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clk: at91: add pmc_data struct and helpers 

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>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Alexandre Belloni 2018-10-16 16:21:45 +02:00 committed by Stephen Boyd
parent b2e39dc0bb
commit b00cd8e419
2 changed files with 61 additions and 0 deletions
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44
drivers/clk/at91/pmc.c
View File

@ -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;

17
drivers/clk/at91/pmc.h
View File

@ -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);