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Subject[PATCH 3/4] usb: musb: da8xx: Add DT support for the DA8xx driver
Date
From: Petr Kulhavy <petr@barix.com>

This adds DT support for TI DA8xx/OMAP-L1x/AM17xx/AM18xx MUSB driver

Signed-off-by: Petr Kulhavy <petr@barix.com>
Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
---
drivers/usb/musb/da8xx.c | 76 ++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 67 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index 210b7e4..d465087 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -6,6 +6,9 @@
* Based on the DaVinci "glue layer" code.
* Copyright (C) 2005-2006 by Texas Instruments
*
+ * DT support
+ * Copyright (c) 2016 Petr Kulhavy <petr@barix.com>
+ *
* This file is part of the Inventra Controller Driver for Linux.
*
* The Inventra Controller Driver for Linux is free software; you
@@ -433,6 +436,21 @@ static int da8xx_musb_exit(struct musb *musb)
return 0;
}

+static inline u8 get_vbus_power(struct device *dev)
+{
+ struct regulator *vbus_supply;
+ int current_uA;
+
+ vbus_supply = regulator_get_optional(dev, "vbus");
+ if (IS_ERR(vbus_supply))
+ return 255;
+ current_uA = regulator_get_current_limit(vbus_supply);
+ regulator_put(vbus_supply);
+ if (current_uA <= 0 || current_uA > 510000)
+ return 255;
+ return current_uA / 1000 / 2;
+}
+
static const struct musb_platform_ops da8xx_ops = {
.quirks = MUSB_DMA_CPPI | MUSB_INDEXED_EP,
.init = da8xx_musb_init,
@@ -458,6 +476,12 @@ static const struct platform_device_info da8xx_dev_info = {
.dma_mask = DMA_BIT_MASK(32),
};

+static const struct musb_hdrc_config da8xx_config = {
+ .ram_bits = 10,
+ .num_eps = 5,
+ .multipoint = 1,
+};
+
static int da8xx_probe(struct platform_device *pdev)
{
struct resource musb_resources[2];
@@ -465,7 +489,9 @@ static int da8xx_probe(struct platform_device *pdev)
struct da8xx_glue *glue;
struct platform_device_info pinfo;
struct clk *clk;
+ struct device_node *np = pdev->dev.of_node;
int ret;
+ struct resource *res;

glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
if (!glue)
@@ -486,6 +512,18 @@ static int da8xx_probe(struct platform_device *pdev)
glue->dev = &pdev->dev;
glue->clk = clk;

+ if (IS_ENABLED(CONFIG_OF) && np) {
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ /* FIXME */
+ return -ENOMEM;
+ }
+
+ pdata->config = &da8xx_config;
+ pdata->mode = musb_get_mode(&pdev->dev);
+ pdata->power = get_vbus_power(&pdev->dev);
+ }
+
pdata->platform_ops = &da8xx_ops;

glue->usb_phy = usb_phy_generic_register();
@@ -499,15 +537,21 @@ static int da8xx_probe(struct platform_device *pdev)
memset(musb_resources, 0x00, sizeof(*musb_resources) *
ARRAY_SIZE(musb_resources));

- musb_resources[0].name = pdev->resource[0].name;
- musb_resources[0].start = pdev->resource[0].start;
- musb_resources[0].end = pdev->resource[0].end;
- musb_resources[0].flags = pdev->resource[0].flags;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to get memory.\n");
+ ret = -EINVAL;
+ goto err_unregister_usb_phy;
+ }
+ musb_resources[0] = *res;

- musb_resources[1].name = pdev->resource[1].name;
- musb_resources[1].start = pdev->resource[1].start;
- musb_resources[1].end = pdev->resource[1].end;
- musb_resources[1].flags = pdev->resource[1].flags;
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to get irq.\n");
+ ret = -EINVAL;
+ goto err_unregister_usb_phy;
+ }
+ musb_resources[1] = *res;

pinfo = da8xx_dev_info;
pinfo.parent = &pdev->dev;
@@ -520,9 +564,14 @@ static int da8xx_probe(struct platform_device *pdev)
ret = PTR_ERR_OR_ZERO(glue->musb);
if (ret) {
dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
- usb_phy_generic_unregister(glue->usb_phy);
+ goto err_unregister_usb_phy;
}

+ return 0;
+
+err_unregister_usb_phy:
+ usb_phy_generic_unregister(glue->usb_phy);
+
return ret;
}

@@ -536,11 +585,20 @@ static int da8xx_remove(struct platform_device *pdev)
return 0;
}

+static const struct of_device_id da8xx_id_table[] = {
+ {
+ .compatible = "ti,da830-musb",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, da8xx_id_table);
+
static struct platform_driver da8xx_driver = {
.probe = da8xx_probe,
.remove = da8xx_remove,
.driver = {
.name = "musb-da8xx",
+ .of_match_table = of_match_ptr(da8xx_id_table),
},
};

--
2.7.3
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