diff mbox series

[v2] clk: qcom: gcc-x1e80100: Fix halt_check for all pipe clocks

Message ID 20240628-x1e80100-clk-gcc-fix-halt-check-for-usb-phy-pipe-clks-v2-1-db3be54b1143@linaro.org (mailing list archive)
State New
Headers show
Series [v2] clk: qcom: gcc-x1e80100: Fix halt_check for all pipe clocks | expand

Commit Message

Abel Vesa June 28, 2024, 8:08 a.m. UTC 
In case of all pipe clocks, there is a QMP PHY clock that is feeding them.
If, for whatever reason, the clock from the PHY is not enabled, halt bit
will not get set, and the clock controller driver will assume the clock
is stuck in a specific state. The way this is supposed to be properly
fixed is to defer the checking of the halt bit until after the PHY clock
has been initialized, but doing so complicates the clock controller
driver. In fact, since these pipe clocks are consumed by the PHY, while
the PHY is also the one providing the source, if clock gets stuck, the PHY
driver would be to blame. So instead of checking the halt bit in here,
just skip it and assume the PHY driver is handling the source clock
correctly.

Fixes: 161b7c401f4b ("clk: qcom: Add Global Clock controller (GCC) driver for X1E80100")
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
Changes in v2:
- Re-worded the commit message from scratch.
- Changed all pipe clocks halt_check to skip.
- Link to v1: https://lore.kernel.org/r/20240530-x1e80100-clk-gcc-fix-halt-check-for-usb-phy-pipe-clks-v1-1-16c6f4dccbd5@linaro.org
---
 drivers/clk/qcom/gcc-x1e80100.c | 44 ++++++++++++++++++++---------------------
 1 file changed, 22 insertions(+), 22 deletions(-)


---
base-commit: 0fc4bfab2cd45f9acb86c4f04b5191e114e901ed
change-id: 20240530-x1e80100-clk-gcc-fix-halt-check-for-usb-phy-pipe-clks-ef8cf5b5631b

Best regards,

Comments

Taniya Das June 28, 2024, 8:53 a.m. UTC | #1 
On 6/28/2024 1:38 PM, Abel Vesa wrote:
> In case of all pipe clocks, there is a QMP PHY clock that is feeding them.
> If, for whatever reason, the clock from the PHY is not enabled, halt bit
> will not get set, and the clock controller driver will assume the clock
> is stuck in a specific state. The way this is supposed to be properly
> fixed is to defer the checking of the halt bit until after the PHY clock
> has been initialized, but doing so complicates the clock controller
> driver. In fact, since these pipe clocks are consumed by the PHY, while
> the PHY is also the one providing the source, if clock gets stuck, the PHY
> driver would be to blame. So instead of checking the halt bit in here,
> just skip it and assume the PHY driver is handling the source clock
> correctly.
> 
> Fixes: 161b7c401f4b ("clk: qcom: Add Global Clock controller (GCC) driver for X1E80100")
> Signed-off-by: Abel Vesa<abel.vesa@linaro.org>
> ---
> Changes in v2:
> - Re-worded the commit message from scratch.
> - Changed all pipe clocks halt_check to skip.
> - Link to v1:https://lore.kernel.org/r/20240530-x1e80100-clk-gcc-fix-halt-check-for-usb-phy-pipe-clks-v1-1-16c6f4dccbd5@linaro.org
> ---
>   drivers/clk/qcom/gcc-x1e80100.c | 44 ++++++++++++++++++++---------------------
>   1 file changed, 22 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/clk/qcom/gcc-x1e80100.c b/drivers/clk/qcom/gcc-x1e80100.c
> index eb7e36ebd7ae..fc80011342da 100644
> --- a/drivers/clk/qcom/gcc-x1e80100.c
> +++ b/drivers/clk/qcom/gcc-x1e80100.c

Reviewed-by: Taniya Das <quic_tdas@quicinc.com>
diff mbox series

Patch

diff --git a/drivers/clk/qcom/gcc-x1e80100.c b/drivers/clk/qcom/gcc-x1e80100.c
index eb7e36ebd7ae..fc80011342da 100644
--- a/drivers/clk/qcom/gcc-x1e80100.c
+++ b/drivers/clk/qcom/gcc-x1e80100.c
@@ -2812,7 +2812,7 @@  static struct clk_branch gcc_pcie_0_mstr_axi_clk = {
 
 static struct clk_branch gcc_pcie_0_pipe_clk = {
 	.halt_reg = 0xa0044,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52010,
 		.enable_mask = BIT(25),
@@ -2901,7 +2901,7 @@  static struct clk_branch gcc_pcie_1_mstr_axi_clk = {
 
 static struct clk_branch gcc_pcie_1_pipe_clk = {
 	.halt_reg = 0x2c044,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52020,
 		.enable_mask = BIT(30),
@@ -2990,7 +2990,7 @@  static struct clk_branch gcc_pcie_2_mstr_axi_clk = {
 
 static struct clk_branch gcc_pcie_2_pipe_clk = {
 	.halt_reg = 0x13044,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52020,
 		.enable_mask = BIT(23),
@@ -3110,7 +3110,7 @@  static struct clk_branch gcc_pcie_3_phy_rchng_clk = {
 
 static struct clk_branch gcc_pcie_3_pipe_clk = {
 	.halt_reg = 0x58050,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52020,
 		.enable_mask = BIT(3),
@@ -3235,7 +3235,7 @@  static struct clk_branch gcc_pcie_4_phy_rchng_clk = {
 
 static struct clk_branch gcc_pcie_4_pipe_clk = {
 	.halt_reg = 0x6b044,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52008,
 		.enable_mask = BIT(4),
@@ -3360,7 +3360,7 @@  static struct clk_branch gcc_pcie_5_phy_rchng_clk = {
 
 static struct clk_branch gcc_pcie_5_pipe_clk = {
 	.halt_reg = 0x2f044,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52018,
 		.enable_mask = BIT(17),
@@ -3498,7 +3498,7 @@  static struct clk_branch gcc_pcie_6a_phy_rchng_clk = {
 
 static struct clk_branch gcc_pcie_6a_pipe_clk = {
 	.halt_reg = 0x31050,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52018,
 		.enable_mask = BIT(26),
@@ -3636,7 +3636,7 @@  static struct clk_branch gcc_pcie_6b_phy_rchng_clk = {
 
 static struct clk_branch gcc_pcie_6b_pipe_clk = {
 	.halt_reg = 0x8d050,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52000,
 		.enable_mask = BIT(30),
@@ -5109,7 +5109,7 @@  static struct clk_branch gcc_usb3_mp_phy_com_aux_clk = {
 
 static struct clk_branch gcc_usb3_mp_phy_pipe_0_clk = {
 	.halt_reg = 0x17290,
-	.halt_check = BRANCH_HALT,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x17290,
 		.enable_mask = BIT(0),
@@ -5122,7 +5122,7 @@  static struct clk_branch gcc_usb3_mp_phy_pipe_0_clk = {
 
 static struct clk_branch gcc_usb3_mp_phy_pipe_1_clk = {
 	.halt_reg = 0x17298,
-	.halt_check = BRANCH_HALT,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x17298,
 		.enable_mask = BIT(0),
@@ -5186,7 +5186,7 @@  static struct clk_regmap_mux gcc_usb3_prim_phy_pipe_clk_src = {
 
 static struct clk_branch gcc_usb3_prim_phy_pipe_clk = {
 	.halt_reg = 0x39068,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.hwcg_reg = 0x39068,
 	.hwcg_bit = 1,
 	.clkr = {
@@ -5257,7 +5257,7 @@  static struct clk_regmap_mux gcc_usb3_sec_phy_pipe_clk_src = {
 
 static struct clk_branch gcc_usb3_sec_phy_pipe_clk = {
 	.halt_reg = 0xa1068,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.hwcg_reg = 0xa1068,
 	.hwcg_bit = 1,
 	.clkr = {
@@ -5327,7 +5327,7 @@  static struct clk_regmap_mux gcc_usb3_tert_phy_pipe_clk_src = {
 
 static struct clk_branch gcc_usb3_tert_phy_pipe_clk = {
 	.halt_reg = 0xa2068,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.hwcg_reg = 0xa2068,
 	.hwcg_bit = 1,
 	.clkr = {
@@ -5405,7 +5405,7 @@  static struct clk_branch gcc_usb4_0_master_clk = {
 
 static struct clk_branch gcc_usb4_0_phy_p2rr2p_pipe_clk = {
 	.halt_reg = 0x9f0d8,
-	.halt_check = BRANCH_HALT,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x9f0d8,
 		.enable_mask = BIT(0),
@@ -5418,7 +5418,7 @@  static struct clk_branch gcc_usb4_0_phy_p2rr2p_pipe_clk = {
 
 static struct clk_branch gcc_usb4_0_phy_pcie_pipe_clk = {
 	.halt_reg = 0x9f048,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52010,
 		.enable_mask = BIT(19),
@@ -5457,7 +5457,7 @@  static struct clk_branch gcc_usb4_0_phy_rx1_clk = {
 
 static struct clk_branch gcc_usb4_0_phy_usb_pipe_clk = {
 	.halt_reg = 0x9f0a4,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.hwcg_reg = 0x9f0a4,
 	.hwcg_bit = 1,
 	.clkr = {
@@ -5582,7 +5582,7 @@  static struct clk_branch gcc_usb4_1_master_clk = {
 
 static struct clk_branch gcc_usb4_1_phy_p2rr2p_pipe_clk = {
 	.halt_reg = 0x2b0d8,
-	.halt_check = BRANCH_HALT,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x2b0d8,
 		.enable_mask = BIT(0),
@@ -5595,7 +5595,7 @@  static struct clk_branch gcc_usb4_1_phy_p2rr2p_pipe_clk = {
 
 static struct clk_branch gcc_usb4_1_phy_pcie_pipe_clk = {
 	.halt_reg = 0x2b048,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52028,
 		.enable_mask = BIT(0),
@@ -5634,7 +5634,7 @@  static struct clk_branch gcc_usb4_1_phy_rx1_clk = {
 
 static struct clk_branch gcc_usb4_1_phy_usb_pipe_clk = {
 	.halt_reg = 0x2b0a4,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.hwcg_reg = 0x2b0a4,
 	.hwcg_bit = 1,
 	.clkr = {
@@ -5759,7 +5759,7 @@  static struct clk_branch gcc_usb4_2_master_clk = {
 
 static struct clk_branch gcc_usb4_2_phy_p2rr2p_pipe_clk = {
 	.halt_reg = 0x110d8,
-	.halt_check = BRANCH_HALT,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x110d8,
 		.enable_mask = BIT(0),
@@ -5772,7 +5772,7 @@  static struct clk_branch gcc_usb4_2_phy_p2rr2p_pipe_clk = {
 
 static struct clk_branch gcc_usb4_2_phy_pcie_pipe_clk = {
 	.halt_reg = 0x11048,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x52028,
 		.enable_mask = BIT(1),
@@ -5811,7 +5811,7 @@  static struct clk_branch gcc_usb4_2_phy_rx1_clk = {
 
 static struct clk_branch gcc_usb4_2_phy_usb_pipe_clk = {
 	.halt_reg = 0x110a4,
-	.halt_check = BRANCH_HALT_VOTED,
+	.halt_check = BRANCH_HALT_SKIP,
 	.hwcg_reg = 0x110a4,
 	.hwcg_bit = 1,
 	.clkr = {