[PATCH v2 07/22] clk: at91: add pmc_data struct and helpers

Alexandre Belloni
2018-10-16T14:24:16Z

Add a new strut to handle references to all the PMC clocks and implement
allocation/free helpers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/clk/at91/pmc.c | 44 ++++++++++++++++++++++++++++++++++++++++++
drivers/clk/at91/pmc.h | 17 ++++++++++++++++
2 files changed, 61 insertions(+)

diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 1fa27f4ea538..0f8b3add1b04 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -47,6 +47,50 @@ int of_at91_get_clk_range(struct device_node *np, const char *propname,
}
EXPORT_SYMBOL_GPL(of_at91_get_clk_range);

+void pmc_data_free(struct pmc_data *pmc_data)
+{
+ kfree(pmc_data->chws);
+ kfree(pmc_data->shws);
+ kfree(pmc_data->phws);
+ kfree(pmc_data->ghws);
+}
+
+struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
+ unsigned int nperiph, unsigned int ngck)
+{
+ struct pmc_data *pmc_data = kzalloc(sizeof(*pmc_data), GFP_KERNEL);
+
+ if (!pmc_data)
+ return NULL;
+
+ pmc_data->ncore = ncore;
+ pmc_data->chws = kcalloc(ncore, sizeof(struct clk_hw *), GFP_KERNEL);
+ if (!pmc_data->chws)
+ goto err;
+
+ pmc_data->nsystem = nsystem;
+ pmc_data->shws = kcalloc(nsystem, sizeof(struct clk_hw *), GFP_KERNEL);
+ if (!pmc_data->shws)
+ goto err;
+
+ pmc_data->nperiph = nperiph;
+ pmc_data->phws = kcalloc(nperiph, sizeof(struct clk_hw *), GFP_KERNEL);
+ if (!pmc_data->phws)
+ goto err;
+
+ pmc_data->ngck = ngck;
+ pmc_data->ghws = kcalloc(ngck, sizeof(struct clk_hw *), GFP_KERNEL);
+ if (!pmc_data->ghws)
+ goto err;
+
+ return pmc_data;
+
+err:
+ pmc_data_free(pmc_data);
+
+ return NULL;
+}
+
#ifdef CONFIG_PM
static struct regmap *pmcreg;

diff --git a/drivers/clk/at91/pmc.h b/drivers/clk/at91/pmc.h
index 3dc50267a458..672a79bda88c 100644
--- a/drivers/clk/at91/pmc.h
+++ b/drivers/clk/at91/pmc.h
@@ -19,6 +19,17 @@

extern spinlock_t pmc_pcr_lock;

+struct pmc_data {
+ unsigned int ncore;
+ struct clk_hw **chws;
+ unsigned int nsystem;
+ struct clk_hw **shws;
+ unsigned int nperiph;
+ struct clk_hw **phws;
+ unsigned int ngck;
+ struct clk_hw **ghws;
+};
+
struct clk_range {
unsigned long min;
unsigned long max;
@@ -69,6 +80,12 @@ extern const struct clk_programmable_layout at91rm9200_programmable_layout;
extern const struct clk_programmable_layout at91sam9g45_programmable_layout;
extern const struct clk_programmable_layout at91sam9x5_programmable_layout;

+#define ndck(a, s) (a[s - 1].id + 1)
+#define nck(a) (a[ARRAY_SIZE(a) - 1].id + 1)
+struct pmc_data *pmc_data_allocate(unsigned int ncore, unsigned int nsystem,
+ unsigned int nperiph, unsigned int ngck);
+void pmc_data_free(struct pmc_data *pmc_data);
+
int of_at91_get_clk_range(struct device_node *np, const char *propname,
struct clk_range *range);

--
2.19.1