| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20241226-amlogic-pinctrl-v2-2-cdae42a67b76@amlogic.com>
Date: Thu, 26 Dec 2024 15:57:42 +0800
From: Xianwei Zhao via B4 Relay <devnull+xianwei.zhao.amlogic.com@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Neil Armstrong <neil.armstrong@...aro.org>,
Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
Bartosz Golaszewski <brgl@...ev.pl>
Cc: linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org, Xianwei Zhao <xianwei.zhao@...ogic.com>
Subject: [PATCH v2 2/5] pinctrl: pinconf-generic: Add API for pinmux
propertity in DTS file
From: Xianwei Zhao <xianwei.zhao@...ogic.com>
When describing pin mux func through pinmux propertity,
a standard API is added for support. The pinmux contains pin
identification and mux values, which can include multiple
pins. And groups configuration use other word. DTS such as:
func-name {
group_alias: group-name{
pinmux= <pin_id << 8 | mux_value)>,
<pin_id << 8 | mux_value)>;
bias-pull-up;
drive-strength-microamp = <4000>;
};
};
Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
---
drivers/pinctrl/pinconf-generic.c | 130 ++++++++++++++++++++++++++++++++
drivers/pinctrl/pinconf.h | 4 +
include/linux/pinctrl/pinconf-generic.h | 4 +
3 files changed, 138 insertions(+)
diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c
index 0b13d7f17b32..a4d3c12a80c4 100644
--- a/drivers/pinctrl/pinconf-generic.c
+++ b/drivers/pinctrl/pinconf-generic.c
@@ -233,6 +233,67 @@ static void parse_dt_cfg(struct device_node *np,
}
}
+/**
+ * pinconf_generic_parse_dt_pinmux()
+ * parse the pinmux properties into generic pin mux values.
+ * @np: node containing the pinmux properties
+ * @pctldev: pincontrol device
+ * @pid: array with pin identity entries
+ * @pmux: array with pin mux value entries
+ * @npins: number of pins
+ *
+ * pinmux propertity: mux value [0,7]bits and pin identity [8,31]bits.
+ */
+int pinconf_generic_parse_dt_pinmux(struct device_node *np, struct device *dev,
+ unsigned int **pid, unsigned int **pmux,
+ unsigned int *npins)
+{
+ unsigned int *pid_t;
+ unsigned int *pmux_t;
+ struct property *prop;
+ unsigned int npins_t, i;
+ u32 value;
+ int ret;
+
+ prop = of_find_property(np, "pinmux", NULL);
+ if (!prop) {
+ dev_info(dev, "Missing pinmux property\n");
+ return -ENOENT;
+ }
+
+ if (!pid || !pmux || !npins) {
+ dev_err(dev, "paramers error\n");
+ return -EINVAL;
+ }
+
+ npins_t = prop->length / sizeof(u32);
+ pid_t = devm_kcalloc(dev, npins_t, sizeof(*pid_t), GFP_KERNEL);
+ pmux_t = devm_kcalloc(dev, npins_t, sizeof(*pmux_t), GFP_KERNEL);
+ if (!pid_t || !pmux_t) {
+ dev_err(dev, "kalloc memory fail\n");
+ return -ENOMEM;
+ }
+ for (i = 0; i < npins_t; i++) {
+ ret = of_property_read_u32_index(np, "pinmux", i, &value);
+ if (ret) {
+ dev_err(dev, "get pinmux value fail\n");
+ goto exit;
+ }
+ pmux_t[i] = value & 0xff;
+ pid_t[i] = (value >> 8) & 0xffffff;
+ }
+ *pid = pid_t;
+ *pmux = pmux_t;
+ *npins = npins_t;
+
+ return 0;
+exit:
+ devm_kfree(dev, pid_t);
+ devm_kfree(dev, pmux_t);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pinconf_generic_parse_dt_pinmux);
+
/**
* pinconf_generic_parse_dt_config()
* parse the config properties into generic pinconfig values.
@@ -295,6 +356,75 @@ int pinconf_generic_parse_dt_config(struct device_node *np,
}
EXPORT_SYMBOL_GPL(pinconf_generic_parse_dt_config);
+int pinconf_generic_dt_node_to_map_pinmux(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **map,
+ unsigned int *num_maps)
+{
+ struct device *dev = pctldev->dev;
+ struct device_node *pnode;
+ unsigned long *configs = NULL;
+ unsigned int num_configs = 0;
+ struct property *prop;
+ unsigned int reserved_maps;
+ int reserve;
+ int ret;
+
+ prop = of_find_property(np, "pinmux", NULL);
+ if (!prop) {
+ dev_info(dev, "Missing pinmux property\n");
+ return -ENOENT;
+ }
+
+ pnode = of_get_parent(np);
+ if (!pnode) {
+ dev_info(dev, "Missing function node\n");
+ return -EINVAL;
+ }
+
+ reserved_maps = 0;
+ *map = NULL;
+ *num_maps = 0;
+
+ ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
+ &num_configs);
+ if (ret < 0) {
+ dev_err(dev, "%pOF: could not parse node property\n", np);
+ return ret;
+ }
+
+ reserve = 1;
+ if (num_configs)
+ reserve++;
+
+ ret = pinctrl_utils_reserve_map(pctldev, map, &reserved_maps,
+ num_maps, reserve);
+ if (ret < 0)
+ goto exit;
+
+ ret = pinctrl_utils_add_map_mux(pctldev, map,
+ &reserved_maps, num_maps, np->name,
+ pnode->name);
+ if (ret < 0)
+ goto exit;
+
+ if (num_configs) {
+ ret = pinctrl_utils_add_map_configs(pctldev, map, &reserved_maps,
+ num_maps, np->name, configs,
+ num_configs, PIN_MAP_TYPE_CONFIGS_GROUP);
+ if (ret < 0)
+ goto exit;
+ }
+
+exit:
+ kfree(configs);
+ if (ret)
+ pinctrl_utils_free_map(pctldev, *map, *num_maps);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pinconf_generic_dt_node_to_map_pinmux);
+
int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *np, struct pinctrl_map **map,
unsigned int *reserved_maps, unsigned int *num_maps,
diff --git a/drivers/pinctrl/pinconf.h b/drivers/pinctrl/pinconf.h
index a14c950bc700..a171195b3615 100644
--- a/drivers/pinctrl/pinconf.h
+++ b/drivers/pinctrl/pinconf.h
@@ -138,4 +138,8 @@ int pinconf_generic_parse_dt_config(struct device_node *np,
struct pinctrl_dev *pctldev,
unsigned long **configs,
unsigned int *nconfigs);
+
+int pinconf_generic_parse_dt_pinmux(struct device_node *np, struct device *dev,
+ unsigned int **pid, unsigned int **pmux,
+ unsigned int *npins);
#endif
diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h
index 53cfde98433d..1bcf071b860e 100644
--- a/include/linux/pinctrl/pinconf-generic.h
+++ b/include/linux/pinctrl/pinconf-generic.h
@@ -232,4 +232,8 @@ static inline int pinconf_generic_dt_node_to_map_all(struct pinctrl_dev *pctldev
PIN_MAP_TYPE_INVALID);
}
+int pinconf_generic_dt_node_to_map_pinmux(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **map,
+ unsigned int *num_maps);
#endif /* __LINUX_PINCTRL_PINCONF_GENERIC_H */
--
2.37.1
Powered by blists - more mailing lists