Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-27 06:31:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

power/reset: brcmstb: Use the DT "compatible" string to indicate bit positions

Browse Source 
Some of the older chips used different bits to arm and trigger the reset.
Add the infrastructure needed to specify this through the "compatible"
string.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Kevin Cernekee 2014-11-25 16:49:47 -08:00 committed by Sebastian Reichel
parent 4f5fd64046
commit bb1de7f61f
1 changed files with 28 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/power/reset/brcmstb-reboot.c
View File

@ -11,6 +11,7 @@
* GNU General Public License for more details.
*/
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/init.h>
@ -34,13 +35,20 @@ static struct regmap *regmap;
static u32 rst_src_en;
static u32 sw_mstr_rst;
struct reset_reg_mask {
u32 rst_src_en_mask;
u32 sw_mstr_rst_mask;
};
static const struct reset_reg_mask *reset_masks;
static int brcmstb_restart_handler(struct notifier_block *this,
unsigned long mode, void *cmd)
{
int rc;
u32 tmp;
rc = regmap_write(regmap, rst_src_en, 1);
rc = regmap_write(regmap, rst_src_en, reset_masks->rst_src_en_mask);
if (rc) {
pr_err("failed to write rst_src_en (%d)\n", rc);
return NOTIFY_DONE;
@ -52,7 +60,7 @@ static int brcmstb_restart_handler(struct notifier_block *this,
return NOTIFY_DONE;
}
rc = regmap_write(regmap, sw_mstr_rst, 1);
rc = regmap_write(regmap, sw_mstr_rst, reset_masks->sw_mstr_rst_mask);
if (rc) {
pr_err("failed to write sw_mstr_rst (%d)\n", rc);
return NOTIFY_DONE;
@ -75,10 +83,28 @@ static struct notifier_block brcmstb_restart_nb = {
.priority = 128,
};
static const struct reset_reg_mask reset_bits_40nm = {
.rst_src_en_mask = BIT(0),
.sw_mstr_rst_mask = BIT(0),
};
static const struct of_device_id of_match[] = {
{ .compatible = "brcm,brcmstb-reboot", .data = &reset_bits_40nm },
{},
};
static int brcmstb_reboot_probe(struct platform_device *pdev)
{
int rc;
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *of_id;
of_id = of_match_node(of_match, np);
if (!of_id) {
pr_err("failed to look up compatible string\n");
return -EINVAL;
}
reset_masks = of_id->data;
regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
if (IS_ERR(regmap)) {
@ -108,11 +134,6 @@ static int brcmstb_reboot_probe(struct platform_device *pdev)
return rc;
}
static const struct of_device_id of_match[] = {
{ .compatible = "brcm,brcmstb-reboot", },
{},
};
static struct platform_driver brcmstb_reboot_driver = {
.probe = brcmstb_reboot_probe,
.driver = {