1 files changed, 36 insertions, 10 deletions

diff --git a/drivers/clk/imx/clk-pllv4.c b/drivers/clk/imx/clk-pllv4.c
index 6e7e34571fc8..9b136c951762 100644
--- a/drivers/clk/imx/clk-pllv4.c
+++ b/drivers/clk/imx/clk-pllv4.c
@@ -44,11 +44,15 @@ struct clk_pllv4 {
 	u32		cfg_offset;
 	u32		num_offset;
 	u32		denom_offset;
+	bool		use_mult_range;
 };
 
 /* Valid PLL MULT Table */
 static const int pllv4_mult_table[] = {33, 27, 22, 20, 17, 16};
 
+/* Valid PLL MULT range, (max, min) */
+static const int pllv4_mult_range[] = {54, 27};
+
 #define to_clk_pllv4(__hw) container_of(__hw, struct clk_pllv4, hw)
 
 #define LOCK_TIMEOUT_US		USEC_PER_MSEC
@@ -94,17 +98,30 @@ static unsigned long clk_pllv4_recalc_rate(struct clk_hw *hw,
 static long clk_pllv4_round_rate(struct clk_hw *hw, unsigned long rate,
 				 unsigned long *prate)
 {
+	struct clk_pllv4 *pll = to_clk_pllv4(hw);
 	unsigned long parent_rate = *prate;
 	unsigned long round_rate, i;
 	u32 mfn, mfd = DEFAULT_MFD;
 	bool found = false;
 	u64 temp64;
-
-	for (i = 0; i < ARRAY_SIZE(pllv4_mult_table); i++) {
-		round_rate = parent_rate * pllv4_mult_table[i];
-		if (rate >= round_rate) {
+	u32 mult;
+
+	if (pll->use_mult_range) {
+		temp64 = (u64)rate;
+		do_div(temp64, parent_rate);
+		mult = temp64;
+		if (mult >= pllv4_mult_range[1] &&
+		    mult <= pllv4_mult_range[0]) {
+			round_rate = parent_rate * mult;
 			found = true;
-			break;
+		}
+	} else {
+		for (i = 0; i < ARRAY_SIZE(pllv4_mult_table); i++) {
+			round_rate = parent_rate * pllv4_mult_table[i];
+			if (rate >= round_rate) {
+				found = true;
+				break;
+			}
 		}
 	}
 
@@ -138,14 +155,20 @@ static long clk_pllv4_round_rate(struct clk_hw *hw, unsigned long rate,
 	return round_rate + (u32)temp64;
 }
 
-static bool clk_pllv4_is_valid_mult(unsigned int mult)
+static bool clk_pllv4_is_valid_mult(struct clk_pllv4 *pll, unsigned int mult)
 {
 	int i;
 
 	/* check if mult is in valid MULT table */
-	for (i = 0; i < ARRAY_SIZE(pllv4_mult_table); i++) {
-		if (pllv4_mult_table[i] == mult)
+	if (pll->use_mult_range) {
+		if (mult >= pllv4_mult_range[1] &&
+		    mult <= pllv4_mult_range[0])
 			return true;
+	} else {
+		for (i = 0; i < ARRAY_SIZE(pllv4_mult_table); i++) {
+			if (pllv4_mult_table[i] == mult)
+				return true;
+		}
 	}
 
 	return false;
@@ -160,7 +183,7 @@ static int clk_pllv4_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	mult = rate / parent_rate;
 
-	if (!clk_pllv4_is_valid_mult(mult))
+	if (!clk_pllv4_is_valid_mult(pll, mult))
 		return -EINVAL;
 
 	if (parent_rate <= MAX_MFD)
@@ -227,10 +250,13 @@ struct clk_hw *imx_clk_hw_pllv4(enum imx_pllv4_type type, const char *name,
 
 	pll->base = base;
 
-	if (type == IMX_PLLV4_IMX8ULP) {
+	if (type == IMX_PLLV4_IMX8ULP ||
+	    type == IMX_PLLV4_IMX8ULP_1GHZ) {
 		pll->cfg_offset = IMX8ULP_PLL_CFG_OFFSET;
 		pll->num_offset = IMX8ULP_PLL_NUM_OFFSET;
 		pll->denom_offset = IMX8ULP_PLL_DENOM_OFFSET;
+		if (type == IMX_PLLV4_IMX8ULP_1GHZ)
+			pll->use_mult_range = true;
 	} else {
 		pll->cfg_offset = PLL_CFG_OFFSET;
 		pll->num_offset = PLL_NUM_OFFSET;