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

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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-omap-aes"
"ti,sysc-mcasp" "ti,sysc-mcasp"
"ti,sysc-usb-host-fs" "ti,sysc-usb-host-fs"
"ti,sysc-dra7-mcan"
- reg shall have register areas implemented for the interconnect - reg shall have register areas implemented for the interconnect
target module in question such as revision, sysc and syss 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, .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) static int sysc_init_pdata(struct sysc *ddata)
{ {
struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev); 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-mcasp", .data = &sysc_omap4_mcasp, },
{ .compatible = "ti,sysc-usb-host-fs", { .compatible = "ti,sysc-usb-host-fs",
.data = &sysc_omap4_usb_host_fs, }, .data = &sysc_omap4_usb_host_fs, },
{ .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
{ }, { },
}; };
MODULE_DEVICE_TABLE(of, sysc_match); 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 */ /* SmartReflex sysc found on 36xx and later */
#define SYSC_OMAP3_SR_ENAWAKEUP (1 << 26) #define SYSC_OMAP3_SR_ENAWAKEUP (1 << 26)
#define SYSC_DRA7_MCAN_ENAWAKEUP (1 << 4)
/* SYSCONFIG STANDBYMODE/MIDLEMODE/SIDLEMODE supported by hardware */ /* SYSCONFIG STANDBYMODE/MIDLEMODE/SIDLEMODE supported by hardware */
#define SYSC_IDLE_FORCE 0 #define SYSC_IDLE_FORCE 0
#define SYSC_IDLE_NO 1 #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_SR,
TI_SYSC_OMAP4_MCASP, TI_SYSC_OMAP4_MCASP,
TI_SYSC_OMAP4_USB_HOST_FS, TI_SYSC_OMAP4_USB_HOST_FS,
TI_SYSC_DRA7_MCAN,
}; };
struct ti_sysc_cookie { struct ti_sysc_cookie {