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* [PATCH] phy: rockchip: remove 24M and 24M clock handling for naneng combphy
@ 2023-02-03  4:07 ` Qu Wenruo
  0 siblings, 0 replies; 2+ messages in thread
From: Qu Wenruo @ 2023-02-03  4:07 UTC (permalink / raw)
  To: linux-rockchip, linux-arm-kernel; +Cc: sebastian.reichel

Although the combphy supports 24M and 25M clocks, they are not utilized
at any upstream dts (RK3568) nor downstream vendor kernel (RK3568,
RK3588S, RK3588).

Another thing is, with those two clocks removed, it's easier to port the
rk3588 combphy, as 3588 combphy needs to write into cfg->pipe_clk_24m
for 24M clock case.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
REASON FOR RFC:

I'm not familiar with the arm realm at all, thus I don't know if it's a
common practice to support unutilized features.

But if it's OK for upstream kernel drivers to support functionality that
may never be utilized, please ignore this patch.
---
 .../phy/rockchip/phy-rockchip-naneng-combphy.c  | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
index 7b213825fb5d..ae7083ae17a2 100644
--- a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -94,7 +94,6 @@ struct rockchip_combphy_grfcfg {
 	struct combphy_reg pipe_rxterm_set;
 	struct combphy_reg pipe_txelec_set;
 	struct combphy_reg pipe_txcomp_set;
-	struct combphy_reg pipe_clk_25m;
 	struct combphy_reg pipe_clk_100m;
 	struct combphy_reg pipe_phymode_sel;
 	struct combphy_reg pipe_rate_sel;
@@ -454,21 +453,6 @@ static int rk3568_combphy_cfg(struct rockchip_combphy_priv *priv)
 	rate = clk_get_rate(priv->refclk);
 
 	switch (rate) {
-	case REF_CLOCK_24MHz:
-		if (priv->type == PHY_TYPE_USB3 || priv->type == PHY_TYPE_SATA) {
-			/* Set ssc_cnt[9:0]=0101111101 & 31.5KHz. */
-			val = PHYREG15_SSC_CNT_VALUE << PHYREG15_SSC_CNT_SHIFT;
-			rockchip_combphy_updatel(priv, PHYREG15_SSC_CNT_MASK,
-						 val, PHYREG15);
-
-			writel(PHYREG16_SSC_CNT_VALUE, priv->mmio + PHYREG16);
-		}
-		break;
-
-	case REF_CLOCK_25MHz:
-		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_25m, true);
-		break;
-
 	case REF_CLOCK_100MHz:
 		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_100m, true);
 		if (priv->type == PHY_TYPE_PCIE) {
@@ -530,7 +514,6 @@ static const struct rockchip_combphy_grfcfg rk3568_combphy_grfcfgs = {
 	.pipe_rxterm_set	= { 0x0000, 12, 12, 0x00, 0x01 },
 	.pipe_txelec_set	= { 0x0004, 1, 1, 0x00, 0x01 },
 	.pipe_txcomp_set	= { 0x0004, 4, 4, 0x00, 0x01 },
-	.pipe_clk_25m		= { 0x0004, 14, 13, 0x00, 0x01 },
 	.pipe_clk_100m		= { 0x0004, 14, 13, 0x00, 0x02 },
 	.pipe_phymode_sel	= { 0x0008, 1, 1, 0x00, 0x01 },
 	.pipe_rate_sel		= { 0x0008, 2, 2, 0x00, 0x01 },
-- 
2.39.1


_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip

^ permalink raw reply related	[flat|nested] 2+ messages in thread
* [PATCH] phy: rockchip: remove 24M and 24M clock handling for naneng combphy
@ 2023-02-03  4:07 ` Qu Wenruo
  0 siblings, 0 replies; 2+ messages in thread
From: Qu Wenruo @ 2023-02-03  4:07 UTC (permalink / raw)
  To: linux-rockchip, linux-arm-kernel; +Cc: sebastian.reichel

Although the combphy supports 24M and 25M clocks, they are not utilized
at any upstream dts (RK3568) nor downstream vendor kernel (RK3568,
RK3588S, RK3588).

Another thing is, with those two clocks removed, it's easier to port the
rk3588 combphy, as 3588 combphy needs to write into cfg->pipe_clk_24m
for 24M clock case.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
REASON FOR RFC:

I'm not familiar with the arm realm at all, thus I don't know if it's a
common practice to support unutilized features.

But if it's OK for upstream kernel drivers to support functionality that
may never be utilized, please ignore this patch.
---
 .../phy/rockchip/phy-rockchip-naneng-combphy.c  | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
index 7b213825fb5d..ae7083ae17a2 100644
--- a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -94,7 +94,6 @@ struct rockchip_combphy_grfcfg {
 	struct combphy_reg pipe_rxterm_set;
 	struct combphy_reg pipe_txelec_set;
 	struct combphy_reg pipe_txcomp_set;
-	struct combphy_reg pipe_clk_25m;
 	struct combphy_reg pipe_clk_100m;
 	struct combphy_reg pipe_phymode_sel;
 	struct combphy_reg pipe_rate_sel;
@@ -454,21 +453,6 @@ static int rk3568_combphy_cfg(struct rockchip_combphy_priv *priv)
 	rate = clk_get_rate(priv->refclk);
 
 	switch (rate) {
-	case REF_CLOCK_24MHz:
-		if (priv->type == PHY_TYPE_USB3 || priv->type == PHY_TYPE_SATA) {
-			/* Set ssc_cnt[9:0]=0101111101 & 31.5KHz. */
-			val = PHYREG15_SSC_CNT_VALUE << PHYREG15_SSC_CNT_SHIFT;
-			rockchip_combphy_updatel(priv, PHYREG15_SSC_CNT_MASK,
-						 val, PHYREG15);
-
-			writel(PHYREG16_SSC_CNT_VALUE, priv->mmio + PHYREG16);
-		}
-		break;
-
-	case REF_CLOCK_25MHz:
-		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_25m, true);
-		break;
-
 	case REF_CLOCK_100MHz:
 		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_100m, true);
 		if (priv->type == PHY_TYPE_PCIE) {
@@ -530,7 +514,6 @@ static const struct rockchip_combphy_grfcfg rk3568_combphy_grfcfgs = {
 	.pipe_rxterm_set	= { 0x0000, 12, 12, 0x00, 0x01 },
 	.pipe_txelec_set	= { 0x0004, 1, 1, 0x00, 0x01 },
 	.pipe_txcomp_set	= { 0x0004, 4, 4, 0x00, 0x01 },
-	.pipe_clk_25m		= { 0x0004, 14, 13, 0x00, 0x01 },
 	.pipe_clk_100m		= { 0x0004, 14, 13, 0x00, 0x02 },
 	.pipe_phymode_sel	= { 0x0008, 1, 1, 0x00, 0x01 },
 	.pipe_rate_sel		= { 0x0008, 2, 2, 0x00, 0x01 },
-- 
2.39.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2023-02-03  4:08 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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2023-02-03  4:07 [PATCH] phy: rockchip: remove 24M and 24M clock handling for naneng combphy Qu Wenruo
2023-02-03  4:07 ` Qu Wenruo

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