pinctrl: sandbox: add sandbox pinctrl driver
authorMasahiro Yamada <yamada.masahiro@socionext.com>
Thu, 27 Aug 2015 03:44:30 +0000 (12:44 +0900)
committerLothar Waßmann <LW@KARO-electronics.de>
Thu, 10 Sep 2015 10:19:18 +0000 (12:19 +0200)
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@10002000, eth1: eth@80000000, eth5: eth@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@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
arch/sandbox/dts/sandbox.dts
configs/sandbox_defconfig
drivers/pinctrl/Kconfig
drivers/pinctrl/Makefile
drivers/pinctrl/pinctrl-sandbox.c [new file with mode: 0644]

index 758c4a5..65b9125 100644 (file)
@@ -92,6 +92,8 @@
                reg = <0 0>;
                compatible = "sandbox,i2c";
                clock-frequency = <400000>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_i2c0>;
                eeprom@2c {
                        reg = <0x2c>;
                        compatible = "i2c-eeprom";
                };
        };
 
+       pinctrl {
+               compatible = "sandbox,pinctrl";
+
+               pinctrl_i2c0: i2c0 {
+                       groups = "i2c";
+                       function = "i2c";
+                       bias-pull-up;
+               };
+
+               pinctrl_serial0: uart0 {
+                       groups = "serial_a";
+                       function = "serial";
+               };
+       };
+
        spi@0 {
                #address-cells = <1>;
                #size-cells = <0>;
        uart0: serial {
                compatible = "sandbox,serial";
                sandbox,text-colour = "cyan";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_serial0>;
        };
 
        usb@0 {
index 4034a2e..e9e1597 100644 (file)
@@ -36,6 +36,9 @@ CONFIG_DM_TPM=y
 CONFIG_TPM_TIS_SANDBOX=y
 CONFIG_SYS_I2C_SANDBOX=y
 CONFIG_SANDBOX_SPI=y
+CONFIG_PINCTRL=y
+CONFIG_PINCONF=y
+CONFIG_PINCTRL_SANDBOX=y
 CONFIG_SANDBOX_GPIO=y
 CONFIG_DM_PMIC=y
 CONFIG_DM_PMIC_SANDBOX=y
index 6ac56eb..30b8e45 100644 (file)
@@ -96,6 +96,14 @@ config SPL_PINCONF
 
 if PINCTRL || SPL_PINCTRL
 
+config PINCTRL_SANDBOX
+       bool "Sandbox pinctrl driver"
+       depends on SANDBOX
+       help
+         This enables pinctrl driver for sandbox.  Currently, this driver
+         actually does nothing but print debug messages when pinctrl
+         operations are invoked.
+
 endif
 
 endmenu
index a713c7d..35decf4 100644 (file)
@@ -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 (file)
index 0000000..ab03d8b
--- /dev/null
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2015  Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * 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_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,
+       .ops = &sandbox_pinctrl_ops,
+};