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-rw-r--r--drivers/soc/tegra/pmc.c613
1 files changed, 508 insertions, 105 deletions
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index bc34cf7482fb..bb173456bbff 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -28,12 +28,16 @@
#include <linux/export.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/of_platform.h>
#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
#include <linux/reboot.h>
#include <linux/reset.h>
#include <linux/seq_file.h>
+#include <linux/slab.h>
#include <linux/spinlock.h>
#include <soc/tegra/common.h>
@@ -101,6 +105,16 @@
#define GPU_RG_CNTRL 0x2d4
+struct tegra_powergate {
+ struct generic_pm_domain genpd;
+ struct tegra_pmc *pmc;
+ unsigned int id;
+ struct clk **clks;
+ unsigned int num_clks;
+ struct reset_control **resets;
+ unsigned int num_resets;
+};
+
struct tegra_pmc_soc {
unsigned int num_powergates;
const char *const *powergates;
@@ -113,8 +127,11 @@ struct tegra_pmc_soc {
/**
* struct tegra_pmc - NVIDIA Tegra PMC
+ * @dev: pointer to PMC device structure
* @base: pointer to I/O remapped register region
* @clk: pointer to pclk clock
+ * @soc: pointer to SoC data structure
+ * @debugfs: pointer to debugfs entry
* @rate: currently configured rate of pclk
* @suspend_mode: lowest suspend mode available
* @cpu_good_time: CPU power good time (in microseconds)
@@ -128,12 +145,14 @@ struct tegra_pmc_soc {
* @cpu_pwr_good_en: CPU power good signal is enabled
* @lp0_vec_phys: physical base address of the LP0 warm boot code
* @lp0_vec_size: size of the LP0 warm boot code
+ * @powergates_available: Bitmap of available power gates
* @powergates_lock: mutex for power gate register access
*/
struct tegra_pmc {
struct device *dev;
void __iomem *base;
struct clk *clk;
+ struct dentry *debugfs;
const struct tegra_pmc_soc *soc;
@@ -151,6 +170,7 @@ struct tegra_pmc {
bool cpu_pwr_good_en;
u32 lp0_vec_phys;
u32 lp0_vec_size;
+ DECLARE_BITMAP(powergates_available, TEGRA_POWERGATE_MAX);
struct mutex powergates_lock;
};
@@ -160,6 +180,12 @@ static struct tegra_pmc *pmc = &(struct tegra_pmc) {
.suspend_mode = TEGRA_SUSPEND_NONE,
};
+static inline struct tegra_powergate *
+to_powergate(struct generic_pm_domain *domain)
+{
+ return container_of(domain, struct tegra_powergate, genpd);
+}
+
static u32 tegra_pmc_readl(unsigned long offset)
{
return readl(pmc->base + offset);
@@ -170,38 +196,287 @@ static void tegra_pmc_writel(u32 value, unsigned long offset)
writel(value, pmc->base + offset);
}
+static inline bool tegra_powergate_state(int id)
+{
+ if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
+ return (tegra_pmc_readl(GPU_RG_CNTRL) & 0x1) == 0;
+ else
+ return (tegra_pmc_readl(PWRGATE_STATUS) & BIT(id)) != 0;
+}
+
+static inline bool tegra_powergate_is_valid(int id)
+{
+ return (pmc->soc && pmc->soc->powergates[id]);
+}
+
+static inline bool tegra_powergate_is_available(int id)
+{
+ return test_bit(id, pmc->powergates_available);
+}
+
+static int tegra_powergate_lookup(struct tegra_pmc *pmc, const char *name)
+{
+ unsigned int i;
+
+ if (!pmc || !pmc->soc || !name)
+ return -EINVAL;
+
+ for (i = 0; i < pmc->soc->num_powergates; i++) {
+ if (!tegra_powergate_is_valid(i))
+ continue;
+
+ if (!strcmp(name, pmc->soc->powergates[i]))
+ return i;
+ }
+
+ dev_err(pmc->dev, "powergate %s not found\n", name);
+
+ return -ENODEV;
+}
+
/**
* tegra_powergate_set() - set the state of a partition
* @id: partition ID
* @new_state: new state of the partition
*/
-static int tegra_powergate_set(int id, bool new_state)
+static int tegra_powergate_set(unsigned int id, bool new_state)
{
bool status;
+ int err;
- mutex_lock(&pmc->powergates_lock);
+ if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
+ return -EINVAL;
- status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
+ mutex_lock(&pmc->powergates_lock);
- if (status == new_state) {
+ if (tegra_powergate_state(id) == new_state) {
mutex_unlock(&pmc->powergates_lock);
return 0;
}
tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
+ err = readx_poll_timeout(tegra_powergate_state, id, status,
+ status == new_state, 10, 100000);
+
+ mutex_unlock(&pmc->powergates_lock);
+
+ return err;
+}
+
+static int __tegra_powergate_remove_clamping(unsigned int id)
+{
+ u32 mask;
+
+ mutex_lock(&pmc->powergates_lock);
+
+ /*
+ * On Tegra124 and later, the clamps for the GPU are controlled by a
+ * separate register (with different semantics).
+ */
+ if (id == TEGRA_POWERGATE_3D) {
+ if (pmc->soc->has_gpu_clamps) {
+ tegra_pmc_writel(0, GPU_RG_CNTRL);
+ goto out;
+ }
+ }
+
+ /*
+ * Tegra 2 has a bug where PCIE and VDE clamping masks are
+ * swapped relatively to the partition ids
+ */
+ if (id == TEGRA_POWERGATE_VDEC)
+ mask = (1 << TEGRA_POWERGATE_PCIE);
+ else if (id == TEGRA_POWERGATE_PCIE)
+ mask = (1 << TEGRA_POWERGATE_VDEC);
+ else
+ mask = (1 << id);
+
+ tegra_pmc_writel(mask, REMOVE_CLAMPING);
+
+out:
mutex_unlock(&pmc->powergates_lock);
return 0;
}
+static void tegra_powergate_disable_clocks(struct tegra_powergate *pg)
+{
+ unsigned int i;
+
+ for (i = 0; i < pg->num_clks; i++)
+ clk_disable_unprepare(pg->clks[i]);
+}
+
+static int tegra_powergate_enable_clocks(struct tegra_powergate *pg)
+{
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < pg->num_clks; i++) {
+ err = clk_prepare_enable(pg->clks[i]);
+ if (err)
+ goto out;
+ }
+
+ return 0;
+
+out:
+ while (i--)
+ clk_disable_unprepare(pg->clks[i]);
+
+ return err;
+}
+
+static int tegra_powergate_reset_assert(struct tegra_powergate *pg)
+{
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < pg->num_resets; i++) {
+ err = reset_control_assert(pg->resets[i]);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int tegra_powergate_reset_deassert(struct tegra_powergate *pg)
+{
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < pg->num_resets; i++) {
+ err = reset_control_deassert(pg->resets[i]);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int tegra_powergate_power_up(struct tegra_powergate *pg,
+ bool disable_clocks)
+{
+ int err;
+
+ err = tegra_powergate_reset_assert(pg);
+ if (err)
+ return err;
+
+ usleep_range(10, 20);
+
+ err = tegra_powergate_set(pg->id, true);
+ if (err < 0)
+ return err;
+
+ usleep_range(10, 20);
+
+ err = tegra_powergate_enable_clocks(pg);
+ if (err)
+ goto disable_clks;
+
+ usleep_range(10, 20);
+
+ err = __tegra_powergate_remove_clamping(pg->id);
+ if (err)
+ goto disable_clks;
+
+ usleep_range(10, 20);
+
+ err = tegra_powergate_reset_deassert(pg);
+ if (err)
+ goto powergate_off;
+
+ usleep_range(10, 20);
+
+ if (disable_clocks)
+ tegra_powergate_disable_clocks(pg);
+
+ return 0;
+
+disable_clks:
+ tegra_powergate_disable_clocks(pg);
+ usleep_range(10, 20);
+powergate_off:
+ tegra_powergate_set(pg->id, false);
+
+ return err;
+}
+
+static int tegra_powergate_power_down(struct tegra_powergate *pg)
+{
+ int err;
+
+ err = tegra_powergate_enable_clocks(pg);
+ if (err)
+ return err;
+
+ usleep_range(10, 20);
+
+ err = tegra_powergate_reset_assert(pg);
+ if (err)
+ goto disable_clks;
+
+ usleep_range(10, 20);
+
+ tegra_powergate_disable_clocks(pg);
+
+ usleep_range(10, 20);
+
+ err = tegra_powergate_set(pg->id, false);
+ if (err)
+ goto assert_resets;
+
+ return 0;
+
+assert_resets:
+ tegra_powergate_enable_clocks(pg);
+ usleep_range(10, 20);
+ tegra_powergate_reset_deassert(pg);
+ usleep_range(10, 20);
+disable_clks:
+ tegra_powergate_disable_clocks(pg);
+
+ return err;
+}
+
+static int tegra_genpd_power_on(struct generic_pm_domain *domain)
+{
+ struct tegra_powergate *pg = to_powergate(domain);
+ struct tegra_pmc *pmc = pg->pmc;
+ int err;
+
+ err = tegra_powergate_power_up(pg, true);
+ if (err)
+ dev_err(pmc->dev, "failed to turn on PM domain %s: %d\n",
+ pg->genpd.name, err);
+
+ return err;
+}
+
+static int tegra_genpd_power_off(struct generic_pm_domain *domain)
+{
+ struct tegra_powergate *pg = to_powergate(domain);
+ struct tegra_pmc *pmc = pg->pmc;
+ int err;
+
+ err = tegra_powergate_power_down(pg);
+ if (err)
+ dev_err(pmc->dev, "failed to turn off PM domain %s: %d\n",
+ pg->genpd.name, err);
+
+ return err;
+}
+
/**
* tegra_powergate_power_on() - power on partition
* @id: partition ID
*/
-int tegra_powergate_power_on(int id)
+int tegra_powergate_power_on(unsigned int id)
{
- if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ if (!tegra_powergate_is_available(id))
return -EINVAL;
return tegra_powergate_set(id, true);
@@ -211,9 +486,9 @@ int tegra_powergate_power_on(int id)
* tegra_powergate_power_off() - power off partition
* @id: partition ID
*/
-int tegra_powergate_power_off(int id)
+int tegra_powergate_power_off(unsigned int id)
{
- if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ if (!tegra_powergate_is_available(id))
return -EINVAL;
return tegra_powergate_set(id, false);
@@ -224,53 +499,30 @@ EXPORT_SYMBOL(tegra_powergate_power_off);
* tegra_powergate_is_powered() - check if partition is powered
* @id: partition ID
*/
-int tegra_powergate_is_powered(int id)
+int tegra_powergate_is_powered(unsigned int id)
{
- u32 status;
+ int status;
- if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ if (!tegra_powergate_is_valid(id))
return -EINVAL;
- status = tegra_pmc_readl(PWRGATE_STATUS) & (1 << id);
- return !!status;
+ mutex_lock(&pmc->powergates_lock);
+ status = tegra_powergate_state(id);
+ mutex_unlock(&pmc->powergates_lock);
+
+ return status;
}
/**
* tegra_powergate_remove_clamping() - remove power clamps for partition
* @id: partition ID
*/
-int tegra_powergate_remove_clamping(int id)
+int tegra_powergate_remove_clamping(unsigned int id)
{
- u32 mask;
-
- if (!pmc->soc || id < 0 || id >= pmc->soc->num_powergates)
+ if (!tegra_powergate_is_available(id))
return -EINVAL;
- /*
- * On Tegra124 and later, the clamps for the GPU are controlled by a
- * separate register (with different semantics).
- */
- if (id == TEGRA_POWERGATE_3D) {
- if (pmc->soc->has_gpu_clamps) {
- tegra_pmc_writel(0, GPU_RG_CNTRL);
- return 0;
- }
- }
-
- /*
- * Tegra 2 has a bug where PCIE and VDE clamping masks are
- * swapped relatively to the partition ids
- */
- if (id == TEGRA_POWERGATE_VDEC)
- mask = (1 << TEGRA_POWERGATE_PCIE);
- else if (id == TEGRA_POWERGATE_PCIE)
- mask = (1 << TEGRA_POWERGATE_VDEC);
- else
- mask = (1 << id);
-
- tegra_pmc_writel(mask, REMOVE_CLAMPING);
-
- return 0;
+ return __tegra_powergate_remove_clamping(id);
}
EXPORT_SYMBOL(tegra_powergate_remove_clamping);
@@ -282,38 +534,23 @@ EXPORT_SYMBOL(tegra_powergate_remove_clamping);
*
* Must be called with clk disabled, and returns with clk enabled.
*/
-int tegra_powergate_sequence_power_up(int id, struct clk *clk,
+int tegra_powergate_sequence_power_up(unsigned int id, struct clk *clk,
struct reset_control *rst)
{
- int ret;
-
- reset_control_assert(rst);
-
- ret = tegra_powergate_power_on(id);
- if (ret)
- goto err_power;
-
- ret = clk_prepare_enable(clk);
- if (ret)
- goto err_clk;
-
- usleep_range(10, 20);
-
- ret = tegra_powergate_remove_clamping(id);
- if (ret)
- goto err_clamp;
+ struct tegra_powergate pg;
+ int err;
- usleep_range(10, 20);
- reset_control_deassert(rst);
+ pg.id = id;
+ pg.clks = &clk;
+ pg.num_clks = 1;
+ pg.resets = &rst;
+ pg.num_resets = 1;
- return 0;
+ err = tegra_powergate_power_up(&pg, false);
+ if (err)
+ pr_err("failed to turn on partition %d: %d\n", id, err);
-err_clamp:
- clk_disable_unprepare(clk);
-err_clk:
- tegra_powergate_power_off(id);
-err_power:
- return ret;
+ return err;
}
EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
@@ -325,9 +562,9 @@ EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
* Returns the partition ID corresponding to the CPU partition ID or a
* negative error code on failure.
*/
-static int tegra_get_cpu_powergate_id(int cpuid)
+static int tegra_get_cpu_powergate_id(unsigned int cpuid)
{
- if (pmc->soc && cpuid > 0 && cpuid < pmc->soc->num_cpu_powergates)
+ if (pmc->soc && cpuid < pmc->soc->num_cpu_powergates)
return pmc->soc->cpu_powergates[cpuid];
return -EINVAL;
@@ -337,7 +574,7 @@ static int tegra_get_cpu_powergate_id(int cpuid)
* tegra_pmc_cpu_is_powered() - check if CPU partition is powered
* @cpuid: CPU partition ID
*/
-bool tegra_pmc_cpu_is_powered(int cpuid)
+bool tegra_pmc_cpu_is_powered(unsigned int cpuid)
{
int id;
@@ -352,7 +589,7 @@ bool tegra_pmc_cpu_is_powered(int cpuid)
* tegra_pmc_cpu_power_on() - power on CPU partition
* @cpuid: CPU partition ID
*/
-int tegra_pmc_cpu_power_on(int cpuid)
+int tegra_pmc_cpu_power_on(unsigned int cpuid)
{
int id;
@@ -367,7 +604,7 @@ int tegra_pmc_cpu_power_on(int cpuid)
* tegra_pmc_cpu_remove_clamping() - remove power clamps for CPU partition
* @cpuid: CPU partition ID
*/
-int tegra_pmc_cpu_remove_clamping(int cpuid)
+int tegra_pmc_cpu_remove_clamping(unsigned int cpuid)
{
int id;
@@ -416,16 +653,18 @@ static struct notifier_block tegra_pmc_restart_handler = {
static int powergate_show(struct seq_file *s, void *data)
{
unsigned int i;
+ int status;
seq_printf(s, " powergate powered\n");
seq_printf(s, "------------------\n");
for (i = 0; i < pmc->soc->num_powergates; i++) {
- if (!pmc->soc->powergates[i])
+ status = tegra_powergate_is_powered(i);
+ if (status < 0)
continue;
seq_printf(s, " %9s %7s\n", pmc->soc->powergates[i],
- tegra_powergate_is_powered(i) ? "yes" : "no");
+ status ? "yes" : "no");
}
return 0;
@@ -445,17 +684,164 @@ static const struct file_operations powergate_fops = {
static int tegra_powergate_debugfs_init(void)
{
- struct dentry *d;
+ pmc->debugfs = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
+ &powergate_fops);
+ if (!pmc->debugfs)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int tegra_powergate_of_get_clks(struct tegra_powergate *pg,
+ struct device_node *np)
+{
+ struct clk *clk;
+ unsigned int i, count;
+ int err;
+
+ count = of_count_phandle_with_args(np, "clocks", "#clock-cells");
+ if (count == 0)
+ return -ENODEV;
+
+ pg->clks = kcalloc(count, sizeof(clk), GFP_KERNEL);
+ if (!pg->clks)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++) {
+ pg->clks[i] = of_clk_get(np, i);
+ if (IS_ERR(pg->clks[i])) {
+ err = PTR_ERR(pg->clks[i]);
+ goto err;
+ }
+ }
+
+ pg->num_clks = count;
+
+ return 0;
+
+err:
+ while (i--)
+ clk_put(pg->clks[i]);
+ kfree(pg->clks);
+
+ return err;
+}
+
+static int tegra_powergate_of_get_resets(struct tegra_powergate *pg,
+ struct device_node *np)
+{
+ struct reset_control *rst;
+ unsigned int i, count;
+ int err;
+
+ count = of_count_phandle_with_args(np, "resets", "#reset-cells");
+ if (count == 0)
+ return -ENODEV;
- d = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
- &powergate_fops);
- if (!d)
+ pg->resets = kcalloc(count, sizeof(rst), GFP_KERNEL);
+ if (!pg->resets)
return -ENOMEM;
+ for (i = 0; i < count; i++) {
+ pg->resets[i] = of_reset_control_get_by_index(np, i);
+ if (IS_ERR(pg->resets[i])) {
+ err = PTR_ERR(pg->resets[i]);
+ goto error;
+ }
+ }
+
+ pg->num_resets = count;
+
return 0;
+
+error:
+ while (i--)
+ reset_control_put(pg->resets[i]);
+ kfree(pg->resets);
+
+ return err;
+}
+
+static void tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np)
+{
+ struct tegra_powergate *pg;
+ bool off;
+ int id;
+
+ pg = kzalloc(sizeof(*pg), GFP_KERNEL);
+ if (!pg)
+ goto error;
+
+ id = tegra_powergate_lookup(pmc, np->name);
+ if (id < 0)
+ goto free_mem;
+
+ /*
+ * Clear the bit for this powergate so it cannot be managed
+ * directly via the legacy APIs for controlling powergates.
+ */
+ clear_bit(id, pmc->powergates_available);
+
+ pg->id = id;
+ pg->genpd.name = np->name;
+ pg->genpd.power_off = tegra_genpd_power_off;
+ pg->genpd.power_on = tegra_genpd_power_on;
+ pg->pmc = pmc;
+
+ if (tegra_powergate_of_get_clks(pg, np))
+ goto set_available;
+
+ if (tegra_powergate_of_get_resets(pg, np))
+ goto remove_clks;
+
+ off = !tegra_powergate_is_powered(pg->id);
+
+ pm_genpd_init(&pg->genpd, NULL, off);
+
+ if (of_genpd_add_provider_simple(np, &pg->genpd))
+ goto remove_resets;
+
+ dev_dbg(pmc->dev, "added power domain %s\n", pg->genpd.name);
+
+ return;
+
+remove_resets:
+ while (pg->num_resets--)
+ reset_control_put(pg->resets[pg->num_resets]);
+ kfree(pg->resets);
+
+remove_clks:
+ while (pg->num_clks--)
+ clk_put(pg->clks[pg->num_clks]);
+ kfree(pg->clks);
+
+set_available:
+ set_bit(id, pmc->powergates_available);
+
+free_mem:
+ kfree(pg);
+
+error:
+ dev_err(pmc->dev, "failed to create power domain for %s\n", np->name);
+}
+
+static void tegra_powergate_init(struct tegra_pmc *pmc)
+{
+ struct device_node *np, *child;
+
+ np = of_get_child_by_name(pmc->dev->of_node, "powergates");
+ if (!np)
+ return;
+
+ for_each_child_of_node(np, child) {
+ tegra_powergate_add(pmc, child);
+ of_node_put(child);
+ }
+
+ of_node_put(np);
}
-static int tegra_io_rail_prepare(int id, unsigned long *request,
+static int tegra_io_rail_prepare(unsigned int id, unsigned long *request,
unsigned long *status, unsigned int *bit)
{
unsigned long rate, value;
@@ -512,15 +898,17 @@ static void tegra_io_rail_unprepare(void)
tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
}
-int tegra_io_rail_power_on(int id)
+int tegra_io_rail_power_on(unsigned int id)
{
unsigned long request, status, value;
unsigned int bit, mask;
int err;
+ mutex_lock(&pmc->powergates_lock);
+
err = tegra_io_rail_prepare(id, &request, &status, &bit);
- if (err < 0)
- return err;
+ if (err)
+ goto error;
mask = 1 << bit;
@@ -531,27 +919,32 @@ int tegra_io_rail_power_on(int id)
tegra_pmc_writel(value, request);
err = tegra_io_rail_poll(status, mask, 0, 250);
- if (err < 0) {
+ if (err) {
pr_info("tegra_io_rail_poll() failed: %d\n", err);
- return err;
+ goto error;
}
tegra_io_rail_unprepare();
- return 0;
+error:
+ mutex_unlock(&pmc->powergates_lock);
+
+ return err;
}
EXPORT_SYMBOL(tegra_io_rail_power_on);
-int tegra_io_rail_power_off(int id)
+int tegra_io_rail_power_off(unsigned int id)
{
unsigned long request, status, value;
unsigned int bit, mask;
int err;
+ mutex_lock(&pmc->powergates_lock);
+
err = tegra_io_rail_prepare(id, &request, &status, &bit);
- if (err < 0) {
+ if (err) {
pr_info("tegra_io_rail_prepare() failed: %d\n", err);
- return err;
+ goto error;
}
mask = 1 << bit;
@@ -563,12 +956,15 @@ int tegra_io_rail_power_off(int id)
tegra_pmc_writel(value, request);
err = tegra_io_rail_poll(status, mask, mask, 250);
- if (err < 0)
- return err;
+ if (err)
+ goto error;
tegra_io_rail_unprepare();
- return 0;
+error:
+ mutex_unlock(&pmc->powergates_lock);
+
+ return err;
}
EXPORT_SYMBOL(tegra_io_rail_power_off);
@@ -727,7 +1123,7 @@ static void tegra_pmc_init(struct tegra_pmc *pmc)
tegra_pmc_writel(value, PMC_CNTRL);
}
-void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
+static void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
{
static const char disabled[] = "emergency thermal reset disabled";
u32 pmu_addr, ctrl_id, reg_addr, reg_data, pinmux;
@@ -805,7 +1201,7 @@ out:
static int tegra_pmc_probe(struct platform_device *pdev)
{
- void __iomem *base = pmc->base;
+ void __iomem *base;
struct resource *res;
int err;
@@ -815,11 +1211,9 @@ static int tegra_pmc_probe(struct platform_device *pdev)
/* take over the memory region from the early initialization */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pmc->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(pmc->base))
- return PTR_ERR(pmc->base);
-
- iounmap(base);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
pmc->clk = devm_clk_get(&pdev->dev, "pclk");
if (IS_ERR(pmc->clk)) {
@@ -842,11 +1236,19 @@ static int tegra_pmc_probe(struct platform_device *pdev)
err = register_restart_handler(&tegra_pmc_restart_handler);
if (err) {
+ debugfs_remove(pmc->debugfs);
dev_err(&pdev->dev, "unable to register restart handler, %d\n",
err);
return err;
}
+ tegra_powergate_init(pmc);
+
+ mutex_lock(&pmc->powergates_lock);
+ iounmap(pmc->base);
+ pmc->base = base;
+ mutex_unlock(&pmc->powergates_lock);
+
return 0;
}
@@ -964,7 +1366,6 @@ static const char * const tegra124_powergates[] = {
[TEGRA_POWERGATE_VENC] = "venc",
[TEGRA_POWERGATE_PCIE] = "pcie",
[TEGRA_POWERGATE_VDEC] = "vdec",
- [TEGRA_POWERGATE_L2] = "l2",
[TEGRA_POWERGATE_MPE] = "mpe",
[TEGRA_POWERGATE_HEG] = "heg",
[TEGRA_POWERGATE_SATA] = "sata",
@@ -1006,17 +1407,13 @@ static const char * const tegra210_powergates[] = {
[TEGRA_POWERGATE_3D] = "3d",
[TEGRA_POWERGATE_VENC] = "venc",
[TEGRA_POWERGATE_PCIE] = "pcie",
- [TEGRA_POWERGATE_L2] = "l2",
[TEGRA_POWERGATE_MPE] = "mpe",
- [TEGRA_POWERGATE_HEG] = "heg",
[TEGRA_POWERGATE_SATA] = "sata",
[TEGRA_POWERGATE_CPU1] = "cpu1",
[TEGRA_POWERGATE_CPU2] = "cpu2",
[TEGRA_POWERGATE_CPU3] = "cpu3",
- [TEGRA_POWERGATE_CELP] = "celp",
[TEGRA_POWERGATE_CPU0] = "cpu0",
[TEGRA_POWERGATE_C0NC] = "c0nc",
- [TEGRA_POWERGATE_C1NC] = "c1nc",
[TEGRA_POWERGATE_SOR] = "sor",
[TEGRA_POWERGATE_DIS] = "dis",
[TEGRA_POWERGATE_DISB] = "disb",
@@ -1080,6 +1477,7 @@ static int __init tegra_pmc_early_init(void)
const struct of_device_id *match;
struct device_node *np;
struct resource regs;
+ unsigned int i;
bool invert;
u32 value;
@@ -1129,6 +1527,11 @@ static int __init tegra_pmc_early_init(void)
return -ENXIO;
}
+ /* Create a bit-map of the available and valid partitions */
+ for (i = 0; i < pmc->soc->num_powergates; i++)
+ if (pmc->soc->powergates[i])
+ set_bit(i, pmc->powergates_available);
+
mutex_init(&pmc->powergates_lock);
/*
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