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usb: host: ohci-generic: add CLOCK support

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use array to save enabled clocks reference in order to
disabled them in case of error during probe() or during
driver removal.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Patrice Chotard 2017-07-18 11:57:12 +02:00 committed by Marek Vasut
parent 0d0ba1a73d
commit 155d9f65d3
1 changed files with 53 additions and 2 deletions
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55
drivers/usb/host/ohci-generic.c
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@ -5,7 +5,9 @@
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dm/ofnode.h>
#include "ohci.h"
#if !defined(CONFIG_USB_OHCI_NEW)
@ -14,18 +16,67 @@
struct generic_ohci {
ohci_t ohci;
struct clk *clocks; /* clock list */
int clock_count; /* number of clock in clock list */
};
static int ohci_usb_probe(struct udevice *dev)
{
struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
struct generic_ohci *priv = dev_get_priv(dev);
int i, err, ret, clock_nb;
return ohci_register(dev, regs);
err = 0;
priv->clock_count = 0;
clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
if (clock_nb > 0) {
priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
GFP_KERNEL);
if (!priv->clocks)
return -ENOMEM;
for (i = 0; i < clock_nb; i++) {
err = clk_get_by_index(dev, i, &priv->clocks[i]);
if (err < 0)
break;
err = clk_enable(&priv->clocks[i]);
if (err) {
error("failed to enable clock %d\n", i);
clk_free(&priv->clocks[i]);
goto clk_err;
}
priv->clock_count++;
}
} else if (clock_nb != -ENOENT) {
error("failed to get clock phandle(%d)\n", clock_nb);
return clock_nb;
}
err = ohci_register(dev, regs);
if (err)
goto clk_err;
return 0;
clk_err:
ret = clk_release_all(priv->clocks, priv->clock_count);
if (ret)
error("failed to disable all clocks\n");
return err;
}
static int ohci_usb_remove(struct udevice *dev)
{
return ohci_deregister(dev);
struct generic_ohci *priv = dev_get_priv(dev);
int ret;
ret = ohci_deregister(dev);
if (ret)
return ret;
return clk_release_all(priv->clocks, priv->clock_count);
}
static const struct udevice_id ohci_usb_ids[] = {