clk: sunxi-ng: a64: Add constraints on PLL-MIPI's n/m ratio and parent rate

The Allwinner A64 manual lists the following constraints for the
PLL-MIPI clock:
 - M/N <= 3
 - (PLL_VIDEO0)/M >= 24MHz

Use these constraints.

Reviewed-by: Jernej Skrabec <[email protected]>
Signed-off-by: Frank Oltmanns <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jernej Skrabec <[email protected]>

Author: Frank Oltmanns

drivers/clk/sunxi-ng/ccu-sun50i-a64.c

@@ -171,11 +171,13 @@ static struct ccu_nkm pll_mipi_clk = {
 	 * user manual, and by experiments the PLL doesn't work without
 	 * these bits toggled.
 	 */
-	.enable		= BIT(31) | BIT(23) | BIT(22),
-	.lock		= BIT(28),
-	.n		= _SUNXI_CCU_MULT(8, 4),
-	.k		= _SUNXI_CCU_MULT_MIN(4, 2, 2),
-	.m		= _SUNXI_CCU_DIV(0, 4),
+	.enable			= BIT(31) | BIT(23) | BIT(22),
+	.lock			= BIT(28),
+	.n			= _SUNXI_CCU_MULT(8, 4),
+	.k			= _SUNXI_CCU_MULT_MIN(4, 2, 2),
+	.m			= _SUNXI_CCU_DIV(0, 4),
+	.max_m_n_ratio		= 3,
+	.min_parent_m_ratio	= 24000000,
 	.common		= {
 		.reg		= 0x040,
 		.hw.init	= CLK_HW_INIT("pll-mipi", "pll-video0",