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usb: host: dwc2: add clk support

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Add support for clock with driver model.

This patch don't added dependency because when CONFIG_CLK
is not activated the clk function are stubbed.

Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2020-04-27 15:29:59 +02:00 committed by Marek Vasut
parent e17a4bf198
commit 0bc632c9b1
1 changed files with 29 additions and 1 deletions
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30
drivers/usb/host/dwc2.c
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@ -5,14 +5,15 @@
*/
#include <common.h>
#include <clk.h>
#include <cpu_func.h>
#include <dm.h>
#include <errno.h>
#include <generic-phy.h>
#include <usb.h>
#include <malloc.h>
#include <memalign.h>
#include <phys2bus.h>
#include <usb.h>
#include <usbroothubdes.h>
#include <wait_bit.h>
#include <asm/io.h>
@ -39,6 +40,7 @@ struct dwc2_priv {
struct udevice *vbus_supply;
#endif
struct phy phy;
struct clk_bulk clks;
#else
uint8_t *aligned_buffer;
uint8_t *status_buffer;
@ -1377,6 +1379,26 @@ static int dwc2_shutdown_phy(struct udevice *dev)
return 0;
}
static int dwc2_clk_init(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
int ret;
ret = clk_get_bulk(dev, &priv->clks);
if (ret == -ENOSYS || ret == -ENOENT)
return 0;
if (ret)
return ret;
ret = clk_enable_bulk(&priv->clks);
if (ret) {
clk_release_bulk(&priv->clks);
return ret;
}
return 0;
}
static int dwc2_usb_probe(struct udevice *dev)
{
struct dwc2_priv *priv = dev_get_priv(dev);
@ -1385,6 +1407,10 @@ static int dwc2_usb_probe(struct udevice *dev)
bus_priv->desc_before_addr = true;
ret = dwc2_clk_init(dev);
if (ret)
return ret;
ret = dwc2_setup_phy(dev);
if (ret)
return ret;
@ -1410,6 +1436,8 @@ static int dwc2_usb_remove(struct udevice *dev)
dwc2_uninit_common(priv->regs);
reset_release_bulk(&priv->resets);
clk_disable_bulk(&priv->clks);
clk_release_bulk(&priv->clks);
return 0;
}