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bus: ti-sysc: Add support for using ti-sysc for MCAN on dra76x 

The dra76x MCAN generic interconnect module has a its own
format for the bits in the control registers.

Therefore add a new module type, new regbits and new capabilities
specific to the MCAN module.

Acked-by: Rob Herring <robh@kernel.org>
CC: Tony Lindgren <tony@atomide.com>
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Faiz Abbas 2018-07-09 22:18:38 +05:30 committed by Tony Lindgren
parent 91c17a7006
commit 7f35e63dbf
4 changed files with 22 additions and 0 deletions
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1
Documentation/devicetree/bindings/bus/ti-sysc.txt
View File

@ -36,6 +36,7 @@ Required standard properties:
"ti,sysc-omap-aes"
"ti,sysc-mcasp"
"ti,sysc-usb-host-fs"
"ti,sysc-dra7-mcan"
- reg shall have register areas implemented for the interconnect
target module in question such as revision, sysc and syss

18
drivers/bus/ti-sysc.c
View File

@ -1552,6 +1552,23 @@ static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
.regbits = &sysc_regbits_omap4_usb_host_fs,
};
static const struct sysc_regbits sysc_regbits_dra7_mcan = {
.dmadisable_shift = -ENODEV,
.midle_shift = -ENODEV,
.sidle_shift = -ENODEV,
.clkact_shift = -ENODEV,
.enwkup_shift = 4,
.srst_shift = 0,
.emufree_shift = -ENODEV,
.autoidle_shift = -ENODEV,
};
static const struct sysc_capabilities sysc_dra7_mcan = {
.type = TI_SYSC_DRA7_MCAN,
.sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
.regbits = &sysc_regbits_dra7_mcan,
};
static int sysc_init_pdata(struct sysc *ddata)
{
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
@ -1743,6 +1760,7 @@ static const struct of_device_id sysc_match[] = {
{ .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
{ .compatible = "ti,sysc-usb-host-fs",
.data = &sysc_omap4_usb_host_fs, },
{ .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
{ },
};
MODULE_DEVICE_TABLE(of, sysc_match);

2
include/dt-bindings/bus/ti-sysc.h
View File

@ -15,6 +15,8 @@
/* SmartReflex sysc found on 36xx and later */
#define SYSC_OMAP3_SR_ENAWAKEUP (1 << 26)
#define SYSC_DRA7_MCAN_ENAWAKEUP (1 << 4)
/* SYSCONFIG STANDBYMODE/MIDLEMODE/SIDLEMODE supported by hardware */
#define SYSC_IDLE_FORCE 0
#define SYSC_IDLE_NO 1

1
include/linux/platform_data/ti-sysc.h
View File

@ -14,6 +14,7 @@ enum ti_sysc_module_type {
TI_SYSC_OMAP4_SR,
TI_SYSC_OMAP4_MCASP,
TI_SYSC_OMAP4_USB_HOST_FS,
TI_SYSC_DRA7_MCAN,
};
struct ti_sysc_cookie {