Declare phy_ops structures as const as they are only passed as an
argument to the function devm_phy_create. This argument is of type const
struct phy_ops *, so phy_ops structures having this property can be
declared as const.
Done using Coccinelle:

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct phy_ops i at p = {...};

@ok1@
identifier r1.i;
position p;
@@
devm_phy_create(...,&i at p)

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i at p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct phy_ops i;

File size details:

   text	   data	    bss	    dec	    hex	filename
   1504	    264	      0	   1768	    6e8	phy/phy-bcm-cygnus-pcie.o
   1576	    192	      0	   1768	    6e8	phy/phy-bcm-cygnus-pcie.o

   1083	    264	      0	   1347	    543	phy/phy-hi6220-usb.o
   1155	    192	      0	   1347	    543	phy/phy-hi6220-usb.o

   2767	    264	      0	   3031	    bd7	phy/phy-mt65xx-usb3.o
   2829	    192	      0	   3021	    bcd	phy/phy-mt65xx-usb3.o

   2710	    304	      0	   3014	    bc6	phy/phy-rcar-gen3-usb2.o
   2766	    240	      0	   3006	    bbe	phy/phy-rcar-gen3-usb2.o

Signed-off-by: Bhumika Goyal <redacted>
---
 drivers/phy/phy-bcm-cygnus-pcie.c | 2 +-
 drivers/phy/phy-hi6220-usb.c      | 2 +-
 drivers/phy/phy-mt65xx-usb3.c     | 2 +-
 drivers/phy/phy-rcar-gen3-usb2.c  | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/phy-bcm-cygnus-pcie.c b/drivers/phy/phy-bcm-cygnus-pcie.c
index 082c03f..0f4ac5d 100644
--- a/drivers/phy/phy-bcm-cygnus-pcie.c
+++ b/drivers/phy/phy-bcm-cygnus-pcie.c

@@ -114,7 +114,7 @@ static int cygnus_pcie_phy_power_off(struct phy *p)
 	return cygnus_pcie_power_config(phy, false);
 }
 
-static struct phy_ops cygnus_pcie_phy_ops = {
+static const struct phy_ops cygnus_pcie_phy_ops = {
 	.power_on = cygnus_pcie_phy_power_on,
 	.power_off = cygnus_pcie_phy_power_off,
 	.owner = THIS_MODULE,

diff --git a/drivers/phy/phy-hi6220-usb.c b/drivers/phy/phy-hi6220-usb.c
index b2141cb..398c102 100644
--- a/drivers/phy/phy-hi6220-usb.c
+++ b/drivers/phy/phy-hi6220-usb.c

@@ -112,7 +112,7 @@ static int hi6220_phy_exit(struct phy *phy)
 	return hi6220_phy_setup(priv, false);
 }
 
-static struct phy_ops hi6220_phy_ops = {
+static const struct phy_ops hi6220_phy_ops = {
 	.init		= hi6220_phy_start,
 	.exit		= hi6220_phy_exit,
 	.owner		= THIS_MODULE,

diff --git a/drivers/phy/phy-mt65xx-usb3.c b/drivers/phy/phy-mt65xx-usb3.c
index 4d85e73..d972067 100644
--- a/drivers/phy/phy-mt65xx-usb3.c
+++ b/drivers/phy/phy-mt65xx-usb3.c

@@ -506,7 +506,7 @@ static struct phy *mt65xx_phy_xlate(struct device *dev,
 	return instance->phy;
 }
 
-static struct phy_ops mt65xx_u3phy_ops = {
+static const struct phy_ops mt65xx_u3phy_ops = {
 	.init		= mt65xx_phy_init,
 	.exit		= mt65xx_phy_exit,
 	.power_on	= mt65xx_phy_power_on,

diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
index c63da1b..17be045 100644
--- a/drivers/phy/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/phy-rcar-gen3-usb2.c

@@ -350,7 +350,7 @@ static int rcar_gen3_phy_usb2_power_off(struct phy *p)
 	return ret;
 }
 
-static struct phy_ops rcar_gen3_phy_usb2_ops = {
+static const struct phy_ops rcar_gen3_phy_usb2_ops = {
 	.init		= rcar_gen3_phy_usb2_init,
 	.exit		= rcar_gen3_phy_usb2_exit,
 	.power_on	= rcar_gen3_phy_usb2_power_on,

-- 
1.9.1