[v2,2/7] clk: qcom: clk-alpha-pll: Add HUAYRA_2290 support

Commit Message

Konrad Dybcio Feb. 23, 2024, 9:21 p.m. UTC

Commit 134b55b7e19f ("clk: qcom: support Huayra type Alpha PLL")
introduced an entry to the alpha offsets array, but diving into QCM2290
downstream and some documentation, it turned out that the name Huayra
apparently has been used quite liberally across many chips, even with
noticeably different hardware.

Introduce another set of offsets and a new configure function for the
Huayra PLL found on QCM2290. This is required e.g. for the consumers
of GPUCC_PLL0 to properly start.

Signed-off-by: Konrad Dybcio <[e-mail]>
---
 drivers/clk/qcom/clk-alpha-pll.c | 47 ++++++++++++++++++++++++++++++++++++++++
 drivers/clk/qcom/clk-alpha-pll.h |  3 +++
 2 files changed, 50 insertions(+)

Comments

Dmitry Baryshkov Feb. 23, 2024, 9:24 p.m. UTC | #1

On Fri, 23 Feb 2024 at 23:21, Konrad Dybcio <[e-mail]> wrote:
>
> Commit 134b55b7e19f ("clk: qcom: support Huayra type Alpha PLL")
> introduced an entry to the alpha offsets array, but diving into QCM2290
> downstream and some documentation, it turned out that the name Huayra
> apparently has been used quite liberally across many chips, even with
> noticeably different hardware.
>
> Introduce another set of offsets and a new configure function for the
> Huayra PLL found on QCM2290. This is required e.g. for the consumers
> of GPUCC_PLL0 to properly start.
>
> Signed-off-by: Konrad Dybcio <[e-mail]>
> ---
>  drivers/clk/qcom/clk-alpha-pll.c | 47 ++++++++++++++++++++++++++++++++++++++++
>  drivers/clk/qcom/clk-alpha-pll.h |  3 +++
>  2 files changed, 50 insertions(+)

Reviewed-by: Dmitry Baryshkov <[e-mail]>

Trilok Soni Feb. 23, 2024, 10:48 p.m. UTC | #2

On 2/23/2024 1:21 PM, Konrad Dybcio wrote:
> +	/* Wait 50us for PLL_LOCK_DET bit to go high */
> +	usleep_range(50, 55);
> +
> +	/* Enable PLL output */
> +	regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL);
> +}
> +EXPORT_SYMBOL(clk_huayra_2290_pll_configure);

Please use EXPORT_SYMBOL_GPL.

Konrad Dybcio March 12, 2024, 4:12 p.m. UTC | #3

On 2/23/24 23:48, Trilok Soni wrote:
> On 2/23/2024 1:21 PM, Konrad Dybcio wrote:
>> +	/* Wait 50us for PLL_LOCK_DET bit to go high */
>> +	usleep_range(50, 55);
>> +
>> +	/* Enable PLL output */
>> +	regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL);
>> +}
>> +EXPORT_SYMBOL(clk_huayra_2290_pll_configure);
> 
> Please use EXPORT_SYMBOL_GPL.

Sure, I glanced over this!

I've also noticed that it's a very common oversight.. would you be
interested in extending scripts/checkpatch.pl to suggest the _GPL
variant?

Konrad

Patch

diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c
index 8a412ef47e16..82b71f24ee7d 100644
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -83,6 +83,19 @@  const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = {
 		[PLL_OFF_TEST_CTL_U] = 0x20,
 		[PLL_OFF_STATUS] = 0x24,
 	},
+	[CLK_ALPHA_PLL_TYPE_HUAYRA_2290] =  {
+		[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,
+	},
 	[CLK_ALPHA_PLL_TYPE_BRAMMO] =  {
 		[PLL_OFF_L_VAL] = 0x04,
 		[PLL_OFF_ALPHA_VAL] = 0x08,
@@ -779,6 +792,40 @@  static long clk_alpha_pll_round_rate(struct clk_hw *hw, unsigned long rate,
 	return clamp(rate, min_freq, max_freq);
 }
 
+void clk_huayra_2290_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
+				   const struct alpha_pll_config *config)
+{
+	u32 val;
+
+	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_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);
+	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_USER_CTL(pll), config->user_ctl_val);
+
+	/* Set PLL_BYPASSNL */
+	regmap_update_bits(regmap, PLL_MODE(pll), PLL_BYPASSNL, PLL_BYPASSNL);
+	regmap_read(regmap, PLL_MODE(pll), &val);
+
+	/* Wait 5 us between setting BYPASS and deasserting reset */
+	udelay(5);
+
+	/* Take PLL out from reset state */
+	regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N);
+	regmap_read(regmap, PLL_MODE(pll), &val);
+
+	/* Wait 50us for PLL_LOCK_DET bit to go high */
+	usleep_range(50, 55);
+
+	/* Enable PLL output */
+	regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL);
+}
+EXPORT_SYMBOL(clk_huayra_2290_pll_configure);
+
 static unsigned long
 alpha_huayra_pll_calc_rate(u64 prate, u32 l, u32 a)
 {
diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h
index fb6d50263bb9..d1cd52158c17 100644
--- a/drivers/clk/qcom/clk-alpha-pll.h
+++ b/drivers/clk/qcom/clk-alpha-pll.h
@@ -15,6 +15,7 @@ 
 enum {
 	CLK_ALPHA_PLL_TYPE_DEFAULT,
 	CLK_ALPHA_PLL_TYPE_HUAYRA,
+	CLK_ALPHA_PLL_TYPE_HUAYRA_2290,
 	CLK_ALPHA_PLL_TYPE_BRAMMO,
 	CLK_ALPHA_PLL_TYPE_FABIA,
 	CLK_ALPHA_PLL_TYPE_TRION,
@@ -191,6 +192,8 @@  extern const struct clk_ops clk_alpha_pll_rivian_evo_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,
+				   const struct alpha_pll_config *config);
 void clk_fabia_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
 				const struct alpha_pll_config *config);
 void clk_trion_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,