Merge tag 'clk-microchip-6.12' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into clk-microchip

bebarino · bebarino · commit 1d777b05da6a · 2024-09-03T13:03:10.000-07:00
Pull Microchip clk driver updates from Claudiu Beznea: - support for the Microchip SAM9X7 SoC as follows: - updates on the PLL drivers - a new clock driver was added for SAM9X7 - dt-binding documentation updates (for the new clock driver and for the slow clock controller that SAM9X7 is using) - a fix for the Microchip SAMA7G5 clock driver to avoid allocating mode than necessary memory * tag 'clk-microchip-6.12' of https://git.kernel.org/pub/scm/linux/kernel/git/at91/linux: clk: at91: sama7g5: Allocate only the needed amount of memory for PLLs clk: at91: sam9x7: add sam9x7 pmc driver dt-bindings: clock: at91: Allow PLLs to be exported and referenced in DT clk: at91: sama7g5: move mux table macros to header file clk: at91: sam9x7: add support for HW PLL freq dividers clk: at91: clk-sam9x60-pll: re-factor to support individual core freq outputs dt-bindings: clocks: atmel,at91rm9200-pmc: add sam9x7 clock controller dt-bindings: clocks: atmel,at91sam9x5-sckc: add sam9x7
diff --git a/Documentation/devicetree/bindings/clock/atmel,at91rm9200-pmc.yaml b/Documentation/devicetree/bindings/clock/atmel,at91rm9200-pmc.yaml
@@ -42,6 +42,7 @@ properties:
               - atmel,sama5d3-pmc
               - atmel,sama5d4-pmc
               - microchip,sam9x60-pmc
+              - microchip,sam9x7-pmc
               - microchip,sama7g5-pmc
           - const: syscon
 
@@ -88,6 +89,7 @@ allOf:
           contains:
             enum:
               - microchip,sam9x60-pmc
+              - microchip,sam9x7-pmc
               - microchip,sama7g5-pmc
     then:
       properties:
diff --git a/Documentation/devicetree/bindings/clock/atmel,at91sam9x5-sckc.yaml b/Documentation/devicetree/bindings/clock/atmel,at91sam9x5-sckc.yaml
@@ -18,7 +18,9 @@ properties:
           - atmel,sama5d4-sckc
           - microchip,sam9x60-sckc
       - items:
-          - const: microchip,sama7g5-sckc
+          - enum:
+              - microchip,sam9x7-sckc
+              - microchip,sama7g5-sckc
           - const: microchip,sam9x60-sckc
 
   reg:
diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_SOC_AT91SAM9) += at91sam9260.o at91sam9rl.o at91sam9x5.o dt-compat.
 obj-$(CONFIG_SOC_AT91SAM9) += at91sam9g45.o dt-compat.o
 obj-$(CONFIG_SOC_AT91SAM9) += at91sam9n12.o at91sam9x5.o dt-compat.o
 obj-$(CONFIG_SOC_SAM9X60) += sam9x60.o
+obj-$(CONFIG_SOC_SAM9X7) += sam9x7.o
 obj-$(CONFIG_SOC_SAMA5D3) += sama5d3.o dt-compat.o
 obj-$(CONFIG_SOC_SAMA5D4) += sama5d4.o dt-compat.o
 obj-$(CONFIG_SOC_SAMA5D2) += sama5d2.o dt-compat.o
diff --git a/drivers/clk/at91/clk-sam9x60-pll.c b/drivers/clk/at91/clk-sam9x60-pll.c
@@ -23,9 +23,6 @@
 #define UPLL_DIV		2
 #define PLL_MUL_MAX		(FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, UINT_MAX) + 1)
 
-#define FCORE_MIN		(600000000)
-#define FCORE_MAX		(1200000000)
-
 #define PLL_MAX_ID		7
 
 struct sam9x60_pll_core {
@@ -76,9 +73,15 @@ static unsigned long sam9x60_frac_pll_recalc_rate(struct clk_hw *hw,
 {
 	struct sam9x60_pll_core *core = to_sam9x60_pll_core(hw);
 	struct sam9x60_frac *frac = to_sam9x60_frac(core);
+	unsigned long freq;
 
-	return parent_rate * (frac->mul + 1) +
+	freq = parent_rate * (frac->mul + 1) +
 		DIV_ROUND_CLOSEST_ULL((u64)parent_rate * frac->frac, (1 << 22));
+
+	if (core->layout->div2)
+		freq >>= 1;
+
+	return freq;
 }
 
 static int sam9x60_frac_pll_set(struct sam9x60_pll_core *core)
@@ -194,7 +197,8 @@ static long sam9x60_frac_pll_compute_mul_frac(struct sam9x60_pll_core *core,
 	unsigned long nmul = 0;
 	unsigned long nfrac = 0;
 
-	if (rate < FCORE_MIN || rate > FCORE_MAX)
+	if (rate < core->characteristics->core_output[0].min ||
+	    rate > core->characteristics->core_output[0].max)
 		return -ERANGE;
 
 	/*
@@ -214,7 +218,8 @@ static long sam9x60_frac_pll_compute_mul_frac(struct sam9x60_pll_core *core,
 	}
 
 	/* Check if resulted rate is a valid.  */
-	if (tmprate < FCORE_MIN || tmprate > FCORE_MAX)
+	if (tmprate < core->characteristics->core_output[0].min ||
+	    tmprate > core->characteristics->core_output[0].max)
 		return -ERANGE;
 
 	if (update) {
@@ -433,6 +438,12 @@ static unsigned long sam9x60_div_pll_recalc_rate(struct clk_hw *hw,
 	return DIV_ROUND_CLOSEST_ULL(parent_rate, (div->div + 1));
 }
 
+static unsigned long sam9x60_fixed_div_pll_recalc_rate(struct clk_hw *hw,
+						       unsigned long parent_rate)
+{
+	return parent_rate >> 1;
+}
+
 static long sam9x60_div_pll_compute_div(struct sam9x60_pll_core *core,
 					unsigned long *parent_rate,
 					unsigned long rate)
@@ -607,6 +618,16 @@ static const struct clk_ops sam9x60_div_pll_ops_chg = {
 	.restore_context = sam9x60_div_pll_restore_context,
 };
 
+static const struct clk_ops sam9x60_fixed_div_pll_ops = {
+	.prepare = sam9x60_div_pll_prepare,
+	.unprepare = sam9x60_div_pll_unprepare,
+	.is_prepared = sam9x60_div_pll_is_prepared,
+	.recalc_rate = sam9x60_fixed_div_pll_recalc_rate,
+	.round_rate = sam9x60_div_pll_round_rate,
+	.save_context = sam9x60_div_pll_save_context,
+	.restore_context = sam9x60_div_pll_restore_context,
+};
+
 struct clk_hw * __init
 sam9x60_clk_register_frac_pll(struct regmap *regmap, spinlock_t *lock,
 			      const char *name, const char *parent_name,
@@ -669,7 +690,8 @@ sam9x60_clk_register_frac_pll(struct regmap *regmap, spinlock_t *lock,
 			goto free;
 		}
 
-		ret = sam9x60_frac_pll_compute_mul_frac(&frac->core, FCORE_MIN,
+		ret = sam9x60_frac_pll_compute_mul_frac(&frac->core,
+							characteristics->core_output[0].min,
 							parent_rate, true);
 		if (ret < 0) {
 			hw = ERR_PTR(ret);
@@ -725,10 +747,14 @@ sam9x60_clk_register_div_pll(struct regmap *regmap, spinlock_t *lock,
 	else
 		init.parent_names = &parent_name;
 	init.num_parents = 1;
-	if (flags & CLK_SET_RATE_GATE)
+
+	if (layout->div2)
+		init.ops = &sam9x60_fixed_div_pll_ops;
+	else if (flags & CLK_SET_RATE_GATE)
 		init.ops = &sam9x60_div_pll_ops;
 	else
 		init.ops = &sam9x60_div_pll_ops_chg;
+
 	init.flags = flags;
 
 	div->core.id = id;
diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
@@ -64,6 +64,7 @@ struct clk_pll_layout {
 	u8 frac_shift;
 	u8 div_shift;
 	u8 endiv_shift;
+	u8 div2;
 };
 
 extern const struct clk_pll_layout at91rm9200_pll_layout;
@@ -75,6 +76,7 @@ struct clk_pll_characteristics {
 	struct clk_range input;
 	int num_output;
 	const struct clk_range *output;
+	const struct clk_range *core_output;
 	u16 *icpll;
 	u8 *out;
 	u8 upll : 1;
@@ -119,6 +121,22 @@ struct at91_clk_pms {
 
 #define ndck(a, s) (a[s - 1].id + 1)
 #define nck(a) (a[ARRAY_SIZE(a) - 1].id + 1)
+
+#define PMC_INIT_TABLE(_table, _count)			\
+	do {						\
+		u8 _i;					\
+		for (_i = 0; _i < (_count); _i++)	\
+			(_table)[_i] = _i;		\
+	} while (0)
+
+#define PMC_FILL_TABLE(_to, _from, _count)		\
+	do {						\
+		u8 _i;					\
+		for (_i = 0; _i < (_count); _i++) {	\
+			(_to)[_i] = (_from)[_i];	\
+		}					\
+	} while (0)
+
 struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
 				   unsigned int nperiph, unsigned int ngck,
 				   unsigned int npck);
diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c
@@ -26,10 +26,16 @@ static const struct clk_range plla_outputs[] = {
 	{ .min = 2343750, .max = 1200000000 },
 };
 
+/* Fractional PLL core output range. */
+static const struct clk_range core_outputs[] = {
+	{ .min = 600000000, .max = 1200000000 },
+};
+
 static const struct clk_pll_characteristics plla_characteristics = {
 	.input = { .min = 12000000, .max = 48000000 },
 	.num_output = ARRAY_SIZE(plla_outputs),
 	.output = plla_outputs,
+	.core_output = core_outputs,
 };
 
 static const struct clk_range upll_outputs[] = {
@@ -40,6 +46,7 @@ static const struct clk_pll_characteristics upll_characteristics = {
 	.input = { .min = 12000000, .max = 48000000 },
 	.num_output = ARRAY_SIZE(upll_outputs),
 	.output = upll_outputs,
+	.core_output = core_outputs,
 	.upll = true,
 };
 
diff --git a/drivers/clk/at91/sam9x7.c b/drivers/clk/at91/sam9x7.c
diff --git a/drivers/clk/at91/sama7g5.c b/drivers/clk/at91/sama7g5.c
diff --git a/include/dt-bindings/clock/at91.h b/include/dt-bindings/clock/at91.h
