maru_backlight : Add a node, HBM

Add new node, HBM(High Brightness Mode).

Change-Id: I61bacf987153fe3f6e42922434440aa1b4b4a778
Signed-off-by: Jinhyung Jo <jinhyung.jo@samsung.com>

diff --git a/drivers/maru/maru_bl.c b/drivers/maru/maru_bl.c
index 34f894158238dc219b0e3abc2822a8ee6712a997..c653614282feaba893d4ef421a251f5351e0d3f6 100644 (file)
--- a/drivers/maru/maru_bl.c
+++ b/drivers/maru/maru_bl.c
@@ -66,6 +66,7 @@ struct marubl {
        /* memory mapped registers */
        unsigned char __iomem           *marubl_mmreg;
        int                             power_off;
+       int                             hbm_on;
 };
 
 /* ========================================================================== */
@@ -128,6 +129,45 @@ static struct lcd_ops maru_lcd_ops = {
        .get_power = maru_lcd_get_power,
 };
 
+static ssize_t hbm_show_status(struct device *dev,
+                                                               struct device_attribute *attr,
+                                                               char *buf)
+{
+       int rc;
+
+       rc = sprintf(buf, "%s\n", marubl_device->hbm_on ? "on" : "off");
+       printk(KERN_INFO "[%s] get: %d\n", __func__, marubl_device->hbm_on);
+
+       return rc;
+}
+
+static ssize_t hbm_store_status(struct device *dev,
+                                                               struct device_attribute *attr,
+                                                               const char *buf, size_t count)
+{
+       int ret = -1;
+
+       if (strcmp(buf, "on") == 0) {
+               ret = 1;
+       } else if (strcmp(buf, "off") == 0) {
+               ret = 0;
+       } else {
+               return -EINVAL;
+       }
+
+       if (ret) {
+               marubl_device->brightness = MAX_BRIGHTNESS;
+               writel(marubl_device->brightness, marubl_device->marubl_mmreg);
+       }
+       marubl_device->hbm_on = ret;
+       printk(KERN_INFO "[%s] hbm = %d\n", __func__, ret);
+
+       return ret;
+}
+
+static struct device_attribute hbm_device_attr =
+                                               __ATTR(hbm, 0644, hbm_show_status, hbm_store_status);
+
 /* pci probe function
 */
 static int __devinit marubl_probe(struct pci_dev *pci_dev,
@@ -183,6 +223,20 @@ static int __devinit marubl_probe(struct pci_dev *pci_dev,
        pci_write_config_byte(pci_dev, PCI_LATENCY_TIMER, 64);
        pci_set_master(pci_dev);
 
+       /*
+        * register High Brightness Mode
+        */
+       ret = device_create_file(&pci_dev->dev, &hbm_device_attr);
+       if (ret < 0) {
+               iounmap(marubl_device->marubl_mmreg);
+               release_mem_region(marubl_device->reg_start,
+                                  marubl_device->reg_size);
+               pci_disable_device(pci_dev);
+               kfree(marubl_device);
+               marubl_device = NULL;
+               return ret;
+       }
+
        /*
         * register backlight device
         */
@@ -243,6 +297,7 @@ static void __devexit marubl_exit(struct pci_dev *pcidev)
 
        lcd_device_unregister(ld);
        backlight_device_unregister(bd);
+       device_remove_file(&pcidev->dev, &hbm_device_attr);
 
        /*
         * Unregister pci device & delete device