+\tenum mmc_voltage signal_voltage;\n \tuint card_caps;\n \tuint ocr;\n \tuint dsr;\n","prefixes":["U-Boot","v2","13/26"]}