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path: root/drivers/clk/keystone/pll.c
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Diffstat (limited to 'drivers/clk/keystone/pll.c')
-rw-r--r--drivers/clk/keystone/pll.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/clk/keystone/pll.c b/drivers/clk/keystone/pll.c
index 47a1bd9f1726..0dd8a4b12747 100644
--- a/drivers/clk/keystone/pll.c
+++ b/drivers/clk/keystone/pll.c
@@ -24,6 +24,8 @@
#define MAIN_PLLM_HIGH_MASK 0x7f000
#define PLLM_HIGH_SHIFT 6
#define PLLD_MASK 0x3f
+#define CLKOD_MASK 0x780000
+#define CLKOD_SHIFT 19
/**
* struct clk_pll_data - pll data structure
@@ -41,7 +43,10 @@
* @pllm_upper_mask: multiplier upper mask
* @pllm_upper_shift: multiplier upper shift
* @plld_mask: divider mask
- * @postdiv: Post divider
+ * @clkod_mask: output divider mask
+ * @clkod_shift: output divider shift
+ * @plld_mask: divider mask
+ * @postdiv: Fixed post divider
*/
struct clk_pll_data {
bool has_pllctrl;
@@ -53,6 +58,8 @@ struct clk_pll_data {
u32 pllm_upper_mask;
u32 pllm_upper_shift;
u32 plld_mask;
+ u32 clkod_mask;
+ u32 clkod_shift;
u32 postdiv;
};
@@ -90,7 +97,13 @@ static unsigned long clk_pllclk_recalc(struct clk_hw *hw,
mult |= ((val & pll_data->pllm_upper_mask)
>> pll_data->pllm_upper_shift);
prediv = (val & pll_data->plld_mask);
- postdiv = pll_data->postdiv;
+
+ if (!pll_data->has_pllctrl)
+ /* read post divider from od bits*/
+ postdiv = ((val & pll_data->clkod_mask) >>
+ pll_data->clkod_shift) + 1;
+ else
+ postdiv = pll_data->postdiv;
rate /= (prediv + 1);
rate = (rate * (mult + 1));
@@ -155,8 +168,11 @@ static void __init _of_pll_clk_init(struct device_node *node, bool pllctrl)
}
parent_name = of_clk_get_parent_name(node, 0);
- if (of_property_read_u32(node, "fixed-postdiv", &pll_data->postdiv))
- goto out;
+ if (of_property_read_u32(node, "fixed-postdiv", &pll_data->postdiv)) {
+ /* assume the PLL has output divider register bits */
+ pll_data->clkod_mask = CLKOD_MASK;
+ pll_data->clkod_shift = CLKOD_SHIFT;
+ }
i = of_property_match_string(node, "reg-names", "control");
pll_data->pll_ctl0 = of_iomap(node, i);