{"id":2175859,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2175859/?format=json","project":{"id":35,"url":"http://patchwork.ozlabs.org/api/1.0/projects/35/?format=json","name":"Linux I2C development","link_name":"linux-i2c","list_id":"linux-i2c.vger.kernel.org","list_email":"linux-i2c@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20251219-i2c-reset-v2-2-ad201a602e74@gmail.com>","date":"2025-12-19T07:42:21","name":"[v2,2/3] i2c: k1: add reset support","commit_ref":null,"pull_url":null,"state":"changes-requested","archived":false,"hash":"f037923951f57e7349e521b50c5b2bfd17d2dc04","submitter":{"id":92113,"url":"http://patchwork.ozlabs.org/api/1.0/people/92113/?format=json","name":"Encrow Thorne","email":"jyc0019@gmail.com"},"delegate":{"id":149066,"url":"http://patchwork.ozlabs.org/api/1.0/users/149066/?format=json","username":"cazzacarna","first_name":"Andi","last_name":"Shyti","email":"andi.shyti@kernel.org"},"mbox":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20251219-i2c-reset-v2-2-ad201a602e74@gmail.com/mbox/","series":[{"id":485959,"url":"http://patchwork.ozlabs.org/api/1.0/series/485959/?format=json","date":"2025-12-19T07:42:19","name":"i2c: spacemit: add reset support","version":2,"mbox":"http://patchwork.ozlabs.org/series/485959/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2175859/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-i2c@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20230601 header.b=EOEABHYl;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20251219-i2c-reset-v2-2-ad201a602e74@gmail.com>","References":"<20251219-i2c-reset-v2-0-ad201a602e74@gmail.com>","In-Reply-To":"<20251219-i2c-reset-v2-0-ad201a602e74@gmail.com>","To":"Troy Mitchell ,\n Andi Shyti , Rob Herring ,\n Krzysztof Kozlowski ,\n Conor Dooley , Yixun Lan ,\n Philipp Zabel , Paul Walmsley ,\n Palmer Dabbelt , Albert Ou ,\n Alexandre Ghiti ","Cc":"Troy Mitchell ,\n Guodong Xu , linux-i2c@vger.kernel.org,\n devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,\n spacemit@lists.linux.dev, linux-kernel@vger.kernel.org,\n Encrow Thorne ","X-Mailer":"b4 0.14.3","X-Developer-Signature":"v=1; a=ed25519-sha256; t=1766130147; l=1515;\n i=jyc0019@gmail.com; s=20251009; h=from:subject:message-id;\n bh=Ynzt5v58obwnhda42H/gajIJVLz4GWJg6Tg2WmflUX4=;\n b=qMfQlZSVzRGvXZdg3oEioN5Cn5Xm2J1x59daHMj1raOdC0lTKCnZqnLoQeM/xYyg7eq3aQSEi\n yhbHPR9x9ooAJ1+wCoS5U5WsMyorqPVeBT+RjAIOxX0vOoHqgDQp5hl","X-Developer-Key":"i=jyc0019@gmail.com; a=ed25519;\n pk=nnjLv04DUE0FXih6IcJUOjWFTEoo4xYQOu7m5RRHvZ4="},"content":"The K1 I2C controller provides a reset line that needs to be deasserted\nbefore the controller can be accessed.\n\nAdd reset support to the driver to ensure the controller starts in the\nrequired state.\n\nSigned-off-by: Encrow Thorne \n---\n drivers/i2c/busses/i2c-k1.c | 7 +++++++\n 1 file changed, 7 insertions(+)","diff":"diff --git a/drivers/i2c/busses/i2c-k1.c b/drivers/i2c/busses/i2c-k1.c\nindex d42c03ef5db5..23661c7ddb67 100644\n--- a/drivers/i2c/busses/i2c-k1.c\n+++ b/drivers/i2c/busses/i2c-k1.c\n@@ -10,6 +10,7 @@\n #include \n #include \n #include \n+ #include \n \n /* spacemit i2c registers */\n #define SPACEMIT_ICR\t\t 0x0\t\t/* Control register */\n@@ -534,6 +535,7 @@ static int spacemit_i2c_probe(struct platform_device *pdev)\n \tstruct device *dev = &pdev->dev;\n \tstruct device_node *of_node = pdev->dev.of_node;\n \tstruct spacemit_i2c_dev *i2c;\n+\tstruct reset_control *rst;\n \tint ret;\n \n \ti2c = devm_kzalloc(dev, sizeof(*i2c), GFP_KERNEL);\n@@ -578,6 +580,11 @@ static int spacemit_i2c_probe(struct platform_device *pdev)\n \tif (IS_ERR(clk))\n \t\treturn dev_err_probe(dev, PTR_ERR(clk), \"failed to enable bus clock\");\n \n+\trst = devm_reset_control_get_optional_exclusive_deasserted(dev, NULL);\n+\tif (IS_ERR(rst))\n+\t\treturn dev_err_probe(dev, PTR_ERR(rst),\n+\t\t\t\t \"failed to acquire deasserted reset\\n\");\n+\n \tspacemit_i2c_reset(i2c);\n \n \ti2c_set_adapdata(&i2c->adapt, i2c);\n","prefixes":["v2","2/3"]}