Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-28 15:11:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

clk: mvebu: armada 370/XP add clock gating control provider for DT

Browse Source 
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Gregory CLEMENT 2012-11-17 15:22:29 +01:00 committed by Thomas Petazzoni
parent f97d0d7aa8
commit c4c34d6084
2 changed files with 116 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
Documentation/devicetree/bindings/clock/mvebu-gated-clock.txt
View File

@ -6,6 +6,49 @@ the clock ID in its "clocks" phandle cell. The clock ID is directly mapped to
the corresponding clock gating control bit in HW to ease manual clock lookup
in datasheet.
The following is a list of provided IDs for Armada 370:
ID Clock Peripheral
-----------------------------------
0 Audio AC97 Cntrl
1 pex0_en PCIe 0 Clock out
2 pex1_en PCIe 1 Clock out
3 ge1 Gigabit Ethernet 1
4 ge0 Gigabit Ethernet 0
5 pex0 PCIe Cntrl 0
9 pex1 PCIe Cntrl 1
15 sata0 SATA Host 0
17 sdio SDHCI Host
25 tdm Time Division Mplx
28 ddr DDR Cntrl
30 sata1 SATA Host 0
The following is a list of provided IDs for Armada XP:
ID Clock Peripheral
-----------------------------------
0 audio Audio Cntrl
1 ge3 Gigabit Ethernet 3
2 ge2 Gigabit Ethernet 2
3 ge1 Gigabit Ethernet 1
4 ge0 Gigabit Ethernet 0
5 pex0 PCIe Cntrl 0
6 pex1 PCIe Cntrl 1
7 pex2 PCIe Cntrl 2
8 pex3 PCIe Cntrl 3
13 bp
14 sata0lnk
15 sata0 SATA Host 0
16 lcd LCD Cntrl
17 sdio SDHCI Host
18 usb0 USB Host 0
19 usb1 USB Host 1
20 usb2 USB Host 2
22 xor0 XOR DMA 0
23 crypto CESA engine
25 tdm Time Division Mplx
28 xor1 XOR DMA 1
29 sata1lnk
30 sata1 SATA Host 0
The following is a list of provided IDs for Dove:
ID Clock Peripheral
-----------------------------------

74
drivers/clk/mvebu/clk-gating-ctrl.c
View File

@ -88,10 +88,21 @@ static void __init mvebu_clk_gating_setup(
}
for (n = 0; n < ctrl->num_gates; n++) {
u8 flags = 0;
const char *parent =
(descr[n].parent) ? descr[n].parent : default_parent;
/*
* On Armada 370, the DDR clock is a special case: it
* isn't taken by any driver, but should anyway be
* kept enabled, so we mark it as IGNORE_UNUSED for
* now.
*/
if (!strcmp(descr[n].name, "ddr"))
flags |= CLK_IGNORE_UNUSED;
ctrl->gates[n] = clk_register_gate(NULL, descr[n].name, parent,
0, base, descr[n].bit_idx, 0, &ctrl->lock);
flags, base, descr[n].bit_idx, 0, &ctrl->lock);
WARN_ON(IS_ERR(ctrl->gates[n]));
}
of_clk_add_provider(np, mvebu_clk_gating_get_src, ctrl);
@ -101,6 +112,53 @@ static void __init mvebu_clk_gating_setup(
* SoC specific clock gating control
*/
#ifdef CONFIG_MACH_ARMADA_370
static const struct mvebu_soc_descr __initconst armada_370_gating_descr[] = {
{ "audio", NULL, 0 },
{ "pex0_en", NULL, 1 },
{ "pex1_en", NULL, 2 },
{ "ge1", NULL, 3 },
{ "ge0", NULL, 4 },
{ "pex0", NULL, 5 },
{ "pex1", NULL, 9 },
{ "sata0", NULL, 15 },
{ "sdio", NULL, 17 },
{ "tdm", NULL, 25 },
{ "ddr", NULL, 28 },
{ "sata1", NULL, 30 },
{ }
};
#endif
#ifdef CONFIG_MACH_ARMADA_XP
static const struct mvebu_soc_descr __initconst armada_xp_gating_descr[] = {
{ "audio", NULL, 0 },
{ "ge3", NULL, 1 },
{ "ge2", NULL, 2 },
{ "ge1", NULL, 3 },
{ "ge0", NULL, 4 },
{ "pex0", NULL, 5 },
{ "pex1", NULL, 6 },
{ "pex2", NULL, 7 },
{ "pex3", NULL, 8 },
{ "bp", NULL, 13 },
{ "sata0lnk", NULL, 14 },
{ "sata0", "sata0lnk", 15 },
{ "lcd", NULL, 16 },
{ "sdio", NULL, 17 },
{ "usb0", NULL, 18 },
{ "usb1", NULL, 19 },
{ "usb2", NULL, 20 },
{ "xor0", NULL, 22 },
{ "crypto", NULL, 23 },
{ "tdm", NULL, 25 },
{ "xor1", NULL, 28 },
{ "sata1lnk", NULL, 29 },
{ "sata1", "sata1lnk", 30 },
{ }
};
#endif
#ifdef CONFIG_ARCH_DOVE
static const struct mvebu_soc_descr __initconst dove_gating_descr[] = {
{ "usb0", NULL, 0 },
@ -147,6 +205,20 @@ static const struct mvebu_soc_descr __initconst kirkwood_gating_descr[] = {
#endif
static const __initdata struct of_device_id clk_gating_match[] = {
#ifdef CONFIG_MACH_ARMADA_370
{
.compatible = "marvell,armada-370-gating-clock",
.data = armada_370_gating_descr,
},
#endif
#ifdef CONFIG_MACH_ARMADA_XP
{
.compatible = "marvell,armada-xp-gating-clock",
.data = armada_xp_gating_descr,
},
#endif
#ifdef CONFIG_ARCH_DOVE
{
.compatible = "marvell,dove-gating-clock",