[PATCH 06/13] clk: qcom: clk-alpha-pll: Add support for CRM based PLL ops

Jagadeesh Kona
2026-04-20T16:30:23Z

Add clock ops for PLLs that are controlled by the CESTA Resource
Manager(CRM). For these PLLs, CRM programs the hardware based on
aggregated votes, so the clock driver does not need to program the
PLL registers directly, but can still model the PLLs and expose
them as parents to RCGs in the common clock framework.

Co-developed-by: Taniya Das <taniya.das@oss.qualcomm.com>
Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
Signed-off-by: Jagadeesh Kona <jagadeesh.kona@oss.qualcomm.com>
---
drivers/clk/qcom/clk-alpha-pll.c | 7 +++++++
drivers/clk/qcom/clk-alpha-pll.h | 3 +++
2 files changed, 10 insertions(+)

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index f8313f9d0e30ffd5393e3163ebc0e51b2bd96437..67fc97739d0d4c26aec0bac5d43d1b87d297bc6a 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -2,6 +2,7 @@
/*
* Copyright (c) 2015, 2018, The Linux Foundation. All rights reserved.
* Copyright (c) 2021, 2023-2024, Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
*/

#include <linux/kernel.h>
@@ -2585,6 +2586,12 @@ const struct clk_ops clk_alpha_pll_reset_lucid_evo_ops = {
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_reset_lucid_evo_ops);

+const struct clk_ops clk_alpha_pll_crm_ops = {
+ .recalc_rate = alpha_pll_lucid_evo_recalc_rate,
+ .determine_rate = clk_alpha_pll_determine_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_crm_ops);
+
static int alpha_pll_pongo_elu_prepare(struct clk_hw *hw)
{
struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index 42d3344921457c39deadcca5c43d72ded3b572a3..1ef515708ce19e636eb9a59b126df5048e262d85 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -2,6 +2,7 @@
/*
* Copyright (c) 2015, 2018, 2021 The Linux Foundation. All rights reserved.
* Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
*/

@@ -219,6 +220,8 @@ extern const struct clk_ops clk_alpha_pll_rivian_evo_ops;
extern const struct clk_ops clk_alpha_pll_regera_ops;
extern const struct clk_ops clk_alpha_pll_slew_ops;

+extern const struct clk_ops clk_alpha_pll_crm_ops;
+
void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
const struct alpha_pll_config *config);
void clk_huayra_2290_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,

--
2.34.1