From patchwork Tue Jun 30 08:29:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 489548 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id BE7591402B9 for ; Tue, 30 Jun 2015 18:30:01 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752372AbbF3IaA (ORCPT ); Tue, 30 Jun 2015 04:30:00 -0400 Received: from galahad.ideasonboard.com ([185.26.127.97]:50544 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750952AbbF3I35 (ORCPT ); Tue, 30 Jun 2015 04:29:57 -0400 Received: from localhost.localdomain (unknown [91.178.139.204]) by galahad.ideasonboard.com (Postfix) with ESMTPSA id 1424F20114; Tue, 30 Jun 2015 10:29:45 +0200 (CEST) From: Laurent Pinchart To: linux-gpio@vger.kernel.org Cc: linux-sh@vger.kernel.org, devicetree@vger.kernel.org, Linus Walleij Subject: [PATCH] pinctrl: sh-pfc: Accept standard function, pins and groups properties Date: Tue, 30 Jun 2015 11:29:57 +0300 Message-Id: <1435652997-25254-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.3.6 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The "function", "pins" and "groups" pinmux and pinctrl properties have been standardized. Support them in addition to the custom "renesas,*" properties. New-style and old-style properties can't be mixed in DT. Signed-off-by: Laurent Pinchart --- .../bindings/pinctrl/renesas,pfc-pinctrl.txt | 20 +++++------ drivers/pinctrl/sh-pfc/pinctrl.c | 42 +++++++++++++++++----- 2 files changed, 44 insertions(+), 18 deletions(-) diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt index 51cee44fc140..e089142cfb14 100644 --- a/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt @@ -58,12 +58,12 @@ are parsed through phandles and processed purely based on their content. Pin Configuration Node Properties: -- renesas,pins : An array of strings, each string containing the name of a pin. -- renesas,groups : An array of strings, each string containing the name of a pin +- pins : An array of strings, each string containing the name of a pin. +- groups : An array of strings, each string containing the name of a pin group. -- renesas,function: A string containing the name of the function to mux to the - pin group(s) specified by the renesas,groups property +- function: A string containing the name of the function to mux to the pin + group(s) specified by the groups property. Valid values for pin, group and function names can be found in the group and function arrays of the PFC data file corresponding to the SoC @@ -141,19 +141,19 @@ Example 3: KZM-A9-GT (SH-Mobile AG5) default pin state hog and pin control maps mmcif_pins: mmcif { mux { - renesas,groups = "mmc0_data8_0", "mmc0_ctrl_0"; - renesas,function = "mmc0"; + groups = "mmc0_data8_0", "mmc0_ctrl_0"; + function = "mmc0"; }; cfg { - renesas,groups = "mmc0_data8_0"; - renesas,pins = "PORT279"; + groups = "mmc0_data8_0"; + pins = "PORT279"; bias-pull-up; }; }; scifa4_pins: scifa4 { - renesas,groups = "scifa4_data", "scifa4_ctrl"; - renesas,function = "scifa4"; + groups = "scifa4_data", "scifa4_ctrl"; + function = "scifa4"; }; }; diff --git a/drivers/pinctrl/sh-pfc/pinctrl.c b/drivers/pinctrl/sh-pfc/pinctrl.c index ff678966008b..6fe7459f0ccb 100644 --- a/drivers/pinctrl/sh-pfc/pinctrl.c +++ b/drivers/pinctrl/sh-pfc/pinctrl.c @@ -40,6 +40,10 @@ struct sh_pfc_pinctrl { struct pinctrl_pin_desc *pins; struct sh_pfc_pin_config *configs; + + const char *func_prop_name; + const char *groups_prop_name; + const char *pins_prop_name; }; static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev) @@ -96,10 +100,13 @@ static int sh_pfc_map_add_config(struct pinctrl_map *map, return 0; } -static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, +static int sh_pfc_dt_subnode_to_map(struct pinctrl_dev *pctldev, + struct device_node *np, struct pinctrl_map **map, unsigned int *num_maps, unsigned int *index) { + struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + struct device *dev = pmx->pfc->dev; struct pinctrl_map *maps = *map; unsigned int nmaps = *num_maps; unsigned int idx = *index; @@ -113,10 +120,27 @@ static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, const char *pin; int ret; + /* Support both the old Renesas-specific properties and the new standard + * properties. Mixing old and new properties isn't allowed, neither + * inside a subnode nor across subnodes. + */ + if (!pmx->func_prop_name) { + if (of_find_property(np, "groups", NULL) || + of_find_property(np, "pins", NULL)) { + pmx->func_prop_name = "function"; + pmx->groups_prop_name = "groups"; + pmx->pins_prop_name = "pins"; + } else { + pmx->func_prop_name = "renesas,function"; + pmx->groups_prop_name = "renesas,groups"; + pmx->pins_prop_name = "renesas,pins"; + } + } + /* Parse the function and configuration properties. At least a function * or one configuration must be specified. */ - ret = of_property_read_string(np, "renesas,function", &function); + ret = of_property_read_string(np, pmx->func_prop_name, &function); if (ret < 0 && ret != -EINVAL) { dev_err(dev, "Invalid function in DT\n"); return ret; @@ -129,11 +153,12 @@ static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, if (!function && num_configs == 0) { dev_err(dev, "DT node must contain at least a function or config\n"); + ret = -ENODEV; goto done; } /* Count the number of pins and groups and reallocate mappings. */ - ret = of_property_count_strings(np, "renesas,pins"); + ret = of_property_count_strings(np, pmx->pins_prop_name); if (ret == -EINVAL) { num_pins = 0; } else if (ret < 0) { @@ -143,7 +168,7 @@ static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, num_pins = ret; } - ret = of_property_count_strings(np, "renesas,groups"); + ret = of_property_count_strings(np, pmx->groups_prop_name); if (ret == -EINVAL) { num_groups = 0; } else if (ret < 0) { @@ -174,7 +199,7 @@ static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, *num_maps = nmaps; /* Iterate over pins and groups and create the mappings. */ - of_property_for_each_string(np, "renesas,groups", prop, group) { + of_property_for_each_string(np, pmx->groups_prop_name, prop, group) { if (function) { maps[idx].type = PIN_MAP_TYPE_MUX_GROUP; maps[idx].data.mux.group = group; @@ -198,7 +223,7 @@ static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, goto done; } - of_property_for_each_string(np, "renesas,pins", prop, pin) { + of_property_for_each_string(np, pmx->pins_prop_name, prop, pin) { ret = sh_pfc_map_add_config(&maps[idx], pin, PIN_MAP_TYPE_CONFIGS_PIN, configs, num_configs); @@ -246,7 +271,7 @@ static int sh_pfc_dt_node_to_map(struct pinctrl_dev *pctldev, index = 0; for_each_child_of_node(np, child) { - ret = sh_pfc_dt_subnode_to_map(dev, child, map, num_maps, + ret = sh_pfc_dt_subnode_to_map(pctldev, child, map, num_maps, &index); if (ret < 0) goto done; @@ -254,7 +279,8 @@ static int sh_pfc_dt_node_to_map(struct pinctrl_dev *pctldev, /* If no mapping has been found in child nodes try the config node. */ if (*num_maps == 0) { - ret = sh_pfc_dt_subnode_to_map(dev, np, map, num_maps, &index); + ret = sh_pfc_dt_subnode_to_map(pctldev, np, map, num_maps, + &index); if (ret < 0) goto done; }