clk: at91: master: Add sam9x60 support

The sam9x60 cpu clock is located at a different offset but is otherwise
similar to the master clock.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/at91/clk-master.c

@@ -29,6 +29,7 @@ struct clk_master {
 	struct regmap *regmap;
 	const struct clk_master_layout *layout;
 	const struct clk_master_characteristics *characteristics;
+	u32 mckr;
 };
 
 static inline bool clk_master_ready(struct regmap *regmap)
@@ -69,7 +70,7 @@ static unsigned long clk_master_recalc_rate(struct clk_hw *hw,
 						master->characteristics;
 	unsigned int mckr;
 
-	regmap_read(master->regmap, AT91_PMC_MCKR, &mckr);
+	regmap_read(master->regmap, master->layout->offset, &mckr);
 	mckr &= layout->mask;
 
 	pres = (mckr >> layout->pres_shift) & MASTER_PRES_MASK;
@@ -95,7 +96,7 @@ static u8 clk_master_get_parent(struct clk_hw *hw)
 	struct clk_master *master = to_clk_master(hw);
 	unsigned int mckr;
 
-	regmap_read(master->regmap, AT91_PMC_MCKR, &mckr);
+	regmap_read(master->regmap, master->layout->offset, &mckr);
 
 	return mckr & AT91_PMC_CSS;
 }
@@ -147,13 +148,14 @@ at91_clk_register_master(struct regmap *regmap,
 	return hw;
 }
 
-
 const struct clk_master_layout at91rm9200_master_layout = {
 	.mask = 0x31F,
 	.pres_shift = 2,
+	.offset = AT91_PMC_MCKR,
 };
 
 const struct clk_master_layout at91sam9x5_master_layout = {
 	.mask = 0x373,
 	.pres_shift = 4,
+	.offset = AT91_PMC_MCKR,
 };

drivers/clk/at91/pmc.h

@@ -38,6 +38,7 @@ struct clk_range {
 #define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,}
 
 struct clk_master_layout {
+	u32 offset;
 	u32 mask;
 	u8 pres_shift;
 };

include/linux/clk/at91_pmc.h

@@ -74,6 +74,8 @@
 #define			AT91_PMC_USBDIV_4		(2 << 28)
 #define		AT91_PMC_USB96M		(1     << 28)		/* Divider by 2 Enable (PLLB only) */
 
+#define AT91_PMC_CPU_CKR	0x28			/* CPU Clock Register */
+
 #define	AT91_PMC_MCKR		0x30			/* Master Clock Register */
 #define		AT91_PMC_CSS		(3 <<  0)		/* Master Clock Selection */
 #define			AT91_PMC_CSS_SLOW		(0 << 0)