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Commit e89e59c0 authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'net-sfp-small-improvements' 



Antoine Tenart says:

====================
net: sfp: small improvements

A small series of patches improving the SFP support by adding a warning
when no Tx disable pin is available, and making the i2c-bus property
mandatory.

Thanks!
Antoine

Since v1:
  - Removed the patch fixing the sfp driver when no i2c bus was described.
  - Made two new patches to make the i2c-bus property mandatory for sfp modules.

Since the phylink series:
  - s/-EOPNOTSUPP/-ENODEV/ in patch 1/2.
  - I added the acked-by tag in patch 2/2.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 47de868b 3e484393

Documentation/devicetree/bindings/net/sff,sfp.txt

+2 −2
Original line number Diff line number Diff line
@@ -7,11 +7,11 @@ Required properties: 
  "sff,sfp" for SFP modules

  "sff,sff" for soldered down SFF modules



Optional Properties:



- i2c-bus : phandle of an I2C bus controller for the SFP two wire serial

  interface



Optional Properties:



- mod-def0-gpios : GPIO phandle and a specifier of the MOD-DEF0 (AKA Mod_ABS)

  module presence input gpio signal, active (module absent) high. Must

  not be present for SFF modules

drivers/net/phy/sfp.c

+24 −13
Original line number Diff line number Diff line
@@ -976,6 +976,7 @@ static int sfp_probe(struct platform_device *pdev) 
	if (pdev->dev.of_node) {

		struct device_node *node = pdev->dev.of_node;

		const struct of_device_id *id;

		struct i2c_adapter *i2c;

		struct device_node *np;



		id = of_match_node(sfp_of_match, node);
@@ -985,8 +986,10 @@ static int sfp_probe(struct platform_device *pdev) 
		sff = sfp->type = id->data;



		np = of_parse_phandle(node, "i2c-bus", 0);

		if (np) {

			struct i2c_adapter *i2c;

		if (!np) {

			dev_err(sfp->dev, "missing 'i2c-bus' property\n");

			return -ENODEV;

		}



		i2c = of_find_i2c_adapter_by_node(np);

		of_node_put(np);
@@ -999,7 +1002,6 @@ static int sfp_probe(struct platform_device *pdev) 
			return err;

		}

	}

	}



	for (i = 0; i < GPIO_MAX; i++)

		if (sff->gpios & BIT(i)) {
@@ -1065,6 +1067,15 @@ static int sfp_probe(struct platform_device *pdev) 
	if (poll)

		mod_delayed_work(system_wq, &sfp->poll, poll_jiffies);



	/* We could have an issue in cases no Tx disable pin is available or

	 * wired as modules using a laser as their light source will continue to

	 * be active when the fiber is removed. This could be a safety issue and

	 * we should at least warn the user about that.

	 */

	if (!sfp->gpio[GPIO_TX_DISABLE])

		dev_warn(sfp->dev,

			 "No tx_disable pin: SFP modules will always be emitting.\n");



	return 0;

}