[PATCH 2/4] clk: qcom: clk-rcg2: Make sure to not write d=0 to the NMD register

[Nikita Travkin]

Sometimes calculation of d value may result in 0 because of the
rounding after integer division. This causes the following error:

[  113.969689] camss_gp1_clk_src: rcg didn't update its configuration.
[  113.969754] WARNING: CPU: 3 PID: 35 at drivers/clk/qcom/clk-rcg2.c:122 update_config+0xc8/0xdc

Make sure that D value is never zero.

Fixes: 7f891faf596e ("clk: qcom: clk-rcg2: Add support for duty-cycle for RCG")
Signed-off-by: Nikita Travkin <nikita@xxxxxxx>
---
 drivers/clk/qcom/clk-rcg2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index 6964cf914b60..fdfd43e2a01b 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -424,6 +424,10 @@ static int clk_rcg2_set_duty_cycle(struct clk_hw *hw, struct clk_duty *duty)
 	if (d > mask)
 		d = mask;
 
+	/* Hardware can't handle d=0, make sure it's at least 1 */
+	if (!d)
+		d = 1;
+
 	if ((d / 2) > (n - m))
 		d = (n - m) * 2;
 	else if ((d / 2) < (m / 2))
-- 
2.30.2