[PATCH v2 2/2] rockchip: power-domain: support qos save and restore

Elaine Zhang
2016-04-14T02:11:19Z

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

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
drivers/soc/rockchip/pm_domains.c | 104 ++++++++++++++++++++++++++++++++++++--
1 file changed, 101 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index ac729fe42cc9..58218143da54 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -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 +363,44 @@ 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) {
+ dev_err(pmu->dev,
+ "the qos node num is error qos_num = %d\n",
+ pd->num_qos);
+ error = pd->num_qos;
+ goto err_out;
+ }
+
+ pd->qos_regmap = devm_kcalloc(pmu->dev, pd->num_qos,
+ sizeof(*pd->qos_regmap), GFP_KERNEL);
+ if (!pd->qos_regmap)
+ return -ENOMEM;
+
+ 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])
+ return -ENOMEM;
+ }
+
+ 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,
--
1.9.1