aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/layerscape/patches-4.4/8026-cpufreq-qoriq-Don-t-look-at-clock-implementation-det.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/layerscape/patches-4.4/8026-cpufreq-qoriq-Don-t-look-at-clock-implementation-det.patch')
-rw-r--r--target/linux/layerscape/patches-4.4/8026-cpufreq-qoriq-Don-t-look-at-clock-implementation-det.patch274
1 files changed, 0 insertions, 274 deletions
diff --git a/target/linux/layerscape/patches-4.4/8026-cpufreq-qoriq-Don-t-look-at-clock-implementation-det.patch b/target/linux/layerscape/patches-4.4/8026-cpufreq-qoriq-Don-t-look-at-clock-implementation-det.patch
deleted file mode 100644
index e8cb061a54..0000000000
--- a/target/linux/layerscape/patches-4.4/8026-cpufreq-qoriq-Don-t-look-at-clock-implementation-det.patch
+++ /dev/null
@@ -1,274 +0,0 @@
-From 8f3768a7c649526f821a6a4cd32cc44a8e7fa317 Mon Sep 17 00:00:00 2001
-From: Scott Wood <scottwood@freescale.com>
-Date: Fri, 15 Jan 2016 07:34:33 +0000
-Subject: [PATCH 26/70] cpufreq: qoriq: Don't look at clock implementation
- details
-
-Get the CPU clock's potential parent clocks from the clock interface
-itself, rather than manually parsing the clocks property to find a
-phandle, looking at the clock-names property of that, and assuming that
-those are valid parent clocks for the cpu clock.
-
-This is necessary now that the clocks are generated based on the clock
-driver's knowledge of the chip rather than a fragile device-tree
-description of the mux options.
-
-We can now rely on the clock driver to ensure that the mux only exposes
-options that are valid. The cpufreq driver was currently being overly
-conservative in some cases -- for example, the "min_cpufreq =
-get_bus_freq()" restriction only applies to chips with erratum
-A-004510, and whether the freq_mask used on p5020 is needed depends on
-the actual frequencies of the PLLs (FWIW, p5040 has a similar
-limitation but its .freq_mask was zero) -- and the frequency mask
-mechanism made assumptions about particular parent clock indices that
-are no longer valid.
-
-Signed-off-by: Scott Wood <scottwood@freescale.com>
-Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
----
- drivers/cpufreq/qoriq-cpufreq.c | 138 ++++++++++++---------------------------
- 1 file changed, 41 insertions(+), 97 deletions(-)
-
---- a/drivers/cpufreq/qoriq-cpufreq.c
-+++ b/drivers/cpufreq/qoriq-cpufreq.c
-@@ -11,6 +11,7 @@
- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
- #include <linux/clk.h>
-+#include <linux/clk-provider.h>
- #include <linux/cpufreq.h>
- #include <linux/errno.h>
- #include <linux/init.h>
-@@ -35,53 +36,20 @@ struct cpu_data {
- struct cpufreq_frequency_table *table;
- };
-
-+/*
-+ * Don't use cpufreq on this SoC -- used when the SoC would have otherwise
-+ * matched a more generic compatible.
-+ */
-+#define SOC_BLACKLIST 1
-+
- /**
- * struct soc_data - SoC specific data
-- * @freq_mask: mask the disallowed frequencies
-- * @flag: unique flags
-+ * @flags: SOC_xxx
- */
- struct soc_data {
-- u32 freq_mask[4];
-- u32 flag;
--};
--
--#define FREQ_MASK 1
--/* see hardware specification for the allowed frqeuencies */
--static const struct soc_data sdata[] = {
-- { /* used by p2041 and p3041 */
-- .freq_mask = {0x8, 0x8, 0x2, 0x2},
-- .flag = FREQ_MASK,
-- },
-- { /* used by p5020 */
-- .freq_mask = {0x8, 0x2},
-- .flag = FREQ_MASK,
-- },
-- { /* used by p4080, p5040 */
-- .freq_mask = {0},
-- .flag = 0,
-- },
-+ u32 flags;
- };
-
--/*
-- * the minimum allowed core frequency, in Hz
-- * for chassis v1.0, >= platform frequency
-- * for chassis v2.0, >= platform frequency / 2
-- */
--static u32 min_cpufreq;
--static const u32 *fmask;
--
--#if defined(CONFIG_ARM)
--static int get_cpu_physical_id(int cpu)
--{
-- return topology_core_id(cpu);
--}
--#else
--static int get_cpu_physical_id(int cpu)
--{
-- return get_hard_smp_processor_id(cpu);
--}
--#endif
--
- static u32 get_bus_freq(void)
- {
- struct device_node *soc;
-@@ -99,9 +67,10 @@ static u32 get_bus_freq(void)
- return sysfreq;
- }
-
--static struct device_node *cpu_to_clk_node(int cpu)
-+static struct clk *cpu_to_clk(int cpu)
- {
-- struct device_node *np, *clk_np;
-+ struct device_node *np;
-+ struct clk *clk;
-
- if (!cpu_present(cpu))
- return NULL;
-@@ -110,37 +79,28 @@ static struct device_node *cpu_to_clk_no
- if (!np)
- return NULL;
-
-- clk_np = of_parse_phandle(np, "clocks", 0);
-- if (!clk_np)
-- return NULL;
--
-+ clk = of_clk_get(np, 0);
- of_node_put(np);
--
-- return clk_np;
-+ return clk;
- }
-
- /* traverse cpu nodes to get cpu mask of sharing clock wire */
- static void set_affected_cpus(struct cpufreq_policy *policy)
- {
-- struct device_node *np, *clk_np;
- struct cpumask *dstp = policy->cpus;
-+ struct clk *clk;
- int i;
-
-- np = cpu_to_clk_node(policy->cpu);
-- if (!np)
-- return;
--
- for_each_present_cpu(i) {
-- clk_np = cpu_to_clk_node(i);
-- if (!clk_np)
-+ clk = cpu_to_clk(i);
-+ if (IS_ERR(clk)) {
-+ pr_err("%s: no clock for cpu %d\n", __func__, i);
- continue;
-+ }
-
-- if (clk_np == np)
-+ if (clk_is_match(policy->clk, clk))
- cpumask_set_cpu(i, dstp);
--
-- of_node_put(clk_np);
- }
-- of_node_put(np);
- }
-
- /* reduce the duplicated frequencies in frequency table */
-@@ -198,7 +158,7 @@ static int qoriq_cpufreq_cpu_init(struct
- {
- struct device_node *np, *pnode;
- int i, count, ret;
-- u32 freq, mask;
-+ u32 freq;
- struct clk *clk;
- struct cpufreq_frequency_table *table;
- struct cpu_data *data;
-@@ -219,17 +179,12 @@ static int qoriq_cpufreq_cpu_init(struct
- goto err_nomem2;
- }
-
-- pnode = of_parse_phandle(np, "clocks", 0);
-- if (!pnode) {
-- pr_err("%s: could not get clock information\n", __func__);
-- goto err_nomem2;
-- }
-+ count = clk_get_num_parents(policy->clk);
-
-- count = of_property_count_strings(pnode, "clock-names");
- data->pclk = kcalloc(count, sizeof(struct clk *), GFP_KERNEL);
- if (!data->pclk) {
- pr_err("%s: no memory\n", __func__);
-- goto err_node;
-+ goto err_nomem2;
- }
-
- table = kcalloc(count + 1, sizeof(*table), GFP_KERNEL);
-@@ -238,23 +193,11 @@ static int qoriq_cpufreq_cpu_init(struct
- goto err_pclk;
- }
-
-- if (fmask)
-- mask = fmask[get_cpu_physical_id(cpu)];
-- else
-- mask = 0x0;
--
- for (i = 0; i < count; i++) {
-- clk = of_clk_get(pnode, i);
-+ clk = clk_get_parent_by_index(policy->clk, i);
- data->pclk[i] = clk;
- freq = clk_get_rate(clk);
-- /*
-- * the clock is valid if its frequency is not masked
-- * and large than minimum allowed frequency.
-- */
-- if (freq < min_cpufreq || (mask & (1 << i)))
-- table[i].frequency = CPUFREQ_ENTRY_INVALID;
-- else
-- table[i].frequency = freq / 1000;
-+ table[i].frequency = freq / 1000;
- table[i].driver_data = i;
- }
- freq_table_redup(table, count);
-@@ -288,10 +231,7 @@ err_nomem1:
- kfree(table);
- err_pclk:
- kfree(data->pclk);
--err_node:
-- of_node_put(pnode);
- err_nomem2:
-- policy->driver_data = NULL;
- kfree(data);
- err_np:
- of_node_put(np);
-@@ -332,12 +272,20 @@ static struct cpufreq_driver qoriq_cpufr
- .attr = cpufreq_generic_attr,
- };
-
-+static const struct soc_data blacklist = {
-+ .flags = SOC_BLACKLIST,
-+};
-+
- static const struct of_device_id node_matches[] __initconst = {
-- { .compatible = "fsl,p2041-clockgen", .data = &sdata[0], },
-- { .compatible = "fsl,p3041-clockgen", .data = &sdata[0], },
-- { .compatible = "fsl,p5020-clockgen", .data = &sdata[1], },
-- { .compatible = "fsl,p4080-clockgen", .data = &sdata[2], },
-- { .compatible = "fsl,p5040-clockgen", .data = &sdata[2], },
-+ /* e6500 cannot use cpufreq due to erratum A-008083 */
-+ { .compatible = "fsl,b4420-clockgen", &blacklist },
-+ { .compatible = "fsl,b4860-clockgen", &blacklist },
-+ { .compatible = "fsl,t2080-clockgen", &blacklist },
-+ { .compatible = "fsl,t4240-clockgen", &blacklist },
-+
-+ { .compatible = "fsl,ls1021a-clockgen", },
-+ { .compatible = "fsl,p4080-clockgen", },
-+ { .compatible = "fsl,qoriq-clockgen-1.0", },
- { .compatible = "fsl,qoriq-clockgen-2.0", },
- {}
- };
-@@ -355,16 +303,12 @@ static int __init qoriq_cpufreq_init(voi
-
- match = of_match_node(node_matches, np);
- data = match->data;
-- if (data) {
-- if (data->flag)
-- fmask = data->freq_mask;
-- min_cpufreq = get_bus_freq();
-- } else {
-- min_cpufreq = get_bus_freq() / 2;
-- }
-
- of_node_put(np);
-
-+ if (data && data->flags & SOC_BLACKLIST)
-+ return -ENODEV;
-+
- ret = cpufreq_register_driver(&qoriq_cpufreq_driver);
- if (!ret)
- pr_info("Freescale QorIQ CPU frequency scaling driver\n");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 13:11:22 +0000