[PATCH net-next v2 0/3] net: stmmac: qcon-ethqos: "rgmii" accessor cleanups

[PATCH net-next v2 0/3] net: stmmac: qcon-ethqos: "rgmii" accessor cleanups

[Russell King (Oracle)]

This series cleans up the "rgmii" accessors in qcom-ethqos.

readl() and writel() return and take a u32 for the value. Rather than
implicitly casting this to an int, keep it as a u32.

Add set/clear functions to reduce the code and make it easier to read.

Finally, convert the open-coded poll loops to use the iopoll helpers.

Note that patch 1 has a checkpatch warning concerning "volatile" - I'm
changing the type here, and the "volatile" is removed in patch 3. I do
not feel it is appropriate to remove it in patch 1.

v2:
 - remove double-spaces in patch 2.

 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c    | 245 +++++++++------------
 1 file changed, 110 insertions(+), 135 deletions(-)

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

[PATCH net-next v2 1/3] net: stmmac: qcom-ethqos: use u32 for rgmii read/write/update

[Russell King (Oracle)]

readl() returns a u32, and writel() takes a "u32" for the value. These
are used in rgmii_readl()() and rgmii_writel(), but the value and
return are "int". As these are 32-bit register values which are not
signed, use "u32".

These changes do not cause generated code changes.

Update rgmii_updatel() to use u32 for mask and val. Changing "mask"
to "u32" also does not cause generated code changes. However, changing
"val" causes the generated assembly to be re-ordered for aarch64.

Update the temporary variables used with the rgmii functions to use
u32.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 .../ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c  | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 1a616a71c36a..ae3cf163005b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -116,21 +116,21 @@ struct qcom_ethqos {
 	bool needs_sgmii_loopback;
 };
 
-static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)
+static u32 rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)
 {
 	return readl(ethqos->rgmii_base + offset);
 }
 
-static void rgmii_writel(struct qcom_ethqos *ethqos,
-			 int value, unsigned int offset)
+static void rgmii_writel(struct qcom_ethqos *ethqos, u32 value,
+			 unsigned int offset)
 {
 	writel(value, ethqos->rgmii_base + offset);
 }
 
-static void rgmii_updatel(struct qcom_ethqos *ethqos,
-			  int mask, int val, unsigned int offset)
+static void rgmii_updatel(struct qcom_ethqos *ethqos, u32 mask, u32 val,
+			  unsigned int offset)
 {
-	unsigned int temp;
+	u32 temp;
 
 	temp = rgmii_readl(ethqos, offset);
 	temp = (temp & ~(mask)) | val;
@@ -300,8 +300,8 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
 static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 {
 	struct device *dev = &ethqos->pdev->dev;
-	unsigned int val;
 	int retry = 1000;
+	u32 val;
 
 	/* Set CDR_EN */
 	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EN,
@@ -535,7 +535,7 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
 static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos, int speed)
 {
 	struct device *dev = &ethqos->pdev->dev;
-	volatile unsigned int dll_lock;
+	volatile u32 dll_lock;
 	unsigned int i, retry = 1000;
 
 	/* Reset to POR values and enable clk */
-- 
2.47.3

[PATCH net-next v2 2/3] net: stmmac: qcom-ethqos: add rgmii set/clear functions

[Russell King (Oracle)]

The driver has a lot of bit manipulation of the RGMII registers. Add
a pair of helpers to set bits and clear bits, converting the various
calls to rgmii_updatel() as appropriate.

Most of the change was done via this sed script:

/rgmii_updatel/ {
	N
	/,$/N
	/mask, / ! {
		s|rgmii_updatel\(([^,]*,\s+([^,]*),\s+)\2,\s+|rgmii_setmask(\1|
		s|rgmii_updatel\(([^,]*,\s+([^,]*),\s+)0,\s+|rgmii_clrmask(\1|
		s|^\s+$||
	}
}

and then formatting tweaked where necessary.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 .../stmicro/stmmac/dwmac-qcom-ethqos.c        | 187 +++++++++---------
 1 file changed, 89 insertions(+), 98 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index ae3cf163005b..1f84bd821c4e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -137,6 +137,18 @@ static void rgmii_updatel(struct qcom_ethqos *ethqos, u32 mask, u32 val,
 	rgmii_writel(ethqos, temp, offset);
 }
 
+static void rgmii_setmask(struct qcom_ethqos *ethqos, u32 mask,
+			  unsigned int offset)
+{
+	rgmii_updatel(ethqos, mask, mask, offset);
+}
+
+static void rgmii_clrmask(struct qcom_ethqos *ethqos, u32 mask,
+			  unsigned int offset)
+{
+	rgmii_updatel(ethqos, mask, 0, offset);
+}
+
 static void rgmii_dump(void *priv)
 {
 	struct qcom_ethqos *ethqos = priv;
@@ -194,8 +206,7 @@ qcom_ethqos_set_sgmii_loopback(struct qcom_ethqos *ethqos, bool enable)
 static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos)
 {
 	qcom_ethqos_set_sgmii_loopback(ethqos, true);
-	rgmii_updatel(ethqos, RGMII_CONFIG_FUNC_CLK_EN,
-		      RGMII_CONFIG_FUNC_CLK_EN, RGMII_IO_MACRO_CONFIG);
+	rgmii_setmask(ethqos, RGMII_CONFIG_FUNC_CLK_EN, RGMII_IO_MACRO_CONFIG);
 }
 
 static const struct ethqos_emac_por emac_v2_3_0_por[] = {
@@ -304,27 +315,25 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 	u32 val;
 
 	/* Set CDR_EN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EN,
-		      SDCC_DLL_CONFIG_CDR_EN, SDCC_HC_REG_DLL_CONFIG);
+	rgmii_setmask(ethqos, SDCC_DLL_CONFIG_CDR_EN, SDCC_HC_REG_DLL_CONFIG);
 
 	/* Set CDR_EXT_EN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EXT_EN,
-		      SDCC_DLL_CONFIG_CDR_EXT_EN, SDCC_HC_REG_DLL_CONFIG);
+	rgmii_setmask(ethqos, SDCC_DLL_CONFIG_CDR_EXT_EN,
+		      SDCC_HC_REG_DLL_CONFIG);
 
 	/* Clear CK_OUT_EN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
-		      0, SDCC_HC_REG_DLL_CONFIG);
+	rgmii_clrmask(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+		      SDCC_HC_REG_DLL_CONFIG);
 
 	/* Set DLL_EN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
-		      SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
+	rgmii_setmask(ethqos, SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
 
 	if (!ethqos->has_emac_ge_3) {
-		rgmii_updatel(ethqos, SDCC_DLL_MCLK_GATING_EN,
-			      0, SDCC_HC_REG_DLL_CONFIG);
+		rgmii_clrmask(ethqos, SDCC_DLL_MCLK_GATING_EN,
+			      SDCC_HC_REG_DLL_CONFIG);
 
-		rgmii_updatel(ethqos, SDCC_DLL_CDR_FINE_PHASE,
-			      0, SDCC_HC_REG_DLL_CONFIG);
+		rgmii_clrmask(ethqos, SDCC_DLL_CDR_FINE_PHASE,
+			      SDCC_HC_REG_DLL_CONFIG);
 	}
 
 	/* Wait for CK_OUT_EN clear */
@@ -340,8 +349,8 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 		dev_err(dev, "Clear CK_OUT_EN timedout\n");
 
 	/* Set CK_OUT_EN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
-		      SDCC_DLL_CONFIG_CK_OUT_EN, SDCC_HC_REG_DLL_CONFIG);
+	rgmii_setmask(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+		      SDCC_HC_REG_DLL_CONFIG);
 
 	/* Wait for CK_OUT_EN set */
 	retry = 1000;
@@ -357,12 +366,12 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 		dev_err(dev, "Set CK_OUT_EN timedout\n");
 
 	/* Set DDR_CAL_EN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_CAL_EN,
-		      SDCC_DLL_CONFIG2_DDR_CAL_EN, SDCC_HC_REG_DLL_CONFIG2);
+	rgmii_setmask(ethqos, SDCC_DLL_CONFIG2_DDR_CAL_EN,
+		      SDCC_HC_REG_DLL_CONFIG2);
 
 	if (!ethqos->has_emac_ge_3) {
-		rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DLL_CLOCK_DIS,
-			      0, SDCC_HC_REG_DLL_CONFIG2);
+		rgmii_clrmask(ethqos, SDCC_DLL_CONFIG2_DLL_CLOCK_DIS,
+			      SDCC_HC_REG_DLL_CONFIG2);
 
 		rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_MCLK_FREQ_CALC,
 			      0x1A << 10, SDCC_HC_REG_DLL_CONFIG2);
@@ -370,8 +379,7 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 		rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL,
 			      BIT(2), SDCC_HC_REG_DLL_CONFIG2);
 
-		rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
-			      SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
+		rgmii_setmask(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
 			      SDCC_HC_REG_DLL_CONFIG2);
 	}
 
@@ -392,8 +400,8 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
 		phase_shift = RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN;
 
 	/* Disable loopback mode */
-	rgmii_updatel(ethqos, RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN,
-		      0, RGMII_IO_MACRO_CONFIG2);
+	rgmii_clrmask(ethqos, RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN,
+		      RGMII_IO_MACRO_CONFIG2);
 
 	/* Determine if this platform wants loopback enabled after programming */
 	if (ethqos->rgmii_config_loopback_en)
@@ -402,29 +410,26 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
 		loopback = 0;
 
 	/* Select RGMII, write 0 to interface select */
-	rgmii_updatel(ethqos, RGMII_CONFIG_INTF_SEL,
-		      0, RGMII_IO_MACRO_CONFIG);
+	rgmii_clrmask(ethqos, RGMII_CONFIG_INTF_SEL, RGMII_IO_MACRO_CONFIG);
 
 	switch (speed) {
 	case SPEED_1000:
-		rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
-			      RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
-			      0, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
-			      RGMII_CONFIG_POS_NEG_DATA_SEL,
+		rgmii_setmask(ethqos, RGMII_CONFIG_DDR_MODE,
 			      RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
-			      RGMII_CONFIG_PROG_SWAP, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
-			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_clrmask(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_setmask(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_setmask(ethqos, RGMII_CONFIG_PROG_SWAP,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_clrmask(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+			      RGMII_IO_MACRO_CONFIG2);
 
 		rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
 			      phase_shift, RGMII_IO_MACRO_CONFIG2);
-		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
-			      0, RGMII_IO_MACRO_CONFIG2);
-		rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
-			      RGMII_CONFIG2_RX_PROG_SWAP,
+		rgmii_clrmask(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+			      RGMII_IO_MACRO_CONFIG2);
+		rgmii_setmask(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
 			      RGMII_IO_MACRO_CONFIG2);
 
 		/* PRG_RCLK_DLY = TCXO period * TCXO_CYCLES_CNT / 2 * RX delay ns,
@@ -439,87 +444,78 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
 			rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_RCLK_DLY,
 				      57, SDCC_HC_REG_DDR_CONFIG);
 		}
-		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN,
-			      SDCC_DDR_CONFIG_PRG_DLY_EN,
+		rgmii_setmask(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN,
 			      SDCC_HC_REG_DDR_CONFIG);
 		rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
 			      loopback, RGMII_IO_MACRO_CONFIG);
 		break;
 
 	case SPEED_100:
-		rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
-			      RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
-			      RGMII_CONFIG_BYPASS_TX_ID_EN,
+		rgmii_setmask(ethqos, RGMII_CONFIG_DDR_MODE,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_setmask(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_clrmask(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
 			      RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
-			      0, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
-			      0, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
-			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_clrmask(ethqos, RGMII_CONFIG_PROG_SWAP,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_clrmask(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+			      RGMII_IO_MACRO_CONFIG2);
 		rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
 			      phase_shift, RGMII_IO_MACRO_CONFIG2);
 		rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_2,
 			      BIT(6), RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
-			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_clrmask(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+			      RGMII_IO_MACRO_CONFIG2);
 
 		if (ethqos->has_emac_ge_3)
-			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
-				      RGMII_CONFIG2_RX_PROG_SWAP,
+			rgmii_setmask(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
 				      RGMII_IO_MACRO_CONFIG2);
 		else
-			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
-				      0, RGMII_IO_MACRO_CONFIG2);
+			rgmii_clrmask(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+				      RGMII_IO_MACRO_CONFIG2);
 
 		/* Write 0x5 to PRG_RCLK_DLY_CODE */
 		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
 			      (BIT(29) | BIT(27)), SDCC_HC_REG_DDR_CONFIG);
-		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
-			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+		rgmii_setmask(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
 			      SDCC_HC_REG_DDR_CONFIG);
-		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
-			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+		rgmii_setmask(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
 			      SDCC_HC_REG_DDR_CONFIG);
 		rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
 			      loopback, RGMII_IO_MACRO_CONFIG);
 		break;
 
 	case SPEED_10:
-		rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
-			      RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
-			      RGMII_CONFIG_BYPASS_TX_ID_EN,
+		rgmii_setmask(ethqos, RGMII_CONFIG_DDR_MODE,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_setmask(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_clrmask(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
 			      RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
-			      0, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
-			      0, RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
-			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_clrmask(ethqos, RGMII_CONFIG_PROG_SWAP,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_clrmask(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+			      RGMII_IO_MACRO_CONFIG2);
 		rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
 			      phase_shift, RGMII_IO_MACRO_CONFIG2);
 		rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_9,
 			      BIT(12) | GENMASK(9, 8),
 			      RGMII_IO_MACRO_CONFIG);
-		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
-			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_clrmask(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+			      RGMII_IO_MACRO_CONFIG2);
 		if (ethqos->has_emac_ge_3)
-			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
-				      RGMII_CONFIG2_RX_PROG_SWAP,
+			rgmii_setmask(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
 				      RGMII_IO_MACRO_CONFIG2);
 		else
-			rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
-				      0, RGMII_IO_MACRO_CONFIG2);
+			rgmii_clrmask(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+				      RGMII_IO_MACRO_CONFIG2);
 		/* Write 0x5 to PRG_RCLK_DLY_CODE */
 		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
 			      (BIT(29) | BIT(27)), SDCC_HC_REG_DDR_CONFIG);
-		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
-			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+		rgmii_setmask(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
 			      SDCC_HC_REG_DDR_CONFIG);
-		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
-			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+		rgmii_setmask(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
 			      SDCC_HC_REG_DDR_CONFIG);
 		rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
 			      loopback, RGMII_IO_MACRO_CONFIG);
@@ -547,12 +543,12 @@ static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos, int speed)
 	/* Initialize the DLL first */
 
 	/* Set DLL_RST */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_RST,
-		      SDCC_DLL_CONFIG_DLL_RST, SDCC_HC_REG_DLL_CONFIG);
+	rgmii_setmask(ethqos, SDCC_DLL_CONFIG_DLL_RST,
+		      SDCC_HC_REG_DLL_CONFIG);
 
 	/* Set PDN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_PDN,
-		      SDCC_DLL_CONFIG_PDN, SDCC_HC_REG_DLL_CONFIG);
+	rgmii_setmask(ethqos, SDCC_DLL_CONFIG_PDN,
+		      SDCC_HC_REG_DLL_CONFIG);
 
 	if (ethqos->has_emac_ge_3) {
 		if (speed == SPEED_1000) {
@@ -566,21 +562,18 @@ static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos, int speed)
 	}
 
 	/* Clear DLL_RST */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_RST, 0,
-		      SDCC_HC_REG_DLL_CONFIG);
+	rgmii_clrmask(ethqos, SDCC_DLL_CONFIG_DLL_RST, SDCC_HC_REG_DLL_CONFIG);
 
 	/* Clear PDN */
-	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_PDN, 0,
-		      SDCC_HC_REG_DLL_CONFIG);
+	rgmii_clrmask(ethqos, SDCC_DLL_CONFIG_PDN, SDCC_HC_REG_DLL_CONFIG);
 
 	if (speed != SPEED_100 && speed != SPEED_10) {
 		/* Set DLL_EN */
-		rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
-			      SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
+		rgmii_setmask(ethqos, SDCC_DLL_CONFIG_DLL_EN,
+			      SDCC_HC_REG_DLL_CONFIG);
 
 		/* Set CK_OUT_EN */
-		rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
-			      SDCC_DLL_CONFIG_CK_OUT_EN,
+		rgmii_setmask(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
 			      SDCC_HC_REG_DLL_CONFIG);
 
 		/* Set USR_CTL bit 26 with mask of 3 bits */
@@ -631,15 +624,13 @@ static int ethqos_configure_sgmii(struct qcom_ethqos *ethqos, int speed)
 
 	switch (speed) {
 	case SPEED_2500:
-		rgmii_updatel(ethqos, RGMII_CONFIG2_RGMII_CLK_SEL_CFG,
-			      RGMII_CONFIG2_RGMII_CLK_SEL_CFG,
+		rgmii_setmask(ethqos, RGMII_CONFIG2_RGMII_CLK_SEL_CFG,
 			      RGMII_IO_MACRO_CONFIG2);
 		ethqos_set_serdes_speed(ethqos, SPEED_2500);
 		ethqos_pcs_set_inband(priv, false);
 		break;
 	case SPEED_1000:
-		rgmii_updatel(ethqos, RGMII_CONFIG2_RGMII_CLK_SEL_CFG,
-			      RGMII_CONFIG2_RGMII_CLK_SEL_CFG,
+		rgmii_setmask(ethqos, RGMII_CONFIG2_RGMII_CLK_SEL_CFG,
 			      RGMII_IO_MACRO_CONFIG2);
 		ethqos_set_serdes_speed(ethqos, SPEED_1000);
 		ethqos_pcs_set_inband(priv, true);
-- 
2.47.3

[PATCH net-next v2 3/3] net: stmmac: qcom-ethqos: use read_poll_timeout_atomic()

[Russell King (Oracle)]

Use read_poll_timeout_atomic() to poll the rgmii registers rather than
open-coding the polling.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 .../stmicro/stmmac/dwmac-qcom-ethqos.c        | 44 ++++++-------------
 1 file changed, 14 insertions(+), 30 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
index 1f84bd821c4e..0826a7bd32ff 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -311,7 +311,6 @@ static const struct ethqos_emac_driver_data emac_v4_0_0_data = {
 static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 {
 	struct device *dev = &ethqos->pdev->dev;
-	int retry = 1000;
 	u32 val;
 
 	/* Set CDR_EN */
@@ -337,15 +336,10 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 	}
 
 	/* Wait for CK_OUT_EN clear */
-	do {
-		val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
-		val &= SDCC_DLL_CONFIG_CK_OUT_EN;
-		if (!val)
-			break;
-		mdelay(1);
-		retry--;
-	} while (retry > 0);
-	if (!retry)
+	if (read_poll_timeout_atomic(rgmii_readl, val,
+				     !(val & SDCC_DLL_CONFIG_CK_OUT_EN),
+				     1000, 1000000, false,
+				     ethqos, SDCC_HC_REG_DLL_CONFIG))
 		dev_err(dev, "Clear CK_OUT_EN timedout\n");
 
 	/* Set CK_OUT_EN */
@@ -353,16 +347,10 @@ static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
 		      SDCC_HC_REG_DLL_CONFIG);
 
 	/* Wait for CK_OUT_EN set */
-	retry = 1000;
-	do {
-		val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
-		val &= SDCC_DLL_CONFIG_CK_OUT_EN;
-		if (val)
-			break;
-		mdelay(1);
-		retry--;
-	} while (retry > 0);
-	if (!retry)
+	if (read_poll_timeout_atomic(rgmii_readl, val,
+				     val & SDCC_DLL_CONFIG_CK_OUT_EN,
+				     1000, 1000000, false,
+				     ethqos, SDCC_HC_REG_DLL_CONFIG))
 		dev_err(dev, "Set CK_OUT_EN timedout\n");
 
 	/* Set DDR_CAL_EN */
@@ -531,8 +519,8 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos, int speed)
 static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos, int speed)
 {
 	struct device *dev = &ethqos->pdev->dev;
-	volatile u32 dll_lock;
-	unsigned int i, retry = 1000;
+	unsigned int i;
+	u32 val;
 
 	/* Reset to POR values and enable clk */
 	for (i = 0; i < ethqos->num_por; i++)
@@ -582,14 +570,10 @@ static int ethqos_configure_rgmii(struct qcom_ethqos *ethqos, int speed)
 				      SDCC_USR_CTL);
 
 		/* wait for DLL LOCK */
-		do {
-			mdelay(1);
-			dll_lock = rgmii_readl(ethqos, SDC4_STATUS);
-			if (dll_lock & SDC4_STATUS_DLL_LOCK)
-				break;
-			retry--;
-		} while (retry > 0);
-		if (!retry)
+		if (read_poll_timeout_atomic(rgmii_readl, val,
+					     val & SDC4_STATUS_DLL_LOCK,
+					     1000, 1000000, true,
+					     ethqos, SDC4_STATUS))
 			dev_err(dev, "Timeout while waiting for DLL lock\n");
 	}
 
-- 
2.47.3

Re: [PATCH net-next v2 1/3] net: stmmac: qcom-ethqos: use u32 for rgmii read/write/update

[Russell King (Oracle)]

On Thu, Nov 20, 2025 at 11:25:16AM +0000, Russell King (Oracle) wrote:
> readl() returns a u32, and writel() takes a "u32" for the value. These
> are used in rgmii_readl()() and rgmii_writel(), but the value and
> return are "int". As these are 32-bit register values which are not
> signed, use "u32".
> 
> These changes do not cause generated code changes.
> 
> Update rgmii_updatel() to use u32 for mask and val. Changing "mask"
> to "u32" also does not cause generated code changes. However, changing
> "val" causes the generated assembly to be re-ordered for aarch64.
> 
> Update the temporary variables used with the rgmii functions to use
> u32.
> 
> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Konrad provided his reviewed-by in
https://lore.kernel.org/r/76d153cf-8048-4c6f-8765-51741de78298@oss.qualcomm.com
but for some reason I forgot to add it, so:

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

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Re: [PATCH net-next v2 2/3] net: stmmac: qcom-ethqos: add rgmii set/clear functions

[Konrad Dybcio]

On 11/20/25 12:25 PM, Russell King (Oracle) wrote:
> The driver has a lot of bit manipulation of the RGMII registers. Add
> a pair of helpers to set bits and clear bits, converting the various
> calls to rgmii_updatel() as appropriate.
> 
> Most of the change was done via this sed script:
> 
> /rgmii_updatel/ {
> 	N
> 	/,$/N
> 	/mask, / ! {
> 		s|rgmii_updatel\(([^,]*,\s+([^,]*),\s+)\2,\s+|rgmii_setmask(\1|
> 		s|rgmii_updatel\(([^,]*,\s+([^,]*),\s+)0,\s+|rgmii_clrmask(\1|
> 		s|^\s+$||
> 	}
> }
> 
> and then formatting tweaked where necessary.
> 
> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH net-next v2 0/3] net: stmmac: qcon-ethqos: "rgmii" accessor cleanups

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Thu, 20 Nov 2025 11:24:59 +0000 you wrote:
> This series cleans up the "rgmii" accessors in qcom-ethqos.
> 
> readl() and writel() return and take a u32 for the value. Rather than
> implicitly casting this to an int, keep it as a u32.
> 
> Add set/clear functions to reduce the code and make it easier to read.
> 
> [...]

Here is the summary with links:
  - [net-next,v2,1/3] net: stmmac: qcom-ethqos: use u32 for rgmii read/write/update
    https://git.kernel.org/netdev/net-next/c/f54bbd390f5f
  - [net-next,v2,2/3] net: stmmac: qcom-ethqos: add rgmii set/clear functions
    https://git.kernel.org/netdev/net-next/c/819212185ae5
  - [net-next,v2,3/3] net: stmmac: qcom-ethqos: use read_poll_timeout_atomic()
    https://git.kernel.org/netdev/net-next/c/9b60ba512c7f

You are awesome, thank you!
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