mfd: omap-usb-host: Manage HSIC clocks for HSIC mode

Enable the optional HSIC clocks (60MHz and 480MHz) for the ports
that are configured in HSIC mode.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>

1 files changed, 83 insertions, 14 deletions

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 9fa0215e3df4..bdfc8b7b5aff 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -93,6 +93,8 @@
 struct usbhs_hcd_omap {
         int                             nports;
         struct clk                      **utmi_clk;
+        struct clk                      **hsic60m_clk;
+        struct clk                      **hsic480m_clk;
 
         struct clk                      *xclk60mhsp1_ck;
         struct clk                      *xclk60mhsp2_ck;
@@ -286,13 +288,40 @@ static int usbhs_runtime_resume(struct device *dev)
                 clk_enable(omap->ehci_logic_fck);
 
         for (i = 0; i < omap->nports; i++) {
-                if (!is_ehci_tll_mode(pdata->port_mode[i]) ||
-                                IS_ERR(omap->utmi_clk[i]))
-                        continue;
-
-                r = clk_enable(omap->utmi_clk[i]);
-                if (r)
-                        dev_err(dev, "Can't enable port %d clk : %d\n", i, r);
+                switch (pdata->port_mode[i]) {
+                case OMAP_EHCI_PORT_MODE_HSIC:
+                        if (!IS_ERR(omap->hsic60m_clk[i])) {
+                                r = clk_enable(omap->hsic60m_clk[i]);
+                                if (r) {
+                                        dev_err(dev,
+                                         "Can't enable port %d hsic60m clk:%d\n",
+                                         i, r);
+                                }
+                        }
+
+                        if (!IS_ERR(omap->hsic480m_clk[i])) {
+                                r = clk_enable(omap->hsic480m_clk[i]);
+                                if (r) {
+                                        dev_err(dev,
+                                         "Can't enable port %d hsic480m clk:%d\n",
+                                         i, r);
+                                }
+                        }
+                /* Fall through as HSIC mode needs utmi_clk */
+
+                case OMAP_EHCI_PORT_MODE_TLL:
+                        if (!IS_ERR(omap->utmi_clk[i])) {
+                                r = clk_enable(omap->utmi_clk[i]);
+                                if (r) {
+                                        dev_err(dev,
+                                         "Can't enable port %d clk : %d\n",
+                                         i, r);
+                                }
+                        }
+                        break;
+                default:
+                        break;
+                }
         }
 
         spin_unlock_irqrestore(&omap->lock, flags);
@@ -312,9 +341,22 @@ static int usbhs_runtime_suspend(struct device *dev)
         spin_lock_irqsave(&omap->lock, flags);
 
         for (i = 0; i < omap->nports; i++) {
-                if (is_ehci_tll_mode(pdata->port_mode[i]) &&
-                                !IS_ERR(omap->utmi_clk[i]))
-                        clk_disable(omap->utmi_clk[i]);
+                switch (pdata->port_mode[i]) {
+                case OMAP_EHCI_PORT_MODE_HSIC:
+                        if (!IS_ERR(omap->hsic60m_clk[i]))
+                                clk_disable(omap->hsic60m_clk[i]);
+
+                        if (!IS_ERR(omap->hsic480m_clk[i]))
+                                clk_disable(omap->hsic480m_clk[i]);
+                /* Fall through as utmi_clks were used in HSIC mode */
+
+                case OMAP_EHCI_PORT_MODE_TLL:
+                        if (!IS_ERR(omap->utmi_clk[i]))
+                                clk_disable(omap->utmi_clk[i]);
+                        break;
+                default:
+                        break;
+                }
         }
 
         if (!IS_ERR(omap->ehci_logic_fck))
@@ -520,7 +562,10 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 
         i = sizeof(struct clk *) * omap->nports;
         omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL);
-        if (!omap->utmi_clk) {
+        omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
+        omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
+
+        if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) {
                 dev_err(dev, "Memory allocation failed\n");
                 ret = -ENOMEM;
                 goto err_mem;
@@ -578,7 +623,7 @@ static int usbhs_omap_probe(struct platform_device *pdev)
         }
 
         for (i = 0; i < omap->nports; i++) {
-                char clkname[] = "usb_host_hs_utmi_px_clk";
+                char clkname[30];
 
                 /* clock names are indexed from 1*/
                 snprintf(clkname, sizeof(clkname),
@@ -592,6 +637,20 @@ static int usbhs_omap_probe(struct platform_device *pdev)
                 if (IS_ERR(omap->utmi_clk[i]))
                         dev_dbg(dev, "Failed to get clock : %s : %ld\n",
                                 clkname, PTR_ERR(omap->utmi_clk[i]));
+
+                snprintf(clkname, sizeof(clkname),
+                                "usb_host_hs_hsic480m_p%d_clk", i + 1);
+                omap->hsic480m_clk[i] = clk_get(dev, clkname);
+                if (IS_ERR(omap->hsic480m_clk[i]))
+                        dev_dbg(dev, "Failed to get clock : %s : %ld\n",
+                                clkname, PTR_ERR(omap->hsic480m_clk[i]));
+
+                snprintf(clkname, sizeof(clkname),
+                                "usb_host_hs_hsic60m_p%d_clk", i + 1);
+                omap->hsic60m_clk[i] = clk_get(dev, clkname);
+                if (IS_ERR(omap->hsic60m_clk[i]))
+                        dev_dbg(dev, "Failed to get clock : %s : %ld\n",
+                                clkname, PTR_ERR(omap->hsic60m_clk[i]));
         }
 
         if (is_ehci_phy_mode(pdata->port_mode[0])) {
@@ -635,9 +694,14 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 err_alloc:
         omap_usbhs_deinit(&pdev->dev);
 
-        for (i = 0; i < omap->nports; i++)
+        for (i = 0; i < omap->nports; i++) {
                 if (!IS_ERR(omap->utmi_clk[i]))
                         clk_put(omap->utmi_clk[i]);
+                if (!IS_ERR(omap->hsic60m_clk[i]))
+                        clk_put(omap->hsic60m_clk[i]);
+                if (!IS_ERR(omap->hsic480m_clk[i]))
+                        clk_put(omap->hsic480m_clk[i]);
+        }
 
         clk_put(omap->init_60m_fclk);
 
@@ -676,9 +740,14 @@ static int usbhs_omap_remove(struct platform_device *pdev)
 
         omap_usbhs_deinit(&pdev->dev);
 
-        for (i = 0; i < omap->nports; i++)
+        for (i = 0; i < omap->nports; i++) {
                 if (!IS_ERR(omap->utmi_clk[i]))
                         clk_put(omap->utmi_clk[i]);
+                if (!IS_ERR(omap->hsic60m_clk[i]))
+                        clk_put(omap->hsic60m_clk[i]);
+                if (!IS_ERR(omap->hsic480m_clk[i]))
+                        clk_put(omap->hsic480m_clk[i]);
+        }
 
         clk_put(omap->init_60m_fclk);
         clk_put(omap->utmi_p1_gfclk);