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GET /api/patches/2216487/?format=api
{ "id": 2216487, "url": "http://patchwork.ozlabs.org/api/patches/2216487/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-i2c/patch/20260326152656.14030-5-adilov@disroot.org/", "project": { "id": 35, "url": "http://patchwork.ozlabs.org/api/projects/35/?format=api", "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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260326152656.14030-5-adilov@disroot.org>", "list_archive_url": null, "date": "2026-03-26T15:26:52", "name": "[v5,4/8] i2c: rtl9300: introduce a property for 8 bit width reg address", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "ec81f80e985e23941404861d653037309de5cdc5", "submitter": { "id": 92795, "url": "http://patchwork.ozlabs.org/api/people/92795/?format=api", "name": "Rustam Adilov", "email": "adilov@disroot.org" }, "delegate": { "id": 149066, "url": "http://patchwork.ozlabs.org/api/users/149066/?format=api", "username": "cazzacarna", "first_name": "Andi", "last_name": "Shyti", "email": "andi.shyti@kernel.org" }, "mbox": "http://patchwork.ozlabs.org/project/linux-i2c/patch/20260326152656.14030-5-adilov@disroot.org/mbox/", "series": [ { "id": 497610, "url": "http://patchwork.ozlabs.org/api/series/497610/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-i2c/list/?series=497610", "date": "2026-03-26T15:26:49", "name": "i2c: rtl9300: support for RTL9607C I2C controller", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/497610/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216487/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216487/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-i2c+bounces-16808-incoming=patchwork.ozlabs.org@vger.kernel.org>", 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auhAOK9DqxWXymmFd31gt8y4j4RvE07/0ICztc76Tbk2RVm/JZn5qvkKagGr+hMqR4\n\t FWtvyGj4wBxvA==", "From": "Rustam Adilov <adilov@disroot.org>", "To": "Chris Packham <chris.packham@alliedtelesis.co.nz>,\n\tAndi Shyti <andi.shyti@kernel.org>,\n\tRob Herring <robh@kernel.org>,\n\tKrzysztof Kozlowski <krzk+dt@kernel.org>,\n\tConor Dooley <conor+dt@kernel.org>,\n\tlinux-i2c@vger.kernel.org,\n\tdevicetree@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org", "Cc": "Rustam Adilov <adilov@disroot.org>", "Subject": "[PATCH v5 4/8] i2c: rtl9300: introduce a property for 8 bit width reg\n address", "Date": "Thu, 26 Mar 2026 20:26:52 +0500", "Message-ID": "<20260326152656.14030-5-adilov@disroot.org>", "In-Reply-To": "<20260326152656.14030-1-adilov@disroot.org>", "References": "<20260326152656.14030-1-adilov@disroot.org>", "Precedence": "bulk", "X-Mailing-List": "linux-i2c@vger.kernel.org", "List-Id": "<linux-i2c.vger.kernel.org>", "List-Subscribe": "<mailto:linux-i2c+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-i2c+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit" }, "content": "In RTL9607C i2c controller, in order to indicate that the width of\nmemory address is 8 bits, 0 is written to MEM_ADDR_WIDTH field as\nopposed to 1 for RTL9300 and RTL9310.\n\nIntroduce a new property to a driver data to indicate what value\nneed to written to MEM_ADDR_WIDTH field for this case.\n\nReviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>\nSigned-off-by: Rustam Adilov <adilov@disroot.org>\n---\n drivers/i2c/busses/i2c-rtl9300.c | 8 +++++++-\n 1 file changed, 7 insertions(+), 1 deletion(-)", "diff": "diff --git a/drivers/i2c/busses/i2c-rtl9300.c b/drivers/i2c/busses/i2c-rtl9300.c\nindex e40b4692a3fa..ffbc6c52861b 100644\n--- a/drivers/i2c/busses/i2c-rtl9300.c\n+++ b/drivers/i2c/busses/i2c-rtl9300.c\n@@ -66,6 +66,7 @@ struct rtl9300_i2c_drv_data {\n \tu32 wd_reg;\n \tu8 max_nchan;\n \tu8 max_data_len;\n+\tu8 reg_addr_8bit_len;\n };\n \n #define RTL9300_I2C_MUX_NCHAN\t8\n@@ -111,6 +112,7 @@ struct rtl9300_i2c_xfer {\n #define RTL9300_I2C_MST_DATA_WORD2\t\t\t0x10\n #define RTL9300_I2C_MST_DATA_WORD3\t\t\t0x14\n #define RTL9300_I2C_MST_GLB_CTRL\t\t\t0x384\n+#define RTL9300_REG_ADDR_8BIT_LEN\t\t\t1\n \n #define RTL9310_I2C_MST_IF_CTRL\t\t\t\t0x1004\n #define RTL9310_I2C_MST_IF_SEL\t\t\t\t0x1008\n@@ -305,6 +307,7 @@ static int rtl9300_i2c_smbus_xfer(struct i2c_adapter *adap, u16 addr, unsigned s\n \t\t\t\t union i2c_smbus_data *data)\n {\n \tstruct rtl9300_i2c_chan *chan = i2c_get_adapdata(adap);\n+\tconst struct rtl9300_i2c_drv_data *drv_data;\n \tstruct rtl9300_i2c *i2c = chan->i2c;\n \tstruct rtl9300_i2c_xfer xfer = {0};\n \tint ret;\n@@ -314,6 +317,7 @@ static int rtl9300_i2c_smbus_xfer(struct i2c_adapter *adap, u16 addr, unsigned s\n \n \tguard(rtl9300_i2c)(i2c);\n \n+\tdrv_data = device_get_match_data(i2c->dev);\n \tret = rtl9300_i2c_config_chan(i2c, chan);\n \tif (ret)\n \t\treturn ret;\n@@ -321,7 +325,7 @@ static int rtl9300_i2c_smbus_xfer(struct i2c_adapter *adap, u16 addr, unsigned s\n \txfer.dev_addr = addr & 0x7f;\n \txfer.write = (read_write == I2C_SMBUS_WRITE);\n \txfer.reg_addr = command;\n-\txfer.reg_addr_len = 1;\n+\txfer.reg_addr_len = drv_data->reg_addr_8bit_len;\n \n \tswitch (size) {\n \tcase I2C_SMBUS_BYTE:\n@@ -513,6 +517,7 @@ static const struct rtl9300_i2c_drv_data rtl9300_i2c_drv_data = {\n \t.wd_reg = RTL9300_I2C_MST_DATA_WORD0,\n \t.max_nchan = RTL9300_I2C_MUX_NCHAN,\n \t.max_data_len = RTL9300_I2C_MAX_DATA_LEN,\n+\t.reg_addr_8bit_len = RTL9300_REG_ADDR_8BIT_LEN,\n };\n \n static const struct rtl9300_i2c_drv_data rtl9310_i2c_drv_data = {\n@@ -536,6 +541,7 @@ static const struct rtl9300_i2c_drv_data rtl9310_i2c_drv_data = {\n \t.wd_reg = RTL9310_I2C_MST_DATA_CTRL,\n \t.max_nchan = RTL9310_I2C_MUX_NCHAN,\n \t.max_data_len = RTL9300_I2C_MAX_DATA_LEN,\n+\t.reg_addr_8bit_len = RTL9300_REG_ADDR_8BIT_LEN,\n };\n \n static const struct of_device_id i2c_rtl9300_dt_ids[] = {\n", "prefixes": [ "v5", "4/8" ] }