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authorJohan Hovold <johan@kernel.org>2017-03-30 12:15:42 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2017-06-18 23:58:00 +0200
commite33a3f84f88f13eab6a45c5230c9b9ee9ac78e60 (patch)
treee0ab90a18340569ac3d1a1f37a802738fd6887ea /drivers/nfc
parent0d1ca88bbfdfdad4f6fc0421da5e4ea9a13a0d42 (diff)
NFC: nfcmrvl: allow gpio 0 for reset signalling
Allow gpio 0 to be used for reset signalling, and instead use negative errnos to disable the reset functionality. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc')
-rw-r--r--drivers/nfc/nfcmrvl/main.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/nfc/nfcmrvl/main.c b/drivers/nfc/nfcmrvl/main.c
index a5faa604a3b4..e65d027b91fa 100644
--- a/drivers/nfc/nfcmrvl/main.c
+++ b/drivers/nfc/nfcmrvl/main.c
@@ -123,12 +123,12 @@ struct nfcmrvl_private *nfcmrvl_nci_register_dev(enum nfcmrvl_phy phy,
memcpy(&priv->config, pdata, sizeof(*pdata));
- if (priv->config.reset_n_io) {
+ if (gpio_is_valid(priv->config.reset_n_io)) {
rc = gpio_request_one(priv->config.reset_n_io,
GPIOF_OUT_INIT_LOW,
"nfcmrvl_reset_n");
if (rc < 0) {
- priv->config.reset_n_io = 0;
+ priv->config.reset_n_io = -EINVAL;
nfc_err(dev, "failed to request reset_n io\n");
}
}
@@ -183,7 +183,7 @@ error_fw_dnld_deinit:
error_free_dev:
nci_free_device(priv->ndev);
error_free_gpio:
- if (priv->config.reset_n_io)
+ if (gpio_is_valid(priv->config.reset_n_io))
gpio_free(priv->config.reset_n_io);
kfree(priv);
return ERR_PTR(rc);
@@ -199,7 +199,7 @@ void nfcmrvl_nci_unregister_dev(struct nfcmrvl_private *priv)
nfcmrvl_fw_dnld_deinit(priv);
- if (priv->config.reset_n_io)
+ if (gpio_is_valid(priv->config.reset_n_io))
gpio_free(priv->config.reset_n_io);
nci_unregister_device(ndev);
@@ -267,7 +267,6 @@ int nfcmrvl_parse_dt(struct device_node *node,
reset_n_io = of_get_named_gpio(node, "reset-n-io", 0);
if (reset_n_io < 0) {
pr_info("no reset-n-io config\n");
- reset_n_io = 0;
} else if (!gpio_is_valid(reset_n_io)) {
pr_err("invalid reset-n-io GPIO\n");
return reset_n_io;

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