52 lines
2.0 KiB
Diff
52 lines
2.0 KiB
Diff
From 615090acb3c0b41691f3a03522ea38350387c0e4 Mon Sep 17 00:00:00 2001
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From: Russell King <rmk+kernel@armlinux.org.uk>
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Date: Tue, 15 Oct 2019 10:54:15 +0100
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Subject: [PATCH 622/660] net: sfp: rename T_PROBE_WAIT to T_SERIAL
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SFF-8472 rev 12.2 defines the time for the serial bus to become ready
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using t_serial. Use this as our identifier for this timeout to make
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it clear what we are referring to.
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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---
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drivers/net/phy/sfp.c | 13 ++++++-------
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1 file changed, 6 insertions(+), 7 deletions(-)
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--- a/drivers/net/phy/sfp.c
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+++ b/drivers/net/phy/sfp.c
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@@ -149,11 +149,10 @@ static const enum gpiod_flags gpio_flags
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* the same length on the PCB, which means it's possible for MOD DEF 0 to
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* connect before the I2C bus on MOD DEF 1/2.
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*
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- * The SFP MSA specifies 300ms as t_init (the time taken for TX_FAULT to
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- * be deasserted) but makes no mention of the earliest time before we can
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- * access the I2C EEPROM. However, Avago modules require 300ms.
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+ * The SFF-8472 specifies t_serial ("Time from power on until module is
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+ * ready for data transmission over the two wire serial bus.") as 300ms.
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*/
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-#define T_PROBE_INIT msecs_to_jiffies(300)
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+#define T_SERIAL msecs_to_jiffies(300)
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#define T_HPOWER_LEVEL msecs_to_jiffies(300)
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#define T_PROBE_RETRY msecs_to_jiffies(100)
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@@ -1560,8 +1559,8 @@ static void sfp_sm_device(struct sfp *sf
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}
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}
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-/* This state machine tracks the insert/remove state of
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- * the module, and handles probing the on-board EEPROM.
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+/* This state machine tracks the insert/remove state of the module, probes
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+ * the on-board EEPROM, and sets up the power level.
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*/
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static void sfp_sm_module(struct sfp *sfp, unsigned int event)
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{
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@@ -1577,7 +1576,7 @@ static void sfp_sm_module(struct sfp *sf
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default:
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if (event == SFP_E_INSERT && sfp->attached) {
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sfp_module_tx_disable(sfp);
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- sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_PROBE_INIT);
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+ sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL);
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}
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break;
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