[v5,07/12] clk: imx: Update pllv3 to support i.MXRT1170

Commit Message

Jesse Taube July 23, 2022, 4:05 p.m. UTC

The i.MXRT1170 has a pll that has the multiplier bits inverted and
cannot be changed add IMX_PLLV3_GENERICV2.

The i.MXRT1170 also has the lock bit moved as well as the
power bit inverted the power bit also is in different locations on each
pll control register.

Signed-off-by: Jesse Taube <[e-mail]>
---
V1 -> V2:
 - Nothing done
V2 -> V3:
 - Nothing done
V3 -> V4:
 - Nothing done
V4 -> V5:
 - Add __imx_clk_hw_pllv3 to change power bit
 - Add BM_PLL_POWER and imx_clk_hw_pllv3 to header
 - Remove imx_clk_hw_pll3_powerbit
---
 drivers/clk/imx/clk-pllv3.c | 57 +++++++++++++++++++++++++++++++++----
 drivers/clk/imx/clk.h       | 11 +++++++
 2 files changed, 62 insertions(+), 6 deletions(-)

Patch

diff --git a/drivers/clk/imx/clk-pllv3.c b/drivers/clk/imx/clk-pllv3.c
index eea32f87c60a..68b1498cafe1 100644
--- a/drivers/clk/imx/clk-pllv3.c
+++ b/drivers/clk/imx/clk-pllv3.c
@@ -21,8 +21,8 @@ 
 #define PLL_VF610_NUM_OFFSET	0x20
 #define PLL_VF610_DENOM_OFFSET	0x30
 
-#define BM_PLL_POWER		(0x1 << 12)
 #define BM_PLL_LOCK		(0x1 << 31)
+#define BM_PLL_LOCK_V2		(0x1 << 29)
 #define IMX7_ENET_PLL_POWER	(0x1 << 5)
 #define IMX7_DDR_PLL_POWER	(0x1 << 20)
 
@@ -34,6 +34,7 @@ 
  * @base:	 base address of PLL registers
  * @power_bit:	 pll power bit mask
  * @powerup_set: set power_bit to power up the PLL
+ * @lock_bit:	 pll lock bit mask
  * @div_mask:	 mask of divider bits
  * @div_shift:	 shift of divider bits
  * @ref_clock:	reference clock rate
@@ -48,6 +49,7 @@  struct clk_pllv3 {
 	void __iomem	*base;
 	u32		power_bit;
 	bool		powerup_set;
+	u32		lock_bit;
 	u32		div_mask;
 	u32		div_shift;
 	unsigned long	ref_clock;
@@ -65,7 +67,7 @@  static int clk_pllv3_wait_lock(struct clk_pllv3 *pll)
 	if ((pll->powerup_set && !val) || (!pll->powerup_set && val))
 		return 0;
 
-	return readl_relaxed_poll_timeout(pll->base, val, val & BM_PLL_LOCK,
+	return readl_relaxed_poll_timeout(pll->base, val, val & pll->lock_bit,
 					  500, PLL_LOCK_TIMEOUT);
 }
 
@@ -101,7 +103,7 @@  static int clk_pllv3_is_prepared(struct clk_hw *hw)
 {
 	struct clk_pllv3 *pll = to_clk_pllv3(hw);
 
-	if (readl_relaxed(pll->base) & BM_PLL_LOCK)
+	if (readl_relaxed(pll->base) & pll->lock_bit)
 		return 1;
 
 	return 0;
@@ -155,6 +157,39 @@  static const struct clk_ops clk_pllv3_ops = {
 	.set_rate	= clk_pllv3_set_rate,
 };
 
+static int clk_pllv3_genericv2_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	struct clk_pllv3 *pll = to_clk_pllv3(hw);
+	u32 val, div;
+
+	div = (readl_relaxed(pll->base) >> pll->div_shift) & pll->div_mask;
+	val = (div == 0) ? parent_rate * 22 : parent_rate * 20;
+
+	if (rate == val)
+		return 0;
+
+	return -EINVAL;
+}
+
+static unsigned long clk_pllv3_genericv2_recalc_rate(struct clk_hw *hw,
+					   unsigned long parent_rate)
+{
+	struct clk_pllv3 *pll = to_clk_pllv3(hw);
+	u32 div = (readl_relaxed(pll->base) >> pll->div_shift)  & pll->div_mask;
+
+	return (div == 0) ? parent_rate * 22 : parent_rate * 20;
+}
+
+static const struct clk_ops clk_pllv3_genericv2_ops = {
+	.prepare	= clk_pllv3_prepare,
+	.unprepare	= clk_pllv3_unprepare,
+	.is_prepared	= clk_pllv3_is_prepared,
+	.recalc_rate	= clk_pllv3_genericv2_recalc_rate,
+	.round_rate	= clk_pllv3_round_rate,
+	.set_rate	= clk_pllv3_genericv2_set_rate,
+};
+
 static unsigned long clk_pllv3_sys_recalc_rate(struct clk_hw *hw,
 					       unsigned long parent_rate)
 {
@@ -407,9 +442,9 @@  static const struct clk_ops clk_pllv3_enet_ops = {
 	.recalc_rate	= clk_pllv3_enet_recalc_rate,
 };
 
-struct clk_hw *imx_clk_hw_pllv3(enum imx_pllv3_type type, const char *name,
+struct clk_hw *__imx_clk_hw_pllv3(enum imx_pllv3_type type, const char *name,
 			  const char *parent_name, void __iomem *base,
-			  u32 div_mask)
+			  u32 div_mask, u8 pwr_bit)
 {
 	struct clk_pllv3 *pll;
 	const struct clk_ops *ops;
@@ -421,11 +456,21 @@  struct clk_hw *imx_clk_hw_pllv3(enum imx_pllv3_type type, const char *name,
 	if (!pll)
 		return ERR_PTR(-ENOMEM);
 
-	pll->power_bit = BM_PLL_POWER;
+	pll->power_bit = pwr_bit;
+	pll->lock_bit = BM_PLL_LOCK;
 	pll->num_offset = PLL_NUM_OFFSET;
 	pll->denom_offset = PLL_DENOM_OFFSET;
 
 	switch (type) {
+	case IMX_PLLV3_GENERICV2:
+		pll->lock_bit = BM_PLL_LOCK_V2;
+		pll->powerup_set = true;
+		ops = &clk_pllv3_genericv2_ops;
+		break;
+	case IMX_PLLV3_SYSV2:
+		pll->lock_bit = BM_PLL_LOCK_V2;
+		pll->powerup_set = true;
+		fallthrough;
 	case IMX_PLLV3_SYS:
 		ops = &clk_pllv3_sys_ops;
 		break;
diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index 5061a06468df..782100b2846d 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -6,6 +6,8 @@ 
 #include <linux/spinlock.h>
 #include <linux/clk-provider.h>
 
+#define BM_PLL_POWER		(0x1 << 12)
+
 extern spinlock_t imx_ccm_lock;
 extern bool mcore_booted;
 
@@ -102,6 +104,11 @@  extern struct imx_fracn_gppll_clk imx_fracn_gppll;
 	to_clk(clk_hw_register_gate2(dev, name, parent_name, flags, reg, bit_idx, \
 				cgr_val, cgr_mask, clk_gate_flags, lock, share_count))
 
+#define imx_clk_hw_pllv3(name, parent_names, num_parents, parent,       \
+				bypass1, bypass2, base, flags)          \
+	__imx_clk_hw_pllv3(name, parent_names, num_parents, parent,     \
+				bypass1, bypass2, base, flags, BM_PLL_POWER)
+
 #define imx_clk_pllv3(type, name, parent_name, base, div_mask) \
 	to_clk(imx_clk_hw_pllv3(type, name, parent_name, base, div_mask))
 
@@ -242,6 +249,8 @@  struct clk_hw *imx_clk_hw_sscg_pll(const char *name,
 
 enum imx_pllv3_type {
 	IMX_PLLV3_GENERIC,
+	IMX_PLLV3_GENERICV2,
+	IMX_PLLV3_SYSV2,
 	IMX_PLLV3_SYS,
 	IMX_PLLV3_USB,
 	IMX_PLLV3_USB_VF610,
@@ -253,6 +262,8 @@  enum imx_pllv3_type {
 	IMX_PLLV3_AV_IMX7,
 };
 
+void imx_clk_hw_pll3_powerbit(struct clk_hw *hw, u8 shift);
+
 struct clk_hw *imx_clk_hw_pllv3(enum imx_pllv3_type type, const char *name,
 		const char *parent_name, void __iomem *base, u32 div_mask);