test: pinmux: add test for 'pinctrl-single' driver

The test adds two pinmux nodes to the device tree, one to test when a
register changes only one pin's mux (pinctrl-single,pins), and the other
to test when more than one pin's mux is changed (pinctrl-single,bits).
This required replacing the controller's register access functions when
the driver is used on sandbox.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/sandbox/dts/test.dts

@@ -569,6 +569,9 @@
 		reg = <0 1>;
 		compatible = "sandbox,i2c";
 		clock-frequency = <100000>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinmux_i2c0_pins>;
+
 		eeprom@2c {
 			reg = <0x2c>;
 			compatible = "i2c-eeprom";
@@ -649,6 +652,8 @@
 	lcd {
 		u-boot,dm-pre-reloc;
 		compatible = "sandbox,lcd-sdl";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinmux_lcd_pins>;
 		xres = <1366>;
 		yres = <768>;
 	};
@@ -899,6 +904,8 @@
 	pwm: pwm {
 		compatible = "sandbox,pwm";
 		#pwm-cells = <2>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinmux_pwm_pins>;
 	};
 
 	pwm2 {
@@ -970,6 +977,9 @@
 		reg = <0 1>;
 		compatible = "sandbox,spi";
 		cs-gpios = <0>, <0>, <&gpio_a 0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinmux_spi0_pins>;
+
 		spi.bin@0 {
 			reg = <0>;
 			compatible = "spansion,m25p16", "jedec,spi-nor";
@@ -1059,6 +1069,8 @@
 	uart0: serial {
 		compatible = "sandbox,serial";
 		u-boot,dm-pre-reloc;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinmux_uart0_pins>;
 	};
 
 	usb_0: usb@0 {
@@ -1325,6 +1337,66 @@
 		};
 	};
 
+	pinctrl-single-no-width {
+		compatible = "pinctrl-single";
+		reg = <0x0000 0x238>;
+		#pinctrl-cells = <1>;
+		pinctrl-single,function-mask = <0x7f>;
+	};
+
+	pinctrl-single-pins {
+		compatible = "pinctrl-single";
+		reg = <0x0000 0x238>;
+		#pinctrl-cells = <1>;
+		pinctrl-single,register-width = <32>;
+		pinctrl-single,function-mask = <0x7f>;
+
+		pinmux_pwm_pins: pinmux_pwm_pins {
+			pinctrl-single,pins = < 0x48 0x06 >;
+		};
+
+		pinmux_spi0_pins: pinmux_spi0_pins {
+			pinctrl-single,pins = <
+				0x190 0x0c
+				0x194 0x0c
+				0x198 0x23
+				0x19c 0x0c
+			>;
+		};
+
+		pinmux_uart0_pins: pinmux_uart0_pins {
+			pinctrl-single,pins = <
+				0x70 0x30
+				0x74 0x00
+			>;
+		};
+	};
+
+	pinctrl-single-bits {
+		compatible = "pinctrl-single";
+		reg = <0x0000 0x50>;
+		#pinctrl-cells = <2>;
+		pinctrl-single,bit-per-mux;
+		pinctrl-single,register-width = <32>;
+		pinctrl-single,function-mask = <0xf>;
+
+		pinmux_i2c0_pins: pinmux_i2c0_pins {
+			pinctrl-single,bits = <
+				0x10 0x00002200 0x0000ff00
+			>;
+		};
+
+		pinmux_lcd_pins: pinmux_lcd_pins {
+			pinctrl-single,bits = <
+				0x40 0x22222200 0xffffff00
+				0x44 0x22222222 0xffffffff
+				0x48 0x00000022 0x000000ff
+				0x48 0x02000000 0x0f000000
+				0x4c 0x02000022 0x0f0000ff
+			>;
+		};
+	};
+
 	hwspinlock@0 {
 		compatible = "sandbox,hwspinlock";
 	};

configs/sandbox_defconfig

@@ -197,6 +197,7 @@ CONFIG_PHY_SANDBOX=y
 CONFIG_PINCTRL=y
 CONFIG_PINCONF=y
 CONFIG_PINCTRL_SANDBOX=y
+CONFIG_PINCTRL_SINGLE=y
 CONFIG_POWER_DOMAIN=y
 CONFIG_SANDBOX_POWER_DOMAIN=y
 CONFIG_DM_PMIC=y

configs/sandbox_flattree_defconfig

@@ -142,6 +142,7 @@ CONFIG_PHY_SANDBOX=y
 CONFIG_PINCTRL=y
 CONFIG_PINCONF=y
 CONFIG_PINCTRL_SANDBOX=y
+CONFIG_PINCTRL_SINGLE=y
 CONFIG_POWER_DOMAIN=y
 CONFIG_SANDBOX_POWER_DOMAIN=y
 CONFIG_DM_PMIC=y

drivers/pinctrl/pinctrl-single.c

@@ -51,6 +51,9 @@ struct single_func {
  * @pin_name: temporary buffer to store the pin name
  */
 struct single_priv {
+#if (IS_ENABLED(CONFIG_SANDBOX))
+	u32 *sandbox_regs;
+#endif
 	unsigned int bits_per_pin;
 	unsigned int npins;
 	char pin_name[PINNAME_SIZE];
@@ -87,6 +90,8 @@ struct single_fdt_bits_cfg {
 	fdt32_t mask;
 };
 
+#if (!IS_ENABLED(CONFIG_SANDBOX))
+
 static unsigned int single_read(struct udevice *dev, fdt_addr_t reg)
 {
 	struct single_pdata *pdata = dev_get_plat(dev);
@@ -119,6 +124,24 @@ static void single_write(struct udevice *dev, unsigned int val, fdt_addr_t reg)
 	}
 }
 
+#else /* CONFIG_SANDBOX  */
+
+static unsigned int single_read(struct udevice *dev, fdt_addr_t reg)
+{
+	struct single_priv *priv = dev_get_priv(dev);
+
+	return priv->sandbox_regs[reg];
+}
+
+static void single_write(struct udevice *dev, unsigned int val, fdt_addr_t reg)
+{
+	struct single_priv *priv = dev_get_priv(dev);
+
+	priv->sandbox_regs[reg] = val;
+}
+
+#endif /* CONFIG_SANDBOX  */
+
 /**
  * single_get_pin_by_offset() - get a pin based on the register offset
  * @dev: single driver instance
@@ -436,6 +459,14 @@ static int single_probe(struct udevice *dev)
 	INIT_LIST_HEAD(&priv->functions);
 
 	size = pdata->offset + pdata->width / BITS_PER_BYTE;
+	#if (CONFIG_IS_ENABLED(SANDBOX))
+	priv->sandbox_regs =
+		devm_kzalloc(dev, size * sizeof(*priv->sandbox_regs),
+			     GFP_KERNEL);
+	if (!priv->sandbox_regs)
+		return -ENOMEM;
+	#endif
+
 	priv->npins = size / (pdata->width / BITS_PER_BYTE);
 	if (pdata->bits_per_mux) {
 		priv->bits_per_pin = fls(pdata->mask);

test/dm/pinmux.c

@@ -9,16 +9,21 @@
 #include <dm/test.h>
 #include <test/ut.h>
 
-static int dm_test_pinmux(struct unit_test_state *uts)
+static char buf[64];
-{
-	char buf[64];
-	struct udevice *dev;
-
 #define test_muxing(selector, expected) do { \
 	ut_assertok(pinctrl_get_pin_muxing(dev, selector, buf, sizeof(buf))); \
 	ut_asserteq_str(expected, (char *)&buf); \
 } while (0)
 
+#define test_name(selector, expected) do { \
+	ut_assertok(pinctrl_get_pin_name(dev, selector, buf, sizeof(buf))); \
+	ut_asserteq_str(expected, (char *)&buf); \
+} while (0)
+
+static int dm_test_pinmux(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+
 	ut_assertok(uclass_get_device_by_name(UCLASS_PINCTRL, "pinctrl", &dev));
 	test_muxing(0, "UART TX.");
 	test_muxing(1, "UART RX.");
@@ -54,4 +59,80 @@ static int dm_test_pinmux(struct unit_test_state *uts)
 
 	return 0;
 }
+
 DM_TEST(dm_test_pinmux, UT_TESTF_SCAN_FDT);
+
+static int dm_test_pinctrl_single(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_get_device_by_name(UCLASS_PINCTRL,
+					"pinctrl-single-no-width", &dev);
+	ut_asserteq(-EINVAL, ret);
+	ut_assertok(uclass_get_device_by_name(UCLASS_PWM, "pwm", &dev));
+	ut_assertok(uclass_get_device_by_name(UCLASS_SERIAL, "serial", &dev));
+	ut_assertok(uclass_get_device_by_name(UCLASS_SPI, "spi@0", &dev));
+	ut_assertok(uclass_get_device_by_name(UCLASS_PINCTRL,
+					      "pinctrl-single-pins", &dev));
+	ut_asserteq(142, pinctrl_get_pins_count(dev));
+	test_name(0, "PIN0");
+	test_name(141, "PIN141");
+	test_name(142, "Error");
+	test_muxing(0, "0x00000000 0x00000000 UNCLAIMED");
+	test_muxing(18, "0x00000048 0x00000006 pinmux_pwm_pins");
+	test_muxing(28, "0x00000070 0x00000030 pinmux_uart0_pins");
+	test_muxing(29, "0x00000074 0x00000000 pinmux_uart0_pins");
+	test_muxing(100, "0x00000190 0x0000000c pinmux_spi0_pins");
+	test_muxing(101, "0x00000194 0x0000000c pinmux_spi0_pins");
+	test_muxing(102, "0x00000198 0x00000023 pinmux_spi0_pins");
+	test_muxing(103, "0x0000019c 0x0000000c pinmux_spi0_pins");
+	ret = pinctrl_get_pin_muxing(dev, 142, buf, sizeof(buf));
+	ut_asserteq(-EINVAL, ret);
+	ut_assertok(uclass_get_device_by_name(UCLASS_I2C, "i2c@0", &dev));
+	ut_assertok(uclass_get_device_by_name(UCLASS_VIDEO, "lcd", &dev));
+	ut_assertok(uclass_get_device_by_name(UCLASS_PINCTRL,
+					      "pinctrl-single-bits", &dev));
+	ut_asserteq(160, pinctrl_get_pins_count(dev));
+	test_name(0, "PIN0");
+	test_name(159, "PIN159");
+	test_name(160, "Error");
+	test_muxing(0, "0x00000000 0x00000000 UNCLAIMED");
+	test_muxing(34, "0x00000010 0x00000200 pinmux_i2c0_pins");
+	test_muxing(35, "0x00000010 0x00002000 pinmux_i2c0_pins");
+	test_muxing(130, "0x00000040 0x00000200 pinmux_lcd_pins");
+	test_muxing(131, "0x00000040 0x00002000 pinmux_lcd_pins");
+	test_muxing(132, "0x00000040 0x00020000 pinmux_lcd_pins");
+	test_muxing(133, "0x00000040 0x00200000 pinmux_lcd_pins");
+	test_muxing(134, "0x00000040 0x02000000 pinmux_lcd_pins");
+	test_muxing(135, "0x00000040 0x20000000 pinmux_lcd_pins");
+	test_muxing(136, "0x00000044 0x00000002 pinmux_lcd_pins");
+	test_muxing(137, "0x00000044 0x00000020 pinmux_lcd_pins");
+	test_muxing(138, "0x00000044 0x00000200 pinmux_lcd_pins");
+	test_muxing(139, "0x00000044 0x00002000 pinmux_lcd_pins");
+	test_muxing(140, "0x00000044 0x00020000 pinmux_lcd_pins");
+	test_muxing(141, "0x00000044 0x00200000 pinmux_lcd_pins");
+	test_muxing(142, "0x00000044 0x02000000 pinmux_lcd_pins");
+	test_muxing(143, "0x00000044 0x20000000 pinmux_lcd_pins");
+	test_muxing(144, "0x00000048 0x00000002 pinmux_lcd_pins");
+	test_muxing(145, "0x00000048 0x00000020 pinmux_lcd_pins");
+	test_muxing(146, "0x00000048 0x00000000 UNCLAIMED");
+	test_muxing(147, "0x00000048 0x00000000 UNCLAIMED");
+	test_muxing(148, "0x00000048 0x00000000 UNCLAIMED");
+	test_muxing(149, "0x00000048 0x00000000 UNCLAIMED");
+	test_muxing(150, "0x00000048 0x02000000 pinmux_lcd_pins");
+	test_muxing(151, "0x00000048 0x00000000 UNCLAIMED");
+	test_muxing(152, "0x0000004c 0x00000002 pinmux_lcd_pins");
+	test_muxing(153, "0x0000004c 0x00000020 pinmux_lcd_pins");
+	test_muxing(154, "0x0000004c 0x00000000 UNCLAIMED");
+	test_muxing(155, "0x0000004c 0x00000000 UNCLAIMED");
+	test_muxing(156, "0x0000004c 0x00000000 UNCLAIMED");
+	test_muxing(157, "0x0000004c 0x00000000 UNCLAIMED");
+	test_muxing(158, "0x0000004c 0x02000000 pinmux_lcd_pins");
+	test_muxing(159, "0x0000004c 0x00000000 UNCLAIMED");
+	ret = pinctrl_get_pin_muxing(dev, 160, buf, sizeof(buf));
+	ut_asserteq(-EINVAL, ret);
+	return 0;
+}
+
+DM_TEST(dm_test_pinctrl_single, UT_TESTF_SCAN_FDT);