From: Alexandre Belloni <alexandre.belloni@bootlin.com> To: Claudiu.Beznea@microchip.com Cc: mturquette@baylibre.com, sboyd@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, Nicolas.Ferre@microchip.com, Ludovic.Desroches@microchip.com, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 1/3] clk: at91: sckc: add support to specify registers bit offsets Date: Mon, 18 Feb 2019 22:08:11 +0100 [thread overview] Message-ID: <20190218210811.GV10129@piout.net> (raw) In-Reply-To: <1550146447-1441-2-git-send-email-claudiu.beznea@microchip.com> Hi, On 14/02/2019 12:14:28+0000, Claudiu.Beznea@microchip.com wrote: > From: Claudiu Beznea <claudiu.beznea@microchip.com> > > Different IPs uses different offsets in registers for the same > functionality, thus adapt the driver to support this. > > Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> > --- > drivers/clk/at91/sckc.c | 112 +++++++++++++++++++++++++++++++++--------------- > 1 file changed, 77 insertions(+), 35 deletions(-) > > diff --git a/drivers/clk/at91/sckc.c b/drivers/clk/at91/sckc.c > index ab6ecefc49ad..b7163d3a2269 100644 > --- a/drivers/clk/at91/sckc.c > +++ b/drivers/clk/at91/sckc.c > @@ -22,15 +22,25 @@ > #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) > +#define AT91_SCKC_CR 0x00 > +#define AT91_SCKC_RCEN(off) (1 << (off)->cr_rcen) > +#define AT91_SCKC_OSC32EN(off) (1 << (off)->cr_osc32en) > +#define AT91_SCKC_OSC32BYP(off) (1 << (off)->cr_osc32byp) > +#define AT91_SCKC_OSCSEL(off) (1 << (off)->cr_oscsel) You don't need those macros if you store BIT(off) instead of off in the members of clk_slow_offsets. > + > +#define AT91_SCKC_OFFSET_INVALID (32) > + This would also remove the need for that define as 0 would mean that the bit doesn't exist. > +struct clk_slow_offsets { > + u8 cr_rcen; > + u8 cr_osc32en; > + u8 cr_osc32byp; > + u8 cr_oscsel; > +}; > > struct clk_slow_osc { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > unsigned long startup_usec; > }; > > @@ -39,6 +49,7 @@ struct clk_slow_osc { > struct clk_sama5d4_slow_osc { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > unsigned long startup_usec; > bool prepared; > }; > @@ -48,6 +59,7 @@ struct clk_sama5d4_slow_osc { > struct clk_slow_rc_osc { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > unsigned long frequency; > unsigned long accuracy; > unsigned long startup_usec; > @@ -58,6 +70,7 @@ struct clk_slow_rc_osc { > struct clk_sam9x5_slow { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > u8 parent; > }; > > @@ -69,10 +82,11 @@ 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 & (AT91_SCKC_OSC32BYP(osc->offsets) | > + AT91_SCKC_OSC32EN(osc->offsets))) > return 0; > > - writel(tmp | AT91_SCKC_OSC32EN, sckcr); > + writel(tmp | AT91_SCKC_OSC32EN(osc->offsets), sckcr); > > usleep_range(osc->startup_usec, osc->startup_usec + 1); > > @@ -85,10 +99,10 @@ 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 & AT91_SCKC_OSC32BYP(osc->offsets)) > return; > > - writel(tmp & ~AT91_SCKC_OSC32EN, sckcr); > + writel(tmp & ~AT91_SCKC_OSC32EN(osc->offsets), sckcr); > } > > static int clk_slow_osc_is_prepared(struct clk_hw *hw) > @@ -97,10 +111,10 @@ 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 & AT91_SCKC_OSC32BYP(osc->offsets)) > return 1; > > - return !!(tmp & AT91_SCKC_OSC32EN); > + return !!(tmp & AT91_SCKC_OSC32EN(osc->offsets)); > } > > static const struct clk_ops slow_osc_ops = { > @@ -114,7 +128,8 @@ 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_offsets *offsets) > { > struct clk_slow_osc *osc; > struct clk_hw *hw; > @@ -137,9 +152,11 @@ at91_clk_register_slow_osc(void __iomem *sckcr, > osc->hw.init = &init; > osc->sckcr = sckcr; > osc->startup_usec = startup; > + osc->offsets = offsets; > > if (bypass) > - writel((readl(sckcr) & ~AT91_SCKC_OSC32EN) | AT91_SCKC_OSC32BYP, > + writel((readl(sckcr) & ~AT91_SCKC_OSC32EN(osc->offsets)) | > + AT91_SCKC_OSC32BYP(osc->offsets), > sckcr); > > hw = &osc->hw; > @@ -153,7 +170,8 @@ at91_clk_register_slow_osc(void __iomem *sckcr, > } > > static void __init > -of_at91sam9x5_clk_slow_osc_setup(struct device_node *np, void __iomem *sckcr) > +of_at91sam9x5_clk_slow_osc_setup(struct device_node *np, void __iomem *sckcr, > + const struct clk_slow_offsets *offsets) > { > struct clk_hw *hw; > const char *parent_name; > @@ -167,7 +185,7 @@ of_at91sam9x5_clk_slow_osc_setup(struct device_node *np, void __iomem *sckcr) > bypass = of_property_read_bool(np, "atmel,osc-bypass"); > > hw = at91_clk_register_slow_osc(sckcr, name, parent_name, startup, > - bypass); > + bypass, offsets); > if (IS_ERR(hw)) > return; > > @@ -195,7 +213,7 @@ 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) | AT91_SCKC_RCEN(osc->offsets), sckcr); > > usleep_range(osc->startup_usec, osc->startup_usec + 1); > > @@ -207,14 +225,14 @@ 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) & ~AT91_SCKC_RCEN(osc->offsets), 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) & AT91_SCKC_RCEN(osc->offsets)); > } > > static const struct clk_ops slow_rc_osc_ops = { > @@ -230,7 +248,8 @@ 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_offsets *offsets) > { > struct clk_slow_rc_osc *osc; > struct clk_hw *hw; > @@ -252,6 +271,7 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr, > > osc->hw.init = &init; > osc->sckcr = sckcr; > + osc->offsets = offsets; > osc->frequency = frequency; > osc->accuracy = accuracy; > osc->startup_usec = startup; > @@ -267,7 +287,8 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr, > } > > static void __init > -of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np, void __iomem *sckcr) > +of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np, void __iomem *sckcr, > + const struct clk_slow_offsets *offsets) > { > struct clk_hw *hw; > u32 frequency = 0; > @@ -281,7 +302,7 @@ of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np, void __iomem *sckcr) > of_property_read_u32(np, "atmel,startup-time-usec", &startup); > > hw = at91_clk_register_slow_rc_osc(sckcr, name, frequency, accuracy, > - startup); > + startup, offsets); > if (IS_ERR(hw)) > return; > > @@ -299,14 +320,14 @@ 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 & AT91_SCKC_OSCSEL(slowck->offsets))) || > + (index && (tmp & AT91_SCKC_OSCSEL(slowck->offsets)))) > return 0; > > if (index) > - tmp |= AT91_SCKC_OSCSEL; > + tmp |= AT91_SCKC_OSCSEL(slowck->offsets); > else > - tmp &= ~AT91_SCKC_OSCSEL; > + tmp &= ~AT91_SCKC_OSCSEL(slowck->offsets); > > writel(tmp, sckcr); > > @@ -319,7 +340,7 @@ 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) & AT91_SCKC_OSCSEL(slowck->offsets)); > } > > static const struct clk_ops sam9x5_slow_ops = { > @@ -331,7 +352,8 @@ 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_offsets *offsets) > { > struct clk_sam9x5_slow *slowck; > struct clk_hw *hw; > @@ -353,7 +375,8 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr, > > slowck->hw.init = &init; > slowck->sckcr = sckcr; > - slowck->parent = !!(readl(sckcr) & AT91_SCKC_OSCSEL); > + slowck->offsets = offsets; > + slowck->parent = !!(readl(sckcr) & AT91_SCKC_OSCSEL(slowck->offsets)); > > hw = &slowck->hw; > ret = clk_hw_register(NULL, &slowck->hw); > @@ -366,7 +389,8 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr, > } > > static void __init > -of_at91sam9x5_clk_slow_setup(struct device_node *np, void __iomem *sckcr) > +of_at91sam9x5_clk_slow_setup(struct device_node *np, void __iomem *sckcr, > + const struct clk_slow_offsets *offsets) > { > struct clk_hw *hw; > const char *parent_names[2]; > @@ -382,7 +406,7 @@ of_at91sam9x5_clk_slow_setup(struct device_node *np, void __iomem *sckcr) > of_property_read_string(np, "clock-output-names", &name); > > hw = at91_clk_register_sam9x5_slow(sckcr, name, parent_names, > - num_parents); > + num_parents, offsets); > if (IS_ERR(hw)) > return; > > @@ -406,10 +430,18 @@ static const struct of_device_id sckc_clk_ids[] __initconst = { > { /*sentinel*/ } > }; > > +static const struct clk_slow_offsets at91sam9x5_offsets = { > + .cr_rcen = 0, > + .cr_osc32en = 1, > + .cr_osc32byp = 2, > + .cr_oscsel = 3, > +}; > + > static void __init of_at91sam9x5_sckc_setup(struct device_node *np) > { > struct device_node *childnp; > - void (*clk_setup)(struct device_node *, void __iomem *); > + void (*clk_setup)(struct device_node *np, void __iomem *io, > + const struct clk_slow_offsets *offsets); > const struct of_device_id *clk_id; > void __iomem *regbase = of_iomap(np, 0); > > @@ -421,7 +453,7 @@ static void __init of_at91sam9x5_sckc_setup(struct device_node *np) > if (!clk_id) > continue; > clk_setup = clk_id->data; > - clk_setup(childnp, regbase); > + clk_setup(childnp, regbase, &at91sam9x5_offsets); > } > } > CLK_OF_DECLARE(at91sam9x5_clk_sckc, "atmel,at91sam9x5-sckc", > @@ -438,7 +470,7 @@ 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) & AT91_SCKC_OSCSEL(osc->offsets))) { > osc->prepared = true; > return 0; > } > @@ -461,6 +493,13 @@ static const struct clk_ops sama5d4_slow_osc_ops = { > .is_prepared = clk_sama5d4_slow_osc_is_prepared, > }; > > +static const struct clk_slow_offsets at91sama5d4_offsets = { > + .cr_rcen = AT91_SCKC_OFFSET_INVALID, > + .cr_osc32en = AT91_SCKC_OFFSET_INVALID, > + .cr_osc32byp = AT91_SCKC_OFFSET_INVALID, > + .cr_oscsel = 3, > +}; > + I don't think you need to change the sama5d4 part as it is not affected by any change in the sam9x5 part. > static void __init of_sama5d4_sckc_setup(struct device_node *np) > { > void __iomem *regbase = of_iomap(np, 0); > @@ -498,9 +537,11 @@ static void __init of_sama5d4_sckc_setup(struct device_node *np) > osc->hw.init = &init; > osc->sckcr = regbase; > osc->startup_usec = 1200000; > + osc->offsets = &at91sama5d4_offsets; > > if (bypass) > - writel((readl(regbase) | AT91_SCKC_OSC32BYP), regbase); > + writel((readl(regbase) | AT91_SCKC_OSC32BYP(osc->offsets)), > + regbase); > > hw = &osc->hw; > ret = clk_hw_register(NULL, &osc->hw); > @@ -509,7 +550,8 @@ 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_offsets); > if (IS_ERR(hw)) > return; > > -- > 2.7.4 > -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Belloni <alexandre.belloni@bootlin.com> To: Claudiu.Beznea@microchip.com Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, sboyd@kernel.org, mturquette@baylibre.com, linux-kernel@vger.kernel.org, Ludovic.Desroches@microchip.com, robh+dt@kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 1/3] clk: at91: sckc: add support to specify registers bit offsets Date: Mon, 18 Feb 2019 22:08:11 +0100 [thread overview] Message-ID: <20190218210811.GV10129@piout.net> (raw) In-Reply-To: <1550146447-1441-2-git-send-email-claudiu.beznea@microchip.com> Hi, On 14/02/2019 12:14:28+0000, Claudiu.Beznea@microchip.com wrote: > From: Claudiu Beznea <claudiu.beznea@microchip.com> > > Different IPs uses different offsets in registers for the same > functionality, thus adapt the driver to support this. > > Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com> > --- > drivers/clk/at91/sckc.c | 112 +++++++++++++++++++++++++++++++++--------------- > 1 file changed, 77 insertions(+), 35 deletions(-) > > diff --git a/drivers/clk/at91/sckc.c b/drivers/clk/at91/sckc.c > index ab6ecefc49ad..b7163d3a2269 100644 > --- a/drivers/clk/at91/sckc.c > +++ b/drivers/clk/at91/sckc.c > @@ -22,15 +22,25 @@ > #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) > +#define AT91_SCKC_CR 0x00 > +#define AT91_SCKC_RCEN(off) (1 << (off)->cr_rcen) > +#define AT91_SCKC_OSC32EN(off) (1 << (off)->cr_osc32en) > +#define AT91_SCKC_OSC32BYP(off) (1 << (off)->cr_osc32byp) > +#define AT91_SCKC_OSCSEL(off) (1 << (off)->cr_oscsel) You don't need those macros if you store BIT(off) instead of off in the members of clk_slow_offsets. > + > +#define AT91_SCKC_OFFSET_INVALID (32) > + This would also remove the need for that define as 0 would mean that the bit doesn't exist. > +struct clk_slow_offsets { > + u8 cr_rcen; > + u8 cr_osc32en; > + u8 cr_osc32byp; > + u8 cr_oscsel; > +}; > > struct clk_slow_osc { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > unsigned long startup_usec; > }; > > @@ -39,6 +49,7 @@ struct clk_slow_osc { > struct clk_sama5d4_slow_osc { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > unsigned long startup_usec; > bool prepared; > }; > @@ -48,6 +59,7 @@ struct clk_sama5d4_slow_osc { > struct clk_slow_rc_osc { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > unsigned long frequency; > unsigned long accuracy; > unsigned long startup_usec; > @@ -58,6 +70,7 @@ struct clk_slow_rc_osc { > struct clk_sam9x5_slow { > struct clk_hw hw; > void __iomem *sckcr; > + const struct clk_slow_offsets *offsets; > u8 parent; > }; > > @@ -69,10 +82,11 @@ 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 & (AT91_SCKC_OSC32BYP(osc->offsets) | > + AT91_SCKC_OSC32EN(osc->offsets))) > return 0; > > - writel(tmp | AT91_SCKC_OSC32EN, sckcr); > + writel(tmp | AT91_SCKC_OSC32EN(osc->offsets), sckcr); > > usleep_range(osc->startup_usec, osc->startup_usec + 1); > > @@ -85,10 +99,10 @@ 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 & AT91_SCKC_OSC32BYP(osc->offsets)) > return; > > - writel(tmp & ~AT91_SCKC_OSC32EN, sckcr); > + writel(tmp & ~AT91_SCKC_OSC32EN(osc->offsets), sckcr); > } > > static int clk_slow_osc_is_prepared(struct clk_hw *hw) > @@ -97,10 +111,10 @@ 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 & AT91_SCKC_OSC32BYP(osc->offsets)) > return 1; > > - return !!(tmp & AT91_SCKC_OSC32EN); > + return !!(tmp & AT91_SCKC_OSC32EN(osc->offsets)); > } > > static const struct clk_ops slow_osc_ops = { > @@ -114,7 +128,8 @@ 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_offsets *offsets) > { > struct clk_slow_osc *osc; > struct clk_hw *hw; > @@ -137,9 +152,11 @@ at91_clk_register_slow_osc(void __iomem *sckcr, > osc->hw.init = &init; > osc->sckcr = sckcr; > osc->startup_usec = startup; > + osc->offsets = offsets; > > if (bypass) > - writel((readl(sckcr) & ~AT91_SCKC_OSC32EN) | AT91_SCKC_OSC32BYP, > + writel((readl(sckcr) & ~AT91_SCKC_OSC32EN(osc->offsets)) | > + AT91_SCKC_OSC32BYP(osc->offsets), > sckcr); > > hw = &osc->hw; > @@ -153,7 +170,8 @@ at91_clk_register_slow_osc(void __iomem *sckcr, > } > > static void __init > -of_at91sam9x5_clk_slow_osc_setup(struct device_node *np, void __iomem *sckcr) > +of_at91sam9x5_clk_slow_osc_setup(struct device_node *np, void __iomem *sckcr, > + const struct clk_slow_offsets *offsets) > { > struct clk_hw *hw; > const char *parent_name; > @@ -167,7 +185,7 @@ of_at91sam9x5_clk_slow_osc_setup(struct device_node *np, void __iomem *sckcr) > bypass = of_property_read_bool(np, "atmel,osc-bypass"); > > hw = at91_clk_register_slow_osc(sckcr, name, parent_name, startup, > - bypass); > + bypass, offsets); > if (IS_ERR(hw)) > return; > > @@ -195,7 +213,7 @@ 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) | AT91_SCKC_RCEN(osc->offsets), sckcr); > > usleep_range(osc->startup_usec, osc->startup_usec + 1); > > @@ -207,14 +225,14 @@ 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) & ~AT91_SCKC_RCEN(osc->offsets), 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) & AT91_SCKC_RCEN(osc->offsets)); > } > > static const struct clk_ops slow_rc_osc_ops = { > @@ -230,7 +248,8 @@ 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_offsets *offsets) > { > struct clk_slow_rc_osc *osc; > struct clk_hw *hw; > @@ -252,6 +271,7 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr, > > osc->hw.init = &init; > osc->sckcr = sckcr; > + osc->offsets = offsets; > osc->frequency = frequency; > osc->accuracy = accuracy; > osc->startup_usec = startup; > @@ -267,7 +287,8 @@ at91_clk_register_slow_rc_osc(void __iomem *sckcr, > } > > static void __init > -of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np, void __iomem *sckcr) > +of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np, void __iomem *sckcr, > + const struct clk_slow_offsets *offsets) > { > struct clk_hw *hw; > u32 frequency = 0; > @@ -281,7 +302,7 @@ of_at91sam9x5_clk_slow_rc_osc_setup(struct device_node *np, void __iomem *sckcr) > of_property_read_u32(np, "atmel,startup-time-usec", &startup); > > hw = at91_clk_register_slow_rc_osc(sckcr, name, frequency, accuracy, > - startup); > + startup, offsets); > if (IS_ERR(hw)) > return; > > @@ -299,14 +320,14 @@ 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 & AT91_SCKC_OSCSEL(slowck->offsets))) || > + (index && (tmp & AT91_SCKC_OSCSEL(slowck->offsets)))) > return 0; > > if (index) > - tmp |= AT91_SCKC_OSCSEL; > + tmp |= AT91_SCKC_OSCSEL(slowck->offsets); > else > - tmp &= ~AT91_SCKC_OSCSEL; > + tmp &= ~AT91_SCKC_OSCSEL(slowck->offsets); > > writel(tmp, sckcr); > > @@ -319,7 +340,7 @@ 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) & AT91_SCKC_OSCSEL(slowck->offsets)); > } > > static const struct clk_ops sam9x5_slow_ops = { > @@ -331,7 +352,8 @@ 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_offsets *offsets) > { > struct clk_sam9x5_slow *slowck; > struct clk_hw *hw; > @@ -353,7 +375,8 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr, > > slowck->hw.init = &init; > slowck->sckcr = sckcr; > - slowck->parent = !!(readl(sckcr) & AT91_SCKC_OSCSEL); > + slowck->offsets = offsets; > + slowck->parent = !!(readl(sckcr) & AT91_SCKC_OSCSEL(slowck->offsets)); > > hw = &slowck->hw; > ret = clk_hw_register(NULL, &slowck->hw); > @@ -366,7 +389,8 @@ at91_clk_register_sam9x5_slow(void __iomem *sckcr, > } > > static void __init > -of_at91sam9x5_clk_slow_setup(struct device_node *np, void __iomem *sckcr) > +of_at91sam9x5_clk_slow_setup(struct device_node *np, void __iomem *sckcr, > + const struct clk_slow_offsets *offsets) > { > struct clk_hw *hw; > const char *parent_names[2]; > @@ -382,7 +406,7 @@ of_at91sam9x5_clk_slow_setup(struct device_node *np, void __iomem *sckcr) > of_property_read_string(np, "clock-output-names", &name); > > hw = at91_clk_register_sam9x5_slow(sckcr, name, parent_names, > - num_parents); > + num_parents, offsets); > if (IS_ERR(hw)) > return; > > @@ -406,10 +430,18 @@ static const struct of_device_id sckc_clk_ids[] __initconst = { > { /*sentinel*/ } > }; > > +static const struct clk_slow_offsets at91sam9x5_offsets = { > + .cr_rcen = 0, > + .cr_osc32en = 1, > + .cr_osc32byp = 2, > + .cr_oscsel = 3, > +}; > + > static void __init of_at91sam9x5_sckc_setup(struct device_node *np) > { > struct device_node *childnp; > - void (*clk_setup)(struct device_node *, void __iomem *); > + void (*clk_setup)(struct device_node *np, void __iomem *io, > + const struct clk_slow_offsets *offsets); > const struct of_device_id *clk_id; > void __iomem *regbase = of_iomap(np, 0); > > @@ -421,7 +453,7 @@ static void __init of_at91sam9x5_sckc_setup(struct device_node *np) > if (!clk_id) > continue; > clk_setup = clk_id->data; > - clk_setup(childnp, regbase); > + clk_setup(childnp, regbase, &at91sam9x5_offsets); > } > } > CLK_OF_DECLARE(at91sam9x5_clk_sckc, "atmel,at91sam9x5-sckc", > @@ -438,7 +470,7 @@ 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) & AT91_SCKC_OSCSEL(osc->offsets))) { > osc->prepared = true; > return 0; > } > @@ -461,6 +493,13 @@ static const struct clk_ops sama5d4_slow_osc_ops = { > .is_prepared = clk_sama5d4_slow_osc_is_prepared, > }; > > +static const struct clk_slow_offsets at91sama5d4_offsets = { > + .cr_rcen = AT91_SCKC_OFFSET_INVALID, > + .cr_osc32en = AT91_SCKC_OFFSET_INVALID, > + .cr_osc32byp = AT91_SCKC_OFFSET_INVALID, > + .cr_oscsel = 3, > +}; > + I don't think you need to change the sama5d4 part as it is not affected by any change in the sam9x5 part. > static void __init of_sama5d4_sckc_setup(struct device_node *np) > { > void __iomem *regbase = of_iomap(np, 0); > @@ -498,9 +537,11 @@ static void __init of_sama5d4_sckc_setup(struct device_node *np) > osc->hw.init = &init; > osc->sckcr = regbase; > osc->startup_usec = 1200000; > + osc->offsets = &at91sama5d4_offsets; > > if (bypass) > - writel((readl(regbase) | AT91_SCKC_OSC32BYP), regbase); > + writel((readl(regbase) | AT91_SCKC_OSC32BYP(osc->offsets)), > + regbase); > > hw = &osc->hw; > ret = clk_hw_register(NULL, &osc->hw); > @@ -509,7 +550,8 @@ 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_offsets); > if (IS_ERR(hw)) > return; > > -- > 2.7.4 > -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-02-18 21:08 UTC|newest] Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-02-14 12:14 [PATCH v2 0/3] add slow clock support for SAM9X60 Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-14 12:14 ` [PATCH v2 1/3] clk: at91: sckc: add support to specify registers bit offsets Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-18 21:08 ` Alexandre Belloni [this message] 2019-02-18 21:08 ` Alexandre Belloni 2019-02-19 9:17 ` Claudiu.Beznea 2019-02-19 9:17 ` Claudiu.Beznea 2019-02-19 9:17 ` Claudiu.Beznea 2019-02-14 12:14 ` [PATCH v2 2/3] clk: at91: sckc: add support for SAM9X60 Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-18 21:20 ` Alexandre Belloni 2019-02-18 21:20 ` Alexandre Belloni 2019-02-19 9:17 ` Claudiu.Beznea 2019-02-19 9:17 ` Claudiu.Beznea 2019-02-19 9:17 ` Claudiu.Beznea 2019-02-20 11:06 ` Alexandre Belloni 2019-02-20 11:06 ` Alexandre Belloni 2019-02-14 12:14 ` [PATCH v2 3/3] dt-bindings: clk: at91: add bindings for SAM9X60's slow clock controller Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-14 12:14 ` Claudiu.Beznea 2019-02-18 20:04 ` Rob Herring 2019-02-18 20:04 ` Rob Herring 2019-02-18 20:04 ` Rob Herring
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