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Commit ed24157e authored by Anton Vorontsov's avatar Anton Vorontsov Committed by David S. Miller
Browse files

powerpc/qe: Implement qe_alive_during_sleep() helper function 



In some CPUs (i.e. MPC8569) QE shuts down completely during sleep,
drivers may want to know that to reinitialize registers and buffer
descriptors.

This patch implements qe_alive_during_sleep() helper function, so far
it just checks if MPC8569-compatible power management controller is
present, which is a sign that QE turns off during sleep.

Signed-off-by: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e0ad2cd8

arch/powerpc/include/asm/qe.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -154,6 +154,7 @@ int qe_get_snum(void); 
void qe_put_snum(u8 snum);

void qe_put_snum(u8 snum);

unsigned int qe_get_num_of_risc(void);

unsigned int qe_get_num_of_risc(void);

unsigned int qe_get_num_of_snums(void);

unsigned int qe_get_num_of_snums(void);

int qe_alive_during_sleep(void);





/* we actually use cpm_muram implementation, define this for convenience */

/* we actually use cpm_muram implementation, define this for convenience */

#define qe_muram_init cpm_muram_init

#define qe_muram_init cpm_muram_init

arch/powerpc/sysdev/qe_lib/qe.c

+13 −0
Original line number Original line Diff line number Diff line
@@ -65,6 +65,19 @@ static unsigned int qe_num_of_snum; 




static phys_addr_t qebase = -1;

static phys_addr_t qebase = -1;





int qe_alive_during_sleep(void)

{

	static int ret = -1;



	if (ret != -1)

		return ret;



	ret = !of_find_compatible_node(NULL, NULL, "fsl,mpc8569-pmc");



	return ret;

}

EXPORT_SYMBOL(qe_alive_during_sleep);



phys_addr_t get_qe_base(void)

phys_addr_t get_qe_base(void)

{

{

	struct device_node *qe;

	struct device_node *qe;