gpio-pch: Save register value in suspend()

Currently, when suspend is occurred, register im0/1 and gpio_use_sel are not
saved.
This patch modifies so that register im0/1 and gpio_use_sel are saved.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index 4ac69bd..7f773af 100644 (file)
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -30,7 +30,8 @@ struct pch_regs {
        u32     pm;
        u32     im0;
        u32     im1;
-       u32     reserved[4];
+       u32     reserved[3];
+       u32     gpio_use_sel;
        u32     reset;
 };
 
@@ -51,10 +52,17 @@ static int gpio_pins[] = {
  * struct pch_gpio_reg_data - The register store data.
  * @po_reg:    To store contents of PO register.
  * @pm_reg:    To store contents of PM register.
+ * @im0_reg:   To store contents of IM0 register.
+ * @im1_reg:   To store contents of IM1 register.
+ * @gpio_use_sel_reg : To store contents of GPIO_USE_SEL register.
+ *                    (Only ML7223 Bus-n)
  */
 struct pch_gpio_reg_data {
        u32 po_reg;
        u32 pm_reg;
+       u32 im0_reg;
+       u32 im1_reg;
+       u32 gpio_use_sel_reg;
 };
 
 /**
@@ -149,6 +157,12 @@ static void pch_gpio_save_reg_conf(struct pch_gpio *chip)
 {
        chip->pch_gpio_reg.po_reg = ioread32(&chip->reg->po);
        chip->pch_gpio_reg.pm_reg = ioread32(&chip->reg->pm);
+       chip->pch_gpio_reg.im0_reg = ioread32(&chip->reg->im0);
+       if (chip->ioh == INTEL_EG20T_PCH)
+               chip->pch_gpio_reg.im1_reg = ioread32(&chip->reg->im1);
+       if (chip->ioh == OKISEMI_ML7223n_IOH)
+               chip->pch_gpio_reg.gpio_use_sel_reg =\
+                                           ioread32(&chip->reg->gpio_use_sel);
 }
 
 /*
@@ -160,6 +174,12 @@ static void pch_gpio_restore_reg_conf(struct pch_gpio *chip)
        iowrite32(chip->pch_gpio_reg.po_reg, &chip->reg->po);
        /* to store contents of PM register */
        iowrite32(chip->pch_gpio_reg.pm_reg, &chip->reg->pm);
+       iowrite32(chip->pch_gpio_reg.im0_reg, &chip->reg->im0);
+       if (chip->ioh == INTEL_EG20T_PCH)
+               iowrite32(chip->pch_gpio_reg.im1_reg, &chip->reg->im1);
+       if (chip->ioh == OKISEMI_ML7223n_IOH)
+               iowrite32(chip->pch_gpio_reg.gpio_use_sel_reg,
+                         &chip->reg->gpio_use_sel);
 }
 
 static void pch_gpio_setup(struct pch_gpio *chip)