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clk: qcom: clk-alpha-pll: add support for zonda pll

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Ported over from the downstream driver. Will be used by SM8250 CAMCC.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Link: https://lore.kernel.org/r/20210609022051.2171-2-jonathan@marek.ca
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Jonathan Marek 2021-06-08 22:20:46 -04:00 committed by Stephen Boyd
parent 652c96bb9b
commit f21b6bfecc
2 changed files with 180 additions and 0 deletions
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174
drivers/clk/qcom/clk-alpha-pll.c
View File

@ -126,6 +126,19 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
[PLL_OFF_TEST_CTL_U] = 0x1c,
[PLL_OFF_STATUS] = 0x2c,
},
[CLK_ALPHA_PLL_TYPE_ZONDA] = {
[PLL_OFF_L_VAL] = 0x04,
[PLL_OFF_ALPHA_VAL] = 0x08,
[PLL_OFF_USER_CTL] = 0x0c,
[PLL_OFF_CONFIG_CTL] = 0x10,
[PLL_OFF_CONFIG_CTL_U] = 0x14,
[PLL_OFF_CONFIG_CTL_U1] = 0x18,
[PLL_OFF_TEST_CTL] = 0x1c,
[PLL_OFF_TEST_CTL_U] = 0x20,
[PLL_OFF_TEST_CTL_U1] = 0x24,
[PLL_OFF_OPMODE] = 0x28,
[PLL_OFF_STATUS] = 0x38,
},
};
EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
@ -162,6 +175,11 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
#define LUCID_5LPE_PLL_LATCH_INPUT BIT(14)
#define LUCID_5LPE_ENABLE_VOTE_RUN BIT(21)
/* ZONDA PLL specific */
#define ZONDA_PLL_OUT_MASK 0xf
#define ZONDA_STAY_IN_CFA BIT(16)
#define ZONDA_PLL_FREQ_LOCK_DET BIT(29)
#define pll_alpha_width(p) \
((PLL_ALPHA_VAL_U(p) - PLL_ALPHA_VAL(p) == 4) ? \
ALPHA_REG_BITWIDTH : ALPHA_REG_16BIT_WIDTH)
@ -208,6 +226,9 @@ static int wait_for_pll(struct clk_alpha_pll *pll, u32 mask, bool inverse,
#define wait_for_pll_enable_lock(pll) \
wait_for_pll(pll, PLL_LOCK_DET, 0, "enable")
#define wait_for_zonda_pll_freq_lock(pll) \
wait_for_pll(pll, ZONDA_PLL_FREQ_LOCK_DET, 0, "freq enable")
#define wait_for_pll_disable(pll) \
wait_for_pll(pll, PLL_ACTIVE_FLAG, 1, "disable")
@ -1777,3 +1798,156 @@ const struct clk_ops clk_alpha_pll_postdiv_lucid_5lpe_ops = {
.set_rate = clk_lucid_5lpe_pll_postdiv_set_rate,
};
EXPORT_SYMBOL(clk_alpha_pll_postdiv_lucid_5lpe_ops);
void clk_zonda_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);
regmap_update_bits(regmap, PLL_MODE(pll), PLL_BYPASSNL, 0);
/* Disable PLL output */
regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0);
/* Set operation mode to OFF */
regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY);
/* Place the PLL in STANDBY mode */
regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N);
}
EXPORT_SYMBOL_GPL(clk_zonda_pll_configure);
static int clk_zonda_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);
regmap_read(regmap, PLL_TEST_CTL(pll), &val);
/* If cfa mode then poll for freq lock */
if (val & ZONDA_STAY_IN_CFA)
ret = wait_for_zonda_pll_freq_lock(pll);
else
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_zonda_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 OFF state */
regmap_write(regmap, PLL_OPMODE(pll), 0x0);
}
static int clk_zonda_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 test_ctl_val;
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;
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);
/* Read stay in cfa mode */
regmap_read(pll->clkr.regmap, PLL_TEST_CTL(pll), &test_ctl_val);
/* If cfa mode then poll for freq lock */
if (test_ctl_val & ZONDA_STAY_IN_CFA)
ret = wait_for_zonda_pll_freq_lock(pll);
else
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_zonda_ops = {
.enable = clk_zonda_pll_enable,
.disable = clk_zonda_pll_disable,
.is_enabled = clk_trion_pll_is_enabled,
.recalc_rate = clk_trion_pll_recalc_rate,
.round_rate = clk_alpha_pll_round_rate,
.set_rate = clk_zonda_pll_set_rate,
};
EXPORT_SYMBOL(clk_alpha_pll_zonda_ops);

6
drivers/clk/qcom/clk-alpha-pll.h
View File

@ -16,6 +16,7 @@ enum {
CLK_ALPHA_PLL_TYPE_TRION,
CLK_ALPHA_PLL_TYPE_LUCID = CLK_ALPHA_PLL_TYPE_TRION,
CLK_ALPHA_PLL_TYPE_AGERA,
CLK_ALPHA_PLL_TYPE_ZONDA,
CLK_ALPHA_PLL_TYPE_MAX,
};
@ -148,6 +149,9 @@ extern const struct clk_ops clk_alpha_pll_lucid_5lpe_ops;
extern const struct clk_ops clk_alpha_pll_fixed_lucid_5lpe_ops;
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
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,
@ -159,6 +163,8 @@ void clk_agera_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
#define clk_lucid_pll_configure(pll, regmap, config) \
clk_trion_pll_configure(pll, regmap, config)
void clk_zonda_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
const struct alpha_pll_config *config);
#endif