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Message-Id: <1392302129-24947-4-git-send-email-stefan.sorensen@spectralink.com>
Date: Thu, 13 Feb 2014 15:35:25 +0100
From: Stefan Sørensen
<stefan.sorensen@...ctralink.com>
To: richardcochran@...il.com, grant.likely@...aro.org,
robh+dt@...nel.org, mark.rutland@....com,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org
Cc: Stefan Sørensen
<stefan.sorensen@...ctralink.com>
Subject: [PATCH v3 3/3] net:phy:dp83640: Get pin and master/slave configuration from DT
This patch adds configuration of the periodic output and external timestamp
pins available on the dp83640 family of PHYs. It also configures the
master/slave relationship in a group of PHYs on the same MDIO bus and the pins
used for clock calibration in the group.
The configuration is retrieved from DT through the properties
dp83640,slave
dp83640,calibrate-pin
dp83640,perout-pins
dp83640,extts-pins
The configuration module parameters are retained as fallback for the non-DT
case.
Since the pin configuration is now stored for each clock device, groups of
devices on different mdio busses can now have different pin configurations.
Signed-off-by: Stefan Sørensen <stefan.sorensen@...ctralink.com>
---
Documentation/devicetree/bindings/net/dp83640.txt | 29 +++++
drivers/net/phy/dp83640.c | 139 ++++++++++++++++++----
2 files changed, 143 insertions(+), 25 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/dp83640.txt
diff --git a/Documentation/devicetree/bindings/net/dp83640.txt b/Documentation/devicetree/bindings/net/dp83640.txt
new file mode 100644
index 0000000..b9a57c0
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/dp83640.txt
@@ -0,0 +1,29 @@
+Required properties for the National DP83640 ethernet phy:
+
+- compatible : Must contain "national,dp83640"
+
+Optional properties:
+
+- dp83640,slave: If present, this phy will be slave to another dp83640
+ on the same mdio bus.
+- dp83640,perout-pins : List of the pin pins used for periodic output
+ triggers.
+- dp83640,extts-pins : List of the pin pins used for external event
+ timestamping.
+- dp83640,calibrate-pin : The pin used for master/slave calibration.
+
+Example:
+
+ ethernet-phy@1 {
+ compatible = "national,dp83640", "ethernet-phy-ieee802.3-c22";
+ reg = <1>;
+ dp83640,perout-pins = <2>;
+ dp83640,extts-pins = <3 4 8 9 10 11>;
+ dp83640,calibrate-pin = <1>;
+ };
+
+ ethernet-phy@2 {
+ compatible = "national,dp83640", "ethernet-phy-ieee802.3-c22";
+ reg = <2>;
+ dp83640,slave;
+ };
diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 28a6e1d..077bdc2 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -30,6 +30,7 @@
#include <linux/phy.h>
#include <linux/ptp_classify.h>
#include <linux/ptp_clock_kernel.h>
+#include <linux/of_device.h>
#include "dp83640_reg.h"
@@ -120,6 +121,8 @@ struct dp83640_private {
/* queues of incoming and outgoing packets */
struct sk_buff_head rx_queue;
struct sk_buff_head tx_queue;
+ /* is this phyter a slave */
+ bool slave;
};
struct dp83640_clock {
@@ -141,6 +144,7 @@ struct dp83640_clock {
struct list_head phylist;
/* reference to our PTP hardware clock */
struct ptp_clock *ptp_clock;
+ u32 perout_pins[N_EXT], extts_pins[N_EXT], calibrate_pin;
};
@@ -264,7 +268,7 @@ static void periodic_output(struct dp83640_clock *clock,
u32 sec, nsec, period;
u16 gpio, ptp_trig, val;
- gpio = on ? perout_pins[trigger] : 0;
+ gpio = on ? clock->perout_pins[trigger] : 0;
ptp_trig = TRIG_WR |
(trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT |
@@ -435,12 +439,12 @@ static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
switch (rq->type) {
case PTP_CLK_REQ_EXTTS:
index = rq->extts.index;
- if (index < 0 || index >= n_ext_ts)
+ if (index < 0 || index >= clock->caps.n_ext_ts)
return -EINVAL;
event_num = index;
evnt = EVNT_WR | (event_num & EVNT_SEL_MASK) << EVNT_SEL_SHIFT;
if (on) {
- gpio_num = extts_pins[index];
+ gpio_num = clock->extts_pins[index];
evnt |= (gpio_num & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
if (rq->extts.flags & PTP_FALLING_EDGE)
evnt |= EVNT_FALL;
@@ -452,7 +456,7 @@ static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
case PTP_CLK_REQ_PEROUT:
index = rq->perout.index;
- if (index < 0 || index >= n_per_out)
+ if (index < 0 || index >= clock->caps.n_per_out)
return -EINVAL;
periodic_output(clock, rq, index, on);
return 0;
@@ -573,7 +577,7 @@ static void recalibrate(struct dp83640_clock *clock)
*/
evnt = EVNT_WR | EVNT_RISE | EVNT_SINGLE;
evnt |= (trigger & EVNT_SEL_MASK) << EVNT_SEL_SHIFT;
- evnt |= (calibrate_pin & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
+ evnt |= (clock->calibrate_pin & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
list_for_each(this, &clock->phylist) {
tmp = list_entry(this, struct dp83640_private, list);
@@ -586,7 +590,7 @@ static void recalibrate(struct dp83640_clock *clock)
*/
ptp_trig = TRIG_WR | TRIG_IF_LATE | TRIG_PULSE;
ptp_trig |= (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT;
- ptp_trig |= (calibrate_pin & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT;
+ ptp_trig |= (clock->calibrate_pin & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT;
ext_write(0, master, PAGE5, PTP_TRIG, ptp_trig);
/* load trigger */
@@ -691,7 +695,7 @@ static int decode_evnt(struct dp83640_private *dp83640,
event.type = PTP_CLOCK_EXTTS;
event.timestamp = phy2txts(&dp83640->edata);
- for (i = 0; i < n_ext_ts; i++) {
+ for (i = 0; i < dp83640->clock->caps.n_ext_ts; i++) {
if (ext_status & exts_chan_to_edata(i)) {
event.index = i;
ptp_clock_event(dp83640->clock->ptp_clock, &event);
@@ -893,12 +897,11 @@ static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus)
mutex_init(&clock->extreg_lock);
mutex_init(&clock->clock_lock);
INIT_LIST_HEAD(&clock->phylist);
+ clock->calibrate_pin = -1;
clock->caps.owner = THIS_MODULE;
sprintf(clock->caps.name, "dp83640 timer");
clock->caps.max_adj = 1953124;
clock->caps.n_alarm = 0;
- clock->caps.n_ext_ts = n_ext_ts;
- clock->caps.n_per_out = n_per_out;
clock->caps.pps = 0;
clock->caps.adjfreq = ptp_dp83640_adjfreq;
clock->caps.adjtime = ptp_dp83640_adjtime;
@@ -911,18 +914,6 @@ static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus)
get_device(&bus->dev);
}
-static int choose_this_phy(struct dp83640_clock *clock,
- struct phy_device *phydev)
-{
- if (chosen_phy == -1 && !clock->chosen)
- return 1;
-
- if (chosen_phy == phydev->addr)
- return 1;
-
- return 0;
-}
-
static struct dp83640_clock *dp83640_clock_get(struct dp83640_clock *clock)
{
if (clock)
@@ -968,6 +959,86 @@ static void dp83640_clock_put(struct dp83640_clock *clock)
mutex_unlock(&clock->clock_lock);
}
+#ifdef CONFIG_OF
+static int dp83640_probe_dt(struct device_node *node,
+ struct dp83640_private *dp83640)
+{
+ struct dp83640_clock *clock = dp83640->clock;
+ struct property *prop;
+ int err, proplen, n_cal = 0;
+
+ dp83640->slave = of_property_read_bool(node, "dp83640,slave");
+ if (!dp83640->slave && clock->chosen) {
+ pr_err("More then one dp83640 master on the same bus");
+ return -EINVAL;
+ }
+
+ prop = of_find_property(node, "dp83640,calibrate-pin", &proplen);
+ if (prop) {
+ if (dp83640->slave) {
+ pr_err("dp83640 slave cannot have calibrate pin");
+ return -EINVAL;
+ }
+ of_property_read_u32(node, "dp83640,calibrate-pin",
+ &clock->calibrate_pin);
+ n_cal = 1;
+ }
+
+ prop = of_find_property(node, "dp83640,perout-pins", &proplen);
+ if (prop) {
+ if (dp83640->slave) {
+ pr_err("dp83640 slave cannot have perout pins");
+ return -EINVAL;
+ }
+
+ clock->caps.n_per_out = proplen / sizeof(u32);
+ if (clock->caps.n_per_out + n_cal > N_EXT) {
+ pr_err("Too many dp83640,perout-pins");
+ return -EINVAL;
+ }
+ err = of_property_read_u32_array(node, "dp83640,perout-pins",
+ clock->perout_pins,
+ clock->caps.n_per_out);
+ if (err < 0)
+ return err;
+ }
+
+ prop = of_find_property(node, "dp83640,extts-pins", &proplen);
+ if (prop) {
+ if (dp83640->slave) {
+ pr_err("dp83640 slave cannot have extts pins");
+ return -EINVAL;
+ }
+
+ clock->caps.n_ext_ts = proplen / sizeof(u32);
+ if (clock->caps.n_ext_ts + n_cal > N_EXT) {
+ pr_err("Too many dp83640,extts-pins");
+ return -EINVAL;
+ }
+ err = of_property_read_u32_array(node, "dp83640,extts-pins",
+ clock->extts_pins,
+ clock->caps.n_ext_ts);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static const struct of_device_id dp83640_of_match_table[] = {
+ { .compatible = "national,dp83640", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, dp83640_of_match_table);
+#else
+
+static inline int dp83640_probe_dt(struct device_node *node,
+ struct dp83640_private *dp83640)
+{
+ return 0;
+}
+#endif
+
static int dp83640_probe(struct phy_device *phydev)
{
struct dp83640_clock *clock;
@@ -985,7 +1056,24 @@ static int dp83640_probe(struct phy_device *phydev)
if (!dp83640)
goto no_memory;
+ dp83640->clock = clock;
dp83640->phydev = phydev;
+
+ if (phydev->dev.of_node) {
+ err = dp83640_probe_dt(phydev->dev.of_node, dp83640);
+ if (err)
+ return err;
+ } else {
+ clock->calibrate_pin = calibrate_pin;
+ memcpy(clock->perout_pins, perout_pins,
+ sizeof(clock->perout_pins));
+ memcpy(clock->extts_pins, extts_pins,
+ sizeof(clock->extts_pins));
+ if (clock->chosen ||
+ (chosen_phy != -1 && phydev->addr != chosen_phy))
+ dp83640->slave = true;
+ }
+
INIT_WORK(&dp83640->ts_work, rx_timestamp_work);
INIT_LIST_HEAD(&dp83640->rxts);
@@ -999,9 +1087,7 @@ static int dp83640_probe(struct phy_device *phydev)
skb_queue_head_init(&dp83640->rx_queue);
skb_queue_head_init(&dp83640->tx_queue);
- dp83640->clock = clock;
-
- if (choose_this_phy(clock, phydev)) {
+ if (!dp83640->slave) {
clock->chosen = dp83640;
clock->ptp_clock = ptp_clock_register(&clock->caps, &phydev->dev);
if (IS_ERR(clock->ptp_clock)) {
@@ -1353,7 +1439,10 @@ static struct phy_driver dp83640_driver = {
.hwtstamp = dp83640_hwtstamp,
.rxtstamp = dp83640_rxtstamp,
.txtstamp = dp83640_txtstamp,
- .driver = {.owner = THIS_MODULE,}
+ .driver = {
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(dp83640_of_match_table),
+ }
};
static int __init dp83640_init(void)
--
1.8.5.3
--
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