musb-new: sunxi: Access ahb_reset0_cfg via ccm offset

reset0 is not available for sun4i, 5i and 7i so access
the reset0 offset from ccm via driver data for relevant
Allwinner SoC. this will eventually drop the existing
ifdef for SUN6I.

Tested-by: Chen-Yu Tsai <wens@csie.org> # A33-OlinuXino
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

drivers/usb/musb-new/sunxi.c

@@ -76,15 +76,20 @@
  * From usbc/usbc.c
  ******************************************************************************/
 
+#define OFF_SUN6I_AHB_RESET0	0x2c0
+
 struct sunxi_musb_config {
 	struct musb_hdrc_config *config;
+	bool has_reset;
 	u8 rst_bit;
 	u8 clkgate_bit;
+	u32 off_reset0;
 };
 
 struct sunxi_glue {
 	struct musb_host_data mdata;
 	struct sunxi_ccm_reg *ccm;
+	u32 *reg_reset0;
 	struct sunxi_musb_config *cfg;
 	struct device dev;
 	struct phy phy;
@@ -303,12 +308,12 @@ static int sunxi_musb_init(struct musb *musb)
 	if (glue->cfg->clkgate_bit)
 		setbits_le32(&glue->ccm->ahb_gate0,
 			     BIT(glue->cfg->clkgate_bit));
-#ifdef CONFIG_SUNXI_GEN_SUN6I
-	setbits_le32(&glue->ccm->ahb_reset0_cfg, BIT(AHB_GATE_OFFSET_USB0));
+
+	if (glue->cfg->has_reset)
+		setbits_le32(glue->reg_reset0, BIT(AHB_GATE_OFFSET_USB0));
+
 	if (glue->cfg->rst_bit)
-		setbits_le32(&glue->ccm->ahb_reset0_cfg,
-			     BIT(glue->cfg->rst_bit));
-#endif
+		setbits_le32(glue->reg_reset0, BIT(glue->cfg->rst_bit));
 
 	USBC_ConfigFIFO_Base();
 	USBC_EnableDpDmPullUp(musb->mregs);
@@ -418,6 +423,8 @@ static int musb_usb_probe(struct udevice *dev)
 	if (IS_ERR(glue->ccm))
 		return PTR_ERR(glue->ccm);
 
+	glue->reg_reset0 = (void *)glue->ccm + glue->cfg->off_reset0;
+
 	ret = generic_phy_get_by_name(dev, "usb", &glue->phy);
 	if (ret) {
 		pr_err("failed to get usb PHY\n");
@@ -468,12 +475,12 @@ static int musb_usb_remove(struct udevice *dev)
 
 	musb_stop(host->host);
 
-#ifdef CONFIG_SUNXI_GEN_SUN6I
-	clrbits_le32(&glue->ccm->ahb_reset0_cfg, BIT(AHB_GATE_OFFSET_USB0));
+	if (glue->cfg->has_reset)
+		clrbits_le32(glue->reg_reset0, BIT(AHB_GATE_OFFSET_USB0));
+
 	if (glue->cfg->rst_bit)
-		clrbits_le32(&glue->ccm->ahb_reset0_cfg,
-			     BIT(glue->cfg->rst_bit));
-#endif
+		clrbits_le32(glue->reg_reset0, BIT(glue->cfg->rst_bit));
+
 	clrbits_le32(&glue->ccm->ahb_gate0, BIT(AHB_GATE_OFFSET_USB0));
 	if (glue->cfg->clkgate_bit)
 		clrbits_le32(&glue->ccm->ahb_gate0,
@@ -487,21 +494,30 @@ static int musb_usb_remove(struct udevice *dev)
 
 static const struct sunxi_musb_config sun4i_a10_cfg = {
 	.config = &musb_config,
+	.has_reset = false,
+};
+
+static const struct sunxi_musb_config sun6i_a31_cfg = {
+	.config = &musb_config,
+	.has_reset = true,
+	.off_reset0 = OFF_SUN6I_AHB_RESET0,
 };
 
 static const struct sunxi_musb_config sun8i_h3_cfg = {
 	.config = &musb_config_h3,
+	.has_reset = true,
 	.rst_bit = 23,
 	.clkgate_bit = 23,
+	.off_reset0 = OFF_SUN6I_AHB_RESET0,
 };
 
 static const struct udevice_id sunxi_musb_ids[] = {
 	{ .compatible = "allwinner,sun4i-a10-musb",
 			.data = (ulong)&sun4i_a10_cfg },
 	{ .compatible = "allwinner,sun6i-a31-musb",
-			.data = (ulong)&sun4i_a10_cfg },
+			.data = (ulong)&sun6i_a31_cfg },
 	{ .compatible = "allwinner,sun8i-a33-musb",
-			.data = (ulong)&sun4i_a10_cfg },
+			.data = (ulong)&sun6i_a31_cfg },
 	{ .compatible = "allwinner,sun8i-h3-musb",
 			.data = (ulong)&sun8i_h3_cfg },
 	{ }