net: ipa: encapsulate updating three more registers

Create a new function that encapsulates setting the BCR, TX_CFG, and
CLKON_CFG register values during hardware configuration.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 8bb4b03..a552d6e 100644 (file)
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -183,6 +183,56 @@ static void ipa_teardown(struct ipa *ipa)
        gsi_teardown(&ipa->gsi);
 }
 
+static void
+ipa_hardware_config_bcr(struct ipa *ipa, const struct ipa_data *data)
+{
+       u32 val;
+
+       /* IPA v4.5+ has no backward compatibility register */
+       if (ipa->version >= IPA_VERSION_4_5)
+               return;
+
+       val = data->backward_compat;
+       iowrite32(val, ipa->reg_virt + IPA_REG_BCR_OFFSET);
+}
+
+static void ipa_hardware_config_tx(struct ipa *ipa)
+{
+       enum ipa_version version = ipa->version;
+       u32 val;
+
+       if (version <= IPA_VERSION_4_0 || version >= IPA_VERSION_4_5)
+               return;
+
+       /* Disable PA mask to allow HOLB drop */
+       val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
+
+       val &= ~PA_MASK_EN_FMASK;
+
+       iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
+}
+
+static void ipa_hardware_config_clkon(struct ipa *ipa)
+{
+       enum ipa_version version = ipa->version;
+       u32 val;
+
+       if (version < IPA_VERSION_3_1 || version >= IPA_VERSION_4_5)
+               return;
+
+       /* Implement some hardware workarounds */
+       if (version >= IPA_VERSION_4_0) {
+               /* Enable open global clocks in the CLKON configuration */
+               val = GLOBAL_FMASK | GLOBAL_2X_CLK_FMASK;
+       } else if (version == IPA_VERSION_3_1) {
+               val = MISC_FMASK;       /* Disable MISC clock gating */
+       } else {
+               return;
+       }
+
+       iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET);
+}
+
 /* Configure bus access behavior for IPA components */
 static void ipa_hardware_config_comp(struct ipa *ipa)
 {
@@ -382,32 +432,9 @@ static void ipa_hardware_dcd_deconfig(struct ipa *ipa)
  */
 static void ipa_hardware_config(struct ipa *ipa, const struct ipa_data *data)
 {
-       enum ipa_version version = ipa->version;
-       u32 val;
-
-       /* IPA v4.5+ has no backward compatibility register */
-       if (version < IPA_VERSION_4_5) {
-               val = data->backward_compat;
-               iowrite32(val, ipa->reg_virt + IPA_REG_BCR_OFFSET);
-       }
-
-       /* Implement some hardware workarounds */
-       if (version >= IPA_VERSION_4_0 && version < IPA_VERSION_4_5) {
-               /* Disable PA mask to allow HOLB drop */
-               val = ioread32(ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
-               val &= ~PA_MASK_EN_FMASK;
-               iowrite32(val, ipa->reg_virt + IPA_REG_TX_CFG_OFFSET);
-
-               /* Enable open global clocks in the CLKON configuration */
-               val = GLOBAL_FMASK | GLOBAL_2X_CLK_FMASK;
-       } else if (version == IPA_VERSION_3_1) {
-               val = MISC_FMASK;       /* Disable MISC clock gating */
-       } else {
-               val = 0;                /* No CLKON configuration needed */
-       }
-       if (val)
-               iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET);
-
+       ipa_hardware_config_bcr(ipa, data);
+       ipa_hardware_config_tx(ipa);
+       ipa_hardware_config_clkon(ipa);
        ipa_hardware_config_comp(ipa);
        ipa_hardware_config_qsb(ipa, data);
        ipa_hardware_config_timing(ipa);