linux-kernel - [PATCH] clk: qcom: ipq9574: Update the alpha PLL type for GPLLs

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Message-ID: <20240806061105.2849944-1-quic_amansing@quicinc.com>
Date: Tue, 6 Aug 2024 11:41:05 +0530
From: Amandeep Singh <quic_amansing@...cinc.com>
To: <andersson@...nel.org>, <mturquette@...libre.com>, <sboyd@...nel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC: <quic_devipriy@...cinc.com>
Subject: [PATCH] clk: qcom: ipq9574: Update the alpha PLL type for GPLLs

From: devi priya <quic_devipriy@...cinc.com>

Update PLL offsets to DEFAULT_EVO to configure MDIO to 800MHz.

The incorrect clock frequency leads to an incorrect MDIO clock. This,
in turn, affects the MDIO hardware configurations as the divider is
calculated from the MDIO clock frequency. If the clock frequency is
not as expected, the MDIO register fails due to the generation of an
incorrect MDIO frequency.

This issue is critical as it results in incorrect MDIO configurations
and ultimately leads to the MDIO function not working. This results in
a complete feature failure affecting all Ethernet PHYs. Specifically,
Ethernet will not work on IPQ9574 due to this issue.

Currently, the clock frequency is set to CLK_ALPHA_PLL_TYPE_DEFAULT.
However, this setting does not yield the expected clock frequency.
To rectify this, we need to change this to CLK_ALPHA_PLL_TYPE_DEFAULT_EVO.

This modification ensures that the clock frequency aligns with our
expectations, thereby resolving the MDIO register failure and ensuring
the proper functioning of the Ethernet on IPQ9574.

Fixes: d75b82cff488 ("clk: qcom: Add Global Clock Controller driver for IPQ9574")
Signed-off-by: devi priya <quic_devipriy@...cinc.com>
Signed-off-by: Amandeep Singh <quic_amansing@...cinc.com>
---
 drivers/clk/qcom/gcc-ipq9574.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/qcom/gcc-ipq9574.c b/drivers/clk/qcom/gcc-ipq9574.c
index 80fc94d705a0..645109f75b46 100644
--- a/drivers/clk/qcom/gcc-ipq9574.c
+++ b/drivers/clk/qcom/gcc-ipq9574.c
@@ -68,7 +68,7 @@ static const struct clk_parent_data gcc_sleep_clk_data[] = {
 
 static struct clk_alpha_pll gpll0_main = {
 	.offset = 0x20000,
-	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT_EVO],
 	.clkr = {
 		.enable_reg = 0x0b000,
 		.enable_mask = BIT(0),
@@ -96,7 +96,7 @@ static struct clk_fixed_factor gpll0_out_main_div2 = {
 
 static struct clk_alpha_pll_postdiv gpll0 = {
 	.offset = 0x20000,
-	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT_EVO],
 	.width = 4,
 	.clkr.hw.init = &(const struct clk_init_data) {
 		.name = "gpll0",
@@ -110,7 +110,7 @@ static struct clk_alpha_pll_postdiv gpll0 = {
 
 static struct clk_alpha_pll gpll4_main = {
 	.offset = 0x22000,
-	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT_EVO],
 	.clkr = {
 		.enable_reg = 0x0b000,
 		.enable_mask = BIT(2),
@@ -125,7 +125,7 @@ static struct clk_alpha_pll gpll4_main = {
 
 static struct clk_alpha_pll_postdiv gpll4 = {
 	.offset = 0x22000,
-	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT_EVO],
 	.width = 4,
 	.clkr.hw.init = &(const struct clk_init_data) {
 		.name = "gpll4",
@@ -139,7 +139,7 @@ static struct clk_alpha_pll_postdiv gpll4 = {
 
 static struct clk_alpha_pll gpll2_main = {
 	.offset = 0x21000,
-	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT_EVO],
 	.clkr = {
 		.enable_reg = 0x0b000,
 		.enable_mask = BIT(1),
@@ -154,7 +154,7 @@ static struct clk_alpha_pll gpll2_main = {
 
 static struct clk_alpha_pll_postdiv gpll2 = {
 	.offset = 0x21000,
-	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
+	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT_EVO],
 	.width = 4,
 	.clkr.hw.init = &(const struct clk_init_data) {
 		.name = "gpll2",
-- 
2.34.1