mfd: omap-usb-host: Get clocks based on hardware revision

Not all revisions have all the clocks so get the necessary clocks
based on hardware revision.

This should avoid un-necessary clk_get failure messages that were
observed earlier.

Also remove the dummy USB host clocks from the OMAP3 clock data.
These are no longer expected by the driver.

Acked-by: Mike Turquette <mturquette@linaro.org> [OMAP3 CLK data]
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 32 insertions, 11 deletions

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 0c3c9a0c7638..c63bfdf5a419 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -665,22 +665,43 @@ static int usbhs_omap_probe(struct platform_device *pdev)
                 goto err_mem;
         }
 
-        need_logic_fck = false;
+        /* Set all clocks as invalid to begin with */
+        omap->ehci_logic_fck = ERR_PTR(-ENODEV);
+        omap->init_60m_fclk = ERR_PTR(-ENODEV);
+        omap->utmi_p1_gfclk = ERR_PTR(-ENODEV);
+        omap->utmi_p2_gfclk = ERR_PTR(-ENODEV);
+        omap->xclk60mhsp1_ck = ERR_PTR(-ENODEV);
+        omap->xclk60mhsp2_ck = ERR_PTR(-ENODEV);
+
         for (i = 0; i < omap->nports; i++) {
-                if (is_ehci_phy_mode(i) || is_ehci_tll_mode(i) ||
-                        is_ehci_hsic_mode(i))
-                                need_logic_fck |= true;
+                omap->utmi_clk[i] = ERR_PTR(-ENODEV);
+                omap->hsic480m_clk[i] = ERR_PTR(-ENODEV);
+                omap->hsic60m_clk[i] = ERR_PTR(-ENODEV);
         }
 
-        omap->ehci_logic_fck = ERR_PTR(-EINVAL);
-        if (need_logic_fck) {
-                omap->ehci_logic_fck = devm_clk_get(dev, "ehci_logic_fck");
-                if (IS_ERR(omap->ehci_logic_fck)) {
-                        ret = PTR_ERR(omap->ehci_logic_fck);
-                        dev_dbg(dev, "ehci_logic_fck failed:%d\n", ret);
+        /* for OMAP3 i.e. USBHS REV1 */
+        if (omap->usbhs_rev == OMAP_USBHS_REV1) {
+                need_logic_fck = false;
+                for (i = 0; i < omap->nports; i++) {
+                        if (is_ehci_phy_mode(pdata->port_mode[i]) ||
+                            is_ehci_tll_mode(pdata->port_mode[i]) ||
+                            is_ehci_hsic_mode(pdata->port_mode[i]))
+
+                                need_logic_fck |= true;
+                }
+
+                if (need_logic_fck) {
+                        omap->ehci_logic_fck = devm_clk_get(dev,
+                                                            "ehci_logic_fck");
+                        if (IS_ERR(omap->ehci_logic_fck)) {
+                                ret = PTR_ERR(omap->ehci_logic_fck);
+                                dev_dbg(dev, "ehci_logic_fck failed:%d\n", ret);
+                        }
                 }
+                goto initialize;
         }
 
+        /* for OMAP4+ i.e. USBHS REV2+ */
         omap->utmi_p1_gfclk = devm_clk_get(dev, "utmi_p1_gfclk");
         if (IS_ERR(omap->utmi_p1_gfclk)) {
                 ret = PTR_ERR(omap->utmi_p1_gfclk);
@@ -748,7 +769,6 @@ static int usbhs_omap_probe(struct platform_device *pdev)
         }
 
         if (is_ehci_phy_mode(pdata->port_mode[0])) {
-                /* for OMAP3, clk_set_parent fails */
                 ret = clk_set_parent(omap->utmi_p1_gfclk,
                                         omap->xclk60mhsp1_ck);
                 if (ret != 0)
@@ -776,6 +796,7 @@ static int usbhs_omap_probe(struct platform_device *pdev)
                                         ret);
         }
 
+initialize:
         omap_usbhs_init(dev);
 
         if (dev->of_node) {