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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH v2 06/28] pinctrl: Add provisions to control GPIO pin direction
Date: Wed,  9 Nov 2016 08:13:54 -0800	[thread overview]
Message-ID: <1478708056-7875-7-git-send-email-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <1478708056-7875-1-git-send-email-andrew.smirnov@gmail.com>

Some SoC (of which Vybrid is a one example) relegate GPIO direction
control to their pinmux IP block, instead of having that functionality
within GPIO IP. Add provisions to control that aspect of pinmux to
support such SoCs.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 drivers/pinctrl/pinctrl.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 include/pinctrl.h         | 21 +++++++++++++++++++++
 2 files changed, 66 insertions(+)

diff --git a/drivers/pinctrl/pinctrl.c b/drivers/pinctrl/pinctrl.c
index e7b08a2..bef4fcd 100644
--- a/drivers/pinctrl/pinctrl.c
+++ b/drivers/pinctrl/pinctrl.c
@@ -24,6 +24,51 @@
 
 static LIST_HEAD(pinctrl_list);
 
+static struct pinctrl_device *pin_to_pinctrl(unsigned int pin)
+{
+	struct pinctrl_device *pinctrl;
+
+	list_for_each_entry(pinctrl, &pinctrl_list, list)
+		if (pin > pinctrl->base &&
+		    pin < pinctrl->base + pinctrl->npins)
+			return pinctrl;
+	return NULL;
+}
+
+static int pinctrl_gpio_direction(unsigned pin, bool input)
+{
+	struct pinctrl_device *pinctrl = pin_to_pinctrl(pin);
+
+	if (!pinctrl)
+		return -EINVAL;
+
+	BUG_ON(!pinctrl->ops->set_direction);
+
+	return pinctrl->ops->set_direction(pinctrl, pin, input);
+}
+
+int pinctrl_gpio_direction_input(unsigned int pin)
+{
+	return pinctrl_gpio_direction(pin, true);
+}
+
+int pinctrl_gpio_direction_output(unsigned int pin)
+{
+	return pinctrl_gpio_direction(pin, false);
+}
+
+int pinctrl_gpio_get_direction(unsigned pin)
+{
+	struct pinctrl_device *pinctrl = pin_to_pinctrl(pin);
+
+	if (!pinctrl)
+		return -EINVAL;
+
+	BUG_ON(!pinctrl->ops->get_direction);
+
+	return pinctrl->ops->get_direction(pinctrl, pin);
+}
+
 static struct pinctrl_device *find_pinctrl(struct device_node *node)
 {
 	struct pinctrl_device *pdev;
diff --git a/include/pinctrl.h b/include/pinctrl.h
index 0f03b10..0fde3f9 100644
--- a/include/pinctrl.h
+++ b/include/pinctrl.h
@@ -5,6 +5,8 @@ struct pinctrl_device;
 
 struct pinctrl_ops {
 	int (*set_state)(struct pinctrl_device *, struct device_node *);
+	int (*set_direction)(struct pinctrl_device *, unsigned int, bool);
+	int (*get_direction)(struct pinctrl_device *, unsigned int);
 };
 
 struct pinctrl_device {
@@ -12,6 +14,7 @@ struct pinctrl_device {
 	struct pinctrl_ops *ops;
 	struct list_head list;
 	struct device_node *node;
+	unsigned int base, npins;
 };
 
 int pinctrl_register(struct pinctrl_device *pdev);
@@ -22,6 +25,9 @@ int pinctrl_select_state(struct device_d *dev, const char *state);
 int pinctrl_select_state_default(struct device_d *dev);
 int of_pinctrl_select_state(struct device_node *np, const char *state);
 int of_pinctrl_select_state_default(struct device_node *np);
+int pinctrl_gpio_direction_input(unsigned pin);
+int pinctrl_gpio_direction_output(unsigned int pin);
+int pinctrl_gpio_get_direction(unsigned pin);
 #else
 static inline int pinctrl_select_state(struct device_d *dev, const char *state)
 {
@@ -42,6 +48,21 @@ static inline int of_pinctrl_select_state_default(struct device_node *np)
 {
 	return -ENODEV;
 }
+
+static inline int pinctrl_gpio_direction_input(unsigend pin)
+{
+	return -ENOTSUPP;
+}
+
+static inline int pinctrl_gpio_direction_output(unsigned int pin)
+{
+	return -ENOTSUPP;
+}
+
+static inline int pinctrl_gpio_get_direction(unsigned pin)
+{
+	return -ENOTSUPP;
+}
 #endif
 
 #endif /* PINCTRL_H */
-- 
2.5.5


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  parent reply	other threads:[~2016-11-09 16:15 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-09 16:13 [PATCH v2 00/28] Vybrid support in Barebox Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 01/28] i.MX: Add primitive functions for VF610 family Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 02/28] i.MX: Add register definitions for VF610 SoC Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 03/28] i.MX: Add DEBUG_LL hooks for VF610 Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 04/28] i.MX: scripts: Add "vf610" soc to imx-image Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 05/28] i.MX: Add support for VF610 Tower board Andrey Smirnov
2016-11-09 16:13 ` Andrey Smirnov [this message]
2016-11-09 16:13 ` [PATCH v2 07/28] i.MX: Add pinctrl driver for VF610 Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 08/28] clk: Port clock dependency resolution code Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 09/28] clk: Port of_clk_set_defaults() Andrey Smirnov
2016-11-15  7:53   ` Sascha Hauer
2016-11-09 16:13 ` [PATCH v2 10/28] i.MX: Move clk code from 'mach-imx' to 'drivers' Andrey Smirnov
2016-11-09 16:13 ` [PATCH v2 11/28] i.MX: clk: Port imx_clk_gate2_cgr() Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 12/28] i.MX: clk: Add IMX_PLLV3_USB_VF610 support Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 13/28] i.MX: clk: Port imx_check_clocks() Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 14/28] i.MX: clk: Port imx_clk_mux_flags from Linux Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 15/28] i.MX: Add VF610 clock tree initialization code Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 16/28] vf610: Give enet_osc explicit "enet_ext" name Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 17/28] i.MX: Add 'lpuart' serial driver Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 18/28] i.MX: i2c: Use read/write adapter functions Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 19/28] i.MX: i2c: Add Vybrid support Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 20/28] i.MX: esdhc: Do not rely on CPU type for quirks Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 21/28] i.MX: esdhc: Request "per" clock explicitly Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 22/28] i.MX: Kconfig: Enable OCOTP on Vybrid Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 23/28] i.MX: ocotp: Remove unused #define Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 24/28] i.MX: ocotp: Account for shadow memory gaps Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 25/28] i.MX: ocotp: Add Vybrid support Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 26/28] i.MX: fec: Enable all clocks specified for FEC Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 27/28] i.MX: fec: Add support for Vybrid variant Andrey Smirnov
2016-11-09 16:14 ` [PATCH v2 28/28] gpio: Add GPIO driver for Vybrid Andrey Smirnov
2016-11-11  8:21 ` [PATCH v2 00/28] Vybrid support in Barebox Sascha Hauer

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