{"id":2196302,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2196302/?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":"<20260213-i2c-mux-v5-4-fb2cbf9979b3@gmail.com>","date":"2026-02-13T11:06:53","name":"[v5,4/5] i2c: davinci: add support for setting bus frequency","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"95ccb7814203b334a3ba800b9141ad8e30ae796a","submitter":{"id":46679,"url":"http://patchwork.ozlabs.org/api/1.0/people/46679/?format=json","name":"Marcus Folkesson","email":"marcus.folkesson@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-i2c/patch/20260213-i2c-mux-v5-4-fb2cbf9979b3@gmail.com/mbox/","series":[{"id":492083,"url":"http://patchwork.ozlabs.org/api/1.0/series/492083/?format=json","date":"2026-02-13T11:06:52","name":"I2C Mux per channel bus speed","version":5,"mbox":"http://patchwork.ozlabs.org/series/492083/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2196302/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=mMvY96JU;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=104.64.211.4; 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charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20260213-i2c-mux-v5-4-fb2cbf9979b3@gmail.com>","References":"<20260213-i2c-mux-v5-0-fb2cbf9979b3@gmail.com>","In-Reply-To":"<20260213-i2c-mux-v5-0-fb2cbf9979b3@gmail.com>","To":"Wolfram Sang ,\n Peter Rosin ,\n Michael Hennerich ,\n Bartosz Golaszewski , Andi Shyti ,\n Bartosz Golaszewski ","Cc":"linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,\n linux-arm-kernel@lists.infradead.org,\n Marcus Folkesson ,\n Bartosz Golaszewski ","X-Mailer":"b4 0.14.3","X-Developer-Signature":"v=1; a=openpgp-sha256; l=1624;\n i=marcus.folkesson@gmail.com; h=from:subject:message-id;\n bh=32tpqgfedy/sxp2AZTtYj6G+OqEGB6zW9YyBBWylfYU=;\n b=owEBbQKS/ZANAwAKAYiATm9ZXVIyAcsmYgBpjwYQjYtkmVzixam7zJlmI7LwWiVJSUQa8NVod\n MxK9pUbs/OJAjMEAAEKAB0WIQQFUaLotmy1TWTBLGWIgE5vWV1SMgUCaY8GEAAKCRCIgE5vWV1S\n MjL0EAC9rAgMMCWzcShokvBpBcCZucXuh3KlCmPqH5ZUGe3a8fLC2Y92u5hFvUeaoBpLmTLGP0l\n m93yekpOYZ5TdQSFzfnrikfz5HU3kG7n9J8UROVxIJksRZL5UUU3HgpObeJgxMoDPCvISmpgalJ\n jefFt/X3XOHJ3Axq4xHaH6B7IBvbYYu3KHIF7UWfDRmXeROBw8+oOqVcddBE1SCa/C4NUFTXpuL\n MWs1PUaG6BDi0vdGsBtEVMbsGRVKDYlKWgehq4AxBKzfc75WiI79nvwXOWlna8VnzBG6cQoDtGI\n dSYKb1l35lkZg0obmYBp0SDoiVKm9nT8JjteMoZl3r1q9mBrQB4496aCXtIZ7Dppc7S/d/JFXNh\n HcuYPMXPQ5zgAbsJmrQlm6LQ2U+94wLvMZMtoPWHVznvxvoVgTnX6xqEfTuJ1S6iluX92ACblGN\n 560bD4rPEf2D/hRKNmM8JRKNAxGrVcueMfJ27beq/HMwddNkpGd0C2i6iJmv0gp+I1b2tuAEErq\n pccgokdH9wtCL8+lmwUBRGSKy5zOSt8iB/VgcTnQ3SbsYCX8MlhTjwZ+W3wYvC/oNi2oIZFOR5A\n 23rYZ14sUuuD4cu5iMX99Wfops3pVytNSxnKQBMdro8CQ+OXAStSax5Gf34RbAcJs7bVVPe1zDP\n 7oNl6E/1JN8+nNA==","X-Developer-Key":"i=marcus.folkesson@gmail.com; a=openpgp;\n fpr=AB91D46C7E0F6E6FB2AB640EC0FE25D598F6C127"},"content":"Populate adapter with clock_hz and set_clk_freq to enable support for\ndynamic bus frequency.\n\nAcked-by: Bartosz Golaszewski \nSigned-off-by: Marcus Folkesson \n---\n drivers/i2c/busses/i2c-davinci.c | 23 +++++++++++++++++++++++\n 1 file changed, 23 insertions(+)","diff":"diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c\nindex 761de5a814df..3daa823dcb9e 100644\n--- a/drivers/i2c/busses/i2c-davinci.c\n+++ b/drivers/i2c/busses/i2c-davinci.c\n@@ -279,6 +279,27 @@ static int i2c_davinci_init(struct davinci_i2c_dev *dev)\n \treturn 0;\n }\n \n+static int davinci_i2c_set_clk(struct i2c_adapter *adap, u32 clock_hz)\n+{\n+\tstruct davinci_i2c_dev *dev = i2c_get_adapdata(adap);\n+\n+\tif (dev->bus_freq_hz == clock_hz)\n+\t\treturn 0;\n+\n+\tdev->bus_freq_hz = clock_hz;\n+\n+\t/* put I2C into reset */\n+\tdavinci_i2c_reset_ctrl(dev, 0);\n+\n+\t/* compute clock dividers */\n+\ti2c_davinci_calc_clk_dividers(dev);\n+\n+\t/* Take the I2C module out of reset: */\n+\tdavinci_i2c_reset_ctrl(dev, 1);\n+\n+\treturn 0;\n+}\n+\n /*\n * This routine does i2c bus recovery by using i2c_generic_scl_recovery\n * which is provided by I2C Bus recovery infrastructure.\n@@ -809,6 +830,8 @@ static int davinci_i2c_probe(struct platform_device *pdev)\n \tadap->dev.parent = &pdev->dev;\n \tadap->timeout = DAVINCI_I2C_TIMEOUT;\n \tadap->dev.of_node = dev_of_node(&pdev->dev);\n+\tadap->clock_hz = dev->bus_freq_hz;\n+\tadap->set_clk_freq = davinci_i2c_set_clk;\n \n \tif (dev->has_pfunc)\n \t\tadap->bus_recovery_info = &davinci_i2c_scl_recovery_info;\n","prefixes":["v5","4/5"]}