summaryrefslogtreecommitdiffstats
path: root/drivers/clk/at91/clk-slow.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/clk/at91/clk-slow.c')
-rw-r--r--drivers/clk/at91/clk-slow.c365
1 files changed, 0 insertions, 365 deletions
diff --git a/drivers/clk/at91/clk-slow.c b/drivers/clk/at91/clk-slow.c
index cd831e19ba72..560a8b9abf93 100644
--- a/drivers/clk/at91/clk-slow.c
+++ b/drivers/clk/at91/clk-slow.c
@@ -13,42 +13,11 @@
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/at91_pmc.h>
-#include <linux/delay.h>
#include <linux/of.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "pmc.h"
-#include "sckc.h"
-
-#define SLOW_CLOCK_FREQ 32768
-#define SLOWCK_SW_CYCLES 5
-#define SLOWCK_SW_TIME_USEC ((SLOWCK_SW_CYCLES * USEC_PER_SEC) / \
- SLOW_CLOCK_FREQ)
-
-#define AT91_SCKC_CR 0x00
-#define AT91_SCKC_RCEN (1 << 0)
-#define AT91_SCKC_OSC32EN (1 << 1)
-#define AT91_SCKC_OSC32BYP (1 << 2)
-#define AT91_SCKC_OSCSEL (1 << 3)
-
-struct clk_slow_osc {
- struct clk_hw hw;
- void __iomem *sckcr;
- unsigned long startup_usec;
-};
-
-#define to_clk_slow_osc(hw) container_of(hw, struct clk_slow_osc, hw)
-
-struct clk_slow_rc_osc {
- struct clk_hw hw;
- void __iomem *sckcr;
- unsigned long frequency;
- unsigned long accuracy;
- unsigned long startup_usec;
-};
-
-#define to_clk_slow_rc_osc(hw) container_of(hw, struct clk_slow_rc_osc, hw)
struct clk_sam9260_slow {
struct clk_hw hw;
@@ -57,340 +26,6 @@ struct clk_sam9260_slow {
#define to_clk_sam9260_slow(hw) container_of(hw, struct clk_sam9260_slow, hw)
-struct clk_sam9x5_slow {
- struct clk_hw hw;
- void __iomem *sckcr;
- u8 parent;
-};
-
-#define to_clk_sam9x5_slow(hw) container_of(hw, struct clk_sam9x5_slow, hw)
-
-static int clk_slow_osc_prepare(struct clk_hw *hw)
-{
- struct clk_slow_osc *osc = to_clk_slow_osc(hw);
- void __iomem *sckcr = osc->sckcr;
- u32 tmp = readl(sckcr);
-
- if (tmp & AT91_SCKC_OSC32BYP)
- return 0;
-
- writel(tmp | AT91_SCKC_OSC32EN, sckcr);
-
- usleep_range(osc->startup_usec, osc->startup_usec + 1);
-
- return 0;
-}
-
-static void clk_slow_osc_unprepare(struct clk_hw *hw)
-{
- struct clk_slow_osc *osc = to_clk_slow_osc(hw);
- void __iomem *sckcr = osc->sckcr;
- u32 tmp = readl(sckcr);
-
- if (tmp & AT91_SCKC_OSC32BYP)
- return;
-
- writel(tmp & ~AT91_SCKC_OSC32EN, sckcr);
-}
-
-static int clk_slow_osc_is_prepared(struct clk_hw *hw)
-{
- struct clk_slow_osc *osc = to_clk_slow_osc(hw);
- void __iomem *sckcr = osc->sckcr;
- u32 tmp = readl(sckcr);
-
- if (tmp & AT91_SCKC_OSC32BYP)
- return 1;
-
- return !!(tmp & AT91_SCKC_OSC32EN);
-}
-
-static const struct clk_ops slow_osc_ops = {
- .prepare = clk_slow_osc_prepare,
- .unprepare = clk_slow_osc_unprepare,
- .is_prepared = clk_slow_osc_is_prepared,
-};
-
-static struct clk_hw * __init
-at91_clk_register_slow_osc(void __iomem *sckcr,
- const char *name,
- const char *parent_name,
- unsigned long startup,
- bool bypass)
-{
- struct clk_slow_osc *osc;
- struct clk_hw *hw;
- struct clk_init_data init;
- int ret;
-
- if (!sckcr || !name || !parent_name)
- return ERR_PTR(-EINVAL);
-
- osc = kzalloc(sizeof(*osc), GFP_KERNEL);
- if (!osc)
- return ERR_PTR(-ENOMEM);
-
- init.name = name;
- init.ops = &slow_osc_ops;
- init.parent_names = &parent_name;
- init.num_parents = 1;
- init.flags = CLK_IGNORE_UNUSED;
-
- osc->hw.init = &init;
- osc->sckcr = sckcr;
- osc->startup_usec = startup;
-
- if (bypass)
- writel((readl(sckcr) & ~AT91_SCKC_OSC32EN) | AT91_SCKC_OSC32BYP,
- sckcr);
-
- hw = &osc->hw;
- ret = clk_hw_register(NULL, &osc->hw);
- if (ret) {
- kfree(osc);
- hw = ERR_PTR(ret);
- }
-
- return hw;
-}
-
-void __init of_at91sam9x5_clk_slow_osc_setup(struct device_node *np,
- void __iomem *sckcr)
-{
- struct clk_hw *hw;
- const char *parent_name;
- const char *name = np->name;
- u32 startup;
- bool bypass;
-
- parent_name = of_clk_get_parent_name(np, 0);
- of_property_read_string(np, "clock-output-names", &name);
- of_property_read_u32(np, "atmel,startup-time-usec", &startup);
- bypass = of_property_read_bool(np, "atmel,osc-bypass");
-
- hw = at91_clk_register_slow_osc(sckcr, name, parent_name, startup,
- bypass);
- if (IS_ERR(hw))
- return;
-
- of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
-}
-
-static unsigned long clk_slow_rc_osc_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw);
-
- return osc->frequency;
-}
-
-static unsigned long clk_slow_rc_osc_recalc_accuracy(struct clk_hw *hw,
- unsigned long parent_acc)
-{
- struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw);
-
- return osc->accuracy;
-}
-
-static int clk_slow_rc_osc_prepare(struct clk_hw *hw)
-{
- struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw);
- void __iomem *sckcr = osc->sckcr;
-
- writel(readl(sckcr) | AT91_SCKC_RCEN, sckcr);
-
- usleep_range(osc->startup_usec, osc->startup_usec + 1);
-
- return 0;
-}
-
-static void clk_slow_rc_osc_unprepare(struct clk_hw *hw)
-{
- struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw);
- void __iomem *sckcr = osc->sckcr;
-
- writel(readl(sckcr) & ~AT91_SCKC_RCEN, sckcr);
-}
-
-static int clk_slow_rc_osc_is_prepared(struct clk_hw *hw)
-{
- struct clk_slow_rc_osc *osc = to_clk_slow_rc_osc(hw);
-
- return !!(readl(osc->sckcr) & AT91_SCKC_RCEN);
-}
-
-static const struct clk_ops slow_rc_osc_ops = {
- .prepare = clk_slow_rc_osc_prepare,
- .unprepare = clk_slow_rc_osc_unprepare,
- .is_prepared = clk_slow_rc_osc_is_prepared,
- .recalc_rate = clk_slow_rc_osc_recalc_rate,
- .recalc_accuracy = clk_slow_rc_osc_recalc_accuracy,
-};
-
-static struct clk_hw * __init
-at91_clk_register_slow_rc_osc(void __iomem *sckcr,
- const char *name,
- unsigned long frequency,
- unsigned long accuracy,
- unsigned long startup)
-{
- struct clk_slow_rc_osc *osc;
- struct clk_hw *hw;
- struct clk_init_data init;
- int ret;
-
- if (!sckcr || !name)
- return ERR_PTR(-EINVAL);
-
- osc = kzalloc(sizeof(*osc), GFP_KERNEL);
- if (!osc)
- return ERR_PTR(-ENOMEM);
-
- init.name = name;
- init.ops = &slow_rc_osc_ops;
- init.parent_names = NULL;
- init.num_parents = 0;
- init.flags = CLK_IGNORE_UNUSED;
-
- osc->hw.init = &init;
- osc->sckcr = sckcr;
- osc->frequency = frequency;
- osc->accuracy = accuracy;
- osc->startup_usec = startup;
-
- hw = &osc->hw;
- ret = clk_hw_register(NULL, &osc->hw);
- if (ret) {
- kfree(osc);
- hw = ERR_PTR(ret);
- }
-
- return hw;
-}
-
-void __init of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np,
- void __iomem *sckcr)
-{
- struct clk_hw *hw;
- u32 frequency = 0;
- u32 accuracy = 0;
- u32 startup = 0;
- const char *name = np->name;
-
- of_property_read_string(np, "clock-output-names", &name);
- of_property_read_u32(np, "clock-frequency", &frequency);
- of_property_read_u32(np, "clock-accuracy", &accuracy);
- of_property_read_u32(np, "atmel,startup-time-usec", &startup);
-
- hw = at91_clk_register_slow_rc_osc(sckcr, name, frequency, accuracy,
- startup);
- if (IS_ERR(hw))
- return;
-
- of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
-}
-
-static int clk_sam9x5_slow_set_parent(struct clk_hw *hw, u8 index)
-{
- struct clk_sam9x5_slow *slowck = to_clk_sam9x5_slow(hw);
- void __iomem *sckcr = slowck->sckcr;
- u32 tmp;
-
- if (index > 1)
- return -EINVAL;
-
- tmp = readl(sckcr);
-
- if ((!index && !(tmp & AT91_SCKC_OSCSEL)) ||
- (index && (tmp & AT91_SCKC_OSCSEL)))
- return 0;
-
- if (index)
- tmp |= AT91_SCKC_OSCSEL;
- else
- tmp &= ~AT91_SCKC_OSCSEL;
-
- writel(tmp, sckcr);
-
- usleep_range(SLOWCK_SW_TIME_USEC, SLOWCK_SW_TIME_USEC + 1);
-
- return 0;
-}
-
-static u8 clk_sam9x5_slow_get_parent(struct clk_hw *hw)
-{
- struct clk_sam9x5_slow *slowck = to_clk_sam9x5_slow(hw);
-
- return !!(readl(slowck->sckcr) & AT91_SCKC_OSCSEL);
-}
-
-static const struct clk_ops sam9x5_slow_ops = {
- .set_parent = clk_sam9x5_slow_set_parent,
- .get_parent = clk_sam9x5_slow_get_parent,
-};
-
-static struct clk_hw * __init
-at91_clk_register_sam9x5_slow(void __iomem *sckcr,
- const char *name,
- const char **parent_names,
- int num_parents)
-{
- struct clk_sam9x5_slow *slowck;
- struct clk_hw *hw;
- struct clk_init_data init;
- int ret;
-
- if (!sckcr || !name || !parent_names || !num_parents)
- return ERR_PTR(-EINVAL);
-
- slowck = kzalloc(sizeof(*slowck), GFP_KERNEL);
- if (!slowck)
- return ERR_PTR(-ENOMEM);
-
- init.name = name;
- init.ops = &sam9x5_slow_ops;
- init.parent_names = parent_names;
- init.num_parents = num_parents;
- init.flags = 0;
-
- slowck->hw.init = &init;
- slowck->sckcr = sckcr;
- slowck->parent = !!(readl(sckcr) & AT91_SCKC_OSCSEL);
-
- hw = &slowck->hw;
- ret = clk_hw_register(NULL, &slowck->hw);
- if (ret) {
- kfree(slowck);
- hw = ERR_PTR(ret);
- }
-
- return hw;
-}
-
-void __init of_at91sam9x5_clk_slow_setup(struct device_node *np,
- void __iomem *sckcr)
-{
- struct clk_hw *hw;
- const char *parent_names[2];
- unsigned int num_parents;
- const char *name = np->name;
-
- num_parents = of_clk_get_parent_count(np);
- if (num_parents == 0 || num_parents > 2)
- return;
-
- of_clk_parent_fill(np, parent_names, num_parents);
-
- of_property_read_string(np, "clock-output-names", &name);
-
- hw = at91_clk_register_sam9x5_slow(sckcr, name, parent_names,
- num_parents);
- if (IS_ERR(hw))
- return;
-
- of_clk_add_hw_provider(np, of_clk_hw_simple_get, hw);
-}
-
static u8 clk_sam9260_slow_get_parent(struct clk_hw *hw)
{
struct clk_sam9260_slow *slowck = to_clk_sam9260_slow(hw);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 05:37:20 +0000