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EHCI: HSIC: Pass interrupt threshold value as platform data

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Interrupt threshold value is the maximum rate at which HSIC
controller will issue interrupts to processor. Increasing
this value results in fewer interrupts which may save power
as processor has to handle fewer interrupts. Side effect of
increasing this value is higher data latency. For fusion3,
set the ITC(interrupt threshold control) to 5 and default
for other targets. Also, allow ehci stack to set ITC value
per controller basis.

CRs-Fixed: 374661
Change-Id: I0e6bc210679ef211c2850ffbe1dfc80da2f65bf0
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
This commit is contained in:
Ajay Dudani
2012-08-20 14:44:40 -07:00
committed by Iliyan Malchev
parent 77af5d3270
commit e8cbb4da04
5 changed files with 7 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-msm/board-8064.c
View File

@@ -2950,6 +2950,7 @@ static void __init apq8064_common_init(void)
ARRAY_SIZE(common_not_mpq_devices));
enable_ddr3_regulator();
if (machine_is_apq8064_mtp()) {
msm_hsic_pdata.log2_irq_thresh = 5,
apq8064_device_hsic_host.dev.platform_data = &msm_hsic_pdata;
device_initialize(&apq8064_device_hsic_host.dev);
}

3
drivers/usb/host/ehci-hcd.c
View File

@@ -691,8 +691,7 @@ static int ehci_init(struct usb_hcd *hcd)
hw->hw_alt_next = QTD_NEXT(ehci, ehci->async->dummy->qtd_dma);
/* clear interrupt enables, set irq latency */
if (ehci->max_log2_irq_thresh)
log2_irq_thresh = ehci->max_log2_irq_thresh;
log2_irq_thresh = ehci->log2_irq_thresh;
if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
log2_irq_thresh = 0;

5
drivers/usb/host/ehci-msm-hsic.c
View File

@@ -1516,13 +1516,15 @@ static int __devinit ehci_hsic_msm_probe(struct platform_device *pdev)
mehci = hcd_to_hsic(hcd);
mehci->dev = &pdev->dev;
pdata = mehci->dev->platform_data;
mehci->ehci.susp_sof_bug = 1;
mehci->ehci.reset_sof_bug = 1;
mehci->ehci.resume_sof_bug = 1;
mehci->ehci.max_log2_irq_thresh = 6;
if (pdata)
mehci->ehci.log2_irq_thresh = pdata->log2_irq_thresh;
res = platform_get_resource_byname(pdev,
IORESOURCE_IRQ,
@@ -1607,7 +1609,6 @@ static int __devinit ehci_hsic_msm_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "mode debugfs file is"
"not available\n");
pdata = mehci->dev->platform_data;
if (pdata && pdata->bus_scale_table) {
mehci->bus_perf_client =
msm_bus_scale_register_client(pdata->bus_scale_table);

2
drivers/usb/host/ehci.h
View File

@@ -135,7 +135,7 @@ struct ehci_hcd { /* one per controller */
ktime_t last_periodic_enable;
u32 command;
unsigned max_log2_irq_thresh;
unsigned log2_irq_thresh;
/* SILICON QUIRKS */
unsigned no_selective_suspend:1;

1
include/linux/usb/msm_hsusb.h
View File

@@ -379,6 +379,7 @@ struct msm_hsic_host_platform_data {
unsigned strobe;
unsigned data;
struct msm_bus_scale_pdata *bus_scale_table;
unsigned log2_irq_thresh;
};
struct msm_usb_host_platform_data {