On Sun, Mar 19, 2023 at 7:08 PM Marek Vasut marek.vasut+renesas@mailbox.org wrote:
Add phy_read_mmd_poll_timeout() from Linux 5.7.y as of commit bd971ff0b7392 ("net: phy: introduce phy_read_mmd_poll_timeout macro") This is used by the upcoming Marvell 10G PHY driver.
Signed-off-by: Marek Vasut marek.vasut+renesas@mailbox.org
Cc: "Ariel D'Alessandro" ariel.dalessandro@collabora.com Cc: "Marek Behún" kabel@kernel.org Cc: Joe Hershberger joe.hershberger@ni.com Cc: Marek Vasut marek.vasut+renesas@mailbox.org Cc: Michael Trimarchi michael@amarulasolutions.com Cc: Nate Drude nate.d@variscite.com Cc: Ramon Fried rfried.dev@gmail.com Cc: Simon Glass sjg@chromium.org Cc: Stefan Roese sr@denx.de Cc: Tim Harvey tharvey@gateworks.com Cc: Vladimir Oltean vladimir.oltean@nxp.com
include/phy.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)
diff --git a/include/phy.h b/include/phy.h index 34675b2c9c0..a837fed7235 100644 --- a/include/phy.h +++ b/include/phy.h @@ -282,6 +282,37 @@ static inline ofnode phy_get_ofnode(struct phy_device *phydev) return dev_ofnode(phydev->dev); }
+/**
- phy_read_mmd_poll_timeout - Periodically poll a PHY register until a
condition is met or a timeout occurs
- @phydev: The phy_device struct
- @devaddr: The MMD to read from
- @regnum: The register on the MMD to read
- @val: Variable to read the register into
- @cond: Break condition (usually involving @val)
- @sleep_us: Maximum time to sleep between reads in us (0
tight-loops). Should be less than ~20ms since usleep_range
is used (see Documentation/timers/timers-howto.rst).
- @timeout_us: Timeout in us, 0 means never timeout
- @sleep_before_read: if it is true, sleep @sleep_us before read.
- Returns 0 on success and -ETIMEDOUT upon a timeout. In either
- case, the last read value at @args is stored in @val. Must not
- be called from atomic context if sleep_us or timeout_us are used.
- */
+#define phy_read_mmd_poll_timeout(phydev, devaddr, regnum, val, cond, \
sleep_us, timeout_us, sleep_before_read) \+({ \
int __ret = read_poll_timeout(phy_read_mmd, val, (cond) || val < 0, \sleep_us, timeout_us, \phydev, devaddr, regnum); \if (val < 0) \__ret = val; \if (__ret) \dev_err(phydev->dev, "%s failed: %d\n", __func__, __ret); \__ret; \+})
int phy_read(struct phy_device *phydev, int devad, int regnum); int phy_write(struct phy_device *phydev, int devad, int regnum, u16 val); void phy_mmd_start_indirect(struct phy_device *phydev, int devad, int regnum); -- 2.39.2
Reviewed-by: Ramon Fried rfried.dev@gmail.com