Input: tegra-kbc - revise device tree support

This is an incremental patch updating to the revised bindings for
matrix keyboards.

This includes an optional "linux,fn-keymap" binding that is not yet
implemented, that will be used to specify the Fn-key modifier layout
if needed.

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

2 files changed, 27 insertions, 11 deletions

diff --git a/Documentation/devicetree/bindings/input/tegra-kbc.txt b/Documentation/devicetree/bindings/input/tegra-kbc.txt
index 5ecfa99089b4..72683be6de35 100644
--- a/Documentation/devicetree/bindings/input/tegra-kbc.txt
+++ b/Documentation/devicetree/bindings/input/tegra-kbc.txt
@@ -3,16 +3,21 @@
 Required properties:
 - compatible: "nvidia,tegra20-kbc"
 
-Optional properties:
-- debounce-delay: delay in milliseconds per row scan for debouncing
-- repeat-delay: delay in milliseconds before repeat starts
-- ghost-filter: enable ghost filtering for this device
-- wakeup-source: configure keyboard as a wakeup source for suspend/resume
+Optional properties, in addition to those specified by the shared
+matrix-keyboard bindings:
+
+- linux,fn-keymap: a second keymap, same specification as the
+  matrix-keyboard-controller spec but to be used when the KEY_FN modifier
+  key is pressed.
+- nvidia,debounce-delay-ms: delay in milliseconds per row scan for debouncing
+- nvidia,repeat-delay-ms: delay in milliseconds before repeat starts
+- nvidia,ghost-filter: enable ghost filtering for this device
+- nvidia,wakeup-source: configure keyboard as a wakeup source for suspend/resume
 
 Example:
 
 keyboard: keyboard {
         compatible = "nvidia,tegra20-kbc";
         reg = <0x7000e200 0x100>;
-        ghost-filter;
+        nvidia,ghost-filter;
 };
diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c
index dc19432c665b..21c42f852343 100644
--- a/drivers/input/keyboard/tegra-kbc.c
+++ b/drivers/input/keyboard/tegra-kbc.c
@@ -624,6 +624,8 @@ tegra_kbc_dt_parse_pdata(struct platform_device *pdev)
 {
         struct tegra_kbc_platform_data *pdata;
         struct device_node *np = pdev->dev.of_node;
+        u32 prop;
+        int i;
 
         if (!np)
                 return NULL;
@@ -631,16 +633,16 @@ tegra_kbc_dt_parse_pdata(struct platform_device *pdev)
         if (!pdata)
                 return NULL;
 
-        if (!of_property_read_u32(np, "debounce-delay", &prop))
+        if (!of_property_read_u32(np, "nvidia,debounce-delay-ms", &prop))
                 pdata->debounce_cnt = prop;
 
-        if (!of_property_read_u32(np, "repeat-delay", &prop))
+        if (!of_property_read_u32(np, "nvidia,repeat-delay-ms", &prop))
                 pdata->repeat_cnt = prop;
 
-        if (of_find_property(np, "needs-ghost-filter", NULL))
+        if (of_find_property(np, "nvidia,needs-ghost-filter", NULL))
                 pdata->use_ghost_filter = true;
 
-        if (of_find_property(np, "wakeup-source", NULL))
+        if (of_find_property(np, "nvidia,wakeup-source", NULL))
                 pdata->wakeup = true;
 
         /*
@@ -657,6 +659,10 @@ tegra_kbc_dt_parse_pdata(struct platform_device *pdev)
                 pdata->pin_cfg[KBC_MAX_ROW + i].type = PIN_CFG_COL;
         }
 
+        pdata->keymap_data = matrix_keyboard_of_fill_keymap(np, "linux,keymap");
+
+        /* FIXME: Add handling of linux,fn-keymap here */
+
         return pdata;
 }
 #else
@@ -792,6 +798,9 @@ static int __devinit tegra_kbc_probe(struct platform_device *pdev)
         platform_set_drvdata(pdev, kbc);
         device_init_wakeup(&pdev->dev, pdata->wakeup);
 
+        if (!pdev->dev.platform_data)
+                matrix_keyboard_of_free_keymap(pdata->keymap_data);
+
         return 0;
 
 err_free_irq:
@@ -806,8 +815,10 @@ err_free_mem:
         input_free_device(input_dev);
         kfree(kbc);
 err_free_pdata:
-        if (!pdev->dev.platform_data)
+        if (!pdev->dev.platform_data) {
+                matrix_keyboard_of_free_keymap(pdata->keymap_data);
                 kfree(pdata);
+        }
 
         return err;
 }