Commit e5be5370 authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Stephen Boyd
Browse files

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: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 2423eeae

drivers/clk/at91/clk-master.c

+5 −3
Original line number Diff line number Diff line
@@ -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

+1 −0
Original line number Diff line number Diff line
@@ -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

+2 −0
Original line number Diff line number Diff line
@@ -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)