[PATCH v10 09/18] clk: sifive: fu540-prci: Add clock enable and disable ops
Pragnesh Patel
pragnesh.patel at sifive.com
Thu May 14 13:52:47 CEST 2020
Added clock enable and disable functions in prci ops
Signed-off-by: Pragnesh Patel <pragnesh.patel at sifive.com>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Tested-by: Bin Meng <bmeng.cn at gmail.com>
---
drivers/clk/sifive/fu540-prci.c | 108 ++++++++++++++++++++++++++++----
1 file changed, 96 insertions(+), 12 deletions(-)
diff --git a/drivers/clk/sifive/fu540-prci.c b/drivers/clk/sifive/fu540-prci.c
index 8847178001..bf06c3a3bb 100644
--- a/drivers/clk/sifive/fu540-prci.c
+++ b/drivers/clk/sifive/fu540-prci.c
@@ -68,6 +68,11 @@
#define PRCI_COREPLLCFG0_LOCK_SHIFT 31
#define PRCI_COREPLLCFG0_LOCK_MASK (0x1 << PRCI_COREPLLCFG0_LOCK_SHIFT)
+/* COREPLLCFG1 */
+#define PRCI_COREPLLCFG1_OFFSET 0x8
+#define PRCI_COREPLLCFG1_CKE_SHIFT 31
+#define PRCI_COREPLLCFG1_CKE_MASK (0x1 << PRCI_COREPLLCFG1_CKE_SHIFT)
+
/* DDRPLLCFG0 */
#define PRCI_DDRPLLCFG0_OFFSET 0xc
#define PRCI_DDRPLLCFG0_DIVR_SHIFT 0
@@ -87,7 +92,7 @@
/* DDRPLLCFG1 */
#define PRCI_DDRPLLCFG1_OFFSET 0x10
-#define PRCI_DDRPLLCFG1_CKE_SHIFT 24
+#define PRCI_DDRPLLCFG1_CKE_SHIFT 31
#define PRCI_DDRPLLCFG1_CKE_MASK (0x1 << PRCI_DDRPLLCFG1_CKE_SHIFT)
/* GEMGXLPLLCFG0 */
@@ -114,7 +119,7 @@
/* GEMGXLPLLCFG1 */
#define PRCI_GEMGXLPLLCFG1_OFFSET 0x20
-#define PRCI_GEMGXLPLLCFG1_CKE_SHIFT 24
+#define PRCI_GEMGXLPLLCFG1_CKE_SHIFT 31
#define PRCI_GEMGXLPLLCFG1_CKE_MASK (0x1 << PRCI_GEMGXLPLLCFG1_CKE_SHIFT)
/* CORECLKSEL */
@@ -142,7 +147,7 @@
(0x1 << PRCI_DEVICESRESETREG_GEMGXL_RST_N_SHIFT)
/* CLKMUXSTATUSREG */
-#define PRCI_CLKMUXSTATUSREG_OFFSET 0x2c
+#define PRCI_CLKMUXSTATUSREG_OFFSET 0x2c
#define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT 1
#define PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_MASK \
(0x1 << PRCI_CLKMUXSTATUSREG_TLCLKSEL_STATUS_SHIFT)
@@ -170,6 +175,7 @@ struct __prci_data {
* @enable_bypass: fn ptr to code to bypass the WRPLL (if applicable; else NULL)
* @disable_bypass: fn ptr to code to not bypass the WRPLL (or NULL)
* @cfg0_offs: WRPLL CFG0 register offset (in bytes) from the PRCI base address
+ * @cfg1_offs: WRPLL CFG1 register offset (in bytes) from the PRCI base address
*
* @enable_bypass and @disable_bypass are used for WRPLL instances
* that contain a separate external glitchless clock mux downstream
@@ -180,6 +186,7 @@ struct __prci_wrpll_data {
void (*enable_bypass)(struct __prci_data *pd);
void (*disable_bypass)(struct __prci_data *pd);
u8 cfg0_offs;
+ u8 cfg1_offs;
};
struct __prci_clock;
@@ -194,6 +201,7 @@ struct __prci_clock_ops {
unsigned long *parent_rate);
unsigned long (*recalc_rate)(struct __prci_clock *pc,
unsigned long parent_rate);
+ int (*enable_clk)(struct __prci_clock *pc, bool enable);
};
/**
@@ -316,7 +324,7 @@ static u32 __prci_wrpll_pack(const struct wrpll_cfg *c)
}
/**
- * __prci_wrpll_read_cfg() - read the WRPLL configuration from the PRCI
+ * __prci_wrpll_read_cfg0() - read the WRPLL configuration from the PRCI
* @pd: PRCI context
* @pwd: PRCI WRPLL metadata
*
@@ -327,14 +335,14 @@ static u32 __prci_wrpll_pack(const struct wrpll_cfg *c)
* Context: Any context. Caller must prevent the records pointed to by
* @pd and @pwd from changing during execution.
*/
-static void __prci_wrpll_read_cfg(struct __prci_data *pd,
- struct __prci_wrpll_data *pwd)
+static void __prci_wrpll_read_cfg0(struct __prci_data *pd,
+ struct __prci_wrpll_data *pwd)
{
__prci_wrpll_unpack(&pwd->c, __prci_readl(pd, pwd->cfg0_offs));
}
/**
- * __prci_wrpll_write_cfg() - write WRPLL configuration into the PRCI
+ * __prci_wrpll_write_cfg0() - write WRPLL configuration into the PRCI
* @pd: PRCI context
* @pwd: PRCI WRPLL metadata
* @c: WRPLL configuration record to write
@@ -347,15 +355,29 @@ static void __prci_wrpll_read_cfg(struct __prci_data *pd,
* Context: Any context. Caller must prevent the records pointed to by
* @pd and @pwd from changing during execution.
*/
-static void __prci_wrpll_write_cfg(struct __prci_data *pd,
- struct __prci_wrpll_data *pwd,
- struct wrpll_cfg *c)
+static void __prci_wrpll_write_cfg0(struct __prci_data *pd,
+ struct __prci_wrpll_data *pwd,
+ struct wrpll_cfg *c)
{
__prci_writel(__prci_wrpll_pack(c), pwd->cfg0_offs, pd);
memcpy(&pwd->c, c, sizeof(*c));
}
+/**
+ * __prci_wrpll_write_cfg1() - write Clock enable/disable configuration
+ * into the PRCI
+ * @pd: PRCI context
+ * @pwd: PRCI WRPLL metadata
+ * @enable: Clock enable or disable value
+ */
+static void __prci_wrpll_write_cfg1(struct __prci_data *pd,
+ struct __prci_wrpll_data *pwd,
+ u32 enable)
+{
+ __prci_writel(enable, pwd->cfg1_offs, pd);
+}
+
/* Core clock mux control */
/**
@@ -437,7 +459,7 @@ static int sifive_fu540_prci_wrpll_set_rate(struct __prci_clock *pc,
if (pwd->enable_bypass)
pwd->enable_bypass(pd);
- __prci_wrpll_write_cfg(pd, pwd, &pwd->c);
+ __prci_wrpll_write_cfg0(pd, pwd, &pwd->c);
udelay(wrpll_calc_max_lock_us(&pwd->c));
@@ -447,14 +469,35 @@ static int sifive_fu540_prci_wrpll_set_rate(struct __prci_clock *pc,
return 0;
}
+static int sifive_fu540_prci_clock_enable(struct __prci_clock *pc, bool enable)
+{
+ struct __prci_wrpll_data *pwd = pc->pwd;
+ struct __prci_data *pd = pc->pd;
+
+ if (enable) {
+ __prci_wrpll_write_cfg1(pd, pwd, PRCI_COREPLLCFG1_CKE_MASK);
+ } else {
+ u32 r;
+
+ r = __prci_readl(pd, pwd->cfg1_offs);
+ r &= ~PRCI_COREPLLCFG1_CKE_MASK;
+
+ __prci_wrpll_write_cfg1(pd, pwd, r);
+ }
+
+ return 0;
+}
+
static const struct __prci_clock_ops sifive_fu540_prci_wrpll_clk_ops = {
.set_rate = sifive_fu540_prci_wrpll_set_rate,
.round_rate = sifive_fu540_prci_wrpll_round_rate,
.recalc_rate = sifive_fu540_prci_wrpll_recalc_rate,
+ .enable_clk = sifive_fu540_prci_clock_enable,
};
static const struct __prci_clock_ops sifive_fu540_prci_wrpll_ro_clk_ops = {
.recalc_rate = sifive_fu540_prci_wrpll_recalc_rate,
+ .enable_clk = sifive_fu540_prci_clock_enable,
};
/* TLCLKSEL clock integration */
@@ -484,16 +527,19 @@ static const struct __prci_clock_ops sifive_fu540_prci_tlclksel_clk_ops = {
static struct __prci_wrpll_data __prci_corepll_data = {
.cfg0_offs = PRCI_COREPLLCFG0_OFFSET,
+ .cfg1_offs = PRCI_COREPLLCFG1_OFFSET,
.enable_bypass = __prci_coreclksel_use_hfclk,
.disable_bypass = __prci_coreclksel_use_corepll,
};
static struct __prci_wrpll_data __prci_ddrpll_data = {
.cfg0_offs = PRCI_DDRPLLCFG0_OFFSET,
+ .cfg1_offs = PRCI_DDRPLLCFG1_OFFSET,
};
static struct __prci_wrpll_data __prci_gemgxlpll_data = {
.cfg0_offs = PRCI_GEMGXLPLLCFG0_OFFSET,
+ .cfg1_offs = PRCI_GEMGXLPLLCFG1_OFFSET,
};
/*
@@ -580,6 +626,42 @@ static ulong sifive_fu540_prci_set_rate(struct clk *clk, ulong rate)
return rate;
}
+static int sifive_fu540_prci_enable(struct clk *clk)
+{
+ struct __prci_clock *pc;
+ int ret = 0;
+
+ if (ARRAY_SIZE(__prci_init_clocks) <= clk->id)
+ return -ENXIO;
+
+ pc = &__prci_init_clocks[clk->id];
+ if (!pc->pd)
+ return -ENXIO;
+
+ if (pc->ops->enable_clk)
+ ret = pc->ops->enable_clk(pc, 1);
+
+ return ret;
+}
+
+static int sifive_fu540_prci_disable(struct clk *clk)
+{
+ struct __prci_clock *pc;
+ int ret = 0;
+
+ if (ARRAY_SIZE(__prci_init_clocks) <= clk->id)
+ return -ENXIO;
+
+ pc = &__prci_init_clocks[clk->id];
+ if (!pc->pd)
+ return -ENXIO;
+
+ if (pc->ops->enable_clk)
+ ret = pc->ops->enable_clk(pc, 0);
+
+ return ret;
+}
+
static int sifive_fu540_prci_probe(struct udevice *dev)
{
int i, err;
@@ -602,7 +684,7 @@ static int sifive_fu540_prci_probe(struct udevice *dev)
pc = &__prci_init_clocks[i];
pc->pd = pd;
if (pc->pwd)
- __prci_wrpll_read_cfg(pd, pc->pwd);
+ __prci_wrpll_read_cfg0(pd, pc->pwd);
}
return 0;
@@ -611,6 +693,8 @@ static int sifive_fu540_prci_probe(struct udevice *dev)
static struct clk_ops sifive_fu540_prci_ops = {
.set_rate = sifive_fu540_prci_set_rate,
.get_rate = sifive_fu540_prci_get_rate,
+ .enable = sifive_fu540_prci_enable,
+ .disable = sifive_fu540_prci_disable,
};
static const struct udevice_id sifive_fu540_prci_ids[] = {
--
2.17.1
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