| Message ID | 20210513175258.5842-2-jonathan@marek.ca (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | clk: qcom: Add camera clock controller driver for SM8250 | expand |
Hey Jonathan, On Thu, 13 May 2021 at 19:53, Jonathan Marek <jonathan@marek.ca> wrote: > > Ported over from the downstream driver. Will be used by SM8250 CAMCC. > > Signed-off-by: Jonathan Marek <jonathan@marek.ca> > --- > drivers/clk/qcom/clk-alpha-pll.c | 245 +++++++++++++++++++++++++++++++ > drivers/clk/qcom/clk-alpha-pll.h | 6 + > 2 files changed, 251 insertions(+) > > diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c > index c6eb99169ddc..7b332a8935f4 100644 > --- a/drivers/clk/qcom/clk-alpha-pll.c > +++ b/drivers/clk/qcom/clk-alpha-pll.c > @@ -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") > > @@ -1398,6 +1419,13 @@ const struct clk_ops clk_alpha_pll_postdiv_fabia_ops = { > }; > EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_fabia_ops); > > +const struct clk_ops clk_alpha_pll_postdiv_zonda_ops = { > + .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, > + .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, > + .set_rate = clk_alpha_pll_postdiv_fabia_set_rate, > +}; > +EXPORT_SYMBOL(clk_alpha_pll_postdiv_zonda_ops); > + > /** > * clk_lucid_pll_configure - configure the lucid pll > * > @@ -1777,3 +1805,220 @@ 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) > +{ > + if (config->l) > + regmap_write(regmap, PLL_L_VAL(pll), config->l); > + > + if (config->alpha) > + regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha); > + > + if (config->config_ctl_val) > + regmap_write(regmap, PLL_CONFIG_CTL(pll), > + config->config_ctl_val); > + > + if (config->config_ctl_hi_val) > + regmap_write(regmap, PLL_CONFIG_CTL_U(pll), > + config->config_ctl_hi_val); > + > + if (config->config_ctl_hi1_val) > + regmap_write(regmap, PLL_CONFIG_CTL_U1(pll), > + config->config_ctl_hi1_val); > + > + if (config->user_ctl_val) > + regmap_write(regmap, PLL_USER_CTL(pll), > + config->user_ctl_val); > + > + if (config->user_ctl_hi_val) > + regmap_write(regmap, PLL_USER_CTL_U(pll), > + config->user_ctl_hi_val); > + > + if (config->user_ctl_hi1_val) > + regmap_write(regmap, PLL_USER_CTL_U1(pll), > + config->user_ctl_hi1_val); > + > + if (config->test_ctl_val) > + regmap_write(regmap, PLL_TEST_CTL(pll), > + config->test_ctl_val); > + > + if (config->test_ctl_hi_val) > + regmap_write(regmap, PLL_TEST_CTL_U(pll), > + config->test_ctl_hi_val); > + > + if (config->test_ctl_hi1_val) > + regmap_write(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); > + > + /* PLL should be in OFF mode before continuing */ > + wmb(); > + > + /* Place the PLL in STANDBY mode */ > + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); > +} > + > +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; > + > + ret = regmap_read(regmap, PLL_MODE(pll), &val); > + if (ret) > + return ret; > + > + /* 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. > + */ > + mb(); > + 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 = regmap_read(regmap, PLL_TEST_CTL(pll), &val); > + if (ret) > + return ret; > + > + /* 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 */ > + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), > + ZONDA_PLL_OUT_MASK, ZONDA_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 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; > + int ret; > + > + ret = regmap_read(regmap, PLL_MODE(pll), &val); > + if (ret) > + return; > + > + /* If in FSM mode, just unvote it */ > + if (val & PLL_VOTE_FSM_ENA) { > + clk_disable_regmap(hw); > + return; > + } > + > + /* Disable the global PLL output */ > + ret = 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; > + u64 a; > + int ret; > + > + rrate = alpha_pll_round_rate(rate, prate, &l, &a, ALPHA_BITWIDTH); > + > + 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 */ > + ret = regmap_read(pll->clkr.regmap, PLL_TEST_CTL(pll), &test_ctl_val); > + if (ret) > + return ret; > + > + /* 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; > +} > + > +static unsigned long > +clk_zonda_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) > +{ > + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); > + u32 l, frac; > + > + regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l); > + regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &frac); > + > + return alpha_pll_calc_rate(parent_rate, l, frac, ALPHA_BITWIDTH); > +} > + > +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_zonda_pll_recalc_rate, > + .round_rate = clk_alpha_pll_round_rate, > + .set_rate = clk_zonda_pll_set_rate, > +}; > +EXPORT_SYMBOL(clk_alpha_pll_zonda_ops); > diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h > index 6943e933be0f..4871af27cf76 100644 > --- a/drivers/clk/qcom/clk-alpha-pll.h > +++ b/drivers/clk/qcom/clk-alpha-pll.h > @@ -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; > +extern const struct clk_ops clk_alpha_pll_postdiv_zonda_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 I'm seeing some checkpatch --strict warnings, with those fixed this patch looks good to me. Reviewed-by: Robert Foss <robert.foss@linaro.org>
On 13-05-21, 13:52, Jonathan Marek wrote: > Ported over from the downstream driver. Will be used by SM8250 CAMCC. > > Signed-off-by: Jonathan Marek <jonathan@marek.ca> > --- > drivers/clk/qcom/clk-alpha-pll.c | 245 +++++++++++++++++++++++++++++++ > drivers/clk/qcom/clk-alpha-pll.h | 6 + > 2 files changed, 251 insertions(+) > > diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c > index c6eb99169ddc..7b332a8935f4 100644 > --- a/drivers/clk/qcom/clk-alpha-pll.c > +++ b/drivers/clk/qcom/clk-alpha-pll.c > @@ -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) This seems similar to ALPHA_PLL_ACK_LATCH..? > + > #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") > > @@ -1398,6 +1419,13 @@ const struct clk_ops clk_alpha_pll_postdiv_fabia_ops = { > }; > EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_fabia_ops); > > +const struct clk_ops clk_alpha_pll_postdiv_zonda_ops = { > + .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, > + .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, > + .set_rate = clk_alpha_pll_postdiv_fabia_set_rate, > +}; > +EXPORT_SYMBOL(clk_alpha_pll_postdiv_zonda_ops); Why add one more ops when we can reuse clk_alpha_pll_postdiv_fabia_ops for this? > + > /** > * clk_lucid_pll_configure - configure the lucid pll > * > @@ -1777,3 +1805,220 @@ 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) > +{ > + if (config->l) > + regmap_write(regmap, PLL_L_VAL(pll), config->l); > + > + if (config->alpha) > + regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha); > + > + if (config->config_ctl_val) > + regmap_write(regmap, PLL_CONFIG_CTL(pll), > + config->config_ctl_val); this and below can fit in a single line and look neater > + > + if (config->config_ctl_hi_val) > + regmap_write(regmap, PLL_CONFIG_CTL_U(pll), > + config->config_ctl_hi_val); > + > + if (config->config_ctl_hi1_val) > + regmap_write(regmap, PLL_CONFIG_CTL_U1(pll), > + config->config_ctl_hi1_val); > + > + if (config->user_ctl_val) > + regmap_write(regmap, PLL_USER_CTL(pll), > + config->user_ctl_val); > + > + if (config->user_ctl_hi_val) > + regmap_write(regmap, PLL_USER_CTL_U(pll), > + config->user_ctl_hi_val); > + > + if (config->user_ctl_hi1_val) > + regmap_write(regmap, PLL_USER_CTL_U1(pll), > + config->user_ctl_hi1_val); > + > + if (config->test_ctl_val) > + regmap_write(regmap, PLL_TEST_CTL(pll), > + config->test_ctl_val); > + > + if (config->test_ctl_hi_val) > + regmap_write(regmap, PLL_TEST_CTL_U(pll), > + config->test_ctl_hi_val); > + > + if (config->test_ctl_hi1_val) > + regmap_write(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); > + > + /* PLL should be in OFF mode before continuing */ > + wmb(); Why a barrier? > + > + /* Place the PLL in STANDBY mode */ > + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); > +} > + > +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; > + > + ret = regmap_read(regmap, PLL_MODE(pll), &val); > + if (ret) > + return ret; > + > + /* 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. > + */ > + mb(); > + 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 = regmap_read(regmap, PLL_TEST_CTL(pll), &val); > + if (ret) > + return ret; > + > + /* 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 */ > + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), > + ZONDA_PLL_OUT_MASK, ZONDA_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 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; > + int ret; > + > + ret = regmap_read(regmap, PLL_MODE(pll), &val); > + if (ret) > + return; > + > + /* If in FSM mode, just unvote it */ > + if (val & PLL_VOTE_FSM_ENA) { > + clk_disable_regmap(hw); > + return; > + } > + > + /* Disable the global PLL output */ > + ret = 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; > + u64 a; > + int ret; > + > + rrate = alpha_pll_round_rate(rate, prate, &l, &a, ALPHA_BITWIDTH); > + > + 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 */ > + ret = regmap_read(pll->clkr.regmap, PLL_TEST_CTL(pll), &test_ctl_val); > + if (ret) > + return ret; > + > + /* 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; > +} > + > +static unsigned long > +clk_zonda_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) > +{ > + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); > + u32 l, frac; > + > + regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l); > + regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &frac); > + > + return alpha_pll_calc_rate(parent_rate, l, frac, ALPHA_BITWIDTH); > +} sounds like you could use clk_trion_pll_recalc_rate() instead
On 5/18/21 7:32 AM, Vinod Koul wrote: > On 13-05-21, 13:52, Jonathan Marek wrote: ... >> +/* ZONDA PLL specific */ >> +#define ZONDA_PLL_OUT_MASK 0xf >> +#define ZONDA_STAY_IN_CFA BIT(16) >> +#define ZONDA_PLL_FREQ_LOCK_DET BIT(29) > > This seems similar to ALPHA_PLL_ACK_LATCH..? > The bit is the same, and it is also used with wait_for_pll(), but the meaning seems different (the usage pattern is different). >> +const struct clk_ops clk_alpha_pll_postdiv_zonda_ops = { >> + .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, >> + .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, >> + .set_rate = clk_alpha_pll_postdiv_fabia_set_rate, >> +}; >> +EXPORT_SYMBOL(clk_alpha_pll_postdiv_zonda_ops); > > Why add one more ops when we can reuse clk_alpha_pll_postdiv_fabia_ops > for this? > No reason (copied from downstream), will fix. >> + >> + /* Set operation mode to OFF */ >> + regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY); >> + >> + /* PLL should be in OFF mode before continuing */ >> + wmb(); > > Why a barrier? > Again no reason (copied from downstream, but it doesn't make sense to have this barrier). >> +static unsigned long >> +clk_zonda_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) >> +{ >> + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); >> + u32 l, frac; >> + >> + regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l); >> + regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &frac); >> + >> + return alpha_pll_calc_rate(parent_rate, l, frac, ALPHA_BITWIDTH); >> +} > > sounds like you could use clk_trion_pll_recalc_rate() instead > I had this thought as well, but alpha_width in clk_trion_pll_recalc()_rate is 16, here ALPHA_BITWIDTH is 32, so I just copied this from downstream. I think changing pll_alpha_width() to return the right value for zonda will work and allow sharing the function, if you think that's a good idea?
On 18-05-21, 09:06, Jonathan Marek wrote: > On 5/18/21 7:32 AM, Vinod Koul wrote: > > > +static unsigned long > > > +clk_zonda_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) > > > +{ > > > + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); > > > + u32 l, frac; > > > + > > > + regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l); > > > + regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &frac); > > > + > > > + return alpha_pll_calc_rate(parent_rate, l, frac, ALPHA_BITWIDTH); > > > +} > > > > sounds like you could use clk_trion_pll_recalc_rate() instead > > > > I had this thought as well, but alpha_width in clk_trion_pll_recalc()_rate > is 16, here ALPHA_BITWIDTH is 32, so I just copied this from downstream. > > I think changing pll_alpha_width() to return the right value for zonda will > work and allow sharing the function, if you think that's a good idea? Yes I thinking pll_alpha_width() should do the trick here Thanks
On 5/13/2021 11:22 PM, Jonathan Marek wrote: > Ported over from the downstream driver. Will be used by SM8250 CAMCC. > > Signed-off-by: Jonathan Marek <jonathan@marek.ca> > --- > drivers/clk/qcom/clk-alpha-pll.c | 245 +++++++++++++++++++++++++++++++ > drivers/clk/qcom/clk-alpha-pll.h | 6 + > 2 files changed, 251 insertions(+) > > diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c > index c6eb99169ddc..7b332a8935f4 100644 > --- a/drivers/clk/qcom/clk-alpha-pll.c > +++ b/drivers/clk/qcom/clk-alpha-pll.c > @@ -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") > > @@ -1398,6 +1419,13 @@ const struct clk_ops clk_alpha_pll_postdiv_fabia_ops = { > }; > EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_fabia_ops); > > +const struct clk_ops clk_alpha_pll_postdiv_zonda_ops = { > + .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, > + .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, > + .set_rate = clk_alpha_pll_postdiv_fabia_set_rate, > +}; > +EXPORT_SYMBOL(clk_alpha_pll_postdiv_zonda_ops); > + > /** > * clk_lucid_pll_configure - configure the lucid pll > * > @@ -1777,3 +1805,220 @@ 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) > +{ > + if (config->l) > + regmap_write(regmap, PLL_L_VAL(pll), config->l); > + Please use clk_alpha_pll_write_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); > + if (config->alpha) > + regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha); > + > + if (config->config_ctl_val) > + regmap_write(regmap, PLL_CONFIG_CTL(pll), > + config->config_ctl_val); > + > + if (config->config_ctl_hi_val) > + regmap_write(regmap, PLL_CONFIG_CTL_U(pll), > + config->config_ctl_hi_val); > + > + if (config->config_ctl_hi1_val) > + regmap_write(regmap, PLL_CONFIG_CTL_U1(pll), > + config->config_ctl_hi1_val); > + > + if (config->user_ctl_val) > + regmap_write(regmap, PLL_USER_CTL(pll), > + config->user_ctl_val); > + > + if (config->user_ctl_hi_val) > + regmap_write(regmap, PLL_USER_CTL_U(pll), > + config->user_ctl_hi_val); > + > + if (config->user_ctl_hi1_val) > + regmap_write(regmap, PLL_USER_CTL_U1(pll), > + config->user_ctl_hi1_val); > + > + if (config->test_ctl_val) > + regmap_write(regmap, PLL_TEST_CTL(pll), > + config->test_ctl_val); > + > + if (config->test_ctl_hi_val) > + regmap_write(regmap, PLL_TEST_CTL_U(pll), > + config->test_ctl_hi_val); > + > + if (config->test_ctl_hi1_val) > + regmap_write(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); > + > + /* PLL should be in OFF mode before continuing */ > + wmb(); > + > + /* Place the PLL in STANDBY mode */ > + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); > +} > + > +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; > + > + ret = regmap_read(regmap, PLL_MODE(pll), &val); > + if (ret) > + return ret; > + > + /* 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. > + */ > + mb(); > + 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 = regmap_read(regmap, PLL_TEST_CTL(pll), &val); > + if (ret) > + return ret; > + > + /* 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 */ > + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), > + ZONDA_PLL_OUT_MASK, ZONDA_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 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; > + int ret; > + > + ret = regmap_read(regmap, PLL_MODE(pll), &val); > + if (ret) > + return; > + > + /* If in FSM mode, just unvote it */ > + if (val & PLL_VOTE_FSM_ENA) { > + clk_disable_regmap(hw); > + return; > + } > + > + /* Disable the global PLL output */ > + ret = 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_BITWIDTH); > + 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 */ > + ret = regmap_read(pll->clkr.regmap, PLL_TEST_CTL(pll), &test_ctl_val); > + if (ret) > + return ret; > + > + /* 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; > +} > + > +static unsigned long > +clk_zonda_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) > +{ > + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); > + u32 l, frac; > + > + regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l); > + regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &frac); > + > + return alpha_pll_calc_rate(parent_rate, l, frac, ALPHA_BITWIDTH); alpha_width = pll_alpha_width(pll); > +} > + > +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_zonda_pll_recalc_rate, > + .round_rate = clk_alpha_pll_round_rate, > + .set_rate = clk_zonda_pll_set_rate, > +}; > +EXPORT_SYMBOL(clk_alpha_pll_zonda_ops); > diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h > index 6943e933be0f..4871af27cf76 100644 > --- a/drivers/clk/qcom/clk-alpha-pll.h > +++ b/drivers/clk/qcom/clk-alpha-pll.h > @@ -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; > +extern const struct clk_ops clk_alpha_pll_postdiv_zonda_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 >
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index c6eb99169ddc..7b332a8935f4 100644 --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -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") @@ -1398,6 +1419,13 @@ const struct clk_ops clk_alpha_pll_postdiv_fabia_ops = { }; EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_fabia_ops); +const struct clk_ops clk_alpha_pll_postdiv_zonda_ops = { + .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, + .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, + .set_rate = clk_alpha_pll_postdiv_fabia_set_rate, +}; +EXPORT_SYMBOL(clk_alpha_pll_postdiv_zonda_ops); + /** * clk_lucid_pll_configure - configure the lucid pll * @@ -1777,3 +1805,220 @@ 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) +{ + if (config->l) + regmap_write(regmap, PLL_L_VAL(pll), config->l); + + if (config->alpha) + regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha); + + if (config->config_ctl_val) + regmap_write(regmap, PLL_CONFIG_CTL(pll), + config->config_ctl_val); + + if (config->config_ctl_hi_val) + regmap_write(regmap, PLL_CONFIG_CTL_U(pll), + config->config_ctl_hi_val); + + if (config->config_ctl_hi1_val) + regmap_write(regmap, PLL_CONFIG_CTL_U1(pll), + config->config_ctl_hi1_val); + + if (config->user_ctl_val) + regmap_write(regmap, PLL_USER_CTL(pll), + config->user_ctl_val); + + if (config->user_ctl_hi_val) + regmap_write(regmap, PLL_USER_CTL_U(pll), + config->user_ctl_hi_val); + + if (config->user_ctl_hi1_val) + regmap_write(regmap, PLL_USER_CTL_U1(pll), + config->user_ctl_hi1_val); + + if (config->test_ctl_val) + regmap_write(regmap, PLL_TEST_CTL(pll), + config->test_ctl_val); + + if (config->test_ctl_hi_val) + regmap_write(regmap, PLL_TEST_CTL_U(pll), + config->test_ctl_hi_val); + + if (config->test_ctl_hi1_val) + regmap_write(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); + + /* PLL should be in OFF mode before continuing */ + wmb(); + + /* Place the PLL in STANDBY mode */ + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); +} + +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; + + ret = regmap_read(regmap, PLL_MODE(pll), &val); + if (ret) + return ret; + + /* 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. + */ + mb(); + 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 = regmap_read(regmap, PLL_TEST_CTL(pll), &val); + if (ret) + return ret; + + /* 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 */ + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), + ZONDA_PLL_OUT_MASK, ZONDA_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 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; + int ret; + + ret = regmap_read(regmap, PLL_MODE(pll), &val); + if (ret) + return; + + /* If in FSM mode, just unvote it */ + if (val & PLL_VOTE_FSM_ENA) { + clk_disable_regmap(hw); + return; + } + + /* Disable the global PLL output */ + ret = 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; + u64 a; + int ret; + + rrate = alpha_pll_round_rate(rate, prate, &l, &a, ALPHA_BITWIDTH); + + 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 */ + ret = regmap_read(pll->clkr.regmap, PLL_TEST_CTL(pll), &test_ctl_val); + if (ret) + return ret; + + /* 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; +} + +static unsigned long +clk_zonda_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + u32 l, frac; + + regmap_read(pll->clkr.regmap, PLL_L_VAL(pll), &l); + regmap_read(pll->clkr.regmap, PLL_ALPHA_VAL(pll), &frac); + + return alpha_pll_calc_rate(parent_rate, l, frac, ALPHA_BITWIDTH); +} + +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_zonda_pll_recalc_rate, + .round_rate = clk_alpha_pll_round_rate, + .set_rate = clk_zonda_pll_set_rate, +}; +EXPORT_SYMBOL(clk_alpha_pll_zonda_ops); diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h index 6943e933be0f..4871af27cf76 100644 --- a/drivers/clk/qcom/clk-alpha-pll.h +++ b/drivers/clk/qcom/clk-alpha-pll.h @@ -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; +extern const struct clk_ops clk_alpha_pll_postdiv_zonda_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
Ported over from the downstream driver. Will be used by SM8250 CAMCC. Signed-off-by: Jonathan Marek <jonathan@marek.ca> --- drivers/clk/qcom/clk-alpha-pll.c | 245 +++++++++++++++++++++++++++++++ drivers/clk/qcom/clk-alpha-pll.h | 6 + 2 files changed, 251 insertions(+)