[PATCH v5 0/9] USB Host support for OMAP5 uEVM (for 3.14)

[PATCH v5 0/9] USB Host support for OMAP5 uEVM (for 3.14)

[Roger Quadros]

Hi Benoit & Tony,

This patchset brings up USB Host ports and Ethernet port on
the OMAP5 uEVM board.

It depends on the TI Clock DT conversion patches [1] and is based
on 3.13-rc7

[1] - http://article.gmane.org/gmane.linux.ports.arm.kernel/289895

NOTE: I've tested this only on the OMAP5 uEVM board. Since the patchset
changes could affect OMAP3/4, it must be verified at least on
a Beagleboard and a Panda board before being pulled in.
I request someone to verify this on OMAP3/4 since I don't have access
to those boards at the moment. Thanks.

Changelog:

v5:
- Expose all clocks in the DT binding document for mfd:omap-usb-host
and mfd:omap-usb-tll

v4:
- Updated DT binding document for clock binding

v3:
- Rebased on top of 3.13-rc7

cheers,
-roger

Roger Quadros (9):
  mfd: omap-usb-host: Use resource managed clk_get()
  mfd: omap-usb-host: Get clocks based on hardware revision
  mfd: omap-usb-host: Update DT clock binding information
  mfd: omap-usb-tll: Update DT clock binding information
  ARM: dts: omap4: Update omap-usb-host node
  ARM: dts: omap5: Update omap-usb-host node
  ARM: dts: omap4-panda: Provide USB PHY clock
  ARM: dts: omap5-uevm: Provide USB PHY clock
  ARM: OMAP2+: Remove legacy_init_ehci_clk()

 .../devicetree/bindings/mfd/omap-usb-host.txt      |  23 +++
 .../devicetree/bindings/mfd/omap-usb-tll.txt       |  10 ++
 arch/arm/boot/dts/omap4-panda-common.dtsi          |   8 +-
 arch/arm/boot/dts/omap4.dtsi                       |   6 +
 arch/arm/boot/dts/omap5-uevm.dts                   |   8 +-
 arch/arm/boot/dts/omap5.dtsi                       |   6 +
 arch/arm/mach-omap2/pdata-quirks.c                 |  16 --
 drivers/mfd/omap-usb-host.c                        | 172 ++++++++++-----------
 8 files changed, 128 insertions(+), 121 deletions(-)

-- 
1.8.3.2

[PATCH v5 1/9] mfd: omap-usb-host: Use resource managed clk_get()

[Roger Quadros]

Use devm_clk_get() instead of clk_get().

CC: Lee Jones <lee.jones@linaro.org>
CC: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 drivers/mfd/omap-usb-host.c | 81 +++++++++------------------------------------
 1 file changed, 16 insertions(+), 65 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 142650f..1c9bca2 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -674,46 +674,46 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 
 	omap->ehci_logic_fck = ERR_PTR(-EINVAL);
 	if (need_logic_fck) {
-		omap->ehci_logic_fck = clk_get(dev, "ehci_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);
 		}
 	}
 
-	omap->utmi_p1_gfclk = clk_get(dev, "utmi_p1_gfclk");
+	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);
 		dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
-		goto err_p1_gfclk;
+		goto err_mem;
 	}
 
-	omap->utmi_p2_gfclk = clk_get(dev, "utmi_p2_gfclk");
+	omap->utmi_p2_gfclk = devm_clk_get(dev, "utmi_p2_gfclk");
 	if (IS_ERR(omap->utmi_p2_gfclk)) {
 		ret = PTR_ERR(omap->utmi_p2_gfclk);
 		dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
-		goto err_p2_gfclk;
+		goto err_mem;
 	}
 
-	omap->xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck");
+	omap->xclk60mhsp1_ck = devm_clk_get(dev, "xclk60mhsp1_ck");
 	if (IS_ERR(omap->xclk60mhsp1_ck)) {
 		ret = PTR_ERR(omap->xclk60mhsp1_ck);
 		dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret);
-		goto err_xclk60mhsp1;
+		goto err_mem;
 	}
 
-	omap->xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck");
+	omap->xclk60mhsp2_ck = devm_clk_get(dev, "xclk60mhsp2_ck");
 	if (IS_ERR(omap->xclk60mhsp2_ck)) {
 		ret = PTR_ERR(omap->xclk60mhsp2_ck);
 		dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret);
-		goto err_xclk60mhsp2;
+		goto err_mem;
 	}
 
-	omap->init_60m_fclk = clk_get(dev, "init_60m_fclk");
+	omap->init_60m_fclk = devm_clk_get(dev, "init_60m_fclk");
 	if (IS_ERR(omap->init_60m_fclk)) {
 		ret = PTR_ERR(omap->init_60m_fclk);
 		dev_err(dev, "init_60m_fclk failed error:%d\n", ret);
-		goto err_init60m;
+		goto err_mem;
 	}
 
 	for (i = 0; i < omap->nports; i++) {
@@ -727,21 +727,21 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 		 * platforms have all clocks and we can function without
 		 * them
 		 */
-		omap->utmi_clk[i] = clk_get(dev, clkname);
+		omap->utmi_clk[i] = devm_clk_get(dev, clkname);
 		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);
+		omap->hsic480m_clk[i] = devm_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);
+		omap->hsic60m_clk[i] = devm_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]));
@@ -784,7 +784,7 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 
 		if (ret) {
 			dev_err(dev, "Failed to create DT children: %d\n", ret);
-			goto err_alloc;
+			goto err_mem;
 		}
 
 	} else {
@@ -792,40 +792,12 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 		if (ret) {
 			dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
 						ret);
-			goto err_alloc;
+			goto err_mem;
 		}
 	}
 
 	return 0;
 
-err_alloc:
-	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);
-
-err_init60m:
-	clk_put(omap->xclk60mhsp2_ck);
-
-err_xclk60mhsp2:
-	clk_put(omap->xclk60mhsp1_ck);
-
-err_xclk60mhsp1:
-	clk_put(omap->utmi_p2_gfclk);
-
-err_p2_gfclk:
-	clk_put(omap->utmi_p1_gfclk);
-
-err_p1_gfclk:
-	if (!IS_ERR(omap->ehci_logic_fck))
-		clk_put(omap->ehci_logic_fck);
-
 err_mem:
 	pm_runtime_disable(dev);
 
@@ -847,27 +819,6 @@ static int usbhs_omap_remove_child(struct device *dev, void *data)
  */
 static int usbhs_omap_remove(struct platform_device *pdev)
 {
-	struct usbhs_hcd_omap *omap = platform_get_drvdata(pdev);
-	int 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);
-	clk_put(omap->utmi_p2_gfclk);
-	clk_put(omap->xclk60mhsp2_ck);
-	clk_put(omap->xclk60mhsp1_ck);
-
-	if (!IS_ERR(omap->ehci_logic_fck))
-		clk_put(omap->ehci_logic_fck);
-
 	pm_runtime_disable(&pdev->dev);
 
 	/* remove children */
-- 
1.8.3.2

Re: [PATCH v5 1/9] mfd: omap-usb-host: Use resource managed clk_get()

[Lee Jones]

> Use devm_clk_get() instead of clk_get().
> 
> CC: Lee Jones <lee.jones@linaro.org>
> CC: Samuel Ortiz <sameo@linux.intel.com>
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
>  drivers/mfd/omap-usb-host.c | 81 +++++++++------------------------------------
>  1 file changed, 16 insertions(+), 65 deletions(-)

Nice clean up.

Acked-by: Lee Jones <lee.jones@linaro.org>

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[PATCH v5 3/9] mfd: omap-usb-host: Update DT clock binding information

[Roger Quadros]

The omap-usb-host driver expects certained named clocks.
Add this information to the DT binding document.

Use clock names as per function for reference clocks.

CC: Lee Jones <lee.jones@linaro.org>
CC: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 .../devicetree/bindings/mfd/omap-usb-host.txt      | 23 ++++++++++++++++++++++
 drivers/mfd/omap-usb-host.c                        |  6 +++---
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-host.txt b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
index b381fa6..4721b2d 100644
--- a/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
+++ b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
@@ -32,6 +32,29 @@ Optional properties:
 - single-ulpi-bypass: Must be present if the controller contains a single
   ULPI bypass control bit. e.g. OMAP3 silicon <= ES2.1
 
+- clocks: a list of phandles and clock-specifier pairs, one for each entry in
+  clock-names.
+
+- clock-names: should include:
+  For OMAP3
+  * "usbhost_120m_fck" - 120MHz Functional clock.
+
+  For OMAP4+
+  * "refclk_60m_int" - 60MHz internal reference clock for UTMI clock mux
+  * "refclk_60m_ext_p1" - 60MHz external ref. clock for Port 1's UTMI clock mux.
+  * "refclk_60m_ext_p2" - 60MHz external ref. clock for Port 2's UTMI clock mux
+  * "utmi_p1_gfclk" - Port 1 UTMI clock mux.
+  * "utmi_p2_gfclk" - Port 2 UTMI clock mux.
+  * "usb_host_hs_utmi_p1_clk" - Port 1 UTMI clock gate.
+  * "usb_host_hs_utmi_p2_clk" - Port 2 UTMI clock gate.
+  * "usb_host_hs_utmi_p3_clk" - Port 3 UTMI clock gate.
+  * "usb_host_hs_hsic480m_p1_clk" - Port 1 480MHz HSIC clock gate.
+  * "usb_host_hs_hsic480m_p2_clk" - Port 2 480MHz HSIC clock gate.
+  * "usb_host_hs_hsic480m_p3_clk" - Port 3 480MHz HSIC clock gate.
+  * "usb_host_hs_hsic60m_p1_clk" - Port 1 60MHz HSIC clock gate.
+  * "usb_host_hs_hsic60m_p2_clk" - Port 2 60MHz HSIC clock gate.
+  * "usb_host_hs_hsic60m_p3_clk" - Port 3 60MHz HSIC clock gate.
+
 Required properties if child node exists:
 
 - #address-cells: Must be 1
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 7202cc6..eeea6e6 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -713,21 +713,21 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 		goto err_mem;
 	}
 
-	omap->xclk60mhsp1_ck = devm_clk_get(dev, "xclk60mhsp1_ck");
+	omap->xclk60mhsp1_ck = devm_clk_get(dev, "refclk_60m_ext_p1");
 	if (IS_ERR(omap->xclk60mhsp1_ck)) {
 		ret = PTR_ERR(omap->xclk60mhsp1_ck);
 		dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret);
 		goto err_mem;
 	}
 
-	omap->xclk60mhsp2_ck = devm_clk_get(dev, "xclk60mhsp2_ck");
+	omap->xclk60mhsp2_ck = devm_clk_get(dev, "refclk_60m_ext_p2");
 	if (IS_ERR(omap->xclk60mhsp2_ck)) {
 		ret = PTR_ERR(omap->xclk60mhsp2_ck);
 		dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret);
 		goto err_mem;
 	}
 
-	omap->init_60m_fclk = devm_clk_get(dev, "init_60m_fclk");
+	omap->init_60m_fclk = devm_clk_get(dev, "refclk_60m_int");
 	if (IS_ERR(omap->init_60m_fclk)) {
 		ret = PTR_ERR(omap->init_60m_fclk);
 		dev_err(dev, "init_60m_fclk failed error:%d\n", ret);
-- 
1.8.3.2

Re: [PATCH v5 3/9] mfd: omap-usb-host: Update DT clock binding information

[Lee Jones]

On Thu, 09 Jan 2014, Roger Quadros wrote:

> The omap-usb-host driver expects certained named clocks.
> Add this information to the DT binding document.
> 
> Use clock names as per function for reference clocks.
> 
> CC: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> CC: Samuel Ortiz <sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
> ---
>  .../devicetree/bindings/mfd/omap-usb-host.txt      | 23 ++++++++++++++++++++++
>  drivers/mfd/omap-usb-host.c                        |  6 +++---
>  2 files changed, 26 insertions(+), 3 deletions(-)

Please don't mix up binding changes with code ones.

Separate patch please.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [PATCH v5 3/9] mfd: omap-usb-host: Update DT clock binding information

[Roger Quadros]

On 01/10/2014 12:11 PM, Lee Jones wrote:
> On Thu, 09 Jan 2014, Roger Quadros wrote:
> 
>> The omap-usb-host driver expects certained named clocks.
>> Add this information to the DT binding document.
>>
>> Use clock names as per function for reference clocks.
>>
>> CC: Lee Jones <lee.jones@linaro.org>
>> CC: Samuel Ortiz <sameo@linux.intel.com>
>> Signed-off-by: Roger Quadros <rogerq@ti.com>
>> ---
>>  .../devicetree/bindings/mfd/omap-usb-host.txt      | 23 ++++++++++++++++++++++
>>  drivers/mfd/omap-usb-host.c                        |  6 +++---
>>  2 files changed, 26 insertions(+), 3 deletions(-)
> 
> Please don't mix up binding changes with code ones.
> 
> Separate patch please.
> 
OK.

cheers,
-roger

[PATCH v5 4/9] mfd: omap-usb-tll: Update DT clock binding information

[Roger Quadros]

The omap-usb-tll driver needs one clock for each TLL channel.
Add this information to the DT binding document.

CC: Lee Jones <lee.jones@linaro.org>
CC: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 Documentation/devicetree/bindings/mfd/omap-usb-tll.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt b/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
index 62fe697..c58d704 100644
--- a/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
+++ b/Documentation/devicetree/bindings/mfd/omap-usb-tll.txt
@@ -7,6 +7,16 @@ Required properties:
 - interrupts : should contain the TLL module's interrupt
 - ti,hwmod : must contain "usb_tll_hs"
 
+Optional properties:
+
+- clocks: a list of phandles and clock-specifier pairs, one for each entry in
+  clock-names.
+
+- clock-names: should include:
+  * "usb_tll_hs_usb_ch0_clk" - USB TLL channel 0 clock
+  * "usb_tll_hs_usb_ch1_clk" - USB TLL channel 1 clock
+  * "usb_tll_hs_usb_ch2_clk" - USB TLL channel 2 clock
+
 Example:
 
 	usbhstll: usbhstll@4a062000 {
-- 
1.8.3.2

[PATCH v5 2/9] mfd: omap-usb-host: Get clocks based on hardware revision

[Roger Quadros]

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.

Be more strict and always fail on clk_get() error.

CC: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
CC: Samuel Ortiz <sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
---
 drivers/mfd/omap-usb-host.c | 93 +++++++++++++++++++++++++++++++--------------
 1 file changed, 64 insertions(+), 29 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 1c9bca2..7202cc6 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -92,7 +92,6 @@
 #define is_ehci_tll_mode(x)	(x == OMAP_EHCI_PORT_MODE_TLL)
 #define is_ehci_hsic_mode(x)	(x == OMAP_EHCI_PORT_MODE_HSIC)
 
-
 struct usbhs_hcd_omap {
 	int				nports;
 	struct clk			**utmi_clk;
@@ -665,22 +664,41 @@ 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 = omap->init_60m_fclk = ERR_PTR(-EINVAL);
+	omap->utmi_p1_gfclk = omap->utmi_p2_gfclk = ERR_PTR(-EINVAL);
+	omap->xclk60mhsp1_ck = omap->xclk60mhsp2_ck = ERR_PTR(-EINVAL);
+
 	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(-EINVAL);
+		omap->hsic480m_clk[i] = ERR_PTR(-EINVAL);
+		omap->hsic60m_clk[i] = ERR_PTR(-EINVAL);
 	}
 
-	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 = clk_get(dev, "usbhost_120m_fck");
+			if (IS_ERR(omap->ehci_logic_fck)) {
+				ret = PTR_ERR(omap->ehci_logic_fck);
+				dev_err(dev, "usbhost_120m_fck failed:%d\n",
+					ret);
+				goto err_mem;
+			}
 		}
+		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);
@@ -728,54 +746,71 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 		 * them
 		 */
 		omap->utmi_clk[i] = devm_clk_get(dev, clkname);
-		if (IS_ERR(omap->utmi_clk[i]))
-			dev_dbg(dev, "Failed to get clock : %s : %ld\n",
-				clkname, PTR_ERR(omap->utmi_clk[i]));
+		if (IS_ERR(omap->utmi_clk[i])) {
+			ret = PTR_ERR(omap->utmi_clk[i]);
+			dev_err(dev, "Failed to get clock : %s : %d\n",
+				clkname, ret);
+			goto err_mem;
+		}
 
 		snprintf(clkname, sizeof(clkname),
 				"usb_host_hs_hsic480m_p%d_clk", i + 1);
 		omap->hsic480m_clk[i] = devm_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]));
+		if (IS_ERR(omap->hsic480m_clk[i])) {
+			ret = PTR_ERR(omap->hsic480m_clk[i]);
+			dev_err(dev, "Failed to get clock : %s : %d\n",
+				clkname, ret);
+			goto err_mem;
+		}
 
 		snprintf(clkname, sizeof(clkname),
 				"usb_host_hs_hsic60m_p%d_clk", i + 1);
 		omap->hsic60m_clk[i] = devm_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_ERR(omap->hsic60m_clk[i])) {
+			ret = PTR_ERR(omap->hsic60m_clk[i]);
+			dev_err(dev, "Failed to get clock : %s : %d\n",
+				clkname, ret);
+			goto err_mem;
+		}
 	}
 
 	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)
-			dev_dbg(dev, "xclk60mhsp1_ck set parent failed: %d\n",
+		if (ret != 0) {
+			dev_err(dev, "xclk60mhsp1_ck set parent failed: %d\n",
 					ret);
+			goto err_mem;
+		}
 	} else if (is_ehci_tll_mode(pdata->port_mode[0])) {
 		ret = clk_set_parent(omap->utmi_p1_gfclk,
 					omap->init_60m_fclk);
-		if (ret != 0)
-			dev_dbg(dev, "P0 init_60m_fclk set parent failed: %d\n",
+		if (ret != 0) {
+			dev_err(dev, "P0 init_60m_fclk set parent failed: %d\n",
 					ret);
+			goto err_mem;
+		}
 	}
 
 	if (is_ehci_phy_mode(pdata->port_mode[1])) {
 		ret = clk_set_parent(omap->utmi_p2_gfclk,
 					omap->xclk60mhsp2_ck);
-		if (ret != 0)
-			dev_dbg(dev, "xclk60mhsp2_ck set parent failed: %d\n",
+		if (ret != 0) {
+			dev_err(dev, "xclk60mhsp2_ck set parent failed: %d\n",
 					ret);
+			goto err_mem;
+		}
 	} else if (is_ehci_tll_mode(pdata->port_mode[1])) {
 		ret = clk_set_parent(omap->utmi_p2_gfclk,
 						omap->init_60m_fclk);
-		if (ret != 0)
-			dev_dbg(dev, "P1 init_60m_fclk set parent failed: %d\n",
+		if (ret != 0) {
+			dev_err(dev, "P1 init_60m_fclk set parent failed: %d\n",
 					ret);
+			goto err_mem;
+		}
 	}
 
+initialize:
 	omap_usbhs_init(dev);
 
 	if (dev->of_node) {
-- 
1.8.3.2

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Re: [PATCH v5 2/9] mfd: omap-usb-host: Get clocks based on hardware revision

[Lee Jones]

> 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.
> 
> Be more strict and always fail on clk_get() error.
> 
> CC: Lee Jones <lee.jones@linaro.org>
> CC: Samuel Ortiz <sameo@linux.intel.com>
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> ---
>  drivers/mfd/omap-usb-host.c | 93 +++++++++++++++++++++++++++++++--------------
>  1 file changed, 64 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
> index 1c9bca2..7202cc6 100644
> --- a/drivers/mfd/omap-usb-host.c
> +++ b/drivers/mfd/omap-usb-host.c
> @@ -92,7 +92,6 @@
>  #define is_ehci_tll_mode(x)	(x == OMAP_EHCI_PORT_MODE_TLL)
>  #define is_ehci_hsic_mode(x)	(x == OMAP_EHCI_PORT_MODE_HSIC)
>  
> -

Sneaky! ;)

>  struct usbhs_hcd_omap {
>  	int				nports;
>  	struct clk			**utmi_clk;
> @@ -665,22 +664,41 @@ 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 = omap->init_60m_fclk = ERR_PTR(-EINVAL);
> +	omap->utmi_p1_gfclk = omap->utmi_p2_gfclk = ERR_PTR(-EINVAL);
> +	omap->xclk60mhsp1_ck = omap->xclk60mhsp2_ck = ERR_PTR(-EINVAL);

I don't think this is the correct error code.

-EINVAL means 'invalid parameter'.

You probably want -ENODEV or -ENOSYS ('function not implemented'
probably isn't ideal either tbh, but you get the idea). Perhaps you
can set them as NULL and check for IS_ERR_OR_NULL() instead?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH v5 2/9] mfd: omap-usb-host: Get clocks based on hardware revision

[Arnd Bergmann]

On Friday 10 January 2014, Lee Jones wrote:
> >  
> > -     need_logic_fck = false;
> > +     /* Set all clocks as invalid to begin with */
> > +     omap->ehci_logic_fck = omap->init_60m_fclk = ERR_PTR(-EINVAL);
> > +     omap->utmi_p1_gfclk = omap->utmi_p2_gfclk = ERR_PTR(-EINVAL);
> > +     omap->xclk60mhsp1_ck = omap->xclk60mhsp2_ck = ERR_PTR(-EINVAL);
> 
> I don't think this is the correct error code.
> 
> -EINVAL means 'invalid parameter'.
> 
> You probably want -ENODEV or -ENOSYS ('function not implemented'
> probably isn't ideal either tbh, but you get the idea). Perhaps you
> can set them as NULL and check for IS_ERR_OR_NULL() instead?

I think ENODEV is ok here, I'd much prefer this over IS_ERR_OR_NULL().

	Arnd

Re: [PATCH v5 2/9] mfd: omap-usb-host: Get clocks based on hardware revision

[Lee Jones]

On Fri, 10 Jan 2014, Arnd Bergmann wrote:

> On Friday 10 January 2014, Lee Jones wrote:
> > >  
> > > -     need_logic_fck = false;
> > > +     /* Set all clocks as invalid to begin with */
> > > +     omap->ehci_logic_fck = omap->init_60m_fclk = ERR_PTR(-EINVAL);
> > > +     omap->utmi_p1_gfclk = omap->utmi_p2_gfclk = ERR_PTR(-EINVAL);
> > > +     omap->xclk60mhsp1_ck = omap->xclk60mhsp2_ck = ERR_PTR(-EINVAL);
> > 
> > I don't think this is the correct error code.
> > 
> > -EINVAL means 'invalid parameter'.
> > 
> > You probably want -ENODEV or -ENOSYS ('function not implemented'
> > probably isn't ideal either tbh, but you get the idea). Perhaps you
> > can set them as NULL and check for IS_ERR_OR_NULL() instead?
> 
> I think ENODEV is ok here, I'd much prefer this over IS_ERR_OR_NULL().

Sounds good to me.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH v5 2/9] mfd: omap-usb-host: Get clocks based on hardware revision

[Roger Quadros]

On 01/10/2014 04:26 PM, Lee Jones wrote:
> On Fri, 10 Jan 2014, Arnd Bergmann wrote:
> 
>> On Friday 10 January 2014, Lee Jones wrote:
>>>>  
>>>> -     need_logic_fck = false;
>>>> +     /* Set all clocks as invalid to begin with */
>>>> +     omap->ehci_logic_fck = omap->init_60m_fclk = ERR_PTR(-EINVAL);
>>>> +     omap->utmi_p1_gfclk = omap->utmi_p2_gfclk = ERR_PTR(-EINVAL);
>>>> +     omap->xclk60mhsp1_ck = omap->xclk60mhsp2_ck = ERR_PTR(-EINVAL);
>>>
>>> I don't think this is the correct error code.
>>>
>>> -EINVAL means 'invalid parameter'.
>>>
>>> You probably want -ENODEV or -ENOSYS ('function not implemented'
>>> probably isn't ideal either tbh, but you get the idea). Perhaps you
>>> can set them as NULL and check for IS_ERR_OR_NULL() instead?
>>
>> I think ENODEV is ok here, I'd much prefer this over IS_ERR_OR_NULL().
> 
> Sounds good to me.
> 
OK. Will fix.

cheers,
-roger

[PATCH v5 5/9] ARM: dts: omap4: Update omap-usb-host node

[Roger Quadros]

The omap-usb-host driver expects a certain name for internal
and external reference clocks. Provide these clocks.

Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
---
 arch/arm/boot/dts/omap4.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index d3f8a6e..39a05ce 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -697,6 +697,12 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges;
+			clocks = <&init_60m_fclk>,
+				 <&xclk60mhsp1_ck>,
+				 <&xclk60mhsp2_ck>;
+			clock-names = "refclk_60m_int",
+				      "refclk_60m_ext_p1",
+				      "refclk_60m_ext_p2";
 
 			usbhsohci: ohci@4a064800 {
 				compatible = "ti,ohci-omap3", "usb-ohci";
-- 
1.8.3.2

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[PATCH v5 6/9] ARM: dts: omap5: Update omap-usb-host node

[Roger Quadros]

The omap-usb-host driver expects a certain name for internal
and external reference clocks. Provide these clocks.

Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
---
 arch/arm/boot/dts/omap5.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index 2f12a47..0f82ecf 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -765,6 +765,12 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges;
+			clocks = <&l3init_60m_fclk>,
+				 <&xclk60mhsp1_ck>,
+				 <&xclk60mhsp2_ck>;
+			clock-names = "refclk_60m_int",
+				      "refclk_60m_ext_p1",
+				      "refclk_60m_ext_p2";
 
 			usbhsohci: ohci@4a064800 {
 				compatible = "ti,ohci-omap3", "usb-ohci";
-- 
1.8.3.2

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[PATCH v5 7/9] ARM: dts: omap4-panda: Provide USB PHY clock

[Roger Quadros]

The USB PHY gets its clock from AUXCLK3. Provide this
information.

Signed-off-by: Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>
---
 arch/arm/boot/dts/omap4-panda-common.dtsi | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/omap4-panda-common.dtsi b/arch/arm/boot/dts/omap4-panda-common.dtsi
index 88c6a05..50b72966 100644
--- a/arch/arm/boot/dts/omap4-panda-common.dtsi
+++ b/arch/arm/boot/dts/omap4-panda-common.dtsi
@@ -83,12 +83,8 @@
 		compatible = "usb-nop-xceiv";
 		reset-gpios = <&gpio2 30 GPIO_ACTIVE_LOW>;   /* gpio_62 */
 		vcc-supply = <&hsusb1_power>;
-	/**
-	 * FIXME:
-	 * put the right clock phandle here when available
-	 *	clocks = <&auxclk3>;
-	 *	clock-names = "main_clk";
-	 */
+		clocks = <&auxclk3_ck>;
+		clock-names = "main_clk";
 		clock-frequency = <19200000>;
 	};
 
-- 
1.8.3.2

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[PATCH v5 8/9] ARM: dts: omap5-uevm: Provide USB PHY clock

[Roger Quadros]

The HS USB 2 PHY gets its clock from AUXCLK1. Provide this
information.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 arch/arm/boot/dts/omap5-uevm.dts | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/omap5-uevm.dts b/arch/arm/boot/dts/omap5-uevm.dts
index 002fa70..3b99ec2 100644
--- a/arch/arm/boot/dts/omap5-uevm.dts
+++ b/arch/arm/boot/dts/omap5-uevm.dts
@@ -31,12 +31,8 @@
 	hsusb2_phy: hsusb2_phy {
 		compatible = "usb-nop-xceiv";
 		reset-gpios = <&gpio3 16 GPIO_ACTIVE_LOW>; /* gpio3_80 HUB_NRESET */
-	/**
-	  * FIXME
-	  * Put the right clock phandle here when available
-	  *	clocks = <&auxclk1>;
-	  *	clock-names = "main_clk";
-	  */
+		clocks = <&auxclk1_ck>;
+		clock-names = "main_clk";
 		clock-frequency = <19200000>;
 	};
 
-- 
1.8.3.2

[PATCH v5 9/9] ARM: OMAP2+: Remove legacy_init_ehci_clk()

[Roger Quadros]

The necessary clock phandle for the EHCI clock is now provided
via device tree so we no longer need this legacy method.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
 arch/arm/mach-omap2/pdata-quirks.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 39f020c..6a4e2d1 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -26,20 +26,6 @@ struct pdata_init {
 	void (*fn)(void);
 };
 
-/*
- * Create alias for USB host PHY clock.
- * Remove this when clock phandle can be provided via DT
- */
-static void __init __used legacy_init_ehci_clk(char *clkname)
-{
-	int ret;
-
-	ret = clk_add_alias("main_clk", NULL, clkname, NULL);
-	if (ret)
-		pr_err("%s:Failed to add main_clk alias to %s :%d\n",
-		       __func__, clkname, ret);
-}
-
 #if IS_ENABLED(CONFIG_WL12XX)
 
 static struct wl12xx_platform_data wl12xx __initdata;
@@ -105,7 +91,6 @@ static void __init omap4_sdp_legacy_init(void)
 static void __init omap4_panda_legacy_init(void)
 {
 	omap4_panda_display_init_of();
-	legacy_init_ehci_clk("auxclk3_ck");
 	legacy_init_wl12xx(WL12XX_REFCLOCK_38, 0, 53);
 }
 #endif
@@ -113,7 +98,6 @@ static void __init omap4_panda_legacy_init(void)
 #ifdef CONFIG_SOC_OMAP5
 static void __init omap5_uevm_legacy_init(void)
 {
-	legacy_init_ehci_clk("auxclk1_ck");
 }
 #endif
 
-- 
1.8.3.2