Message ID | 1325053170-6984-2-git-send-email-olof@lixom.net |
---|---|
State | Superseded, archived |
Headers | show |
On Tue, Dec 27, 2011 at 10:19:29PM -0800, Olof Johansson wrote: > This adds a simple device tree binding to the tegra keyboard controller. > > Also, mark the default keymap as __devinitdata since it is not referenced > after boot, and shorten the name to not have to avoid line wraps. > > Signed-off-by: Olof Johansson <olof@lixom.net> > --- > .../devicetree/bindings/input/tegra-kbc.txt | 18 +++++ > drivers/input/keyboard/tegra-kbc.c | 70 ++++++++++++++++++-- > 2 files changed, 83 insertions(+), 5 deletions(-) > create mode 100644 Documentation/devicetree/bindings/input/tegra-kbc.txt > > diff --git a/Documentation/devicetree/bindings/input/tegra-kbc.txt b/Documentation/devicetree/bindings/input/tegra-kbc.txt > new file mode 100644 > index 0000000..a7c1d40 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/tegra-kbc.txt > @@ -0,0 +1,18 @@ > +* Tegra keyboard controller > + > +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 I'd like to see a "tegra," prefix on these custom properties, but otherwise the binding looks okay to me. You should also consider a '-ms' suffix on the millisecond properties. Otherwise; Acked-by: Grant Likely <grant.likely@secretlab.ca> > + > +Example: > + > +keyboard: keyboard { > + compatible = "nvidia,tegra20-kbc"; > + reg = <0x7000e200 0x100>; > + ghost-filter; > +}; > diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c > index cf3228b..4ce6cc8 100644 > --- a/drivers/input/keyboard/tegra-kbc.c > +++ b/drivers/input/keyboard/tegra-kbc.c > @@ -26,6 +26,7 @@ > #include <linux/delay.h> > #include <linux/io.h> > #include <linux/interrupt.h> > +#include <linux/of.h> > #include <linux/clk.h> > #include <linux/slab.h> > #include <mach/clk.h> > @@ -82,7 +83,7 @@ struct tegra_kbc { > struct clk *clk; > }; > > -static const u32 tegra_kbc_default_keymap[] = { > +static const u32 default_keymap[] __devinitdata = { > KEY(0, 2, KEY_W), > KEY(0, 3, KEY_S), > KEY(0, 4, KEY_A), > @@ -217,9 +218,9 @@ static const u32 tegra_kbc_default_keymap[] = { > 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 const struct matrix_keymap_data default_keymap_data __devinitdata = { > + .keymap = default_keymap, > + .keymap_size = ARRAY_SIZE(default_keymap), > }; > > static void tegra_kbc_report_released_keys(struct input_dev *input, > @@ -576,6 +577,55 @@ tegra_kbc_check_pin_cfg(const struct tegra_kbc_platform_data *pdata, > return true; > } > > +#ifdef CONFIG_OF > +static struct tegra_kbc_platform_data * __devinit tegra_kbc_dt_parse_pdata( > + struct platform_device *pdev) > +{ > + struct tegra_kbc_platform_data *pdata; > + struct device_node *np = pdev->dev.of_node; > + int i; > + u32 prop; > + > + if (!np) > + return NULL; > + > + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); > + > + if (!of_property_read_u32(np, "debounce-delay", &prop)) > + pdata->debounce_cnt = prop; > + > + if (!of_property_read_u32(np, "repeat-delay", &prop)) > + pdata->repeat_cnt = prop; > + > + if (of_find_property(np, "needs-ghost-filter", NULL)) > + pdata->use_ghost_filter = true; > + > + if (of_find_property(np, "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].is_row = true; > + } > + > + for (i = 0; i < KBC_MAX_COL; i++) { > + pdata->pin_cfg[KBC_MAX_ROW + i].num = i; > + pdata->pin_cfg[KBC_MAX_ROW + i].is_row = false; > + } > + > + return pdata; > +} > +#else > +static inline struct tegra_kbc_platform_data *tegra_kbc_dt_parse_pdata( > + struct platform_device *pdev) > +{ > + return NULL; > +} > +#endif > + > static int __devinit tegra_kbc_probe(struct platform_device *pdev) > { > const struct tegra_kbc_platform_data *pdata = pdev->dev.platform_data; > @@ -590,6 +640,9 @@ static int __devinit tegra_kbc_probe(struct platform_device *pdev) > unsigned int scan_time_rows; > > if (!pdata) > + pdata = tegra_kbc_dt_parse_pdata(pdev); > + > + if (!pdata) > return -EINVAL; > > if (!tegra_kbc_check_pin_cfg(pdata, &pdev->dev, &num_rows)) > @@ -671,7 +724,7 @@ static int __devinit tegra_kbc_probe(struct platform_device *pdev) > > kbc->use_fn_map = pdata->use_fn_map; > kbc->use_ghost_filter = pdata->use_ghost_filter; > - keymap_data = pdata->keymap_data ?: &tegra_kbc_default_keymap_data; > + keymap_data = pdata->keymap_data ?: &default_keymap_data; > matrix_keypad_build_keymap(keymap_data, KBC_ROW_SHIFT, > input_dev->keycode, input_dev->keybit); > > @@ -793,6 +846,12 @@ static int tegra_kbc_resume(struct device *dev) > > static SIMPLE_DEV_PM_OPS(tegra_kbc_pm_ops, tegra_kbc_suspend, tegra_kbc_resume); > > +static const struct of_device_id tegra_kbc_of_match[] = { > + { .compatible = "nvidia,tegra20-kbc", }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, tegra_kbc_of_match); > + > static struct platform_driver tegra_kbc_driver = { > .probe = tegra_kbc_probe, > .remove = __devexit_p(tegra_kbc_remove), > @@ -800,6 +859,7 @@ static struct platform_driver tegra_kbc_driver = { > .name = "tegra-kbc", > .owner = THIS_MODULE, > .pm = &tegra_kbc_pm_ops, > + .of_match_table = tegra_kbc_of_match, > }, > }; > > -- > 1.7.8.GIT > -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Jan 2, 2012 at 12:18 AM, Grant Likely <grant.likely@secretlab.ca> wrote: > I'd like to see a "tegra," prefix on these custom properties, but otherwise > the binding looks okay to me. You should also consider a '-ms' suffix on > the millisecond properties. Ok, I added "nvidia," prefix for the properties, and pushed down the linux,fn-keymap binding to this level (but I left the implementation as a FIXME). > Otherwise; > > Acked-by: Grant Likely <grant.likely@secretlab.ca> Thanks, added and I'll repost the patch together with the shared binding in a bit. -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/input/tegra-kbc.txt b/Documentation/devicetree/bindings/input/tegra-kbc.txt new file mode 100644 index 0000000..a7c1d40 --- /dev/null +++ b/Documentation/devicetree/bindings/input/tegra-kbc.txt @@ -0,0 +1,18 @@ +* Tegra keyboard controller + +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 + +Example: + +keyboard: keyboard { + compatible = "nvidia,tegra20-kbc"; + reg = <0x7000e200 0x100>; + ghost-filter; +}; diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c index cf3228b..4ce6cc8 100644 --- a/drivers/input/keyboard/tegra-kbc.c +++ b/drivers/input/keyboard/tegra-kbc.c @@ -26,6 +26,7 @@ #include <linux/delay.h> #include <linux/io.h> #include <linux/interrupt.h> +#include <linux/of.h> #include <linux/clk.h> #include <linux/slab.h> #include <mach/clk.h> @@ -82,7 +83,7 @@ struct tegra_kbc { struct clk *clk; }; -static const u32 tegra_kbc_default_keymap[] = { +static const u32 default_keymap[] __devinitdata = { KEY(0, 2, KEY_W), KEY(0, 3, KEY_S), KEY(0, 4, KEY_A), @@ -217,9 +218,9 @@ static const u32 tegra_kbc_default_keymap[] = { 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 const struct matrix_keymap_data default_keymap_data __devinitdata = { + .keymap = default_keymap, + .keymap_size = ARRAY_SIZE(default_keymap), }; static void tegra_kbc_report_released_keys(struct input_dev *input, @@ -576,6 +577,55 @@ tegra_kbc_check_pin_cfg(const struct tegra_kbc_platform_data *pdata, return true; } +#ifdef CONFIG_OF +static struct tegra_kbc_platform_data * __devinit tegra_kbc_dt_parse_pdata( + struct platform_device *pdev) +{ + struct tegra_kbc_platform_data *pdata; + struct device_node *np = pdev->dev.of_node; + int i; + u32 prop; + + if (!np) + return NULL; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + + if (!of_property_read_u32(np, "debounce-delay", &prop)) + pdata->debounce_cnt = prop; + + if (!of_property_read_u32(np, "repeat-delay", &prop)) + pdata->repeat_cnt = prop; + + if (of_find_property(np, "needs-ghost-filter", NULL)) + pdata->use_ghost_filter = true; + + if (of_find_property(np, "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].is_row = true; + } + + for (i = 0; i < KBC_MAX_COL; i++) { + pdata->pin_cfg[KBC_MAX_ROW + i].num = i; + pdata->pin_cfg[KBC_MAX_ROW + i].is_row = false; + } + + return pdata; +} +#else +static inline struct tegra_kbc_platform_data *tegra_kbc_dt_parse_pdata( + struct platform_device *pdev) +{ + return NULL; +} +#endif + static int __devinit tegra_kbc_probe(struct platform_device *pdev) { const struct tegra_kbc_platform_data *pdata = pdev->dev.platform_data; @@ -590,6 +640,9 @@ static int __devinit tegra_kbc_probe(struct platform_device *pdev) unsigned int scan_time_rows; if (!pdata) + pdata = tegra_kbc_dt_parse_pdata(pdev); + + if (!pdata) return -EINVAL; if (!tegra_kbc_check_pin_cfg(pdata, &pdev->dev, &num_rows)) @@ -671,7 +724,7 @@ static int __devinit tegra_kbc_probe(struct platform_device *pdev) kbc->use_fn_map = pdata->use_fn_map; kbc->use_ghost_filter = pdata->use_ghost_filter; - keymap_data = pdata->keymap_data ?: &tegra_kbc_default_keymap_data; + keymap_data = pdata->keymap_data ?: &default_keymap_data; matrix_keypad_build_keymap(keymap_data, KBC_ROW_SHIFT, input_dev->keycode, input_dev->keybit); @@ -793,6 +846,12 @@ static int tegra_kbc_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(tegra_kbc_pm_ops, tegra_kbc_suspend, tegra_kbc_resume); +static const struct of_device_id tegra_kbc_of_match[] = { + { .compatible = "nvidia,tegra20-kbc", }, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_kbc_of_match); + static struct platform_driver tegra_kbc_driver = { .probe = tegra_kbc_probe, .remove = __devexit_p(tegra_kbc_remove), @@ -800,6 +859,7 @@ static struct platform_driver tegra_kbc_driver = { .name = "tegra-kbc", .owner = THIS_MODULE, .pm = &tegra_kbc_pm_ops, + .of_match_table = tegra_kbc_of_match, }, };
This adds a simple device tree binding to the tegra keyboard controller. Also, mark the default keymap as __devinitdata since it is not referenced after boot, and shorten the name to not have to avoid line wraps. Signed-off-by: Olof Johansson <olof@lixom.net> --- .../devicetree/bindings/input/tegra-kbc.txt | 18 +++++ drivers/input/keyboard/tegra-kbc.c | 70 ++++++++++++++++++-- 2 files changed, 83 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/input/tegra-kbc.txt