Re: [DO NOT MERGE v6 14/37] clk: Compatible with narrow registers

--- a/drivers/clk/clk-gate.c
+++ b/drivers/clk/clk-gate.c

@@ -143,6 +161,18 @@ struct clk_hw *__clk_hw_register_gate(struct device *dev,
                        return ERR_PTR(-EINVAL);
                }

        }
+       if (clk_gate_flags & CLK_GATE_REG_16BIT) {
+               if (bit_idx > 15) {
+                       pr_err("gate bit exceeds 16 bits\n");
+                       return ERR_PTR(-EINVAL);
+               }
+       }
+       if (clk_gate_flags & CLK_GATE_REG_8BIT) {
+               if (bit_idx > 7) {
+                       pr_err("gate bit exceeds 8 bits\n");
+                       return ERR_PTR(-EINVAL);
+               }
+       }

        /* allocate the gate */
        gate = kzalloc(sizeof(*gate), GFP_KERNEL);

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index ace3a4ce2fc9..e2dfc1f083f4 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h

@@ -508,12 +508,16 @@ void of_fixed_clk_setup(struct device_node *np);
  * CLK_GATE_BIG_ENDIAN - by default little endian register accesses are used for
  *     the gate register.  Setting this flag makes the register accesses big
  *     endian.
+ * CLK_GATE_REG_8BIT - by default 32bit register accesses are used for
+ *     the gate register.  Setting this flag makes the register accesses 8bit.
+ * CLK_GATE_REG_16BIT - by default 32bit register accesses are used for
+ *     the gate register.  Setting this flag makes the register accesses 16bit.
  */
 struct clk_gate {
        struct clk_hw hw;
        void __iomem    *reg;
        u8              bit_idx;
-       u8              flags;
+       u32             flags;

        spinlock_t      *lock;
 };

@@ -522,6 +526,8 @@ struct clk_gate {
 #define CLK_GATE_SET_TO_DISABLE                BIT(0)
 #define CLK_GATE_HIWORD_MASK           BIT(1)
 #define CLK_GATE_BIG_ENDIAN            BIT(2)
+#define CLK_GATE_REG_8BIT              BIT(3)
+#define CLK_GATE_REG_16BIT             BIT(4)

 extern const struct clk_ops clk_gate_ops;
 struct clk_hw *__clk_hw_register_gate(struct device *dev,