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mailbox: pcc: Rename doorbell ack to platform interrupt ack register

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The specification refers this register and associated bitmask as platform
interrupt acknowledge register. Let us rename it so that it is easier to
map and understand.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Sudeep Holla 2021-09-17 14:33:51 +01:00 committed by Jassi Brar
parent 7b6da7fe7b
commit f92ae90e52
1 changed files with 17 additions and 16 deletions
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33
drivers/mailbox/pcc.c
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@ -69,14 +69,15 @@ static struct mbox_chan *pcc_mbox_channels;
*
* @chan: PCC channel information with Shared Memory Region info
* @db_vaddr: cached virtual address for doorbell register
* @db_ack_vaddr: cached virtual address for doorbell ack register
* @db_irq: doorbell interrupt
* @plat_irq_ack_vaddr: cached virtual address for platform interrupt
* acknowledge register
* @plat_irq: platform interrupt
*/
struct pcc_chan_info {
struct pcc_mbox_chan chan;
void __iomem *db_vaddr;
void __iomem *db_ack_vaddr;
int db_irq;
void __iomem *plat_irq_ack_vaddr;
int plat_irq;
};
#define to_pcc_chan_info(c) container_of(c, struct pcc_chan_info, chan)
@ -198,12 +199,12 @@ static irqreturn_t pcc_mbox_irq(int irq, void *p)
doorbell_ack_preserve = pcct2_ss->ack_preserve_mask;
doorbell_ack_write = pcct2_ss->ack_write_mask;
ret = read_register(pchan->db_ack_vaddr,
ret = read_register(pchan->plat_irq_ack_vaddr,
&doorbell_ack_val, doorbell_ack->bit_width);
if (ret)
return IRQ_NONE;
ret = write_register(pchan->db_ack_vaddr,
ret = write_register(pchan->plat_irq_ack_vaddr,
(doorbell_ack_val & doorbell_ack_preserve)
| doorbell_ack_write,
doorbell_ack->bit_width);
@ -256,14 +257,14 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
spin_unlock_irqrestore(&chan->lock, flags);
if (pchan->db_irq > 0) {
if (pchan->plat_irq > 0) {
int rc;
rc = devm_request_irq(dev, pchan->db_irq, pcc_mbox_irq, 0,
rc = devm_request_irq(dev, pchan->plat_irq, pcc_mbox_irq, 0,
MBOX_IRQ_NAME, chan);
if (unlikely(rc)) {
dev_err(dev, "failed to register PCC interrupt %d\n",
pchan->db_irq);
pchan->plat_irq);
pcc_mbox_free_channel(&pchan->chan);
return ERR_PTR(rc);
}
@ -288,8 +289,8 @@ void pcc_mbox_free_channel(struct pcc_mbox_chan *pchan)
if (!chan || !chan->cl)
return;
if (pchan_info->db_irq > 0)
devm_free_irq(chan->mbox->dev, pchan_info->db_irq, chan);
if (pchan_info->plat_irq > 0)
devm_free_irq(chan->mbox->dev, pchan_info->plat_irq, chan);
spin_lock_irqsave(&chan->lock, flags);
chan->cl = NULL;
@ -400,9 +401,9 @@ static int pcc_parse_subspace_irq(struct pcc_chan_info *pchan,
return 0;
pcct_ss = (struct acpi_pcct_hw_reduced *)pcct_entry;
pchan->db_irq = pcc_map_interrupt(pcct_ss->platform_interrupt,
(u32)pcct_ss->flags);
if (pchan->db_irq <= 0) {
pchan->plat_irq = pcc_map_interrupt(pcct_ss->platform_interrupt,
(u32)pcct_ss->flags);
if (pchan->plat_irq <= 0) {
pr_err("PCC GSI %d not registered\n",
pcct_ss->platform_interrupt);
return -EINVAL;
@ -411,10 +412,10 @@ static int pcc_parse_subspace_irq(struct pcc_chan_info *pchan,
if (pcct_ss->header.type == ACPI_PCCT_TYPE_HW_REDUCED_SUBSPACE_TYPE2) {
struct acpi_pcct_hw_reduced_type2 *pcct2_ss = (void *)pcct_ss;
pchan->db_ack_vaddr =
pchan->plat_irq_ack_vaddr =
acpi_os_ioremap(pcct2_ss->platform_ack_register.address,
pcct2_ss->platform_ack_register.bit_width / 8);
if (!pchan->db_ack_vaddr) {
if (!pchan->plat_irq_ack_vaddr) {
pr_err("Failed to ioremap PCC ACK register\n");
return -ENOMEM;
}