[PATCH V3 0/4] input: keyboard: tegra: cleanups and DT supports

[PATCH V3 0/4] input: keyboard: tegra: cleanups and DT supports

[Laxman Dewangan]

This patch series:
 - fix build warning,
 - use devm_* for allocation,
 - make column/rows configuration through DT and 
 - remove the rarely used  key mapping table.

Changes from V1:
- renames the rows and pins property array.
- nit cleanups.

Changes from V2:
- remove the error checks changes from original.
- return -EBUSY when reg mapping fail.
- remove unregister_input_device() devm_* version is used.
- Pass correct argument in free_irq.

Laxman Dewangan (4):
  input: keyboard: tegra: fix build warning
  input: keyboard: tegra: use devm_* for resource allocation
  input: keyboard: tegra: add support for rows/cols configuration from
    dt
  input: keyboard: tegra: remove default key mapping

 .../bindings/input/nvidia,tegra20-kbc.txt          |   22 ++
 drivers/input/keyboard/tegra-kbc.c                 |  345 ++++++--------------
 2 files changed, 118 insertions(+), 249 deletions(-)

[PATCH V3 1/4] input: keyboard: tegra: fix build warning

[Laxman Dewangan]

Fix the following build warning when building driver with CONFIG_PM_SLEEP
not selected.

tegra-kbc.c:360:13: warning: 'tegra_kbc_set_keypress_interrupt' defined but not used [-Wunused-function]

Signed-off-by: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
Changes from V1 and V2: None

 drivers/input/keyboard/tegra-kbc.c |   24 ++++++++++++------------
 1 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index c76f968..f1d3ba0 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -357,18 +357,6 @@ static void tegra_kbc_set_fifo_interrupt(struct tegra_kbc *kbc, bool enable)
 	writel(val, kbc->mmio + KBC_CONTROL_0);
 }
 
-static void tegra_kbc_set_keypress_interrupt(struct tegra_kbc *kbc, bool enable)
-{
-	u32 val;
-
-	val = readl(kbc->mmio + KBC_CONTROL_0);
-	if (enable)
-		val |= KBC_CONTROL_KEYPRESS_INT_EN;
-	else
-		val &= ~KBC_CONTROL_KEYPRESS_INT_EN;
-	writel(val, kbc->mmio + KBC_CONTROL_0);
-}
-
 static void tegra_kbc_keypress_timer(unsigned long data)
 {
 	struct tegra_kbc *kbc = (struct tegra_kbc *)data;
@@ -866,6 +854,18 @@ static int tegra_kbc_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM_SLEEP
+static void tegra_kbc_set_keypress_interrupt(struct tegra_kbc *kbc, bool enable)
+{
+	u32 val;
+
+	val = readl(kbc->mmio + KBC_CONTROL_0);
+	if (enable)
+		val |= KBC_CONTROL_KEYPRESS_INT_EN;
+	else
+		val &= ~KBC_CONTROL_KEYPRESS_INT_EN;
+	writel(val, kbc->mmio + KBC_CONTROL_0);
+}
+
 static int tegra_kbc_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
-- 
1.7.1.1

[PATCH V3 2/4] input: keyboard: tegra: use devm_* for resource allocation

[Laxman Dewangan]

Use devm_* for memory, clock, input device allocation. This reduces
code for freeing these resources.

Signed-off-by: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
Changes from V1: None
Changes from V2:
- remove the error checks changes from original.
- return -EBUSY when reg mapping fail.
- remove unregister_input_device() devm_* version is used.
- Pass correct argument in free_irq.

 drivers/input/keyboard/tegra-kbc.c |   92 +++++++++++-------------------------
 1 files changed, 27 insertions(+), 65 deletions(-)

diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index f1d3ba0..e2fdf9d 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -618,7 +618,7 @@ static struct tegra_kbc_platform_data *tegra_kbc_dt_parse_pdata(
 	if (!np)
 		return NULL;
 
-	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
 		return NULL;
 
@@ -700,33 +700,36 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 	if (!pdata)
 		pdata = tegra_kbc_dt_parse_pdata(pdev);
 
-	if (!pdata)
+	if (!pdata) {
+		dev_err(&pdev->dev, "Platform data missing\n");
 		return -EINVAL;
-
-	if (!tegra_kbc_check_pin_cfg(pdata, &pdev->dev, &num_rows)) {
-		err = -EINVAL;
-		goto err_free_pdata;
 	}
 
+	if (!tegra_kbc_check_pin_cfg(pdata, &pdev->dev, &num_rows))
+		return -EINVAL;
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(&pdev->dev, "failed to get I/O memory\n");
-		err = -ENXIO;
-		goto err_free_pdata;
+		return -ENXIO;
 	}
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(&pdev->dev, "failed to get keyboard IRQ\n");
-		err = -ENXIO;
-		goto err_free_pdata;
+		return -ENXIO;
+	}
+
+	kbc = devm_kzalloc(&pdev->dev, sizeof(*kbc), GFP_KERNEL);
+	if (!kbc) {
+		dev_err(&pdev->dev, "failed to alloc memory for kbc\n");
+		return -ENOMEM;
 	}
 
-	kbc = kzalloc(sizeof(*kbc), GFP_KERNEL);
-	input_dev = input_allocate_device();
-	if (!kbc || !input_dev) {
-		err = -ENOMEM;
-		goto err_free_mem;
+	input_dev = devm_input_allocate_device(&pdev->dev);
+	if (!input_dev) {
+		dev_err(&pdev->dev, "failed to allocate input device\n");
+		return -ENOMEM;
 	}
 
 	kbc->pdata = pdata;
@@ -735,25 +738,16 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 	spin_lock_init(&kbc->lock);
 	setup_timer(&kbc->timer, tegra_kbc_keypress_timer, (unsigned long)kbc);
 
-	res = request_mem_region(res->start, resource_size(res), pdev->name);
-	if (!res) {
-		dev_err(&pdev->dev, "failed to request I/O memory\n");
-		err = -EBUSY;
-		goto err_free_mem;
-	}
-
-	kbc->mmio = ioremap(res->start, resource_size(res));
+	kbc->mmio = devm_request_and_ioremap(&pdev->dev, res);
 	if (!kbc->mmio) {
-		dev_err(&pdev->dev, "failed to remap I/O memory\n");
-		err = -ENXIO;
-		goto err_free_mem_region;
+		dev_err(&pdev->dev, "Cannot request memregion/iomap address\n");
+		return -EBUSY;
 	}
 
-	kbc->clk = clk_get(&pdev->dev, NULL);
+	kbc->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(kbc->clk)) {
 		dev_err(&pdev->dev, "failed to get keyboard clock\n");
-		err = PTR_ERR(kbc->clk);
-		goto err_iounmap;
+		return PTR_ERR(kbc->clk);
 	}
 
 	/*
@@ -780,7 +774,7 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 	err = tegra_kbd_setup_keymap(kbc);
 	if (err) {
 		dev_err(&pdev->dev, "failed to setup keymap\n");
-		goto err_put_clk;
+		return err;
 	}
 
 	__set_bit(EV_REP, input_dev->evbit);
@@ -792,7 +786,7 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 			  IRQF_NO_SUSPEND | IRQF_TRIGGER_HIGH, pdev->name, kbc);
 	if (err) {
 		dev_err(&pdev->dev, "failed to request keyboard IRQ\n");
-		goto err_put_clk;
+		return err;
 	}
 
 	disable_irq(kbc->irq);
@@ -809,47 +803,15 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 	return 0;
 
 err_free_irq:
-	free_irq(kbc->irq, pdev);
-err_put_clk:
-	clk_put(kbc->clk);
-err_iounmap:
-	iounmap(kbc->mmio);
-err_free_mem_region:
-	release_mem_region(res->start, resource_size(res));
-err_free_mem:
-	input_free_device(input_dev);
-	kfree(kbc);
-err_free_pdata:
-	if (!pdev->dev.platform_data)
-		kfree(pdata);
-
+	free_irq(kbc->irq, kbc);
 	return err;
 }
 
 static int tegra_kbc_remove(struct platform_device *pdev)
 {
 	struct tegra_kbc *kbc = platform_get_drvdata(pdev);
-	struct resource *res;
-
-	platform_set_drvdata(pdev, NULL);
-
-	free_irq(kbc->irq, pdev);
-	clk_put(kbc->clk);
-
-	input_unregister_device(kbc->idev);
-	iounmap(kbc->mmio);
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(res->start, resource_size(res));
-
-	/*
-	 * If we do not have platform data attached to the device we
-	 * allocated it ourselves and thus need to free it.
-	 */
-	if (!pdev->dev.platform_data)
-		kfree(kbc->pdata);
-
-	kfree(kbc);
 
+	free_irq(kbc->irq, kbc);
 	return 0;
 }
 
-- 
1.7.1.1

[PATCH V3 3/4] input: keyboard: tegra: add support for rows/cols configuration from dt

[Laxman Dewangan]

The NVIDIA's Tegra KBC has maximum 24 pins to make matrix keypad.
Any pin can be configured as row or column. The maximum column pin
can be 8 and maximum row pin can be 16.

Remove the assumption that all first 16 pins will be used as row
and remaining as columns and Add the property for configuring pins
to either row or column from DT. Update the devicetree binding
document accordingly.

Signed-off-by: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
Changes from V1:
- renames the rows and pins property array.
- nit cleanups.
Changes from V2:
 None

 .../bindings/input/nvidia,tegra20-kbc.txt          |   22 ++++++
 drivers/input/keyboard/tegra-kbc.c                 |   74 +++++++++++++++-----
 2 files changed, 79 insertions(+), 17 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
index 72683be..2995fae 100644
--- a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
+++ b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
@@ -1,7 +1,18 @@
 * Tegra keyboard controller
+The key controller has maximum 24 pins to make matrix keypad. Any pin
+can be configured as row or column. The maximum column pin can be 8
+and maximum row pins can be 16 for Tegra20/Tegra30.
 
 Required properties:
 - compatible: "nvidia,tegra20-kbc"
+- reg: Register base address of KBC.
+- interrupts: Interrupt number for the KBC.
+- nvidia,kbc-row-pins: The KBC pins which are configured as row. This is an
+  array of pin numbers which is used as rows.
+- nvidia,kbc-col-pins: The KBC pins which are configured as column. This is an
+  array of pin numbers which is used as column.
+- linux,keymap: The keymap for keys as described in the binding document
+  devicetree/bindings/input/matrix-keymap.txt.
 
 Optional properties, in addition to those specified by the shared
 matrix-keyboard bindings:
@@ -19,5 +30,16 @@ Example:
 keyboard: keyboard {
 	compatible = "nvidia,tegra20-kbc";
 	reg = <0x7000e200 0x100>;
+	interrupts = <0 85 0x04>;
 	nvidia,ghost-filter;
+	nvidia,debounce-delay-ms = <640>;
+	nvidia,kbc-row-pins = <0 1 2>;    /* pin 0, 1, 2 as rows */
+	nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */
+	linux,keymap = <0x00000074
+			0x00010067
+			0x00020066
+			0x01010068
+			0x02000069
+			0x02010070
+			0x02020071>;
 };
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index e2fdf9d..eeb9dbc 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -614,13 +614,16 @@ static struct tegra_kbc_platform_data *tegra_kbc_dt_parse_pdata(
 	struct device_node *np = pdev->dev.of_node;
 	u32 prop;
 	int i;
-
-	if (!np)
-		return NULL;
+	u32 num_rows = 0;
+	u32 num_cols = 0;
+	u32 cols_cfg[KBC_MAX_GPIO];
+	u32 rows_cfg[KBC_MAX_GPIO];
+	int proplen;
+	int ret;
 
 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	if (!of_property_read_u32(np, "nvidia,debounce-delay-ms", &prop))
 		pdata->debounce_cnt = prop;
@@ -634,18 +637,55 @@ static struct tegra_kbc_platform_data *tegra_kbc_dt_parse_pdata(
 	if (of_find_property(np, "nvidia,wakeup-source", NULL))
 		pdata->wakeup = true;
 
-	/*
-	 * All currently known keymaps with device tree support use the same
-	 * pin_cfg, so set it up here.
-	 */
-	for (i = 0; i < KBC_MAX_ROW; i++) {
-		pdata->pin_cfg[i].num = i;
-		pdata->pin_cfg[i].type = PIN_CFG_ROW;
+	if (!of_get_property(np, "nvidia,kbc-row-pins", &proplen)) {
+		dev_err(&pdev->dev, "property nvidia,kbc-row-pins not found\n");
+		return ERR_PTR(-ENOENT);
+	}
+	num_rows = proplen / sizeof(u32);
+
+	if (!of_get_property(np, "nvidia,kbc-col-pins", &proplen)) {
+		dev_err(&pdev->dev, "property nvidia,kbc-col-pins not found\n");
+		return ERR_PTR(-ENOENT);
+	}
+	num_cols = proplen / sizeof(u32);
+
+	if (!of_get_property(np, "linux,keymap", &proplen)) {
+		dev_err(&pdev->dev, "property linux,keymap not found\n");
+		return ERR_PTR(-ENOENT);
+	}
+
+	if (!num_rows || !num_cols || ((num_rows + num_cols) > KBC_MAX_GPIO)) {
+		dev_err(&pdev->dev,
+			"keypad rows/columns not porperly specified\n");
+		return ERR_PTR(-EINVAL);
 	}
 
-	for (i = 0; i < KBC_MAX_COL; i++) {
-		pdata->pin_cfg[KBC_MAX_ROW + i].num = i;
-		pdata->pin_cfg[KBC_MAX_ROW + i].type = PIN_CFG_COL;
+	/* Set all pins as non-configured */
+	for (i = 0; i < KBC_MAX_GPIO; i++)
+		pdata->pin_cfg[i].type = PIN_CFG_IGNORE;
+
+	ret = of_property_read_u32_array(np, "nvidia,kbc-row-pins",
+				rows_cfg, num_rows);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Rows configurations are not proper\n");
+		return ERR_PTR(-ENOENT);
+	}
+
+	ret = of_property_read_u32_array(np, "nvidia,kbc-col-pins",
+				cols_cfg, num_cols);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Cols configurations are not proper\n");
+		return ERR_PTR(-ENOENT);
+	}
+
+	for (i = 0; i < num_rows; i++) {
+		pdata->pin_cfg[rows_cfg[i]].type = PIN_CFG_ROW;
+		pdata->pin_cfg[rows_cfg[i]].num = i;
+	}
+
+	for (i = 0; i < num_cols; i++) {
+		pdata->pin_cfg[cols_cfg[i]].type = PIN_CFG_COL;
+		pdata->pin_cfg[cols_cfg[i]].num = i;
 	}
 
 	return pdata;
@@ -697,12 +737,12 @@ static int tegra_kbc_probe(struct platform_device *pdev)
 	unsigned int debounce_cnt;
 	unsigned int scan_time_rows;
 
-	if (!pdata)
+	if (!pdata && pdev->dev.of_node)
 		pdata = tegra_kbc_dt_parse_pdata(pdev);
 
-	if (!pdata) {
+	if (IS_ERR_OR_NULL(pdata)) {
 		dev_err(&pdev->dev, "Platform data missing\n");
-		return -EINVAL;
+		return pdata ? PTR_ERR(pdata) : -EINVAL;
 	}
 
 	if (!tegra_kbc_check_pin_cfg(pdata, &pdev->dev, &num_rows))
-- 
1.7.1.1

[PATCH V3 4/4] input: keyboard: tegra: remove default key mapping

[Laxman Dewangan]

Tegra KBC driver have the default key mapping for 16x8 configuration.
The key mapping can be provided through platform data or through DT
and the mapping varies from platform to platform, hence this default
mapping is not so useful. Remove the default mapping to reduce the code
lines of the driver.

Signed-off-by: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
Changes from V1 and V2: None.

 drivers/input/keyboard/tegra-kbc.c |  156 +-----------------------------------
 1 files changed, 1 insertions(+), 155 deletions(-)

diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index eeb9dbc..5d5b227 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -87,147 +87,6 @@ struct tegra_kbc {
 	struct clk *clk;
 };
 
-static const u32 tegra_kbc_default_keymap[] = {
-	KEY(0, 2, KEY_W),
-	KEY(0, 3, KEY_S),
-	KEY(0, 4, KEY_A),
-	KEY(0, 5, KEY_Z),
-	KEY(0, 7, KEY_FN),
-
-	KEY(1, 7, KEY_LEFTMETA),
-
-	KEY(2, 6, KEY_RIGHTALT),
-	KEY(2, 7, KEY_LEFTALT),
-
-	KEY(3, 0, KEY_5),
-	KEY(3, 1, KEY_4),
-	KEY(3, 2, KEY_R),
-	KEY(3, 3, KEY_E),
-	KEY(3, 4, KEY_F),
-	KEY(3, 5, KEY_D),
-	KEY(3, 6, KEY_X),
-
-	KEY(4, 0, KEY_7),
-	KEY(4, 1, KEY_6),
-	KEY(4, 2, KEY_T),
-	KEY(4, 3, KEY_H),
-	KEY(4, 4, KEY_G),
-	KEY(4, 5, KEY_V),
-	KEY(4, 6, KEY_C),
-	KEY(4, 7, KEY_SPACE),
-
-	KEY(5, 0, KEY_9),
-	KEY(5, 1, KEY_8),
-	KEY(5, 2, KEY_U),
-	KEY(5, 3, KEY_Y),
-	KEY(5, 4, KEY_J),
-	KEY(5, 5, KEY_N),
-	KEY(5, 6, KEY_B),
-	KEY(5, 7, KEY_BACKSLASH),
-
-	KEY(6, 0, KEY_MINUS),
-	KEY(6, 1, KEY_0),
-	KEY(6, 2, KEY_O),
-	KEY(6, 3, KEY_I),
-	KEY(6, 4, KEY_L),
-	KEY(6, 5, KEY_K),
-	KEY(6, 6, KEY_COMMA),
-	KEY(6, 7, KEY_M),
-
-	KEY(7, 1, KEY_EQUAL),
-	KEY(7, 2, KEY_RIGHTBRACE),
-	KEY(7, 3, KEY_ENTER),
-	KEY(7, 7, KEY_MENU),
-
-	KEY(8, 4, KEY_RIGHTSHIFT),
-	KEY(8, 5, KEY_LEFTSHIFT),
-
-	KEY(9, 5, KEY_RIGHTCTRL),
-	KEY(9, 7, KEY_LEFTCTRL),
-
-	KEY(11, 0, KEY_LEFTBRACE),
-	KEY(11, 1, KEY_P),
-	KEY(11, 2, KEY_APOSTROPHE),
-	KEY(11, 3, KEY_SEMICOLON),
-	KEY(11, 4, KEY_SLASH),
-	KEY(11, 5, KEY_DOT),
-
-	KEY(12, 0, KEY_F10),
-	KEY(12, 1, KEY_F9),
-	KEY(12, 2, KEY_BACKSPACE),
-	KEY(12, 3, KEY_3),
-	KEY(12, 4, KEY_2),
-	KEY(12, 5, KEY_UP),
-	KEY(12, 6, KEY_PRINT),
-	KEY(12, 7, KEY_PAUSE),
-
-	KEY(13, 0, KEY_INSERT),
-	KEY(13, 1, KEY_DELETE),
-	KEY(13, 3, KEY_PAGEUP),
-	KEY(13, 4, KEY_PAGEDOWN),
-	KEY(13, 5, KEY_RIGHT),
-	KEY(13, 6, KEY_DOWN),
-	KEY(13, 7, KEY_LEFT),
-
-	KEY(14, 0, KEY_F11),
-	KEY(14, 1, KEY_F12),
-	KEY(14, 2, KEY_F8),
-	KEY(14, 3, KEY_Q),
-	KEY(14, 4, KEY_F4),
-	KEY(14, 5, KEY_F3),
-	KEY(14, 6, KEY_1),
-	KEY(14, 7, KEY_F7),
-
-	KEY(15, 0, KEY_ESC),
-	KEY(15, 1, KEY_GRAVE),
-	KEY(15, 2, KEY_F5),
-	KEY(15, 3, KEY_TAB),
-	KEY(15, 4, KEY_F1),
-	KEY(15, 5, KEY_F2),
-	KEY(15, 6, KEY_CAPSLOCK),
-	KEY(15, 7, KEY_F6),
-
-	/* Software Handled Function Keys */
-	KEY(20, 0, KEY_KP7),
-
-	KEY(21, 0, KEY_KP9),
-	KEY(21, 1, KEY_KP8),
-	KEY(21, 2, KEY_KP4),
-	KEY(21, 4, KEY_KP1),
-
-	KEY(22, 1, KEY_KPSLASH),
-	KEY(22, 2, KEY_KP6),
-	KEY(22, 3, KEY_KP5),
-	KEY(22, 4, KEY_KP3),
-	KEY(22, 5, KEY_KP2),
-	KEY(22, 7, KEY_KP0),
-
-	KEY(27, 1, KEY_KPASTERISK),
-	KEY(27, 3, KEY_KPMINUS),
-	KEY(27, 4, KEY_KPPLUS),
-	KEY(27, 5, KEY_KPDOT),
-
-	KEY(28, 5, KEY_VOLUMEUP),
-
-	KEY(29, 3, KEY_HOME),
-	KEY(29, 4, KEY_END),
-	KEY(29, 5, KEY_BRIGHTNESSDOWN),
-	KEY(29, 6, KEY_VOLUMEDOWN),
-	KEY(29, 7, KEY_BRIGHTNESSUP),
-
-	KEY(30, 0, KEY_NUMLOCK),
-	KEY(30, 1, KEY_SCROLLLOCK),
-	KEY(30, 2, KEY_MUTE),
-
-	KEY(31, 4, KEY_HELP),
-};
-
-static const
-struct matrix_keymap_data tegra_kbc_default_keymap_data = {
-	.keymap		= tegra_kbc_default_keymap,
-	.keymap_size	= ARRAY_SIZE(tegra_kbc_default_keymap),
-};
-
 static void tegra_kbc_report_released_keys(struct input_dev *input,
 					   unsigned short old_keycodes[],
 					   unsigned int old_num_keys,
@@ -703,26 +562,13 @@ static int tegra_kbd_setup_keymap(struct tegra_kbc *kbc)
 	const struct tegra_kbc_platform_data *pdata = kbc->pdata;
 	const struct matrix_keymap_data *keymap_data = pdata->keymap_data;
 	unsigned int keymap_rows = KBC_MAX_KEY;
-	int retval;
 
 	if (keymap_data && pdata->use_fn_map)
 		keymap_rows *= 2;
 
-	retval = matrix_keypad_build_keymap(keymap_data, NULL,
+	return matrix_keypad_build_keymap(keymap_data, NULL,
 					    keymap_rows, KBC_MAX_COL,
 					    kbc->keycode, kbc->idev);
-	if (retval == -ENOSYS || retval == -ENOENT) {
-		/*
-		 * If there is no OF support in kernel or keymap
-		 * property is missing, use default keymap.
-		 */
-		retval = matrix_keypad_build_keymap(
-					&tegra_kbc_default_keymap_data, NULL,
-					keymap_rows, KBC_MAX_COL,
-					kbc->keycode, kbc->idev);
-	}
-
-	return retval;
 }
 
 static int tegra_kbc_probe(struct platform_device *pdev)
-- 
1.7.1.1