linux-kernel - [PATCH v2 2/8] clk: qcom: common: Add support to configure PLL

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Message-ID: <20250306-videocc-pll-multi-pd-voting-v2-2-0cd00612bc0e@quicinc.com>
Date: Thu, 6 Mar 2025 14:25:34 +0530
From: Jagadeesh Kona <quic_jkona@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette
	<mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
CC: Ajit Pandey <quic_ajipan@...cinc.com>,
        Imran Shaik
	<quic_imrashai@...cinc.com>,
        Taniya Das <quic_tdas@...cinc.com>,
        "Satya Priya
 Kakitapalli" <quic_skakitap@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Jagadeesh Kona <quic_jkona@...cinc.com>
Subject: [PATCH v2 2/8] clk: qcom: common: Add support to configure PLL

From: Taniya Das <quic_tdas@...cinc.com>

Integrate PLL configuration into clk_alpha_pll structure and add support
for qcom_cc_clk_alpha_pll_configure() function which can be used to
configure the clock controller PLLs from common core code.

Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
---
 drivers/clk/qcom/clk-alpha-pll.h |  2 ++
 drivers/clk/qcom/common.c        | 55 ++++++++++++++++++++++++++++++++++++++++
 drivers/clk/qcom/common.h        |  1 +
 3 files changed, 58 insertions(+)

diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index 79aca8525262211ae5295245427d4540abf1e09a..943320cdcd10a6c07fcd74dccb88be847dc086c2 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -81,6 +81,7 @@ struct pll_vco {
  * struct clk_alpha_pll - phase locked loop (PLL)
  * @offset: base address of registers
  * @regs: alpha pll register map (see @clk_alpha_pll_regs)
+ * @config: array of pll settings
  * @vco_table: array of VCO settings
  * @num_vco: number of VCO settings in @vco_table
  * @flags: bitmask to indicate features supported by the hardware
@@ -90,6 +91,7 @@ struct clk_alpha_pll {
 	u32 offset;
 	const u8 *regs;
 
+	const struct alpha_pll_config *config;
 	const struct pll_vco *vco_table;
 	size_t num_vco;
 #define SUPPORTS_OFFLINE_REQ		BIT(0)
diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index 9e3380fd718198c9fe63d7361615a91c3ecb3d60..74d062b5da0647f7f2bd8fd7a004ffdb1116c1ea 100644
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -13,6 +13,7 @@
 #include <linux/of.h>
 
 #include "common.h"
+#include "clk-alpha-pll.h"
 #include "clk-rcg.h"
 #include "clk-regmap.h"
 #include "reset.h"
@@ -284,6 +285,60 @@ static int qcom_cc_icc_register(struct device *dev,
 						     desc->num_icc_hws, icd);
 }
 
+static void qcom_cc_clk_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap)
+{
+	if (!pll->config || !pll->regs)
+		return;
+
+	switch (GET_PLL_TYPE(pll)) {
+	case CLK_ALPHA_PLL_TYPE_LUCID_OLE:
+		clk_lucid_ole_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_LUCID_EVO:
+		clk_lucid_evo_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_TAYCAN_ELU:
+		clk_taycan_elu_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_RIVIAN_EVO:
+		clk_rivian_evo_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_TRION:
+		clk_trion_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_HUAYRA_2290:
+		clk_huayra_2290_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_FABIA:
+		clk_fabia_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_AGERA:
+		clk_agera_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_PONGO_ELU:
+		clk_pongo_elu_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_ZONDA:
+	case CLK_ALPHA_PLL_TYPE_ZONDA_OLE:
+		clk_zonda_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_STROMER:
+	case CLK_ALPHA_PLL_TYPE_STROMER_PLUS:
+		clk_stromer_pll_configure(pll, regmap, pll->config);
+		break;
+	case CLK_ALPHA_PLL_TYPE_DEFAULT:
+	case CLK_ALPHA_PLL_TYPE_DEFAULT_EVO:
+	case CLK_ALPHA_PLL_TYPE_HUAYRA:
+	case CLK_ALPHA_PLL_TYPE_HUAYRA_APSS:
+	case CLK_ALPHA_PLL_TYPE_BRAMMO:
+	case CLK_ALPHA_PLL_TYPE_BRAMMO_EVO:
+		clk_alpha_pll_configure(pll, regmap, pll->config);
+		break;
+	default:
+		break;
+	}
+}
+
 int qcom_cc_really_probe(struct device *dev,
 			 const struct qcom_cc_desc *desc, struct regmap *regmap)
 {
diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h
index 7ace5d7f5836aa81431153ba92d8f14f2ffe8147..2066c8937936235d7bd03ab3225d4b3f4fb08dd0 100644
--- a/drivers/clk/qcom/common.h
+++ b/drivers/clk/qcom/common.h
@@ -18,6 +18,7 @@ struct clk_hw;
 #define PLL_BIAS_COUNT_MASK	0x3f
 #define PLL_VOTE_FSM_ENA	BIT(20)
 #define PLL_VOTE_FSM_RESET	BIT(21)
+#define GET_PLL_TYPE(pll)	((pll->regs - clk_alpha_pll_regs[0]) / PLL_OFF_MAX_REGS)
 
 struct qcom_icc_hws_data {
 	int master_id;

-- 
2.34.1