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Message-ID: <d582c3e291ae82aa488785eff36157653741f841.1638861860.git.quic_vamslank@quicinc.com>
Date: Mon, 6 Dec 2021 23:32:50 -0800
From: <quic_vamslank@...cinc.com>
To: <agross@...nel.org>, <bjorn.andersson@...aro.org>,
<mturquette@...libre.com>, <sboyd@...nel.org>, <robh+dt@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<manivannan.sadhasivam@...aro.org>,
Vamsi Krishna Lanka <quic_vamslank@...cinc.com>,
Vinod Koul <vkoul@...nel.org>
Subject: [PATCH v7 2/3] clk: qcom: Add LUCID_EVO PLL type for SDX65
From: Vamsi Krishna Lanka <quic_vamslank@...cinc.com>
Add a LUCID_EVO PLL type for SDX65 SoC from Qualcomm.
Signed-off-by: Vamsi Krishna Lanka <quic_vamslank@...cinc.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Vinod Koul <vkoul@...nel.org>
---
drivers/clk/qcom/clk-alpha-pll.c | 204 +++++++++++++++++++++++++++----
drivers/clk/qcom/clk-alpha-pll.h | 3 +
2 files changed, 181 insertions(+), 26 deletions(-)
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index eaedcceb766f..494feff5adde 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021, Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/kernel.h>
@@ -139,6 +140,20 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
[PLL_OFF_OPMODE] = 0x28,
[PLL_OFF_STATUS] = 0x38,
},
+ [CLK_ALPHA_PLL_TYPE_LUCID_EVO] = {
+ [PLL_OFF_OPMODE] = 0x04,
+ [PLL_OFF_STATUS] = 0x0c,
+ [PLL_OFF_L_VAL] = 0x10,
+ [PLL_OFF_ALPHA_VAL] = 0x14,
+ [PLL_OFF_USER_CTL] = 0x18,
+ [PLL_OFF_USER_CTL_U] = 0x1c,
+ [PLL_OFF_CONFIG_CTL] = 0x20,
+ [PLL_OFF_CONFIG_CTL_U] = 0x24,
+ [PLL_OFF_CONFIG_CTL_U1] = 0x28,
+ [PLL_OFF_TEST_CTL] = 0x2c,
+ [PLL_OFF_TEST_CTL_U] = 0x30,
+ [PLL_OFF_TEST_CTL_U1] = 0x34,
+ },
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
@@ -175,6 +190,10 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
#define LUCID_5LPE_PLL_LATCH_INPUT BIT(14)
#define LUCID_5LPE_ENABLE_VOTE_RUN BIT(21)
+/* LUCID EVO PLL specific settings and offsets */
+#define LUCID_EVO_ENABLE_VOTE_RUN BIT(25)
+#define LUCID_EVO_PLL_L_VAL_MASK GENMASK(15, 0)
+
/* ZONDA PLL specific */
#define ZONDA_PLL_OUT_MASK 0xf
#define ZONDA_STAY_IN_CFA BIT(16)
@@ -1741,35 +1760,47 @@ static int alpha_pll_lucid_5lpe_set_rate(struct clk_hw *hw, unsigned long rate,
LUCID_5LPE_ALPHA_PLL_ACK_LATCH);
}
+static int __clk_lucid_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate, unsigned long enable_vote_run)
+{
+ struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
+ struct regmap *regmap = pll->clkr.regmap;
+ int i, val, div, ret;
+ u32 mask;
+
+ /*
+ * If the PLL is in FSM mode, then treat set_rate callback as a
+ * no-operation.
+ */
+ ret = regmap_read(regmap, PLL_USER_CTL(pll), &val);
+ if (ret)
+ return ret;
+
+ if (val & enable_vote_run)
+ return 0;
+
+ if (!pll->post_div_table) {
+ pr_err("Missing the post_div_table for the %s PLL\n", clk_hw_get_name(&pll->clkr.hw));
+ return -EINVAL;
+ }
+
+ div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
+ for (i = 0; i < pll->num_post_div; i++) {
+ if (pll->post_div_table[i].div == div) {
+ val = pll->post_div_table[i].val;
+ break;
+ }
+ }
+
+ mask = GENMASK(pll->width + pll->post_div_shift - 1, pll->post_div_shift);
+ return regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
+ mask, val << pll->post_div_shift);
+}
+
static int clk_lucid_5lpe_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
- struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw);
- int i, val = 0, div, ret;
- u32 mask;
-
- /*
- * If the PLL is in FSM mode, then treat set_rate callback as a
- * no-operation.
- */
- ret = regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &val);
- if (ret)
- return ret;
-
- if (val & LUCID_5LPE_ENABLE_VOTE_RUN)
- return 0;
-
- div = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
- for (i = 0; i < pll->num_post_div; i++) {
- if (pll->post_div_table[i].div == div) {
- val = pll->post_div_table[i].val;
- break;
- }
- }
-
- mask = GENMASK(pll->width + pll->post_div_shift - 1, pll->post_div_shift);
- return regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll),
- mask, val << pll->post_div_shift);
+ return __clk_lucid_pll_postdiv_set_rate(hw, rate, parent_rate, LUCID_5LPE_ENABLE_VOTE_RUN);
}
const struct clk_ops clk_alpha_pll_lucid_5lpe_ops = {
@@ -1951,3 +1982,124 @@ const struct clk_ops clk_alpha_pll_zonda_ops = {
.set_rate = clk_zonda_pll_set_rate,
};
EXPORT_SYMBOL(clk_alpha_pll_zonda_ops);
+
+static int alpha_pll_lucid_evo_enable(struct clk_hw *hw)
+{
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ struct regmap *regmap = pll->clkr.regmap;
+ u32 val;
+ int ret;
+
+ ret = regmap_read(regmap, PLL_USER_CTL(pll), &val);
+ if (ret)
+ return ret;
+
+ /* If in FSM mode, just vote for it */
+ if (val & LUCID_EVO_ENABLE_VOTE_RUN) {
+ ret = clk_enable_regmap(hw);
+ if (ret)
+ return ret;
+ return wait_for_pll_enable_lock(pll);
+ }
+
+ /* Check if PLL is already enabled */
+ ret = trion_pll_is_enabled(pll, regmap);
+ if (ret < 0)
+ return ret;
+ else if (ret) {
+ pr_warn("%s PLL is already enabled\n", clk_hw_get_name(&pll->clkr.hw));
+ return 0;
+ }
+
+ ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N);
+ if (ret)
+ return ret;
+
+ /* Set operation mode to RUN */
+ regmap_write(regmap, PLL_OPMODE(pll), PLL_RUN);
+
+ ret = wait_for_pll_enable_lock(pll);
+ if (ret)
+ return ret;
+
+ /* Enable the PLL outputs */
+ ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), PLL_OUT_MASK, PLL_OUT_MASK);
+ if (ret)
+ return ret;
+
+ /* Enable the global PLL outputs */
+ ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL);
+ if (ret)
+ return ret;
+
+ /* Ensure that the write above goes through before returning. */
+ mb();
+ return ret;
+}
+
+static void alpha_pll_lucid_evo_disable(struct clk_hw *hw)
+{
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ struct regmap *regmap = pll->clkr.regmap;
+ u32 val;
+ int ret;
+
+ ret = regmap_read(regmap, PLL_USER_CTL(pll), &val);
+ if (ret)
+ return;
+
+ /* If in FSM mode, just unvote it */
+ if (val & LUCID_EVO_ENABLE_VOTE_RUN) {
+ clk_disable_regmap(hw);
+ return;
+ }
+
+ /* Disable the global PLL output */
+ ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0);
+ if (ret)
+ return;
+
+ /* Disable the PLL outputs */
+ ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), PLL_OUT_MASK, 0);
+ if (ret)
+ return;
+
+ /* Place the PLL mode in STANDBY */
+ regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
+}
+
+static unsigned long alpha_pll_lucid_evo_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ struct regmap *regmap = pll->clkr.regmap;
+ u32 l, frac;
+
+ regmap_read(regmap, PLL_L_VAL(pll), &l);
+ l &= LUCID_EVO_PLL_L_VAL_MASK;
+ regmap_read(regmap, PLL_ALPHA_VAL(pll), &frac);
+
+ return alpha_pll_calc_rate(parent_rate, l, frac, pll_alpha_width(pll));
+}
+
+static int clk_lucid_evo_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ return __clk_lucid_pll_postdiv_set_rate(hw, rate, parent_rate, LUCID_EVO_ENABLE_VOTE_RUN);
+}
+
+const struct clk_ops clk_alpha_pll_fixed_lucid_evo_ops = {
+ .enable = alpha_pll_lucid_evo_enable,
+ .disable = alpha_pll_lucid_evo_disable,
+ .is_enabled = clk_trion_pll_is_enabled,
+ .recalc_rate = alpha_pll_lucid_evo_recalc_rate,
+ .round_rate = clk_alpha_pll_round_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_fixed_lucid_evo_ops);
+
+const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops = {
+ .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate,
+ .round_rate = clk_alpha_pll_postdiv_fabia_round_rate,
+ .set_rate = clk_lucid_evo_pll_postdiv_set_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_lucid_evo_ops);
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index 55e4fa47912f..6e9907deaf30 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -17,6 +17,7 @@ enum {
CLK_ALPHA_PLL_TYPE_LUCID = CLK_ALPHA_PLL_TYPE_TRION,
CLK_ALPHA_PLL_TYPE_AGERA,
CLK_ALPHA_PLL_TYPE_ZONDA,
+ CLK_ALPHA_PLL_TYPE_LUCID_EVO,
CLK_ALPHA_PLL_TYPE_MAX,
};
@@ -151,6 +152,8 @@ extern const struct clk_ops clk_alpha_pll_postdiv_lucid_5lpe_ops;
extern const struct clk_ops clk_alpha_pll_zonda_ops;
#define clk_alpha_pll_postdiv_zonda_ops clk_alpha_pll_postdiv_fabia_ops
+extern const struct clk_ops clk_alpha_pll_fixed_lucid_evo_ops;
+extern const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops;
void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
const struct alpha_pll_config *config);
--
2.33.1
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