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Date: Tue, 12 Nov 2013 16:51:45 +0200
From: "Ivan T. Ivanov" <iivanov@...sol.com>
To: balbi@...com
Cc: gregkh@...uxfoundation.org, rob.herring@...xeda.com,
pawel.moll@....com, mark.rutland@....com, swarren@...dotorg.org,
ijc+devicetree@...lion.org.uk, davidb@...eaurora.org,
linux-usb@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org,
"Ivan T. Ivanov" <iivanov@...sol.com>, devicetree@...r.kernel.org
Subject: [PATCH v4 10/15] usb: phy: msm: Add device tree support and binding information
From: "Ivan T. Ivanov" <iivanov@...sol.com>
Allows MSM OTG controller to be specified via device tree.
Signed-off-by: Ivan T. Ivanov <iivanov@...sol.com>
Cc: devicetree@...r.kernel.org
---
.../devicetree/bindings/usb/msm-hsusb.txt | 57 +++++++++++++-
drivers/usb/phy/phy-msm-usb.c | 79 +++++++++++++++++---
2 files changed, 124 insertions(+), 12 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/msm-hsusb.txt b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
index 0a85eba..f1045e3 100644
--- a/Documentation/devicetree/bindings/usb/msm-hsusb.txt
+++ b/Documentation/devicetree/bindings/usb/msm-hsusb.txt
@@ -30,4 +30,59 @@ Required properties:
dr_mode = "peripheral";
interrupts = <0 134 0>;
usb-phy = <&usb_otg>;
- };
\ No newline at end of file
+ };
+
+USB PHY with optional OTG:
+
+Required properties:
+- compatible: should contain "qcom,usb-otg-ci" for chipsets with
+ Chipidea 45nm PHY or "qcom,usb-otg-snps" for chipsets
+ with Synopsys 28nm PHY
+- regs: offset and length of the register set in the memory map
+- interrupts: interrupt-specifier for the OTG interrupt.
+
+- clocks: A list of phandle + clock-specifier pairs for the
+ clocks listed in clock-names
+- clock-names: Should contain the following:
+ "phy" USB PHY reference clock
+ "core" Protocol engine clock
+ "iface" Interface bus clock
+ "alt_core" Optional: Protocol engine clock for targets with asynchronous
+ reset methodology.
+
+- dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg"
+
+- vdccx-supply: phandle to the regulator for the vdd supply for
+ digital circuit operation.
+- v1p8-supply: phandle to the regulator for the 1.8V supply
+- v3p3-supply: phandle to the regulator for the 3.3V supply
+
+- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
+ 1 - PHY control
+ 2 - PMIC control
+ 3 - User control (via debugfs)
+
+Optional properties:
+- qcom,phy-init-sequence: PHY configuration sequence. val, reg pairs
+ terminate with -1
+
+Example HSUSB OTG controller device node:
+
+ usb@...55000 {
+ compatible = "qcom,usb-otg-snps";
+ reg = <0xf9a55000 0x400>;
+ interrupts = <0 134 0>;;
+ dr_mode = "peripheral";
+
+ clocks = <&gcc GCC_XO_CLK>, <&gcc GCC_USB_HS_SYSTEM_CLK>,
+ <&gcc GCC_USB_HS_AHB_CLK>;
+
+ clock-names = "phy", "core", "iface";
+
+ vddcx-supply = <&pm8841_s2_corner>;
+ v1p8-supply = <&pm8941_l6>;
+ v3p3-supply = <&pm8941_l24>;
+
+ qcom,otg-control = <1>;
+ qcom,phy-init-sequence = <0x01 0x90 0xffffffff>;
+ };
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index fa8e672d..cc230c8 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -30,9 +30,12 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
+#include <linux/usb/of.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
#include <linux/usb/hcd.h>
@@ -1343,25 +1346,75 @@ static void msm_otg_debugfs_cleanup(void)
debugfs_remove(msm_otg_dbg_root);
}
+static struct of_device_id msm_otg_dt_match[] = {
+ {
+ .compatible = "qcom,usb-otg-ci",
+ .data = (void *) CI_45NM_INTEGRATED_PHY
+ }, {
+ .compatible = "qcom,usb-otg-snps",
+ .data = (void *) SNPS_28NM_INTEGRATED_PHY
+ }, {}
+};
+
+static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
+{
+ struct msm_otg_platform_data *pdata;
+ const struct of_device_id *id;
+ struct device_node *node = pdev->dev.of_node;
+ int len = 0;
+ u32 val;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ motg->pdata = pdata;
+
+ id = of_match_device(msm_otg_dt_match, &pdev->dev);
+ pdata->phy_type = (int) id->data;
+
+ pdata->mode = of_usb_get_dr_mode(node);
+ if (pdata->mode == USB_DR_MODE_UNKNOWN)
+ pdata->mode = USB_DR_MODE_OTG;
+
+ pdata->otg_control = OTG_PHY_CONTROL;
+ if (!of_property_read_u32(node, "qcom,otg-control", &val))
+ pdata->otg_control = val;
+
+ if (!of_get_property(node, "qcom,phy-init-sequence", &len) || !len)
+ return 0;
+
+ pdata->phy_init_seq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!pdata->phy_init_seq)
+ return 0;
+
+ of_property_read_u32_array(node, "qcom,phy-init-sequence",
+ pdata->phy_init_seq,
+ len / sizeof(*pdata->phy_init_seq));
+ return 0;
+}
+
static int __init msm_otg_probe(struct platform_device *pdev)
{
int ret = 0;
+ struct device_node *np = pdev->dev.of_node;
+ struct msm_otg_platform_data *pdata;
struct resource *res;
struct msm_otg *motg;
struct usb_phy *phy;
- dev_info(&pdev->dev, "msm_otg probe\n");
- if (!dev_get_platdata(&pdev->dev)) {
- dev_err(&pdev->dev, "No platform data given. Bailing out\n");
- return -ENODEV;
- }
-
motg = devm_kzalloc(&pdev->dev, sizeof(struct msm_otg), GFP_KERNEL);
if (!motg) {
dev_err(&pdev->dev, "unable to allocate msm_otg\n");
return -ENOMEM;
}
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata)
+ ret = msm_otg_read_dt(pdev, motg);
+ if (ret)
+ return ret;
+
motg->phy.otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
GFP_KERNEL);
if (!motg->phy.otg) {
@@ -1369,17 +1422,17 @@ static int __init msm_otg_probe(struct platform_device *pdev)
return -ENOMEM;
}
- motg->pdata = dev_get_platdata(&pdev->dev);
phy = &motg->phy;
phy->dev = &pdev->dev;
- motg->phy_reset_clk = devm_clk_get(&pdev->dev, "usb_phy_clk");
+ motg->phy_reset_clk = devm_clk_get(&pdev->dev,
+ np ? "phy" : "usb_phy_clk");
if (IS_ERR(motg->phy_reset_clk)) {
dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
return PTR_ERR(motg->phy_reset_clk);
}
- motg->clk = devm_clk_get(&pdev->dev, "usb_hs_clk");
+ motg->clk = devm_clk_get(&pdev->dev, np ? "core" : "usb_hs_clk");
if (IS_ERR(motg->clk)) {
dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
return PTR_ERR(motg->clk);
@@ -1391,7 +1444,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)
* operation and USB core cannot tolerate frequency changes on
* CORE CLK.
*/
- motg->pclk = devm_clk_get(&pdev->dev, "usb_hs_pclk");
+ motg->pclk = devm_clk_get(&pdev->dev, np ? "iface" : "usb_hs_pclk");
if (IS_ERR(motg->pclk)) {
dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
return PTR_ERR(motg->pclk);
@@ -1402,7 +1455,8 @@ static int __init msm_otg_probe(struct platform_device *pdev)
* clock is introduced to remove the dependency on AXI
* bus frequency.
*/
- motg->core_clk = devm_clk_get(&pdev->dev, "usb_hs_core_clk");
+ motg->core_clk = devm_clk_get(&pdev->dev,
+ np ? "alt_core" : "usb_hs_core_clk");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
@@ -1639,6 +1693,8 @@ static const struct dev_pm_ops msm_otg_dev_pm_ops = {
};
#endif
+MODULE_DEVICE_TABLE(of, msm_otg_dt_match);
+
static struct platform_driver msm_otg_driver = {
.probe = msm_otg_probe,
.remove = msm_otg_remove,
@@ -1648,6 +1704,7 @@ static struct platform_driver msm_otg_driver = {
#ifdef CONFIG_PM
.pm = &msm_otg_dev_pm_ops,
#endif
+ .of_match_table = msm_otg_dt_match,
},
};
--
1.7.9.5
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