[U-Boot] [RFC v2 PATCH 3/3] pinctrl: sandbox: add sandbox pinctrl driver
Masahiro Yamada
yamada.masahiro at socionext.com
Mon Aug 10 17:55:32 CEST 2015
This driver actually does nothing but test pinctrl uclass, and
demonstrate how things work.
To try this driver, uncomment /* #define DEBUG */ in the
drivers/pinctrl/pinctrl-sandbox.c, and debug messages will be
displayed.
DRAM: 128 MiB
sandbox pinmux: group = 1 (serial_a), function = 1 (serial)
Using default environment
In: cros-ec-keyb
Out: lcd
Err: lcd
Net: Net Initialization Skipped
eth0: eth at 10002000, eth1: eth at 80000000, eth5: eth at 90000000
=> i2c dev 0
Setting bus to 0
sandbox pinmux: group = 0 (i2c), function = 0 (i2c)
sandbox pinconf: group = 0 (i2c), param = 3, arg = 1
Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
---
arch/sandbox/dts/sandbox.dts | 19 +++++
configs/sandbox_defconfig | 5 ++
drivers/pinctrl/Kconfig | 3 +
drivers/pinctrl/Makefile | 2 +
drivers/pinctrl/pinctrl-sandbox.c | 157 ++++++++++++++++++++++++++++++++++++++
5 files changed, 186 insertions(+)
create mode 100644 drivers/pinctrl/pinctrl-sandbox.c
diff --git a/arch/sandbox/dts/sandbox.dts b/arch/sandbox/dts/sandbox.dts
index 8927527..9aad39c 100644
--- a/arch/sandbox/dts/sandbox.dts
+++ b/arch/sandbox/dts/sandbox.dts
@@ -92,6 +92,8 @@
reg = <0 0>;
compatible = "sandbox,i2c";
clock-frequency = <400000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2c0>;
eeprom at 2c {
reg = <0x2c>;
compatible = "i2c-eeprom";
@@ -136,6 +138,21 @@
};
};
+ pinctrl {
+ compatible = "sandbox,pinctrl";
+
+ pinctrl_i2c0: i2c0 {
+ groups = "i2c";
+ function = "i2c";
+ bias-pull-up;
+ };
+
+ pinctrl_serial0: uart0 {
+ groups = "serial_a";
+ function = "serial";
+ };
+ };
+
spi at 0 {
#address-cells = <1>;
#size-cells = <0>;
@@ -168,6 +185,8 @@
uart0: serial {
compatible = "sandbox,serial";
sandbox,text-colour = "cyan";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_serial0>;
};
usb at 0 {
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 874a26b..85693f0 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -27,6 +27,11 @@ CONFIG_SANDBOX_SERIAL=y
CONFIG_TPM_TIS_SANDBOX=y
CONFIG_SYS_I2C_SANDBOX=y
CONFIG_SANDBOX_SPI=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_GENERIC=y
+CONFIG_PINMUX=y
+CONFIG_PINCONF=y
+CONFIG_PINCTRL_SANDBOX=y
CONFIG_SANDBOX_GPIO=y
CONFIG_DM_PMIC=y
CONFIG_DM_PMIC_SANDBOX=y
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index eca83fe..c6229d9 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -45,6 +45,9 @@ config SPL_PINCONF
if PINCTRL || SPL_PINCTRL
+config PINCTRL_SANDBOX
+ bool "Sandbox pinctrl driver"
+
endif
endmenu
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index a713c7d..35decf4 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -1,2 +1,4 @@
obj-y += pinctrl-uclass.o
obj-$(CONFIG_$(SPL_)PINCTRL_GENERIC) += pinctrl-generic.o
+
+obj-$(CONFIG_PINCTRL_SANDBOX) += pinctrl-sandbox.o
diff --git a/drivers/pinctrl/pinctrl-sandbox.c b/drivers/pinctrl/pinctrl-sandbox.c
new file mode 100644
index 0000000..1f02bf2
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-sandbox.c
@@ -0,0 +1,157 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <dm/device.h>
+#include <dm/pinctrl.h>
+
+static const char * const sandbox_pins[] = {
+ "SCL",
+ "SDA",
+ "TX",
+ "RX",
+};
+
+static const char * const sandbox_groups[] = {
+ "i2c",
+ "serial_a",
+ "serial_b",
+ "spi",
+};
+
+static const char * const sandbox_functions[] = {
+ "i2c",
+ "serial",
+ "spi",
+};
+
+static const struct pinconf_param sandbox_conf_params[] = {
+ { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
+ { "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
+ { "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
+ { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
+ { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
+ { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
+ { "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
+ { "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
+ { "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
+ { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
+ { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
+};
+
+static int sandbox_pinctrl_probe(struct udevice *dev)
+{
+ return 0;
+}
+
+static int sandbox_pinctrl_remove(struct udevice *dev)
+{
+ return 0;
+}
+
+static int sandbox_get_pins_count(struct udevice *dev)
+{
+ return ARRAY_SIZE(sandbox_pins);
+}
+
+static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
+{
+ return sandbox_pins[selector];
+}
+
+static int sandbox_get_groups_count(struct udevice *dev)
+{
+ return ARRAY_SIZE(sandbox_groups);
+}
+
+static const char *sandbox_get_group_name(struct udevice *dev,
+ unsigned selector)
+{
+ return sandbox_groups[selector];
+}
+
+static int sandbox_get_functions_count(struct udevice *dev)
+{
+ return ARRAY_SIZE(sandbox_functions);
+}
+
+static const char *sandbox_get_function_name(struct udevice *dev,
+ unsigned selector)
+{
+ return sandbox_functions[selector];
+}
+
+static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
+ unsigned func_selector)
+{
+ debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
+ pin_selector, sandbox_get_pin_name(dev, pin_selector),
+ func_selector, sandbox_get_function_name(dev, func_selector));
+
+ return 0;
+}
+
+static int sandbox_pinmux_group_set(struct udevice *dev,
+ unsigned group_selector,
+ unsigned func_selector)
+{
+ debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
+ group_selector, sandbox_get_group_name(dev, group_selector),
+ func_selector, sandbox_get_function_name(dev, func_selector));
+
+ return 0;
+}
+
+static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
+ unsigned param, unsigned argument)
+{
+ debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
+ pin_selector, sandbox_get_pin_name(dev, pin_selector),
+ param, argument);
+
+ return 0;
+}
+
+static int sandbox_pinconf_group_set(struct udevice *dev,
+ unsigned group_selector,
+ unsigned param, unsigned argument)
+{
+ debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
+ group_selector, sandbox_get_group_name(dev, group_selector),
+ param, argument);
+
+ return 0;
+}
+
+const struct pinctrl_ops sandbox_pinctrl_ops = {
+ .get_pins_count = sandbox_get_pins_count,
+ .get_pin_name = sandbox_get_pin_name,
+ .get_groups_count = sandbox_get_groups_count,
+ .get_group_name = sandbox_get_group_name,
+ .get_functions_count = sandbox_get_functions_count,
+ .get_function_name = sandbox_get_function_name,
+ .pinmux_set = sandbox_pinmux_set,
+ .pinmux_group_set = sandbox_pinmux_group_set,
+ .pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
+ .pinconf_params = sandbox_conf_params,
+ .pinconf_set = sandbox_pinconf_set,
+ .pinconf_group_set = sandbox_pinconf_group_set,
+ .set_state = pinctrl_generic_set_state,
+};
+
+static const struct udevice_id sandbox_pinctrl_match[] = {
+ { .compatible = "sandbox,pinctrl" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(sandbox_pinctrl) = {
+ .name = "sandbox_pinctrl",
+ .id = UCLASS_PINCTRL,
+ .of_match = sandbox_pinctrl_match,
+ .probe = sandbox_pinctrl_probe,
+ .remove = sandbox_pinctrl_remove,
+ .ops = &sandbox_pinctrl_ops,
+};
--
1.9.1
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