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Message-Id: <1417137993-8337-8-git-send-email-soren.brinkmann@xilinx.com>
Date: Thu, 27 Nov 2014 17:26:33 -0800
From: Soren Brinkmann <soren.brinkmann@...inx.com>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Sören Brinkmann <soren.brinkmann@...inx.com>,
Michal Simek <michal.simek@...inx.com>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
Alessandro Rubini <rubini@...pv.it>,
Heiko Stuebner <heiko@...ech.de>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
linux-rockchip@...ts.infradead.org, linux-sh@...r.kernel.org,
"Ivan T. Ivanov" <iivanov@...sol.com>,
Bjorn Andersson <bjorn.andersson@...ymobile.com>,
Beniamino Galvani <b.galvani@...il.com>
Subject: [PATCH v2 7/7] pinctrl: qcom-spmi-gpio: Migrate to pinconf-generic
Instead of the driver caring about implementation details like device
tree, just provide information about driver specific pinconf parameters
to pinconf-generic which takes care of parsing the DT.
Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
---
This is compile tested only. So, it's likely that it needs more tweaking
to make it actually work on HW. But it illustrates the potential
benefits of the pinconf-generic changes in this series.
---
drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 125 +++----------------------------
1 file changed, 11 insertions(+), 114 deletions(-)
diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
index b863b5080890..2db85e53ef73 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
@@ -131,14 +131,14 @@ struct pmic_gpio_state {
struct gpio_chip chip;
};
-struct pmic_gpio_bindings {
- const char *property;
- unsigned param;
+static const struct pinconf_generic_dt_params pmic_gpio_bindings[] = {
+ {"qcom,pull-up-strength", PMIC_GPIO_CONF_PULL_UP, 0},
+ {"qcom,drive-strength", PMIC_GPIO_CONF_STRENGTH, 0},
};
-static struct pmic_gpio_bindings pmic_gpio_bindings[] = {
- {"qcom,pull-up-strength", PMIC_GPIO_CONF_PULL_UP},
- {"qcom,drive-strength", PMIC_GPIO_CONF_STRENGTH},
+static const struct pin_config_item pmic_conf_items[] = {
+ PCONFDUMP(PMIC_GPIO_CONF_PULL_UP, "pull-up-strength", NULL, true),
+ PCONFDUMP(PMIC_GPIO_CONF_STRENGTH, "drive-strength", NULL, true),
};
static const char *const pmic_gpio_groups[] = {
@@ -209,118 +209,11 @@ static int pmic_gpio_get_group_pins(struct pinctrl_dev *pctldev, unsigned pin,
return 0;
}
-static int pmic_gpio_parse_dt_config(struct device_node *np,
- struct pinctrl_dev *pctldev,
- unsigned long **configs,
- unsigned int *nconfs)
-{
- struct pmic_gpio_bindings *par;
- unsigned long cfg;
- int ret, i;
- u32 val;
-
- for (i = 0; i < ARRAY_SIZE(pmic_gpio_bindings); i++) {
- par = &pmic_gpio_bindings[i];
- ret = of_property_read_u32(np, par->property, &val);
-
- /* property not found */
- if (ret == -EINVAL)
- continue;
-
- /* use zero as default value */
- if (ret)
- val = 0;
-
- dev_dbg(pctldev->dev, "found %s with value %u\n",
- par->property, val);
-
- cfg = pinconf_to_config_packed(par->param, val);
-
- ret = pinctrl_utils_add_config(pctldev, configs, nconfs, cfg);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static int pmic_gpio_dt_subnode_to_map(struct pinctrl_dev *pctldev,
- struct device_node *np,
- struct pinctrl_map **map,
- unsigned *reserv, unsigned *nmaps,
- enum pinctrl_map_type type)
-{
- unsigned long *configs = NULL;
- unsigned nconfs = 0;
- struct property *prop;
- const char *group;
- int ret;
-
- ret = pmic_gpio_parse_dt_config(np, pctldev, &configs, &nconfs);
- if (ret < 0)
- return ret;
-
- if (!nconfs)
- return 0;
-
- ret = of_property_count_strings(np, "pins");
- if (ret < 0)
- goto exit;
-
- ret = pinctrl_utils_reserve_map(pctldev, map, reserv, nmaps, ret);
- if (ret < 0)
- goto exit;
-
- of_property_for_each_string(np, "pins", prop, group) {
- ret = pinctrl_utils_add_map_configs(pctldev, map,
- reserv, nmaps, group,
- configs, nconfs, type);
- if (ret < 0)
- break;
- }
-exit:
- kfree(configs);
- return ret;
-}
-
-static int pmic_gpio_dt_node_to_map(struct pinctrl_dev *pctldev,
- struct device_node *np_config,
- struct pinctrl_map **map, unsigned *nmaps)
-{
- enum pinctrl_map_type type;
- struct device_node *np;
- unsigned reserv;
- int ret;
-
- ret = 0;
- *map = NULL;
- *nmaps = 0;
- reserv = 0;
- type = PIN_MAP_TYPE_CONFIGS_GROUP;
-
- for_each_child_of_node(np_config, np) {
- ret = pinconf_generic_dt_subnode_to_map(pctldev, np, map,
- &reserv, nmaps, type);
- if (ret)
- break;
-
- ret = pmic_gpio_dt_subnode_to_map(pctldev, np, map, &reserv,
- nmaps, type);
- if (ret)
- break;
- }
-
- if (ret < 0)
- pinctrl_utils_dt_free_map(pctldev, *map, *nmaps);
-
- return ret;
-}
-
static const struct pinctrl_ops pmic_gpio_pinctrl_ops = {
.get_groups_count = pmic_gpio_get_groups_count,
.get_group_name = pmic_gpio_get_group_name,
.get_group_pins = pmic_gpio_get_group_pins,
- .dt_node_to_map = pmic_gpio_dt_node_to_map,
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
.dt_free_map = pinctrl_utils_dt_free_map,
};
@@ -590,6 +483,7 @@ static void pmic_gpio_config_dbg_show(struct pinctrl_dev *pctldev,
}
static const struct pinconf_ops pmic_gpio_pinconf_ops = {
+ .is_generic = true,
.pin_config_group_get = pmic_gpio_config_get,
.pin_config_group_set = pmic_gpio_config_set,
.pin_config_group_dbg_show = pmic_gpio_config_dbg_show,
@@ -848,6 +742,9 @@ static int pmic_gpio_probe(struct platform_device *pdev)
pctrldesc->name = dev_name(dev);
pctrldesc->pins = pindesc;
pctrldesc->npins = npins;
+ pctrldesc->num_dt_params = ARRAY_SIZE(pmic_gpio_bindings);
+ pctrldesc->params = pmic_gpio_bindings;
+ pctrldesc->conf_items = pmic_conf_items;
for (i = 0; i < npins; i++, pindesc++) {
pad = &pads[i];
--
2.1.3.1.ge241007
--
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