mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
clk: at91: sckc: add support to specify registers bit offsets
Different IPs uses different bit offsets in registers for the same functionality, thus adapt the driver to support this. Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Claudiu Beznea
Stephen Boyd
parent
5cf6d876a7
commit
abaceffc88
@ -23,14 +23,18 @@
|
||||
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_bits {
|
||||
u32 cr_rcen;
|
||||
u32 cr_osc32en;
|
||||
u32 cr_osc32byp;
|
||||
u32 cr_oscsel;
|
||||
};
|
||||
|
||||
struct clk_slow_osc {
|
||||
struct clk_hw hw;
|
||||
void __iomem *sckcr;
|
||||
const struct clk_slow_bits *bits;
|
||||
unsigned long startup_usec;
|
||||
};
|
||||
|
||||
@ -39,6 +43,7 @@ struct clk_slow_osc {
|
||||
struct clk_sama5d4_slow_osc {
|
||||
struct clk_hw hw;
|
||||
void __iomem *sckcr;
|
||||
const struct clk_slow_bits *bits;
|
||||
unsigned long startup_usec;
|
||||
bool prepared;
|
||||
};
|
||||
@ -48,6 +53,7 @@ struct clk_sama5d4_slow_osc {
|
||||
struct clk_slow_rc_osc {
|
||||
struct clk_hw hw;
|
||||
void __iomem *sckcr;
|
||||
const struct clk_slow_bits *bits;
|
||||
unsigned long frequency;
|
||||
unsigned long accuracy;
|
||||
unsigned long startup_usec;
|
||||
@ -58,6 +64,7 @@ struct clk_slow_rc_osc {
|
||||
struct clk_sam9x5_slow {
|
||||
struct clk_hw hw;
|
||||
void __iomem *sckcr;
|
||||
const struct clk_slow_bits *bits;
|
||||
u8 parent;
|
||||
};
|
||||
|
||||
@ -69,10 +76,10 @@ static int clk_slow_osc_prepare(struct clk_hw *hw)
|
||||
void __iomem *sckcr = osc->sckcr;
|
||||
u32 tmp = readl(sckcr);
|
||||
|
||||
if (tmp & (AT91_SCKC_OSC32BYP | AT91_SCKC_OSC32EN))
|
||||
if (tmp & (osc->bits->cr_osc32byp | osc->bits->cr_osc32en))
|
||||
return 0;
|
||||
|
||||
writel(tmp | AT91_SCKC_OSC32EN, sckcr);
|
||||
writel(tmp | osc->bits->cr_osc32en, sckcr);
|
||||
|
||||
usleep_range(osc->startup_usec, osc->startup_usec + 1);
|
||||
|
||||
@ -85,10 +92,10 @@ static void clk_slow_osc_unprepare(struct clk_hw *hw)
|
||||
void __iomem *sckcr = osc->sckcr;
|
||||
u32 tmp = readl(sckcr);
|
||||
|
||||
if (tmp & AT91_SCKC_OSC32BYP)
|
||||
if (tmp & osc->bits->cr_osc32byp)
|
||||
return;
|
||||
|
||||
writel(tmp & ~AT91_SCKC_OSC32EN, sckcr);
|
||||
writel(tmp & ~osc->bits->cr_osc32en, sckcr);
|
||||
}
|
||||
|
||||
static int clk_slow_osc_is_prepared(struct clk_hw *hw)
|
||||
@ -97,10 +104,10 @@ static int clk_slow_osc_is_prepared(struct clk_hw *hw)
|
||||
void __iomem *sckcr = osc->sckcr;
|
||||
u32 tmp = readl(sckcr);
|
||||
|
||||
if (tmp & AT91_SCKC_OSC32BYP)
|
||||
if (tmp & osc->bits->cr_osc32byp)
|
||||
return 1;
|
||||
|
||||
return !!(tmp & AT91_SCKC_OSC32EN);
|
||||
return !!(tmp & osc->bits->cr_osc32en);
|
||||
}
|
||||
|
||||
static const struct clk_ops slow_osc_ops = {
|
||||
@ -114,7 +121,8 @@ at91_clk_register_slow_osc(void __iomem *sckcr,
|
||||
const char *name,
|
||||
const char *parent_name,
|
||||
unsigned long startup,
|
||||
bool bypass)
|
||||
bool bypass,
|
||||
const struct clk_slow_bits *bits)
|
||||
{
|
||||
struct clk_slow_osc *osc;
|
||||
struct clk_hw *hw;
|
||||
@ -137,10 +145,11 @@ at91_clk_register_slow_osc(void __iomem *sckcr,
|
||||
osc->hw.init = &init;
|
||||
osc->sckcr = sckcr;
|
||||
osc->startup_usec = startup;
|
||||
osc->bits = bits;
|
||||
|
||||
if (bypass)
|
||||
writel((readl(sckcr) & ~AT91_SCKC_OSC32EN) | AT91_SCKC_OSC32BYP,
|
||||
sckcr);
|
||||
writel((readl(sckcr) & ~osc->bits->cr_osc32en) |
|
||||
osc->bits->cr_osc32byp, sckcr);
|
||||
|
||||
hw = &osc->hw;
|
||||
ret = clk_hw_register(NULL, &osc->hw);
|
||||
@ -173,7 +182,7 @@ 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);
|
||||
writel(readl(sckcr) | osc->bits->cr_rcen, sckcr);
|
||||
|
||||
usleep_range(osc->startup_usec, osc->startup_usec + 1);
|
||||
|
||||
@ -185,14 +194,14 @@ 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);
|
||||
writel(readl(sckcr) & ~osc->bits->cr_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);
|
||||
return !!(readl(osc->sckcr) & osc->bits->cr_rcen);
|
||||
}
|
||||
|
||||
static const struct clk_ops slow_rc_osc_ops = {
|
||||
@ -208,7 +217,8 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr,
|
||||
const char *name,
|
||||
unsigned long frequency,
|
||||
unsigned long accuracy,
|
||||
unsigned long startup)
|
||||
unsigned long startup,
|
||||
const struct clk_slow_bits *bits)
|
||||
{
|
||||
struct clk_slow_rc_osc *osc;
|
||||
struct clk_hw *hw;
|
||||
@ -230,6 +240,7 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr,
|
||||
|
||||
osc->hw.init = &init;
|
||||
osc->sckcr = sckcr;
|
||||
osc->bits = bits;
|
||||
osc->frequency = frequency;
|
||||
osc->accuracy = accuracy;
|
||||
osc->startup_usec = startup;
|
||||
@ -255,14 +266,14 @@ static int clk_sam9x5_slow_set_parent(struct clk_hw *hw, u8 index)
|
||||
|
||||
tmp = readl(sckcr);
|
||||
|
||||
if ((!index && !(tmp & AT91_SCKC_OSCSEL)) ||
|
||||
(index && (tmp & AT91_SCKC_OSCSEL)))
|
||||
if ((!index && !(tmp & slowck->bits->cr_oscsel)) ||
|
||||
(index && (tmp & slowck->bits->cr_oscsel)))
|
||||
return 0;
|
||||
|
||||
if (index)
|
||||
tmp |= AT91_SCKC_OSCSEL;
|
||||
tmp |= slowck->bits->cr_oscsel;
|
||||
else
|
||||
tmp &= ~AT91_SCKC_OSCSEL;
|
||||
tmp &= ~slowck->bits->cr_oscsel;
|
||||
|
||||
writel(tmp, sckcr);
|
||||
|
||||
@ -275,7 +286,7 @@ 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);
|
||||
return !!(readl(slowck->sckcr) & slowck->bits->cr_oscsel);
|
||||
}
|
||||
|
||||
static const struct clk_ops sam9x5_slow_ops = {
|
||||
@ -287,7 +298,8 @@ static struct clk_hw * __init
|
||||
at91_clk_register_sam9x5_slow(void __iomem *sckcr,
|
||||
const char *name,
|
||||
const char **parent_names,
|
||||
int num_parents)
|
||||
int num_parents,
|
||||
const struct clk_slow_bits *bits)
|
||||
{
|
||||
struct clk_sam9x5_slow *slowck;
|
||||
struct clk_hw *hw;
|
||||
@ -309,7 +321,8 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr,
|
||||
|
||||
slowck->hw.init = &init;
|
||||
slowck->sckcr = sckcr;
|
||||
slowck->parent = !!(readl(sckcr) & AT91_SCKC_OSCSEL);
|
||||
slowck->bits = bits;
|
||||
slowck->parent = !!(readl(sckcr) & slowck->bits->cr_oscsel);
|
||||
|
||||
hw = &slowck->hw;
|
||||
ret = clk_hw_register(NULL, &slowck->hw);
|
||||
@ -322,7 +335,8 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr,
|
||||
}
|
||||
|
||||
static void __init at91sam9x5_sckc_register(struct device_node *np,
|
||||
unsigned int rc_osc_startup_us)
|
||||
unsigned int rc_osc_startup_us,
|
||||
const struct clk_slow_bits *bits)
|
||||
{
|
||||
const char *parent_names[2] = { "slow_rc_osc", "slow_osc" };
|
||||
void __iomem *regbase = of_iomap(np, 0);
|
||||
@ -335,7 +349,8 @@ static void __init at91sam9x5_sckc_register(struct device_node *np,
|
||||
return;
|
||||
|
||||
hw = at91_clk_register_slow_rc_osc(regbase, parent_names[0], 32768,
|
||||
50000000, rc_osc_startup_us);
|
||||
50000000, rc_osc_startup_us,
|
||||
bits);
|
||||
if (IS_ERR(hw))
|
||||
return;
|
||||
|
||||
@ -358,11 +373,12 @@ static void __init at91sam9x5_sckc_register(struct device_node *np,
|
||||
return;
|
||||
|
||||
hw = at91_clk_register_slow_osc(regbase, parent_names[1], xtal_name,
|
||||
1200000, bypass);
|
||||
1200000, bypass, bits);
|
||||
if (IS_ERR(hw))
|
||||
return;
|
||||
|
||||
hw = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_names, 2);
|
||||
hw = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_names, 2,
|
||||
bits);
|
||||
if (IS_ERR(hw))
|
||||
return;
|
||||
|
||||
@ -373,16 +389,23 @@ static void __init at91sam9x5_sckc_register(struct device_node *np,
|
||||
of_clk_add_hw_provider(child, of_clk_hw_simple_get, hw);
|
||||
}
|
||||
|
||||
static const struct clk_slow_bits at91sam9x5_bits = {
|
||||
.cr_rcen = BIT(0),
|
||||
.cr_osc32en = BIT(1),
|
||||
.cr_osc32byp = BIT(2),
|
||||
.cr_oscsel = BIT(3),
|
||||
};
|
||||
|
||||
static void __init of_at91sam9x5_sckc_setup(struct device_node *np)
|
||||
{
|
||||
at91sam9x5_sckc_register(np, 75);
|
||||
at91sam9x5_sckc_register(np, 75, &at91sam9x5_bits);
|
||||
}
|
||||
CLK_OF_DECLARE(at91sam9x5_clk_sckc, "atmel,at91sam9x5-sckc",
|
||||
of_at91sam9x5_sckc_setup);
|
||||
|
||||
static void __init of_sama5d3_sckc_setup(struct device_node *np)
|
||||
{
|
||||
at91sam9x5_sckc_register(np, 500);
|
||||
at91sam9x5_sckc_register(np, 500, &at91sam9x5_bits);
|
||||
}
|
||||
CLK_OF_DECLARE(sama5d3_clk_sckc, "atmel,sama5d3-sckc",
|
||||
of_sama5d3_sckc_setup);
|
||||
@ -398,7 +421,7 @@ static int clk_sama5d4_slow_osc_prepare(struct clk_hw *hw)
|
||||
* Assume that if it has already been selected (for example by the
|
||||
* bootloader), enough time has aready passed.
|
||||
*/
|
||||
if ((readl(osc->sckcr) & AT91_SCKC_OSCSEL)) {
|
||||
if ((readl(osc->sckcr) & osc->bits->cr_oscsel)) {
|
||||
osc->prepared = true;
|
||||
return 0;
|
||||
}
|
||||
@ -421,6 +444,10 @@ static const struct clk_ops sama5d4_slow_osc_ops = {
|
||||
.is_prepared = clk_sama5d4_slow_osc_is_prepared,
|
||||
};
|
||||
|
||||
static const struct clk_slow_bits at91sama5d4_bits = {
|
||||
.cr_oscsel = BIT(3),
|
||||
};
|
||||
|
||||
static void __init of_sama5d4_sckc_setup(struct device_node *np)
|
||||
{
|
||||
void __iomem *regbase = of_iomap(np, 0);
|
||||
@ -455,6 +482,7 @@ static void __init of_sama5d4_sckc_setup(struct device_node *np)
|
||||
osc->hw.init = &init;
|
||||
osc->sckcr = regbase;
|
||||
osc->startup_usec = 1200000;
|
||||
osc->bits = &at91sama5d4_bits;
|
||||
|
||||
hw = &osc->hw;
|
||||
ret = clk_hw_register(NULL, &osc->hw);
|
||||
@ -463,7 +491,8 @@ static void __init of_sama5d4_sckc_setup(struct device_node *np)
|
||||
return;
|
||||
}
|
||||
|
||||
hw = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_names, 2);
|
||||
hw = at91_clk_register_sam9x5_slow(regbase, "slowck", parent_names, 2,
|
||||
&at91sama5d4_bits);
|
||||
if (IS_ERR(hw))
|
||||
return;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user