The pvs refuse check is incorrect... With downstream it says it isn't
blown and that it is 11, which also happens on upstream if I import it's
efuse reading code from an older revision, or comment out the check.
Also, I'm still getting my issue about clocks above 2,147,483,647hz
however I think this may be related to the division in the hfpll driver
so I'll have a debug around there.
On Tue, Jun 19, 2018 at 07:15:24PM +0530, Sricharan R wrote:
> From: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
>
> Register a cpufreq-generic device whenever we detect that a
> "qcom,krait" compatible CPU is present in DT.
>
> Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> [Sricharan: updated to use dev_pm_opp_set_prop_name and
> nvmem apis]
> Signed-off-by: Sricharan R <sricharan@xxxxxxxxxxxxxx>
> [Thierry Escande: update to add support for opp-supported-hw]
> Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxx>
> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> ---
> [v10] updated to add support for opp-supported-hw given by
> Thierry Escande <thierry.escande@xxxxxxxxxx>
>
> drivers/cpufreq/Kconfig.arm | 10 ++
> drivers/cpufreq/Makefile | 1 +
> drivers/cpufreq/cpufreq-dt-platdev.c | 5 +
> drivers/cpufreq/qcom-cpufreq.c | 201 +++++++++++++++++++++++++++++++++++
> 4 files changed, 217 insertions(+)
> create mode 100644 drivers/cpufreq/qcom-cpufreq.c
>
> diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
> index 7f56fe5..87e5d8d 100644
> --- a/drivers/cpufreq/Kconfig.arm
> +++ b/drivers/cpufreq/Kconfig.arm
> @@ -134,6 +134,16 @@ config ARM_OMAP2PLUS_CPUFREQ
> depends on ARCH_OMAP2PLUS
> default ARCH_OMAP2PLUS
>
> +config ARM_QCOM_CPUFREQ
> + bool "CPUfreq driver for the QCOM SoCs with KRAIT processors"
> + depends on ARCH_QCOM
> + select PM_OPP
> + help
> + This enables the CPUFreq driver for Qualcomm SoCs with
> + KRAIT processors.
> +
> + If in doubt, say N.
> +
> config ARM_S3C_CPUFREQ
> bool
> help
> diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
> index 8d24ade..c591e1e 100644
> --- a/drivers/cpufreq/Makefile
> +++ b/drivers/cpufreq/Makefile
> @@ -65,6 +65,7 @@ obj-$(CONFIG_MACH_MVEBU_V7) += mvebu-cpufreq.o
> obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o
> obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
> obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
> +obj-$(CONFIG_ARM_QCOM_CPUFREQ) += qcom-cpufreq.o
> obj-$(CONFIG_ARM_S3C2410_CPUFREQ) += s3c2410-cpufreq.o
> obj-$(CONFIG_ARM_S3C2412_CPUFREQ) += s3c2412-cpufreq.o
> obj-$(CONFIG_ARM_S3C2416_CPUFREQ) += s3c2416-cpufreq.o
> diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
> index 3b585e4..e2e9a99 100644
> --- a/drivers/cpufreq/cpufreq-dt-platdev.c
> +++ b/drivers/cpufreq/cpufreq-dt-platdev.c
> @@ -127,6 +127,11 @@
> { .compatible = "ti,am43", },
> { .compatible = "ti,dra7", },
>
> + { .compatible = "qcom,ipq8064", },
> + { .compatible = "qcom,apq8064", },
> + { .compatible = "qcom,msm8974", },
> + { .compatible = "qcom,msm8960", },
> +
> { }
> };
>
> diff --git a/drivers/cpufreq/qcom-cpufreq.c b/drivers/cpufreq/qcom-cpufreq.c
> new file mode 100644
> index 0000000..1d4ab54
> --- /dev/null
> +++ b/drivers/cpufreq/qcom-cpufreq.c
> @@ -0,0 +1,201 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// Copyright (c) 2018, The Linux Foundation. All rights reserved.
> +
> +#include <linux/cpu.h>
> +#include <linux/module.h>
> +#include <linux/nvmem-consumer.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_opp.h>
> +#include <linux/slab.h>
> +
> +static void __init get_krait_bin_format_a(int *speed, int *pvs, int *pvs_ver,
> + struct nvmem_cell *pvs_nvmem, u8 *buf)
> +{
> + u32 pte_efuse;
> +
> + pte_efuse = *((u32 *)buf);
> +
> + *speed = pte_efuse & 0xf;
> + if (*speed == 0xf)
> + *speed = (pte_efuse >> 4) & 0xf;
> +
> + if (*speed == 0xf) {
> + *speed = 0;
> + pr_warn("Speed bin: Defaulting to %d\n", *speed);
> + } else {
> + pr_info("Speed bin: %d\n", *speed);
> + }
> +
> + *pvs = (pte_efuse >> 10) & 0x7;
> + if (*pvs == 0x7)
> + *pvs = (pte_efuse >> 13) & 0x7;
> +
> + if (*pvs == 0x7) {
> + *pvs = 0;
> + pr_warn("PVS bin: Defaulting to %d\n", *pvs);
> + } else {
> + pr_info("PVS bin: %d\n", *pvs);
> + }
> +
> + kfree(buf);
> +}
> +
> +static void __init get_krait_bin_format_b(int *speed, int *pvs, int *pvs_ver,
> + struct nvmem_cell *pvs_nvmem, u8 *buf)
> +{
> + u32 pte_efuse, redundant_sel;
> +
> + pte_efuse = *((u32 *)buf);
> + redundant_sel = (pte_efuse >> 24) & 0x7;
> + *speed = pte_efuse & 0x7;
> +
> + /* 4 bits of PVS are in efuse register bits 31, 8-6. */
> + *pvs = ((pte_efuse >> 28) & 0x8) | ((pte_efuse >> 6) & 0x7);
> + *pvs_ver = (pte_efuse >> 4) & 0x3;
> +
> + switch (redundant_sel) {
> + case 1:
> + *speed = (pte_efuse >> 27) & 0xf;
> + break;
> + case 2:
> + *pvs = (pte_efuse >> 27) & 0xf;
> + break;
> + }
> +
> + /* Check SPEED_BIN_BLOW_STATUS */
> + if (pte_efuse & BIT(3)) {
> + pr_info("Speed bin: %d\n", *speed);
> + } else {
> + pr_warn("Speed bin not set. Defaulting to 0!\n");
> + *speed = 0;
> + }
> +
> + /* Check PVS_BLOW_STATUS */
> + pte_efuse = *(((u32 *)buf) + 4);
> + if (pte_efuse) {
> + pr_info("PVS bin: %d\n", *pvs);
> + } else {
> + pr_warn("PVS bin not set. Defaulting to 0!\n");
> + *pvs = 0;
> + }
> +
> + pr_info("PVS version: %d\n", *pvs_ver);
> + kfree(buf);
> +}
> +
> +static int __init qcom_cpufreq_populate_opps(struct nvmem_cell *pvs_nvmem,
> + struct opp_table **tbl1,
> + struct opp_table **tbl2)
> +{
> + int speed = 0, pvs = 0, pvs_ver = 0, cpu, ret;
> + struct device *cpu_dev;
> + u8 *buf;
> + size_t len;
> + char pvs_name[] = "speedXX-pvsXX-vXX";
> + u32 hw_version;
> +
> + buf = nvmem_cell_read(pvs_nvmem, &len);
> + if (len == 4)
> + get_krait_bin_format_a(&speed, &pvs, &pvs_ver, pvs_nvmem, buf);
> + else if (len == 8)
> + get_krait_bin_format_b(&speed, &pvs, &pvs_ver, pvs_nvmem, buf);
> + else
> + pr_warn("Unable to read nvmem data. Defaulting to 0!\n");
> +
> + snprintf(pvs_name, sizeof(pvs_name), "speed%d-pvs%d-v%d",
> + speed, pvs, pvs_ver);
> +
> + hw_version = (1 << speed);
> +
> + for (cpu = 0; cpu < num_possible_cpus(); cpu++) {
> + cpu_dev = get_cpu_device(cpu);
> + if (!cpu_dev)
> + return -ENODEV;
> +
> + tbl1[cpu] = dev_pm_opp_set_prop_name(cpu_dev, pvs_name);
> + if (IS_ERR(tbl1[cpu])) {
> + ret = PTR_ERR(tbl1[cpu]);
> + tbl1[cpu] = 0;
> + pr_warn("failed to add OPP name %s\n", pvs_name);
> + return ret;
> + }
> +
> + tbl2[cpu] = dev_pm_opp_set_supported_hw(cpu_dev, &hw_version,
> + 1);
> + if (IS_ERR(tbl2[cpu])) {
> + ret = PTR_ERR(tbl2[cpu]);
> + tbl2[cpu] = 0;
> + pr_warn("failed to set supported hw version\n");
> + return ret;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int __init qcom_cpufreq_driver_init(void)
> +{
> + struct platform_device *pdev;
> + struct device *cpu_dev;
> + struct device_node *np;
> + struct nvmem_cell *pvs_nvmem;
> + struct opp_table *tbl1[NR_CPUS] = { NULL }, *tbl2[NR_CPUS] = { NULL };
> + int ret, cpu = 0;
> +
> + cpu_dev = get_cpu_device(0);
> + if (!cpu_dev)
> + return -ENODEV;
> +
> + np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
> + if (!np)
> + return -ENOENT;
> +
> + if (!of_device_is_compatible(np, "operating-points-v2-krait-cpu")) {
> + ret = -ENOENT;
> + goto free_np;
> + }
> +
> + pvs_nvmem = of_nvmem_cell_get(np, NULL);
> + if (IS_ERR(pvs_nvmem)) {
> + dev_err(cpu_dev, "Could not get nvmem cell\n");
> + ret = PTR_ERR(pvs_nvmem);
> + goto free_np;
> + }
> +
> + ret = qcom_cpufreq_populate_opps(pvs_nvmem, tbl1, tbl2);
> + if (ret)
> + goto free_opp_name;
> +
> + pdev = platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
> + if (IS_ERR(pdev)) {
> + ret = PTR_ERR(pdev);
> + goto free_opp_name;
> + }
> +
> + of_node_put(np);
> +
> + return 0;
> +
> +free_opp_name:
> + while (tbl1[cpu]) {
> + dev_pm_opp_put_prop_name(tbl1[cpu]);
> + cpu++;
> + }
> +
> + cpu = 0;
> + while (tbl2[cpu]) {
> + dev_pm_opp_put_supported_hw(tbl2[cpu]);
> + cpu++;
> + }
> +
> +free_np:
> + of_node_put(np);
> +
> + return ret;
> +}
> +late_initcall(qcom_cpufreq_driver_init);
> +
> +MODULE_DESCRIPTION("Qualcomm CPUfreq driver");
> +MODULE_AUTHOR("Stephen Boyd <sboyd@xxxxxxxxxxxxxx>");
> +MODULE_LICENSE("GPL v2");
> --
> 1.9.1
>
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