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GET /api/1.1/patches/2227591/?format=api
{ "id": 2227591, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2227591/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260424-ds90ub953-v6-2-7a84efbab316@oss.nxp.com/", "project": { "id": 42, "url": "http://patchwork.ozlabs.org/api/1.1/projects/42/?format=api", "name": "Linux GPIO development", "link_name": "linux-gpio", "list_id": "linux-gpio.vger.kernel.org", "list_email": "linux-gpio@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260424-ds90ub953-v6-2-7a84efbab316@oss.nxp.com>", "date": "2026-04-24T01:42:25", "name": "[v6,2/4] media: i2c: ds90ub953: Add back channel GPIO support", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "83a5e08373a352a61b49bf98c8f967791b799d3b", "submitter": { "id": 86694, "url": "http://patchwork.ozlabs.org/api/1.1/people/86694/?format=api", "name": "Guoniu Zhou", "email": "guoniu.zhou@oss.nxp.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-gpio/patch/20260424-ds90ub953-v6-2-7a84efbab316@oss.nxp.com/mbox/", "series": [ { "id": 501274, "url": "http://patchwork.ozlabs.org/api/1.1/series/501274/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-gpio/list/?series=501274", "date": "2026-04-24T01:42:23", "name": "media: i2c: ds90ub953: Add back channel GPIO support", "version": 6, "mbox": "http://patchwork.ozlabs.org/series/501274/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227591/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227591/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-gpio+bounces-35450-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-gpio@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) 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header.from=oss.nxp.com;\n dkim=pass header.d=oss.nxp.com; arc=none" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com;\n s=selector1-NXP1-onmicrosoft-com;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=62f+Qx0wlmDEkQvxsskjpFYSF7HYxHmyfReCsejF4Rc=;\n b=xdVtIpRnCQmD7yJdbk+L+nq7eENdHD7FQbZvQBYpRNliNPod0y77f4vFUt4ZoeN4zTLs4H48kGdXg+0YTno3AulAvT1GAarDyHGzB5+MBxY4YIQYKTnYX3Ro/kBnmnVzugUOLLQpSxPA0HrG4nfIlVKVGkUpy/5lt1B/eKkU7N4mlVypJLI5R4bRznvxBkJDOoWjS2jrnctGSpQt2Jwrp6AuIck+8VI/gLXrYWXJAHDibk00MMVneflcFYZnpt8PPw8DZQ5AlAM16E7wutIgRcfYrrp274qvQWdqRvYag5TqEp06rlpXzYKtKvwxKY8nRZ7pt76oft1vwMznypqncw==", "From": "Guoniu Zhou <guoniu.zhou@oss.nxp.com>", "Date": "Fri, 24 Apr 2026 09:42:25 +0800", "Subject": "[PATCH v6 2/4] media: i2c: ds90ub953: Add back channel GPIO\n support", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260424-ds90ub953-v6-2-7a84efbab316@oss.nxp.com>", "References": "<20260424-ds90ub953-v6-0-7a84efbab316@oss.nxp.com>", "In-Reply-To": "<20260424-ds90ub953-v6-0-7a84efbab316@oss.nxp.com>", "To": "Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,\n Mauro Carvalho Chehab <mchehab@kernel.org>, Rob Herring <robh@kernel.org>,\n Krzysztof Kozlowski <krzk+dt@kernel.org>,\n Conor Dooley <conor+dt@kernel.org>, Frank Li <Frank.Li@nxp.com>,\n Vladimir Zapolskiy <vz@mleia.com>, Linus Walleij <linusw@kernel.org>,\n Bartosz Golaszewski <brgl@kernel.org>", "Cc": "linux-media@vger.kernel.org, devicetree@vger.kernel.org,\n linux-kernel@vger.kernel.org, imx@lists.linux.dev,\n linux-gpio@vger.kernel.org, Guoniu Zhou <guoniu.zhou@nxp.com>", "X-Mailer": "b4 0.14.0", "X-Developer-Signature": "v=1; a=ed25519-sha256; t=1776994953; l=3804;\n i=guoniu.zhou@oss.nxp.com; s=20250815; h=from:subject:message-id;\n bh=gje9vH51hA/z/uPiO/U0Y8u7/GSL19gAMVItmcpKXyk=;\n 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"X-OriginatorOrg": "oss.nxp.com", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n bab77a13-dd2c-46d9-e6e0-08dea1a267d2", "X-MS-Exchange-CrossTenant-AuthSource": "AS8PR04MB9080.eurprd04.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "24 Apr 2026 01:40:03.3080\n (UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "686ea1d3-bc2b-4c6f-a92c-d99c5c301635", "X-MS-Exchange-CrossTenant-MailboxType": "HOSTED", "X-MS-Exchange-CrossTenant-UserPrincipalName": "\n MmIhQoQ4WuKgMIk4JK4Cwm4T6A3rLYlZOLdWp43aiEQ7KI/Sq+bX8veuy6f2F0t9yBsDfjwiDOHenlyJJtw4jg==", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "VE1PR04MB7455" }, "content": "From: Guoniu Zhou <guoniu.zhou@nxp.com>\n\nThe ds90ub953 supports GPIO0 through GPIO3. When enabled as an output,\neach GPIO pin can be programed to output remote data coming from the\ncompatible deserializer using the register LOCAL_GPIO_DATA[7:4] field.\n\nAdd back channel GPIO support by parsing flags from device tree.\n\nSigned-off-by: Guoniu Zhou <guoniu.zhou@nxp.com>\n---\nChanges in v6:\n- Changed approach from extending GPIO range (v5) to using a custom GPIO\n flag (GPIO_DATA_SOURCE_REMOTE) as suggested by the driver maintainer\n\nChanges in v4:\n- Only log GPIO 0-3 stats since remote GPIO 4-7 reuse GPIO 0-3 pins.\n\nChanges in v3:\n- Update driver to expand GPIO range.\n\nChanges in v2:\n- Parse gpio third cell to select which GPIO pin the data from remote\n compatible deserializer.\n---\n drivers/media/i2c/ds90ub953.c | 51 ++++++++++++++++++++++++++++++++++++++-----\n 1 file changed, 45 insertions(+), 6 deletions(-)", "diff": "diff --git a/drivers/media/i2c/ds90ub953.c b/drivers/media/i2c/ds90ub953.c\nindex a8ab67f4137f..da63dcfbbbc3 100644\n--- a/drivers/media/i2c/ds90ub953.c\n+++ b/drivers/media/i2c/ds90ub953.c\n@@ -27,6 +27,8 @@\n #include <media/v4l2-mediabus.h>\n #include <media/v4l2-subdev.h>\n \n+#include <dt-bindings/gpio/gpio.h>\n+\n #include \"ds90ub953.h\"\n \n #define UB953_PAD_SINK\t\t\t0\n@@ -71,6 +73,7 @@ struct ub953_data {\n \tbool\t\t\tnon_continous_clk;\n \n \tstruct gpio_chip\tgpio_chip;\n+\tu32\t\t\tgpio_flags[UB953_NUM_GPIOS];\n \n \tstruct v4l2_subdev\tsd;\n \tstruct media_pad\tpads[2];\n@@ -258,6 +261,12 @@ static int ub953_write_ind(struct ub953_data *priv, u8 block, u8 reg, u8 val,\n /*\n * GPIO chip\n */\n+\n+static inline bool ub953_gpio_is_remote(unsigned int flag)\n+{\n+\treturn !!(flag & GPIO_DATA_SOURCE_REMOTE);\n+}\n+\n static int ub953_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)\n {\n \tstruct ub953_data *priv = gpiochip_get_data(gc);\n@@ -288,13 +297,23 @@ static int ub953_gpio_direction_out(struct gpio_chip *gc, unsigned int offset,\n \t\t\t\t int value)\n {\n \tstruct ub953_data *priv = gpiochip_get_data(gc);\n+\tbool is_remote = ub953_gpio_is_remote(priv->gpio_flags[offset]);\n+\tunsigned int mask, val;\n \tint ret;\n \n-\tret = regmap_update_bits(priv->regmap, UB953_REG_LOCAL_GPIO_DATA,\n-\t\t\t\t UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset),\n-\t\t\t\t value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) :\n-\t\t\t\t\t 0);\n+\tmask = UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) |\n+\t UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(offset);\n \n+\tif (is_remote) {\n+\t\t/* Enable remote deserializer GPIO data on local GPIO */\n+\t\tval = UB953_REG_LOCAL_GPIO_DATA_GPIO_RMTEN(offset);\n+\t} else {\n+\t\t/* Set output value on local GPIO and disable remote mode */\n+\t\tval = value ? UB953_REG_LOCAL_GPIO_DATA_GPIO_OUT_SRC(offset) : 0;\n+\t}\n+\n+\tret = regmap_update_bits(priv->regmap, UB953_REG_LOCAL_GPIO_DATA,\n+\t\t\t\t mask, val);\n \tif (ret)\n \t\treturn ret;\n \n@@ -330,10 +349,30 @@ static int ub953_gpio_of_xlate(struct gpio_chip *gc,\n \t\t\t const struct of_phandle_args *gpiospec,\n \t\t\t u32 *flags)\n {\n+\tstruct ub953_data *priv = gpiochip_get_data(gc);\n+\tstruct device *dev = &priv->client->dev;\n+\tu32 pin;\n+\n+\tif (WARN_ON(gc->of_gpio_n_cells < 2))\n+\t\treturn -EINVAL;\n+\n+\tif (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))\n+\t\treturn -EINVAL;\n+\n+\tpin = gpiospec->args[0];\n+\tif (pin >= UB953_NUM_GPIOS) {\n+\t\tdev_err(dev, \"Invalid GPIO pin number: %u\\n\", pin);\n+\t\treturn -EINVAL;\n+\t}\n+\n+\t/* Store GPIO flags for each pin */\n+\tpriv->gpio_flags[pin] = gpiospec->args[1];\n+\n+\t/* Return standard flags to GPIO core */\n \tif (flags)\n-\t\t*flags = gpiospec->args[1];\n+\t\t*flags = gpiospec->args[1] & ~GPIO_DATA_SOURCE_REMOTE;\n \n-\treturn gpiospec->args[0];\n+\treturn pin;\n }\n \n static int ub953_gpiochip_probe(struct ub953_data *priv)\n", "prefixes": [ "v6", "2/4" ] }