From: Taniya Das <quic_tdas@xxxxxxxxxxx>
Regera PLL ops are required to control the Regera PLL from clock
controller drivers, thus add support for the same.
Signed-off-by: Taniya Das <quic_tdas@xxxxxxxxxxx>
Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@xxxxxxxxxxx>
---
drivers/clk/qcom/clk-alpha-pll.c | 152 ++++++++++++++++++++++++++++++++++++++-
drivers/clk/qcom/clk-alpha-pll.h | 5 ++
2 files changed, 156 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index 8dc3b8774b8e..f0bf282212c9 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, 2018, The Linux Foundation. All rights reserved.
- * Copyright (c) 2021, 2023, Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021, 2023-2024, Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/kernel.h>
@@ -2587,3 +2587,153 @@ const struct clk_ops clk_alpha_pll_stromer_plus_ops = {
.set_rate = clk_alpha_pll_stromer_plus_set_rate,
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_stromer_plus_ops);
+
+void clk_regera_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+ const struct alpha_pll_config *config)
+{
+ clk_alpha_pll_write_config(regmap, PLL_L_VAL(pll), config->l);
+ clk_alpha_pll_write_config(regmap, PLL_ALPHA_VAL(pll), config->alpha);
+ clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val);
+ clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U(pll), config->config_ctl_hi_val);
+ clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U1(pll), config->config_ctl_hi1_val);
+ clk_alpha_pll_write_config(regmap, PLL_USER_CTL(pll), config->user_ctl_val);
+ clk_alpha_pll_write_config(regmap, PLL_USER_CTL_U(pll), config->user_ctl_hi_val);
+ clk_alpha_pll_write_config(regmap, PLL_USER_CTL_U1(pll), config->user_ctl_hi1_val);
+ clk_alpha_pll_write_config(regmap, PLL_TEST_CTL(pll), config->test_ctl_val);
+ clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U(pll), config->test_ctl_hi_val);
+ clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U1(pll), config->test_ctl_hi1_val);
+
+ /* Set operation mode to STANDBY */
+ regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
+}
+EXPORT_SYMBOL_GPL(clk_regera_pll_configure);
+
+static int clk_regera_pll_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;
+
+ regmap_read(regmap, PLL_MODE(pll), &val);
+
+ /* If in FSM mode, just vote for it */
+ if (val & PLL_VOTE_FSM_ENA) {
+ ret = clk_enable_regmap(hw);
+ if (ret)
+ return ret;
+ return wait_for_pll_enable_active(pll);
+ }
+
+ /* Get the PLL out of bypass mode */
+ regmap_update_bits(regmap, PLL_MODE(pll), PLL_BYPASSNL, PLL_BYPASSNL);
+
+ /*
+ * H/W requires a 1us delay between disabling the bypass and
+ * de-asserting the reset.
+ */
+ udelay(1);
+
+ regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N);
+
+ /* 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 */
+ regmap_update_bits(regmap, PLL_USER_CTL(pll), ZONDA_PLL_OUT_MASK, ZONDA_PLL_OUT_MASK);
+
+ /* Enable the global PLL outputs */
+ regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL);
+
+ return 0;
+}
+
+static void clk_regera_pll_disable(struct clk_hw *hw)
+{
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ struct regmap *regmap = pll->clkr.regmap;
+ u32 val;
+
+ regmap_read(regmap, PLL_MODE(pll), &val);
+
+ /* If in FSM mode, just unvote it */
+ if (val & PLL_VOTE_FSM_ENA) {
+ clk_disable_regmap(hw);
+ return;
+ }
+
+ /* Disable the global PLL output */
+ regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0);
+
+ /* Disable the PLL outputs */
+ regmap_update_bits(regmap, PLL_USER_CTL(pll), ZONDA_PLL_OUT_MASK, 0);
+
+ /* Put the PLL in bypass and reset */
+ regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N | PLL_BYPASSNL, 0);
+
+ /* Place the PLL mode in STANDBY state */
+ regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
+}
+
+static void zonda_pll_adjust_l_val(unsigned long rate, unsigned long prate,
+ u32 *l)
+{
+ u64 remainder, quotient;
+
+ quotient = rate;
+ remainder = do_div(quotient, prate);
+ *l = quotient;
+
+ if ((remainder * 2) / prate)
+ *l = *l + 1;
+}
+
+static int clk_regera_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long prate)
+{
+ struct clk_alpha_pll *pll = to_clk_alpha_pll(hw);
+ unsigned long rrate;
+ u32 l, alpha_width = pll_alpha_width(pll);
+ u64 a;
+ int ret;
+
+ rrate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width);
+
+ ret = alpha_pll_check_rate_margin(hw, rrate, rate);
+ if (ret < 0)
+ return ret;
+
+ if (a && (a & BIT(15)))
+ zonda_pll_adjust_l_val(rate, prate, &l);
+
+ regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a);
+ regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l);
+
+ /* Wait before polling for the frequency latch */
+ udelay(5);
+
+ if (clk_hw_is_enabled(hw)) {
+ ret = wait_for_pll_enable_lock(pll);
+ if (ret)
+ return ret;
+ }
+
+ /* Wait for PLL output to stabilize */
+ udelay(100);
+
+ return 0;
+}
+
+const struct clk_ops clk_alpha_pll_regera_ops = {
+ .enable = clk_regera_pll_enable,
+ .disable = clk_regera_pll_disable,
+ .is_enabled = clk_alpha_pll_is_enabled,
+ .recalc_rate = clk_trion_pll_recalc_rate,
+ .round_rate = clk_alpha_pll_round_rate,
+ .set_rate = clk_regera_pll_set_rate,
+};
+EXPORT_SYMBOL_GPL(clk_alpha_pll_regera_ops);
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index fb6d50263bb9..5bb0a07da53d 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -21,6 +21,7 @@ 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_REGERA = CLK_ALPHA_PLL_TYPE_ZONDA,
CLK_ALPHA_PLL_TYPE_ZONDA_OLE,
CLK_ALPHA_PLL_TYPE_LUCID_EVO,
CLK_ALPHA_PLL_TYPE_LUCID_OLE,
@@ -189,6 +190,8 @@ extern const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops;
extern const struct clk_ops clk_alpha_pll_rivian_evo_ops;
#define clk_alpha_pll_postdiv_rivian_evo_ops clk_alpha_pll_postdiv_fabia_ops
+extern const struct clk_ops clk_alpha_pll_regera_ops;
+
void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
const struct alpha_pll_config *config);
void clk_fabia_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
@@ -210,5 +213,7 @@ void clk_rivian_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regm
const struct alpha_pll_config *config);
void clk_stromer_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
const struct alpha_pll_config *config);
+void clk_regera_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+ const struct alpha_pll_config *config);
#endif
--
2.25.1
