From: Robert Dolca <robert.dolca@intel.com>
To: linux-nfc@lists.01.org,
Lauro Ramos Venancio <lauro.venancio@openbossa.org>,
Aloisio Almeida Jr <aloisio.almeida@openbossa.org>,
Samuel Ortiz <sameo@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
Berg Johannes <johannes.berg@intel.com>,
Clement Perrochaud <clement.perrochaud@nxp.com>,
Robert Dolca <robert.dolca@intel.com>
Subject: [PATCH v2 1/2] NFC: PN544: GPIO access that may sleep
Date: Mon, 26 Jan 2015 13:13:36 +0200 [thread overview]
Message-ID: <1422270817-10950-2-git-send-email-robert.dolca@intel.com> (raw)
In-Reply-To: <1422270817-10950-1-git-send-email-robert.dolca@intel.com>
gpio_set_value was replaced with gpio_set_value_cansleep in order
to allow GPIO access that may sleep. This is particularelly useful
when GPIO is accessed using busses like I2C, SPI, USB
Signed-off-by: Robert Dolca <robert.dolca@intel.com>
---
drivers/nfc/pn544/i2c.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
index fc02e8d..d9018cd 100644
--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -195,18 +195,19 @@ static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy)
nfc_info(&phy->i2c_dev->dev, "Detecting nfc_en polarity\n");
/* Disable fw download */
- gpio_set_value(phy->gpio_fw, 0);
+ gpio_set_value_cansleep(phy->gpio_fw, 0);
for (polarity = 0; polarity < 2; polarity++) {
phy->en_polarity = polarity;
retry = 3;
while (retry--) {
/* power off */
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en,
+ !phy->en_polarity);
usleep_range(10000, 15000);
/* power on */
- gpio_set_value(phy->gpio_en, phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, phy->en_polarity);
usleep_range(10000, 15000);
/* send reset */
@@ -225,13 +226,14 @@ static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy)
"Could not detect nfc_en polarity, fallback to active high\n");
out:
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
}
static void pn544_hci_i2c_enable_mode(struct pn544_i2c_phy *phy, int run_mode)
{
- gpio_set_value(phy->gpio_fw, run_mode == PN544_FW_MODE ? 1 : 0);
- gpio_set_value(phy->gpio_en, phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_fw,
+ run_mode == PN544_FW_MODE ? 1 : 0);
+ gpio_set_value_cansleep(phy->gpio_en, phy->en_polarity);
usleep_range(10000, 15000);
phy->run_mode = run_mode;
@@ -254,14 +256,14 @@ static void pn544_hci_i2c_disable(void *phy_id)
{
struct pn544_i2c_phy *phy = phy_id;
- gpio_set_value(phy->gpio_fw, 0);
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_fw, 0);
+ gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
usleep_range(10000, 15000);
- gpio_set_value(phy->gpio_en, phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, phy->en_polarity);
usleep_range(10000, 15000);
- gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
usleep_range(10000, 15000);
phy->powered = 0;
--
1.9.1
next prev parent reply other threads:[~2015-01-26 11:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-26 11:13 [PATCH v2 0/2] Add ACPI support for NXP PN544 Robert Dolca
2015-01-26 11:13 ` Robert Dolca [this message]
2015-01-26 11:13 ` [PATCH v2 2/2] NFC: " Robert Dolca
2015-01-27 23:28 ` Samuel Ortiz
2015-02-12 8:14 ` Uwe Kleine-König
2015-02-12 17:48 ` Robert Dolca
2015-02-12 19:26 ` Uwe Kleine-König
2015-01-27 23:29 ` [PATCH v2 0/2] " Samuel Ortiz
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