clk: qcom: flag for 64 bit CONFIG_CTL

Some of the Alpha PLLs (like Spark and Brammo) don't have a
CONFIG_CTL_U register. Add logic to detect when PLLs don't have
this second config register and skip programming it during PLL
initialization.

Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/qcom/clk-alpha-pll.c

@@ -82,6 +82,8 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs);
 		((PLL_ALPHA_VAL_U(p) - PLL_ALPHA_VAL(p) == 4) ?	\
 				 ALPHA_REG_BITWIDTH : ALPHA_REG_16BIT_WIDTH)
 
+#define pll_has_64bit_config(p)	((PLL_CONFIG_CTL_U(p) - PLL_CONFIG_CTL(p)) == 4)
+
 #define to_clk_alpha_pll(_hw) container_of(to_clk_regmap(_hw), \
 					   struct clk_alpha_pll, clkr)
 
@@ -136,7 +138,10 @@ void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap,
 	regmap_write(regmap, PLL_L_VAL(pll), config->l);
 	regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha);
 	regmap_write(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val);
-	regmap_write(regmap, PLL_CONFIG_CTL_U(pll), config->config_ctl_hi_val);
+
+	if (pll_has_64bit_config(pll))
+		regmap_write(regmap, PLL_CONFIG_CTL_U(pll),
+			     config->config_ctl_hi_val);
 
 	val = config->main_output_mask;
 	val |= config->aux_output_mask;