linux-kernel - [PATCH 1/5] input/cma3000_d0x: Support devices without pdata

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Date:	Tue, 18 Oct 2011 10:28:02 +0200
From:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:	dmitry.torokhov@...il.com, sameo@...ux.intel.com,
	peter.ujfalusi@...com, aghayal@...eaurora.org, david@...deman.nu,
	Shubhrajyoti@...com, saaguirre@...com, jic23@....ac.uk,
	hemanthv@...com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Subject: [PATCH 1/5] input/cma3000_d0x: Support devices without pdata

Architechtures based on device-tree does not have platform data
associated to the spi/i2c devices.
This patch allows those architechtures to use the cma3000 driver with
a default configuration.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
---
 drivers/input/misc/cma3000_d0x.c |   21 +++++++++++++++++++--
 1 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/input/misc/cma3000_d0x.c b/drivers/input/misc/cma3000_d0x.c
index 1633b63..2f993d5 100644
--- a/drivers/input/misc/cma3000_d0x.c
+++ b/drivers/input/misc/cma3000_d0x.c
@@ -62,6 +62,18 @@
 #define BIT_TO_2G  18
 #define BIT_TO_8G  71
 
+static struct cma3000_platform_data cma3000_default_pdata = {
+	.mdthr = 0x8,
+	.mdfftmr = 0x33,
+	.ffthr = 0x8,
+	.mode = CMAMODE_MEAS400,
+	.g_range = CMARANGE_2G,
+	.fuzz_x = BIT_TO_2G,
+	.fuzz_y = BIT_TO_2G,
+	.fuzz_z = BIT_TO_2G,
+	.irqflags = 0,
+};
+
 struct cma3000_accl_data {
 	const struct cma3000_bus_ops *bus_ops;
 	const struct cma3000_platform_data *pdata;
@@ -283,19 +295,24 @@ EXPORT_SYMBOL(cma3000_resume);
 struct cma3000_accl_data *cma3000_init(struct device *dev, int irq,
 				       const struct cma3000_bus_ops *bops)
 {
-	const struct cma3000_platform_data *pdata = dev->platform_data;
+	const struct cma3000_platform_data *pdata;
 	struct cma3000_accl_data *data;
 	struct input_dev *input_dev;
 	int rev;
 	int error;
 
+	if (!dev->platform_data) {
+		dev_info(dev, "platform data not found, using default\n");
+		pdata = &cma3000_default_pdata;
+	} else
+		pdata = dev->platform_data;
+
 	if (!pdata) {
 		dev_err(dev, "platform data not found\n");
 		error = -EINVAL;
 		goto err_out;
 	}
 
-
 	/* if no IRQ return error */
 	if (irq == 0) {
 		error = -EINVAL;
-- 
1.7.7

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