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authorAngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>2021-07-29 18:56:05 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2021-09-22 01:41:48 +0300
commit60f3692b5f0b3e1df3ccc07c28758379052d0ab6 (patch)
treeda35b9101ce3a4322390b8b2fd9f2b78011f58dc /include/soc
parentb03543067a88879169ebfdfdb36d9e8e827eeb6d (diff)
downloadlinux-60f3692b5f0b3e1df3ccc07c28758379052d0ab6.tar.xz
cpuidle: qcom_spm: Detach state machine from main SPM handling
In commit a871be6b8eee ("cpuidle: Convert Qualcomm SPM driver to a generic CPUidle driver") the SPM driver has been converted to a generic CPUidle driver: that was mainly made to simplify the driver and that was a great accomplishment; Though, at that time, this driver was only applicable to ARM 32-bit SoCs, lacking logic about the handling of newer generation SAW. In preparation for the enablement of SPM features on AArch64/ARM64, split the cpuidle-qcom-spm driver in two: the CPUIdle related state machine (currently used only on ARM SoCs) stays there, while the SPM communication handling lands back in soc/qcom/spm.c and also making sure to not discard the simplifications that were introduced in the aforementioned commit. Since now the "two drivers" are split, the SCM dependency in the main SPM handling is gone and for this reason it was also possible to move the SPM initialization early: this will also make sure that whenever the SAW CPUIdle driver is getting initialized, the SPM driver will be ready to do the job. Please note that the anticipation of the SPM initialization was also done to optimize the boot times on platforms that have their CPU/L2 idle states managed by other means (such as PSCI), while needing SAW initialization for other purposes, like AVS control. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org> Reviewed-by: Stephan Gerhold <stephan@gerhold.net> Tested-by: Stephan Gerhold <stephan@gerhold.net> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20210729155609.608159-2-angelogioacchino.delregno@somainline.org
Diffstat (limited to 'include/soc')
-rw-r--r--include/soc/qcom/spm.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/include/soc/qcom/spm.h b/include/soc/qcom/spm.h
new file mode 100644
index 000000000000..4c7e5ac2583d
--- /dev/null
+++ b/include/soc/qcom/spm.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014,2015, Linaro Ltd.
+ */
+
+#ifndef __SPM_H__
+#define __SPM_H__
+
+#include <linux/cpuidle.h>
+
+#define MAX_PMIC_DATA 2
+#define MAX_SEQ_DATA 64
+
+enum pm_sleep_mode {
+ PM_SLEEP_MODE_STBY,
+ PM_SLEEP_MODE_RET,
+ PM_SLEEP_MODE_SPC,
+ PM_SLEEP_MODE_PC,
+ PM_SLEEP_MODE_NR,
+};
+
+struct spm_reg_data {
+ const u8 *reg_offset;
+ u32 spm_cfg;
+ u32 spm_dly;
+ u32 pmic_dly;
+ u32 pmic_data[MAX_PMIC_DATA];
+ u8 seq[MAX_SEQ_DATA];
+ u8 start_index[PM_SLEEP_MODE_NR];
+};
+
+struct spm_driver_data {
+ void __iomem *reg_base;
+ const struct spm_reg_data *reg_data;
+};
+
+void spm_set_low_power_mode(struct spm_driver_data *drv,
+ enum pm_sleep_mode mode);
+
+#endif /* __SPM_H__ */