diff options
| author | Patrice Chotard <patrice.chotard@st.com> | 2017-07-18 11:57:13 +0200 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2017-07-28 23:34:13 +0200 |
| commit | 8a51b4b3dac35a18acca2538efe2c2979aa56417 (patch) | |
| tree | 2852e99e1d65c303d6935a523f3439cab6bf8f7d /drivers | |
| parent | 155d9f65d3bf78cc7113475110c129dc0dbbdae1 (diff) | |
usb: host: ohci-generic: add RESET support
use array to save deasserted resets reference in order to
assert 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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/host/ohci-generic.c | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/drivers/usb/host/ohci-generic.c b/drivers/usb/host/ohci-generic.c index f5b27ccf31..95d54c1f09 100644 --- a/drivers/usb/host/ohci-generic.c +++ b/drivers/usb/host/ohci-generic.c @@ -8,6 +8,7 @@ #include <clk.h> #include <dm.h> #include <dm/ofnode.h> +#include <reset.h> #include "ohci.h" #if !defined(CONFIG_USB_OHCI_NEW) @@ -17,14 +18,16 @@ struct generic_ohci { ohci_t ohci; struct clk *clocks; /* clock list */ + struct reset_ctl *resets; /* reset list */ int clock_count; /* number of clock in clock list */ + int reset_count; /* number of reset in reset 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; + int i, err, ret, clock_nb, reset_nb; err = 0; priv->clock_count = 0; @@ -53,12 +56,43 @@ static int ohci_usb_probe(struct udevice *dev) return clock_nb; } + priv->reset_count = 0; + reset_nb = dev_count_phandle_with_args(dev, "resets", "#reset-cells"); + if (reset_nb > 0) { + priv->resets = devm_kcalloc(dev, reset_nb, + sizeof(struct reset_ctl), + GFP_KERNEL); + if (!priv->resets) + return -ENOMEM; + + for (i = 0; i < reset_nb; i++) { + err = reset_get_by_index(dev, i, &priv->resets[i]); + if (err < 0) + break; + + err = reset_deassert(&priv->resets[i]); + if (err) { + error("failed to deassert reset %d\n", i); + reset_free(&priv->resets[i]); + goto reset_err; + } + priv->reset_count++; + } + } else if (reset_nb != -ENOENT) { + error("failed to get reset phandle(%d)\n", reset_nb); + goto clk_err; + } + err = ohci_register(dev, regs); if (err) - goto clk_err; + goto reset_err; return 0; +reset_err: + ret = reset_release_all(priv->resets, priv->reset_count); + if (ret) + error("failed to assert all resets\n"); clk_err: ret = clk_release_all(priv->clocks, priv->clock_count); if (ret) @@ -76,6 +110,10 @@ static int ohci_usb_remove(struct udevice *dev) if (ret) return ret; + ret = reset_release_all(priv->resets, priv->reset_count); + if (ret) + return ret; + return clk_release_all(priv->clocks, priv->clock_count); } |