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: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -154,6 +154,7 @@ int qe_get_snum(void);
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void qe_put_snum(u8 snum);
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void qe_put_snum(u8 snum);
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unsigned int qe_get_num_of_risc(void);
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unsigned int qe_get_num_of_risc(void);
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unsigned int qe_get_num_of_snums(void);
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unsigned int qe_get_num_of_snums(void);
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int qe_alive_during_sleep(void);
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/* we actually use cpm_muram implementation, define this for convenience */
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/* we actually use cpm_muram implementation, define this for convenience */
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#define qe_muram_init cpm_muram_init
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#define qe_muram_init cpm_muram_init
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@ -65,6 +65,19 @@ static unsigned int qe_num_of_snum;
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static phys_addr_t qebase = -1;
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static phys_addr_t qebase = -1;
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int qe_alive_during_sleep(void)
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{
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static int ret = -1;
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if (ret != -1)
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return ret;
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ret = !of_find_compatible_node(NULL, NULL, "fsl,mpc8569-pmc");
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return ret;
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}
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EXPORT_SYMBOL(qe_alive_during_sleep);
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phys_addr_t get_qe_base(void)
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phys_addr_t get_qe_base(void)
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{
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{
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struct device_node *qe;
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struct device_node *qe;
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