Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-27 14:41:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

soc: rockchip: power-domain: support qos save and restore

Browse Source 
support qos save and restore when power domain on/off.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
Elaine Zhang 2016-04-14 14:20:20 +08:00 committed by Heiko Stuebner
parent 71daabca34
commit 074c6a422d
1 changed files with 102 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

105
drivers/soc/rockchip/pm_domains.c
View File

@ -46,10 +46,20 @@ struct rockchip_pmu_info {
const struct rockchip_domain_info *domain_info;
};
#define MAX_QOS_REGS_NUM 5
#define QOS_PRIORITY 0x08
#define QOS_MODE 0x0c
#define QOS_BANDWIDTH 0x10
#define QOS_SATURATION 0x14
#define QOS_EXTCONTROL 0x18
struct rockchip_pm_domain {
struct generic_pm_domain genpd;
const struct rockchip_domain_info *info;
struct rockchip_pmu *pmu;
int num_qos;
struct regmap **qos_regmap;
u32 *qos_save_regs[MAX_QOS_REGS_NUM];
int num_clks;
struct clk *clks[];
};
@ -118,6 +128,55 @@ static int rockchip_pmu_set_idle_request(struct rockchip_pm_domain *pd,
return 0;
}
static int rockchip_pmu_save_qos(struct rockchip_pm_domain *pd)
{
int i;
for (i = 0; i < pd->num_qos; i++) {
regmap_read(pd->qos_regmap[i],
QOS_PRIORITY,
&pd->qos_save_regs[0][i]);
regmap_read(pd->qos_regmap[i],
QOS_MODE,
&pd->qos_save_regs[1][i]);
regmap_read(pd->qos_regmap[i],
QOS_BANDWIDTH,
&pd->qos_save_regs[2][i]);
regmap_read(pd->qos_regmap[i],
QOS_SATURATION,
&pd->qos_save_regs[3][i]);
regmap_read(pd->qos_regmap[i],
QOS_EXTCONTROL,
&pd->qos_save_regs[4][i]);
}
return 0;
}
static int rockchip_pmu_restore_qos(struct rockchip_pm_domain *pd)
{
int i;
for (i = 0; i < pd->num_qos; i++) {
regmap_write(pd->qos_regmap[i],
QOS_PRIORITY,
pd->qos_save_regs[0][i]);
regmap_write(pd->qos_regmap[i],
QOS_MODE,
pd->qos_save_regs[1][i]);
regmap_write(pd->qos_regmap[i],
QOS_BANDWIDTH,
pd->qos_save_regs[2][i]);
regmap_write(pd->qos_regmap[i],
QOS_SATURATION,
pd->qos_save_regs[3][i]);
regmap_write(pd->qos_regmap[i],
QOS_EXTCONTROL,
pd->qos_save_regs[4][i]);
}
return 0;
}
static bool rockchip_pmu_domain_is_on(struct rockchip_pm_domain *pd)
{
struct rockchip_pmu *pmu = pd->pmu;
@ -161,7 +220,7 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
clk_enable(pd->clks[i]);
if (!power_on) {
/* FIXME: add code to save AXI_QOS */
rockchip_pmu_save_qos(pd);
/* if powering down, idle request to NIU first */
rockchip_pmu_set_idle_request(pd, true);
@ -173,7 +232,7 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
/* if powering up, leave idle mode */
rockchip_pmu_set_idle_request(pd, false);
/* FIXME: add code to restore AXI_QOS */
rockchip_pmu_restore_qos(pd);
}
for (i = pd->num_clks - 1; i >= 0; i--)
@ -241,9 +300,10 @@ static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
{
const struct rockchip_domain_info *pd_info;
struct rockchip_pm_domain *pd;
struct device_node *qos_node;
struct clk *clk;
int clk_cnt;
int i;
int i, j;
u32 id;
int error;
@ -303,6 +363,45 @@ static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
clk, node->name);
}
pd->num_qos = of_count_phandle_with_args(node, "pm_qos",
NULL);
if (pd->num_qos > 0) {
pd->qos_regmap = devm_kcalloc(pmu->dev, pd->num_qos,
sizeof(*pd->qos_regmap),
GFP_KERNEL);
if (!pd->qos_regmap) {
error = -ENOMEM;
goto err_out;
}
for (j = 0; j < MAX_QOS_REGS_NUM; j++) {
pd->qos_save_regs[j] = devm_kcalloc(pmu->dev,
pd->num_qos,
sizeof(u32),
GFP_KERNEL);
if (!pd->qos_save_regs[j]) {
error = -ENOMEM;
goto err_out;
}
}
for (j = 0; j < pd->num_qos; j++) {
qos_node = of_parse_phandle(node, "pm_qos", j);
if (!qos_node) {
error = -ENODEV;
goto err_out;
}
pd->qos_regmap[j] = syscon_node_to_regmap(qos_node);
if (IS_ERR(pd->qos_regmap[j])) {
error = -ENODEV;
of_node_put(qos_node);
goto err_out;
}
of_node_put(qos_node);
}
}
error = rockchip_pd_power(pd, true);
if (error) {
dev_err(pmu->dev,