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

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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
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35
drivers/power/reset/brcmstb-reboot.c
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@ -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 = {