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mako: EHCI: HSIC: Add support to vote for SVS digital voltage

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HSIC HW can operate at SVS digital voltage when it is active.
Currently HSIC is voting for 120Mhz SFAB and 64Mhz DFAB clock
frequencies. Clock frequencies are directly proportional to SVS
voltage. If DFAB is running at 64Mhz or SFAB is running at 120Mhz
or higher SVS is not possible even though HSIC votes for it. Hence
do not vote for SFAB clock frequency and only vote for 32Mhz for
DFAB in order to allow SVS to happen. Voting for SVS voltage reduces
current consumption by 3mA in HSDPA network.

Change-Id: Ic76f0c8346e3387b1647f41f77eb06babbd9a422
Signed-off-by: Iliyan Malchev <malchev@google.com>
This commit is contained in:
Devin Kim 2013-02-05 16:27:43 -08:00 committed by Iliyan Malchev
parent 509e10fd46
commit a515e61bdc
1 changed files with 1 additions and 13 deletions
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14
arch/arm/mach-msm/lge/mako/board-mako.c
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@ -738,12 +738,6 @@ static void __init apq8064_early_reserve(void)
#ifdef CONFIG_USB_EHCI_MSM_HSIC
/* Bandwidth requests (zero) if no vote placed */
static struct msm_bus_vectors hsic_init_vectors[] = {
{
.src = MSM_BUS_MASTER_SPS,
.dst = MSM_BUS_SLAVE_EBI_CH0,
.ab = 0,
.ib = 0,
},
{
.src = MSM_BUS_MASTER_SPS,
.dst = MSM_BUS_SLAVE_SPS,
@ -754,17 +748,11 @@ static struct msm_bus_vectors hsic_init_vectors[] = {
/* Bus bandwidth requests in Bytes/sec */
static struct msm_bus_vectors hsic_max_vectors[] = {
{
.src = MSM_BUS_MASTER_SPS,
.dst = MSM_BUS_SLAVE_EBI_CH0,
.ab = 60000000, /* At least 480Mbps on bus. */
.ib = 960000000, /* MAX bursts rate */
},
{
.src = MSM_BUS_MASTER_SPS,
.dst = MSM_BUS_SLAVE_SPS,
.ab = 0,
.ib = 512000000, /*vote for 64Mhz dfab clk rate*/
.ib = 256000000, /*vote for 32Mhz dfab clk rate*/
},
};