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Subject[PATCH 6/8] clk: at91: move sam9x60's PLL register offsets to PMC header
Date
Move SAM9X60's PLL register offsets to PMC header so that the
definitions would also be available from arch/arm/mach-at91/pm_suspend.S.
This is necessary to disable/enable PLLA for SAM9X60 on suspend/resume.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
drivers/clk/at91/clk-sam9x60-pll.c | 91 ++++++++++++++++----------------------
include/linux/clk/at91_pmc.h | 20 +++++++++
2 files changed, 57 insertions(+), 54 deletions(-)

diff --git a/drivers/clk/at91/clk-sam9x60-pll.c b/drivers/clk/at91/clk-sam9x60-pll.c
index dfb354a5ff18..e699803986e5 100644
--- a/drivers/clk/at91/clk-sam9x60-pll.c
+++ b/drivers/clk/at91/clk-sam9x60-pll.c
@@ -14,27 +14,8 @@

#include "pmc.h"

-#define PMC_PLL_CTRL0 0xc
-#define PMC_PLL_CTRL0_DIV_MSK GENMASK(7, 0)
-#define PMC_PLL_CTRL0_ENPLL BIT(28)
-#define PMC_PLL_CTRL0_ENPLLCK BIT(29)
-#define PMC_PLL_CTRL0_ENLOCK BIT(31)
-
-#define PMC_PLL_CTRL1 0x10
-#define PMC_PLL_CTRL1_FRACR_MSK GENMASK(21, 0)
-#define PMC_PLL_CTRL1_MUL_MSK GENMASK(30, 24)
-
-#define PMC_PLL_ACR 0x18
-#define PMC_PLL_ACR_DEFAULT_UPLL 0x12020010UL
-#define PMC_PLL_ACR_DEFAULT_PLLA 0x00020010UL
-#define PMC_PLL_ACR_UTMIVR BIT(12)
-#define PMC_PLL_ACR_UTMIBG BIT(13)
-#define PMC_PLL_ACR_LOOP_FILTER_MSK GENMASK(31, 24)
-
-#define PMC_PLL_UPDT 0x1c
-#define PMC_PLL_UPDT_UPDATE BIT(8)
-
-#define PMC_PLL_ISR0 0xec
+#define PMC_PLL_CTRL0_DIV_MSK GENMASK(7, 0)
+#define PMC_PLL_CTRL1_MUL_MSK GENMASK(30, 24)

#define PLL_DIV_MAX (FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, UINT_MAX) + 1)
#define UPLL_DIV 2
@@ -59,7 +40,7 @@ static inline bool sam9x60_pll_ready(struct regmap *regmap, int id)
{
unsigned int status;

- regmap_read(regmap, PMC_PLL_ISR0, &status);
+ regmap_read(regmap, AT91_PMC_PLL_ISR0, &status);

return !!(status & BIT(id));
}
@@ -74,12 +55,12 @@ static int sam9x60_pll_prepare(struct clk_hw *hw)
u32 val;

spin_lock_irqsave(pll->lock, flags);
- regmap_write(regmap, PMC_PLL_UPDT, pll->id);
+ regmap_write(regmap, AT91_PMC_PLL_UPDT, pll->id);

- regmap_read(regmap, PMC_PLL_CTRL0, &val);
+ regmap_read(regmap, AT91_PMC_PLL_CTRL0, &val);
div = FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, val);

- regmap_read(regmap, PMC_PLL_CTRL1, &val);
+ regmap_read(regmap, AT91_PMC_PLL_CTRL1, &val);
mul = FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, val);

if (sam9x60_pll_ready(regmap, pll->id) &&
@@ -88,39 +69,39 @@ static int sam9x60_pll_prepare(struct clk_hw *hw)
return 0;
}

- /* Recommended value for PMC_PLL_ACR */
+ /* Recommended value for AT91_PMC_PLL_ACR */
if (pll->characteristics->upll)
- val = PMC_PLL_ACR_DEFAULT_UPLL;
+ val = AT91_PMC_PLL_ACR_DEFAULT_UPLL;
else
- val = PMC_PLL_ACR_DEFAULT_PLLA;
- regmap_write(regmap, PMC_PLL_ACR, val);
+ val = AT91_PMC_PLL_ACR_DEFAULT_PLLA;
+ regmap_write(regmap, AT91_PMC_PLL_ACR, val);

- regmap_write(regmap, PMC_PLL_CTRL1,
+ regmap_write(regmap, AT91_PMC_PLL_CTRL1,
FIELD_PREP(PMC_PLL_CTRL1_MUL_MSK, pll->mul));

if (pll->characteristics->upll) {
/* Enable the UTMI internal bandgap */
- val |= PMC_PLL_ACR_UTMIBG;
- regmap_write(regmap, PMC_PLL_ACR, val);
+ val |= AT91_PMC_PLL_ACR_UTMIBG;
+ regmap_write(regmap, AT91_PMC_PLL_ACR, val);

udelay(10);

/* Enable the UTMI internal regulator */
- val |= PMC_PLL_ACR_UTMIVR;
- regmap_write(regmap, PMC_PLL_ACR, val);
+ val |= AT91_PMC_PLL_ACR_UTMIVR;
+ regmap_write(regmap, AT91_PMC_PLL_ACR, val);

udelay(10);
}

- regmap_update_bits(regmap, PMC_PLL_UPDT,
- PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+ regmap_update_bits(regmap, AT91_PMC_PLL_UPDT,
+ AT91_PMC_PLL_UPDT_UPDATE, AT91_PMC_PLL_UPDT_UPDATE);

- regmap_write(regmap, PMC_PLL_CTRL0,
- PMC_PLL_CTRL0_ENLOCK | PMC_PLL_CTRL0_ENPLL |
- PMC_PLL_CTRL0_ENPLLCK | pll->div);
+ regmap_write(regmap, AT91_PMC_PLL_CTRL0,
+ AT91_PMC_PLL_CTRL0_ENLOCK | AT91_PMC_PLL_CTRL0_ENPLL |
+ AT91_PMC_PLL_CTRL0_ENPLLCK | pll->div);

- regmap_update_bits(regmap, PMC_PLL_UPDT,
- PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+ regmap_update_bits(regmap, AT91_PMC_PLL_UPDT,
+ AT91_PMC_PLL_UPDT_UPDATE, AT91_PMC_PLL_UPDT_UPDATE);

while (!sam9x60_pll_ready(regmap, pll->id))
cpu_relax();
@@ -144,22 +125,24 @@ static void sam9x60_pll_unprepare(struct clk_hw *hw)

spin_lock_irqsave(pll->lock, flags);

- regmap_write(pll->regmap, PMC_PLL_UPDT, pll->id);
+ regmap_write(pll->regmap, AT91_PMC_PLL_UPDT, pll->id);

- regmap_update_bits(pll->regmap, PMC_PLL_CTRL0,
- PMC_PLL_CTRL0_ENPLLCK, 0);
+ regmap_update_bits(pll->regmap, AT91_PMC_PLL_CTRL0,
+ AT91_PMC_PLL_CTRL0_ENPLLCK, 0);

- regmap_update_bits(pll->regmap, PMC_PLL_UPDT,
- PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+ regmap_update_bits(pll->regmap, AT91_PMC_PLL_UPDT,
+ AT91_PMC_PLL_UPDT_UPDATE, AT91_PMC_PLL_UPDT_UPDATE);

- regmap_update_bits(pll->regmap, PMC_PLL_CTRL0, PMC_PLL_CTRL0_ENPLL, 0);
+ regmap_update_bits(pll->regmap, AT91_PMC_PLL_CTRL0,
+ AT91_PMC_PLL_CTRL0_ENPLL, 0);

if (pll->characteristics->upll)
- regmap_update_bits(pll->regmap, PMC_PLL_ACR,
- PMC_PLL_ACR_UTMIBG | PMC_PLL_ACR_UTMIVR, 0);
+ regmap_update_bits(pll->regmap, AT91_PMC_PLL_ACR,
+ AT91_PMC_PLL_ACR_UTMIBG |
+ AT91_PMC_PLL_ACR_UTMIVR, 0);

- regmap_update_bits(pll->regmap, PMC_PLL_UPDT,
- PMC_PLL_UPDT_UPDATE, PMC_PLL_UPDT_UPDATE);
+ regmap_update_bits(pll->regmap, AT91_PMC_PLL_UPDT,
+ AT91_PMC_PLL_UPDT_UPDATE, AT91_PMC_PLL_UPDT_UPDATE);

spin_unlock_irqrestore(pll->lock, flags);
}
@@ -316,10 +299,10 @@ sam9x60_clk_register_pll(struct regmap *regmap, spinlock_t *lock,
pll->regmap = regmap;
pll->lock = lock;

- regmap_write(regmap, PMC_PLL_UPDT, id);
- regmap_read(regmap, PMC_PLL_CTRL0, &pllr);
+ regmap_write(regmap, AT91_PMC_PLL_UPDT, id);
+ regmap_read(regmap, AT91_PMC_PLL_CTRL0, &pllr);
pll->div = FIELD_GET(PMC_PLL_CTRL0_DIV_MSK, pllr);
- regmap_read(regmap, PMC_PLL_CTRL1, &pllr);
+ regmap_read(regmap, AT91_PMC_PLL_CTRL1, &pllr);
pll->mul = FIELD_GET(PMC_PLL_CTRL1_MUL_MSK, pllr);

hw = &pll->hw;
diff --git a/include/linux/clk/at91_pmc.h b/include/linux/clk/at91_pmc.h
index f3d691fc5f29..49a53a137610 100644
--- a/include/linux/clk/at91_pmc.h
+++ b/include/linux/clk/at91_pmc.h
@@ -33,16 +33,34 @@
#define AT91_PMC_HCK0 (1 << 16) /* AHB Clock (USB host) [AT91SAM9261 only] */
#define AT91_PMC_HCK1 (1 << 17) /* AHB Clock (LCD) [AT91SAM9261 only] */

+#define AT91_PMC_PLL_CTRL0 0x0C /* PLL Control Register 0 [for SAM9X60] */
+#define AT91_PMC_PLL_CTRL0_ENPLL (1 << 28) /* Enable PLL */
+#define AT91_PMC_PLL_CTRL0_ENPLLCK (1 << 29) /* Enable PLL clock for PMC */
+#define AT91_PMC_PLL_CTRL0_ENLOCK (1 << 31) /* Enable PLL lock */
+
+#define AT91_PMC_PLL_CTRL1 0x10 /* PLL Control Register 1 [for SAM9X60] */
+
#define AT91_PMC_PCER 0x10 /* Peripheral Clock Enable Register */
#define AT91_PMC_PCDR 0x14 /* Peripheral Clock Disable Register */
#define AT91_PMC_PCSR 0x18 /* Peripheral Clock Status Register */

+#define AT91_PMC_PLL_ACR 0x18 /* PLL Analog Control Register [for SAM9X60] */
+#define AT91_PMC_PLL_ACR_DEFAULT_UPLL 0x12020010UL /* Default PLL ACR value for UPLL */
+#define AT91_PMC_PLL_ACR_DEFAULT_PLLA 0x00020010UL /* Default PLL ACR value for PLLA */
+#define AT91_PMC_PLL_ACR_UTMIVR (1 << 12) /* UPLL Voltage regulator Control */
+#define AT91_PMC_PLL_ACR_UTMIBG (1 << 13) /* UPLL Bandgap Control */
+
#define AT91_CKGR_UCKR 0x1C /* UTMI Clock Register [some SAM9] */
#define AT91_PMC_UPLLEN (1 << 16) /* UTMI PLL Enable */
#define AT91_PMC_UPLLCOUNT (0xf << 20) /* UTMI PLL Start-up Time */
#define AT91_PMC_BIASEN (1 << 24) /* UTMI BIAS Enable */
#define AT91_PMC_BIASCOUNT (0xf << 28) /* UTMI BIAS Start-up Time */

+#define AT91_PMC_PLL_UPDT 0x1C /* PMC PLL update register [for SAM9X60] */
+#define AT91_PMC_PLL_UPDT_UPDATE (1 << 8) /* Update PLL settings */
+#define AT91_PMC_PLL_UPDT_ID (1 << 0) /* PLL ID */
+#define AT91_PMC_PLL_UPDT_STUPTIM (0xff << 16) /* Startup time */
+
#define AT91_CKGR_MOR 0x20 /* Main Oscillator Register [not on SAM9RL] */
#define AT91_PMC_MOSCEN (1 << 0) /* Main Oscillator Enable */
#define AT91_PMC_OSCBYPASS (1 << 1) /* Oscillator Bypass */
@@ -183,6 +201,8 @@
#define AT91_PMC_WPVS (0x1 << 0) /* Write Protect Violation Status */
#define AT91_PMC_WPVSRC (0xffff << 8) /* Write Protect Violation Source */

+#define AT91_PMC_PLL_ISR0 0xEC /* PLL Interrupt Status Register 0 [SAM9X60 only] */
+
#define AT91_PMC_PCER1 0x100 /* Peripheral Clock Enable Register 1 [SAMA5 only]*/
#define AT91_PMC_PCDR1 0x104 /* Peripheral Clock Enable Register 1 */
#define AT91_PMC_PCSR1 0x108 /* Peripheral Clock Enable Register 1 */
--
2.7.4
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