diff options
author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2019-05-21 10:11:26 +0000 |
---|---|---|
committer | Stephen Boyd <sboyd@kernel.org> | 2019-06-26 11:32:53 -0700 |
commit | abaceffc88ebf510ffb95380985cb3da16d7aa9d (patch) | |
tree | 66dc18ba0657ac85bf652cb3f483871f517dcbe2 /drivers/clk/at91 | |
parent | 5cf6d876a7d05fdd893c74b4c274bbe78fbe9698 (diff) | |
download | linux-abaceffc88ebf510ffb95380985cb3da16d7aa9d.tar.bz2 |
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>
Diffstat (limited to 'drivers/clk/at91')
-rw-r--r-- | drivers/clk/at91/sckc.c | 93 |
1 files changed, 61 insertions, 32 deletions
diff --git a/drivers/clk/at91/sckc.c b/drivers/clk/at91/sckc.c index 6c55a7a86f79..ab18b1da269f 100644 --- a/drivers/clk/at91/sckc.c +++ b/drivers/clk/at91/sckc.c @@ -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; |