diff --git a/drivers/i3c/master/renesas-i3c.c b/drivers/i3c/master/renesas-i3c.c
index bb1d11693ec9..c1ab4edb3ab3 100644
--- a/drivers/i3c/master/renesas-i3c.c
+++ b/drivers/i3c/master/renesas-i3c.c
@@ -258,10 +258,13 @@ struct renesas_i3c {
 	u32 free_pos;
 	u32 i2c_STDBR;
 	u32 i3c_STDBR;
+	unsigned long rate;
 	u8 addrs[RENESAS_I3C_MAX_DEVS];
 	struct renesas_i3c_xferqueue xferqueue;
 	void __iomem *regs;
 	struct clk_bulk_data *clks;
+	struct reset_control *presetn;
+	struct reset_control *tresetn;
 	u8 num_clks;
 };
 
@@ -482,22 +485,21 @@ static int renesas_i3c_bus_init(struct i3c_master_controller *m)
 	struct i3c_bus *bus = i3c_master_get_bus(m);
 	struct i3c_device_info info = {};
 	struct i2c_timings t;
-	unsigned long rate;
 	u32 double_SBR, val;
 	int cks, pp_high_ticks, pp_low_ticks, i3c_total_ticks;
 	int od_high_ticks, od_low_ticks, i2c_total_ticks;
 	int ret;
 
-	rate = clk_get_rate(i3c->clks[RENESAS_I3C_TCLK_IDX].clk);
-	if (!rate)
+	i3c->rate = clk_get_rate(i3c->clks[RENESAS_I3C_TCLK_IDX].clk);
+	if (!i3c->rate)
 		return -EINVAL;
 
 	ret = renesas_i3c_reset(i3c);
 	if (ret)
 		return ret;
 
-	i2c_total_ticks = DIV_ROUND_UP(rate, bus->scl_rate.i2c);
-	i3c_total_ticks = DIV_ROUND_UP(rate, bus->scl_rate.i3c);
+	i2c_total_ticks = DIV_ROUND_UP(i3c->rate, bus->scl_rate.i2c);
+	i3c_total_ticks = DIV_ROUND_UP(i3c->rate, bus->scl_rate.i3c);
 
 	i2c_parse_fw_timings(&m->dev, &t, true);
 
@@ -510,7 +512,7 @@ static int renesas_i3c_bus_init(struct i3c_master_controller *m)
 			pp_high_ticks = ((i3c_total_ticks * 5) / 10);
 		else
 			pp_high_ticks = DIV_ROUND_UP(I3C_BUS_THIGH_MIXED_MAX_NS,
-						     NSEC_PER_SEC / rate);
+						     NSEC_PER_SEC / i3c->rate);
 		pp_low_ticks = i3c_total_ticks - pp_high_ticks;
 
 		if ((od_low_ticks / 2) <= 0xFF && pp_low_ticks < 0x3F)
@@ -518,7 +520,7 @@ static int renesas_i3c_bus_init(struct i3c_master_controller *m)
 
 		i2c_total_ticks /= 2;
 		i3c_total_ticks /= 2;
-		rate /= 2;
+		i3c->rate /= 2;
 	}
 
 	/* SCL clock period calculation in Open-drain mode */
@@ -539,8 +541,8 @@ static int renesas_i3c_bus_init(struct i3c_master_controller *m)
 			STDBR_SBRLP(pp_low_ticks) |
 			STDBR_SBRHP(pp_high_ticks);
 
-	od_low_ticks -= t.scl_fall_ns / (NSEC_PER_SEC / rate) + 1;
-	od_high_ticks -= t.scl_rise_ns / (NSEC_PER_SEC / rate) + 1;
+	od_low_ticks -= t.scl_fall_ns / (NSEC_PER_SEC / i3c->rate) + 1;
+	od_high_ticks -= t.scl_rise_ns / (NSEC_PER_SEC / i3c->rate) + 1;
 	i3c->i2c_STDBR = (double_SBR ? STDBR_DSBRPO : 0) |
 			STDBR_SBRLO(double_SBR, od_low_ticks) |
 			STDBR_SBRHO(double_SBR, od_high_ticks) |
@@ -591,13 +593,13 @@ static int renesas_i3c_bus_init(struct i3c_master_controller *m)
 	renesas_set_bit(i3c->regs, SCSTRCTL, SCSTRCTL_ACKTWE);
 
 	/* Bus condition timing */
-	val = DIV_ROUND_UP(I3C_BUS_TBUF_MIXED_FM_MIN_NS, NSEC_PER_SEC / rate);
+	val = DIV_ROUND_UP(I3C_BUS_TBUF_MIXED_FM_MIN_NS, NSEC_PER_SEC / i3c->rate);
 	renesas_writel(i3c->regs, BFRECDT, BFRECDT_FRECYC(val));
 
-	val = DIV_ROUND_UP(I3C_BUS_TAVAL_MIN_NS, NSEC_PER_SEC / rate);
+	val = DIV_ROUND_UP(I3C_BUS_TAVAL_MIN_NS, NSEC_PER_SEC / i3c->rate);
 	renesas_writel(i3c->regs, BAVLCDT, BAVLCDT_AVLCYC(val));
 
-	val = DIV_ROUND_UP(I3C_BUS_TIDLE_MIN_NS, NSEC_PER_SEC / rate);
+	val = DIV_ROUND_UP(I3C_BUS_TIDLE_MIN_NS, NSEC_PER_SEC / i3c->rate);
 	renesas_writel(i3c->regs, BIDLCDT, BIDLCDT_IDLCYC(val));
 
 	ret = i3c_master_get_free_addr(m, 0);
@@ -1300,7 +1302,6 @@ static const struct renesas_i3c_irq_desc renesas_i3c_irqs[] = {
 static int renesas_i3c_probe(struct platform_device *pdev)
 {
 	struct renesas_i3c *i3c;
-	struct reset_control *reset;
 	int ret, i;
 
 	i3c = devm_kzalloc(&pdev->dev, sizeof(*i3c), GFP_KERNEL);
@@ -1318,14 +1319,14 @@ static int renesas_i3c_probe(struct platform_device *pdev)
 				     RENESAS_I3C_TCLK_IDX, ret);
 	i3c->num_clks = ret;
 
-	reset = devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, "tresetn");
-	if (IS_ERR(reset))
-		return dev_err_probe(&pdev->dev, PTR_ERR(reset),
+	i3c->tresetn = devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, "tresetn");
+	if (IS_ERR(i3c->tresetn))
+		return dev_err_probe(&pdev->dev, PTR_ERR(i3c->tresetn),
 				     "Error: missing tresetn ctrl\n");
 
-	reset = devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, "presetn");
-	if (IS_ERR(reset))
-		return dev_err_probe(&pdev->dev, PTR_ERR(reset),
+	i3c->presetn = devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, "presetn");
+	if (IS_ERR(i3c->presetn))
+		return dev_err_probe(&pdev->dev, PTR_ERR(i3c->presetn),
 				     "Error: missing presetn ctrl\n");
 
 	spin_lock_init(&i3c->xferqueue.lock);