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authorMichael Turquette <mturquette@baylibre.com>2015-10-20 08:49:11 -0700
committerMichael Turquette <mturquette@baylibre.com>2015-10-20 08:49:11 -0700
commiteae14465de250be75021659789f138a70a553ac5 (patch)
tree6dfe124d0ad901c24d63515af740baa837fb68b2 /drivers/clk
parentb30c64508b4131ceacc4b8fd9f01a78e1b1794bf (diff)
parent88d909bedf4df7285d6e8d8730425df0d163512e (diff)
Merge tag 'tegra-for-4.4-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into clk-next
clk: tegra: Changes for v4.4-rc1 This contains a patch that allows the DFLL to use clock rates higher than 2^31-1 Hz by using the ->determine_rate() operation instead of the ->round_rate() operation. Other than that there's a couple of cleanups in preparation for Tegra210 support.
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/tegra/clk-dfll.c114
-rw-r--r--drivers/clk/tegra/clk-tegra-audio.c25
-rw-r--r--drivers/clk/tegra/clk-tegra114.c8
-rw-r--r--drivers/clk/tegra/clk-tegra124.c8
-rw-r--r--drivers/clk/tegra/clk-tegra30.c8
-rw-r--r--drivers/clk/tegra/clk.h106
-rw-r--r--drivers/clk/tegra/cvb.c7
7 files changed, 163 insertions, 113 deletions
diff --git a/drivers/clk/tegra/clk-dfll.c b/drivers/clk/tegra/clk-dfll.c
index c4e3a52e225b..86a307b17eb0 100644
--- a/drivers/clk/tegra/clk-dfll.c
+++ b/drivers/clk/tegra/clk-dfll.c
@@ -469,56 +469,6 @@ static unsigned long dfll_scale_dvco_rate(int scale_bits,
}
/*
- * Monitor control
- */
-
-/**
- * dfll_calc_monitored_rate - convert DFLL_MONITOR_DATA_VAL rate into real freq
- * @monitor_data: value read from the DFLL_MONITOR_DATA_VAL bitfield
- * @ref_rate: DFLL reference clock rate
- *
- * Convert @monitor_data from DFLL_MONITOR_DATA_VAL units into cycles
- * per second. Returns the converted value.
- */
-static u64 dfll_calc_monitored_rate(u32 monitor_data,
- unsigned long ref_rate)
-{
- return monitor_data * (ref_rate / REF_CLK_CYC_PER_DVCO_SAMPLE);
-}
-
-/**
- * dfll_read_monitor_rate - return the DFLL's output rate from internal monitor
- * @td: DFLL instance
- *
- * If the DFLL is enabled, return the last rate reported by the DFLL's
- * internal monitoring hardware. This works in both open-loop and
- * closed-loop mode, and takes the output scaler setting into account.
- * Assumes that the monitor was programmed to monitor frequency before
- * the sample period started. If the driver believes that the DFLL is
- * currently uninitialized or disabled, it will return 0, since
- * otherwise the DFLL monitor data register will return the last
- * measured rate from when the DFLL was active.
- */
-static u64 dfll_read_monitor_rate(struct tegra_dfll *td)
-{
- u32 v, s;
- u64 pre_scaler_rate, post_scaler_rate;
-
- if (!dfll_is_running(td))
- return 0;
-
- v = dfll_readl(td, DFLL_MONITOR_DATA);
- v = (v & DFLL_MONITOR_DATA_VAL_MASK) >> DFLL_MONITOR_DATA_VAL_SHIFT;
- pre_scaler_rate = dfll_calc_monitored_rate(v, td->ref_rate);
-
- s = dfll_readl(td, DFLL_FREQ_REQ);
- s = (s & DFLL_FREQ_REQ_SCALE_MASK) >> DFLL_FREQ_REQ_SCALE_SHIFT;
- post_scaler_rate = dfll_scale_dvco_rate(s, pre_scaler_rate);
-
- return post_scaler_rate;
-}
-
-/*
* DFLL mode switching
*/
@@ -1006,24 +956,25 @@ static unsigned long dfll_clk_recalc_rate(struct clk_hw *hw,
return td->last_unrounded_rate;
}
-static long dfll_clk_round_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long *parent_rate)
+/* Must use determine_rate since it allows for rates exceeding 2^31-1 */
+static int dfll_clk_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *clk_req)
{
struct tegra_dfll *td = clk_hw_to_dfll(hw);
struct dfll_rate_req req;
int ret;
- ret = dfll_calculate_rate_request(td, &req, rate);
+ ret = dfll_calculate_rate_request(td, &req, clk_req->rate);
if (ret)
return ret;
/*
- * Don't return the rounded rate, since it doesn't really matter as
+ * Don't set the rounded rate, since it doesn't really matter as
* the output rate will be voltage controlled anyway, and cpufreq
* freaks out if any rounding happens.
*/
- return rate;
+
+ return 0;
}
static int dfll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -1039,7 +990,7 @@ static const struct clk_ops dfll_clk_ops = {
.enable = dfll_clk_enable,
.disable = dfll_clk_disable,
.recalc_rate = dfll_clk_recalc_rate,
- .round_rate = dfll_clk_round_rate,
+ .determine_rate = dfll_clk_determine_rate,
.set_rate = dfll_clk_set_rate,
};
@@ -1101,6 +1052,55 @@ static void dfll_unregister_clk(struct tegra_dfll *td)
*/
#ifdef CONFIG_DEBUG_FS
+/*
+ * Monitor control
+ */
+
+/**
+ * dfll_calc_monitored_rate - convert DFLL_MONITOR_DATA_VAL rate into real freq
+ * @monitor_data: value read from the DFLL_MONITOR_DATA_VAL bitfield
+ * @ref_rate: DFLL reference clock rate
+ *
+ * Convert @monitor_data from DFLL_MONITOR_DATA_VAL units into cycles
+ * per second. Returns the converted value.
+ */
+static u64 dfll_calc_monitored_rate(u32 monitor_data,
+ unsigned long ref_rate)
+{
+ return monitor_data * (ref_rate / REF_CLK_CYC_PER_DVCO_SAMPLE);
+}
+
+/**
+ * dfll_read_monitor_rate - return the DFLL's output rate from internal monitor
+ * @td: DFLL instance
+ *
+ * If the DFLL is enabled, return the last rate reported by the DFLL's
+ * internal monitoring hardware. This works in both open-loop and
+ * closed-loop mode, and takes the output scaler setting into account.
+ * Assumes that the monitor was programmed to monitor frequency before
+ * the sample period started. If the driver believes that the DFLL is
+ * currently uninitialized or disabled, it will return 0, since
+ * otherwise the DFLL monitor data register will return the last
+ * measured rate from when the DFLL was active.
+ */
+static u64 dfll_read_monitor_rate(struct tegra_dfll *td)
+{
+ u32 v, s;
+ u64 pre_scaler_rate, post_scaler_rate;
+
+ if (!dfll_is_running(td))
+ return 0;
+
+ v = dfll_readl(td, DFLL_MONITOR_DATA);
+ v = (v & DFLL_MONITOR_DATA_VAL_MASK) >> DFLL_MONITOR_DATA_VAL_SHIFT;
+ pre_scaler_rate = dfll_calc_monitored_rate(v, td->ref_rate);
+
+ s = dfll_readl(td, DFLL_FREQ_REQ);
+ s = (s & DFLL_FREQ_REQ_SCALE_MASK) >> DFLL_FREQ_REQ_SCALE_SHIFT;
+ post_scaler_rate = dfll_scale_dvco_rate(s, pre_scaler_rate);
+
+ return post_scaler_rate;
+}
static int attr_enable_get(void *data, u64 *val)
{
diff --git a/drivers/clk/tegra/clk-tegra-audio.c b/drivers/clk/tegra/clk-tegra-audio.c
index 11e3ad7ad7a3..e2bfa9b368f6 100644
--- a/drivers/clk/tegra/clk-tegra-audio.c
+++ b/drivers/clk/tegra/clk-tegra-audio.c
@@ -125,18 +125,29 @@ static struct tegra_audio2x_clk_initdata audio2x_clks[] = {
void __init tegra_audio_clk_init(void __iomem *clk_base,
void __iomem *pmc_base, struct tegra_clk *tegra_clks,
- struct tegra_clk_pll_params *pll_a_params)
+ struct tegra_audio_clk_info *audio_info,
+ unsigned int num_plls)
{
struct clk *clk;
struct clk **dt_clk;
int i;
- /* PLLA */
- dt_clk = tegra_lookup_dt_id(tegra_clk_pll_a, tegra_clks);
- if (dt_clk) {
- clk = tegra_clk_register_pll("pll_a", "pll_p_out1", clk_base,
- pmc_base, 0, pll_a_params, NULL);
- *dt_clk = clk;
+ if (!audio_info || num_plls < 1) {
+ pr_err("No audio data passed to tegra_audio_clk_init\n");
+ WARN_ON(1);
+ return;
+ }
+
+ for (i = 0; i < num_plls; i++) {
+ struct tegra_audio_clk_info *info = &audio_info[i];
+
+ dt_clk = tegra_lookup_dt_id(info->clk_id, tegra_clks);
+ if (dt_clk) {
+ clk = tegra_clk_register_pll(info->name, info->parent,
+ clk_base, pmc_base, 0, info->pll_params,
+ NULL);
+ *dt_clk = clk;
+ }
}
/* PLLA_OUT0 */
diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c
index db5871519bf5..b7d03e9add97 100644
--- a/drivers/clk/tegra/clk-tegra114.c
+++ b/drivers/clk/tegra/clk-tegra114.c
@@ -933,6 +933,10 @@ static u32 mux_pllm_pllc2_c_c3_pllp_plla_idx[] = {
[0] = 0, [1] = 1, [2] = 2, [3] = 3, [4] = 4, [5] = 6,
};
+static struct tegra_audio_clk_info tegra114_audio_plls[] = {
+ { "pll_a", &pll_a_params, tegra_clk_pll_a, "pll_p_out1" },
+};
+
static struct clk **clks;
static unsigned long osc_freq;
@@ -1481,7 +1485,9 @@ static void __init tegra114_clock_init(struct device_node *np)
tegra114_fixed_clk_init(clk_base);
tegra114_pll_init(clk_base, pmc_base);
tegra114_periph_clk_init(clk_base, pmc_base);
- tegra_audio_clk_init(clk_base, pmc_base, tegra114_clks, &pll_a_params);
+ tegra_audio_clk_init(clk_base, pmc_base, tegra114_clks,
+ tegra114_audio_plls,
+ ARRAY_SIZE(tegra114_audio_plls));
tegra_pmc_clk_init(pmc_base, tegra114_clks);
tegra_super_clk_gen4_init(clk_base, pmc_base, tegra114_clks,
&pll_x_params);
diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c
index 824d75883d2b..87975f7adddc 100644
--- a/drivers/clk/tegra/clk-tegra124.c
+++ b/drivers/clk/tegra/clk-tegra124.c
@@ -1417,6 +1417,10 @@ static struct tegra_clk_init_table tegra132_init_table[] __initdata = {
{TEGRA124_CLK_CLK_MAX, TEGRA124_CLK_CLK_MAX, 0, 0},
};
+static struct tegra_audio_clk_info tegra124_audio_plls[] = {
+ { "pll_a", &pll_a_params, tegra_clk_pll_a, "pll_p_out1" },
+};
+
/**
* tegra124_clock_apply_init_table - initialize clocks on Tegra124 SoCs
*
@@ -1555,7 +1559,9 @@ static void __init tegra124_132_clock_init_pre(struct device_node *np)
tegra_fixed_clk_init(tegra124_clks);
tegra124_pll_init(clk_base, pmc_base);
tegra124_periph_clk_init(clk_base, pmc_base);
- tegra_audio_clk_init(clk_base, pmc_base, tegra124_clks, &pll_a_params);
+ tegra_audio_clk_init(clk_base, pmc_base, tegra124_clks,
+ tegra124_audio_plls,
+ ARRAY_SIZE(tegra124_audio_plls));
tegra_pmc_clk_init(pmc_base, tegra124_clks);
/* For Tegra124 & Tegra132, PLLD is the only source for DSIA & DSIB */
diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
index fad561a5896b..b90db615c29e 100644
--- a/drivers/clk/tegra/clk-tegra30.c
+++ b/drivers/clk/tegra/clk-tegra30.c
@@ -1405,6 +1405,10 @@ static const struct of_device_id pmc_match[] __initconst = {
{},
};
+static struct tegra_audio_clk_info tegra30_audio_plls[] = {
+ { "pll_a", &pll_a_params, tegra_clk_pll_a, "pll_p_out1" },
+};
+
static void __init tegra30_clock_init(struct device_node *np)
{
struct device_node *node;
@@ -1442,7 +1446,9 @@ static void __init tegra30_clock_init(struct device_node *np)
tegra30_pll_init();
tegra30_super_clk_init();
tegra30_periph_clk_init();
- tegra_audio_clk_init(clk_base, pmc_base, tegra30_clks, &pll_a_params);
+ tegra_audio_clk_init(clk_base, pmc_base, tegra30_clks,
+ tegra30_audio_plls,
+ ARRAY_SIZE(tegra30_audio_plls));
tegra_pmc_clk_init(pmc_base, tegra30_clks);
tegra_init_dup_clks(tegra_clk_duplicates, clks, TEGRA30_CLK_CLK_MAX);
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
index 0621887e06f7..5d2678914160 100644
--- a/drivers/clk/tegra/clk.h
+++ b/drivers/clk/tegra/clk.h
@@ -157,7 +157,7 @@ struct div_nmp {
};
/**
- * struct clk_pll_params - PLL parameters
+ * struct tegra_clk_pll_params - PLL parameters
*
* @input_min: Minimum input frequency
* @input_max: Maximum input frequency
@@ -168,9 +168,45 @@ struct div_nmp {
* @base_reg: PLL base reg offset
* @misc_reg: PLL misc reg offset
* @lock_reg: PLL lock reg offset
- * @lock_bit_idx: Bit index for PLL lock status
+ * @lock_mask: Bitmask for PLL lock status
* @lock_enable_bit_idx: Bit index to enable PLL lock
+ * @iddq_reg: PLL IDDQ register offset
+ * @iddq_bit_idx: Bit index to enable PLL IDDQ
+ * @aux_reg: AUX register offset
+ * @dyn_ramp_reg: Dynamic ramp control register offset
+ * @ext_misc_reg: Miscellaneous control register offsets
+ * @pmc_divnm_reg: n, m divider PMC override register offset (PLLM)
+ * @pmc_divp_reg: p divider PMC override register offset (PLLM)
+ * @flags: PLL flags
+ * @stepa_shift: Dynamic ramp step A field shift
+ * @stepb_shift: Dynamic ramp step B field shift
* @lock_delay: Delay in us if PLL lock is not used
+ * @max_p: maximum value for the p divider
+ * @pdiv_tohw: mapping of p divider to register values
+ * @div_nmp: offsets and widths on n, m and p fields
+ * @freq_table: array of frequencies supported by PLL
+ * @fixed_rate: PLL rate if it is fixed
+ *
+ * Flags:
+ * TEGRA_PLL_USE_LOCK - This flag indicated to use lock bits for
+ * PLL locking. If not set it will use lock_delay value to wait.
+ * TEGRA_PLL_HAS_CPCON - This flag indicates that CPCON value needs
+ * to be programmed to change output frequency of the PLL.
+ * TEGRA_PLL_SET_LFCON - This flag indicates that LFCON value needs
+ * to be programmed to change output frequency of the PLL.
+ * TEGRA_PLL_SET_DCCON - This flag indicates that DCCON value needs
+ * to be programmed to change output frequency of the PLL.
+ * TEGRA_PLLU - PLLU has inverted post divider. This flags indicated
+ * that it is PLLU and invert post divider value.
+ * TEGRA_PLLM - PLLM has additional override settings in PMC. This
+ * flag indicates that it is PLLM and use override settings.
+ * TEGRA_PLL_FIXED - We are not supposed to change output frequency
+ * of some plls.
+ * TEGRA_PLLE_CONFIGURE - Configure PLLE when enabling.
+ * TEGRA_PLL_LOCK_MISC - Lock bit is in the misc register instead of the
+ * base register.
+ * TEGRA_PLL_BYPASS - PLL has bypass bit
+ * TEGRA_PLL_HAS_LOCK_ENABLE - PLL has bit to enable lock monitoring
*/
struct tegra_clk_pll_params {
unsigned long input_min;
@@ -203,38 +239,26 @@ struct tegra_clk_pll_params {
unsigned long fixed_rate;
};
+#define TEGRA_PLL_USE_LOCK BIT(0)
+#define TEGRA_PLL_HAS_CPCON BIT(1)
+#define TEGRA_PLL_SET_LFCON BIT(2)
+#define TEGRA_PLL_SET_DCCON BIT(3)
+#define TEGRA_PLLU BIT(4)
+#define TEGRA_PLLM BIT(5)
+#define TEGRA_PLL_FIXED BIT(6)
+#define TEGRA_PLLE_CONFIGURE BIT(7)
+#define TEGRA_PLL_LOCK_MISC BIT(8)
+#define TEGRA_PLL_BYPASS BIT(9)
+#define TEGRA_PLL_HAS_LOCK_ENABLE BIT(10)
+
/**
* struct tegra_clk_pll - Tegra PLL clock
*
* @hw: handle between common and hardware-specifix interfaces
* @clk_base: address of CAR controller
* @pmc: address of PMC, required to read override bits
- * @freq_table: array of frequencies supported by PLL
- * @params: PLL parameters
- * @flags: PLL flags
- * @fixed_rate: PLL rate if it is fixed
* @lock: register lock
- *
- * Flags:
- * TEGRA_PLL_USE_LOCK - This flag indicated to use lock bits for
- * PLL locking. If not set it will use lock_delay value to wait.
- * TEGRA_PLL_HAS_CPCON - This flag indicates that CPCON value needs
- * to be programmed to change output frequency of the PLL.
- * TEGRA_PLL_SET_LFCON - This flag indicates that LFCON value needs
- * to be programmed to change output frequency of the PLL.
- * TEGRA_PLL_SET_DCCON - This flag indicates that DCCON value needs
- * to be programmed to change output frequency of the PLL.
- * TEGRA_PLLU - PLLU has inverted post divider. This flags indicated
- * that it is PLLU and invert post divider value.
- * TEGRA_PLLM - PLLM has additional override settings in PMC. This
- * flag indicates that it is PLLM and use override settings.
- * TEGRA_PLL_FIXED - We are not supposed to change output frequency
- * of some plls.
- * TEGRA_PLLE_CONFIGURE - Configure PLLE when enabling.
- * TEGRA_PLL_LOCK_MISC - Lock bit is in the misc register instead of the
- * base register.
- * TEGRA_PLL_BYPASS - PLL has bypass bit
- * TEGRA_PLL_HAS_LOCK_ENABLE - PLL has bit to enable lock monitoring
+ * @params: PLL parameters
*/
struct tegra_clk_pll {
struct clk_hw hw;
@@ -246,17 +270,20 @@ struct tegra_clk_pll {
#define to_clk_pll(_hw) container_of(_hw, struct tegra_clk_pll, hw)
-#define TEGRA_PLL_USE_LOCK BIT(0)
-#define TEGRA_PLL_HAS_CPCON BIT(1)
-#define TEGRA_PLL_SET_LFCON BIT(2)
-#define TEGRA_PLL_SET_DCCON BIT(3)
-#define TEGRA_PLLU BIT(4)
-#define TEGRA_PLLM BIT(5)
-#define TEGRA_PLL_FIXED BIT(6)
-#define TEGRA_PLLE_CONFIGURE BIT(7)
-#define TEGRA_PLL_LOCK_MISC BIT(8)
-#define TEGRA_PLL_BYPASS BIT(9)
-#define TEGRA_PLL_HAS_LOCK_ENABLE BIT(10)
+/**
+ * struct tegra_audio_clk_info - Tegra Audio Clk Information
+ *
+ * @name: name for the audio pll
+ * @pll_params: pll_params for audio pll
+ * @clk_id: clk_ids for the audio pll
+ * @parent: name of the parent of the audio pll
+ */
+struct tegra_audio_clk_info {
+ char *name;
+ struct tegra_clk_pll_params *pll_params;
+ int clk_id;
+ char *parent;
+};
extern const struct clk_ops tegra_clk_pll_ops;
extern const struct clk_ops tegra_clk_plle_ops;
@@ -610,7 +637,8 @@ void tegra_register_devclks(struct tegra_devclk *dev_clks, int num);
void tegra_audio_clk_init(void __iomem *clk_base,
void __iomem *pmc_base, struct tegra_clk *tegra_clks,
- struct tegra_clk_pll_params *pll_params);
+ struct tegra_audio_clk_info *audio_info,
+ unsigned int num_plls);
void tegra_periph_clk_init(void __iomem *clk_base, void __iomem *pmc_base,
struct tegra_clk *tegra_clks,
diff --git a/drivers/clk/tegra/cvb.c b/drivers/clk/tegra/cvb.c
index 0204e0861134..69c74eec3a4b 100644
--- a/drivers/clk/tegra/cvb.c
+++ b/drivers/clk/tegra/cvb.c
@@ -78,13 +78,6 @@ static int build_opp_table(const struct cvb_table *d,
if (!table->freq || (table->freq > max_freq))
break;
- /*
- * FIXME after clk_round_rate/clk_determine_rate prototypes
- * have been updated
- */
- if (table->freq & (1<<31))
- continue;
-
dfll_mv = get_cvb_voltage(
speedo_value, d->speedo_scale, &table->coefficients);
dfll_mv = round_cvb_voltage(dfll_mv, d->voltage_scale, align);