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authorLinus Torvalds <torvalds@linux-foundation.org>2021-02-21 05:42:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-21 05:42:28 +0300
commite767b3530acbf651593e3d357fe1168a024d8061 (patch)
tree0f549bbb4cf187661416f672dd0329c59b7a8fee /drivers/clk/tegra
parent82851fce6107d5a3e66d95aee2ae68860a732703 (diff)
parent4f79a8b06fccec3dd68935db5a4662435c472abf (diff)
downloadlinux-e767b3530acbf651593e3d357fe1168a024d8061.tar.xz
Merge tag 'arm-drivers-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC driver updates from Arnd Bergmann: "Updates for SoC specific drivers include a few subsystems that have their own maintainers but send them through the soc tree: SCMI firmware: - add support for a completion interrupt Reset controllers: - new driver for BCM4908 - new devm_reset_control_get_optional_exclusive_released() function Memory controllers: - Renesas RZ/G2 support - Tegra124 interconnect support - Allow more drivers to be loadable modules TEE/optee firmware: - minor code cleanup The other half of this is SoC specific drivers that do not belong into any other subsystem, most of them living in drivers/soc: - Allwinner/sunxi power management work - Allwinner H616 support - ASpeed AST2600 system identification support - AT91 SAMA7G5 SoC ID driver - AT91 SoC driver cleanups - Broadcom BCM4908 power management bus support - Marvell mbus cleanups - Mediatek MT8167 power domain support - Qualcomm socinfo driver support for PMIC - Qualcomm SoC identification for many more products - TI Keystone driver cleanups for PRUSS and elsewhere" * tag 'arm-drivers-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (89 commits) soc: aspeed: socinfo: Add new systems soc: aspeed: snoop: Add clock control logic memory: tegra186-emc: Replace DEFINE_SIMPLE_ATTRIBUTE with DEFINE_DEBUGFS_ATTRIBUTE memory: samsung: exynos5422-dmc: Correct function names in kerneldoc memory: ti-emif-pm: Drop of_match_ptr from of_device_id table optee: simplify i2c access drivers: soc: atmel: fix type for same7 tee: optee: remove need_resched() before cond_resched() soc: qcom: ocmem: don't return NULL in of_get_ocmem optee: sync OP-TEE headers tee: optee: fix 'physical' typos drivers: optee: use flexible-array member instead of zero-length array tee: fix some comment typos in header files soc: ti: k3-ringacc: Use of_device_get_match_data() soc: ti: pruss: Refactor the CFG sub-module init soc: mediatek: pm-domains: Don't print an error if child domain is deferred soc: mediatek: pm-domains: Add domain regulator supply dt-bindings: power: Add domain regulator supply soc: mediatek: cmdq: Remove cmdq_pkt_flush() soc: mediatek: pm-domains: Add support for mt8167 ...
Diffstat (limited to 'drivers/clk/tegra')
-rw-r--r--drivers/clk/tegra/Kconfig3
-rw-r--r--drivers/clk/tegra/Makefile2
-rw-r--r--drivers/clk/tegra/clk-tegra124-emc.c41
-rw-r--r--drivers/clk/tegra/clk-tegra124.c26
-rw-r--r--drivers/clk/tegra/clk.h18
5 files changed, 75 insertions, 15 deletions
diff --git a/drivers/clk/tegra/Kconfig b/drivers/clk/tegra/Kconfig
index deaa4605824c..90df619dc087 100644
--- a/drivers/clk/tegra/Kconfig
+++ b/drivers/clk/tegra/Kconfig
@@ -7,3 +7,6 @@ config TEGRA_CLK_DFLL
depends on ARCH_TEGRA_124_SOC || ARCH_TEGRA_210_SOC
select PM_OPP
def_bool y
+
+config TEGRA124_CLK_EMC
+ bool
diff --git a/drivers/clk/tegra/Makefile b/drivers/clk/tegra/Makefile
index eec2313fd37e..7b1816856eb5 100644
--- a/drivers/clk/tegra/Makefile
+++ b/drivers/clk/tegra/Makefile
@@ -22,7 +22,7 @@ obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += clk-tegra20-emc.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += clk-tegra114.o
obj-$(CONFIG_ARCH_TEGRA_124_SOC) += clk-tegra124.o
obj-$(CONFIG_TEGRA_CLK_DFLL) += clk-tegra124-dfll-fcpu.o
-obj-$(CONFIG_TEGRA124_EMC) += clk-tegra124-emc.o
+obj-$(CONFIG_TEGRA124_CLK_EMC) += clk-tegra124-emc.o
obj-$(CONFIG_ARCH_TEGRA_132_SOC) += clk-tegra124.o
obj-y += cvb.o
obj-$(CONFIG_ARCH_TEGRA_210_SOC) += clk-tegra210.o
diff --git a/drivers/clk/tegra/clk-tegra124-emc.c b/drivers/clk/tegra/clk-tegra124-emc.c
index 745f9faa98d8..bdf6f4a51617 100644
--- a/drivers/clk/tegra/clk-tegra124-emc.c
+++ b/drivers/clk/tegra/clk-tegra124-emc.c
@@ -11,7 +11,9 @@
#include <linux/clk-provider.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
+#include <linux/clk/tegra.h>
#include <linux/delay.h>
+#include <linux/export.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
@@ -21,7 +23,6 @@
#include <linux/string.h>
#include <soc/tegra/fuse.h>
-#include <soc/tegra/emc.h>
#include "clk.h"
@@ -80,6 +81,9 @@ struct tegra_clk_emc {
int num_timings;
struct emc_timing *timings;
spinlock_t *lock;
+
+ tegra124_emc_prepare_timing_change_cb *prepare_timing_change;
+ tegra124_emc_complete_timing_change_cb *complete_timing_change;
};
/* Common clock framework callback implementations */
@@ -176,6 +180,9 @@ static struct tegra_emc *emc_ensure_emc_driver(struct tegra_clk_emc *tegra)
if (tegra->emc)
return tegra->emc;
+ if (!tegra->prepare_timing_change || !tegra->complete_timing_change)
+ return NULL;
+
if (!tegra->emc_node)
return NULL;
@@ -241,7 +248,7 @@ static int emc_set_timing(struct tegra_clk_emc *tegra,
div = timing->parent_rate / (timing->rate / 2) - 2;
- err = tegra_emc_prepare_timing_change(emc, timing->rate);
+ err = tegra->prepare_timing_change(emc, timing->rate);
if (err)
return err;
@@ -259,7 +266,7 @@ static int emc_set_timing(struct tegra_clk_emc *tegra,
spin_unlock_irqrestore(tegra->lock, flags);
- tegra_emc_complete_timing_change(emc, timing->rate);
+ tegra->complete_timing_change(emc, timing->rate);
clk_hw_reparent(&tegra->hw, __clk_get_hw(timing->parent));
clk_disable_unprepare(tegra->prev_parent);
@@ -473,8 +480,8 @@ static const struct clk_ops tegra_clk_emc_ops = {
.get_parent = emc_get_parent,
};
-struct clk *tegra_clk_register_emc(void __iomem *base, struct device_node *np,
- spinlock_t *lock)
+struct clk *tegra124_clk_register_emc(void __iomem *base, struct device_node *np,
+ spinlock_t *lock)
{
struct tegra_clk_emc *tegra;
struct clk_init_data init;
@@ -538,3 +545,27 @@ struct clk *tegra_clk_register_emc(void __iomem *base, struct device_node *np,
return clk;
};
+
+void tegra124_clk_set_emc_callbacks(tegra124_emc_prepare_timing_change_cb *prep_cb,
+ tegra124_emc_complete_timing_change_cb *complete_cb)
+{
+ struct clk *clk = __clk_lookup("emc");
+ struct tegra_clk_emc *tegra;
+ struct clk_hw *hw;
+
+ if (clk) {
+ hw = __clk_get_hw(clk);
+ tegra = container_of(hw, struct tegra_clk_emc, hw);
+
+ tegra->prepare_timing_change = prep_cb;
+ tegra->complete_timing_change = complete_cb;
+ }
+}
+EXPORT_SYMBOL_GPL(tegra124_clk_set_emc_callbacks);
+
+bool tegra124_clk_emc_driver_available(struct clk_hw *hw)
+{
+ struct tegra_clk_emc *tegra = container_of(hw, struct tegra_clk_emc, hw);
+
+ return tegra->prepare_timing_change && tegra->complete_timing_change;
+}
diff --git a/drivers/clk/tegra/clk-tegra124.c b/drivers/clk/tegra/clk-tegra124.c
index e931319dcc9d..934520aab6e3 100644
--- a/drivers/clk/tegra/clk-tegra124.c
+++ b/drivers/clk/tegra/clk-tegra124.c
@@ -1500,6 +1500,26 @@ static void __init tegra124_132_clock_init_pre(struct device_node *np)
writel(plld_base, clk_base + PLLD_BASE);
}
+static struct clk *tegra124_clk_src_onecell_get(struct of_phandle_args *clkspec,
+ void *data)
+{
+ struct clk_hw *hw;
+ struct clk *clk;
+
+ clk = of_clk_src_onecell_get(clkspec, data);
+ if (IS_ERR(clk))
+ return clk;
+
+ hw = __clk_get_hw(clk);
+
+ if (clkspec->args[0] == TEGRA124_CLK_EMC) {
+ if (!tegra124_clk_emc_driver_available(hw))
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ return clk;
+}
+
/**
* tegra124_132_clock_init_post - clock initialization postamble for T124/T132
* @np: struct device_node * of the DT node for the SoC CAR IP block
@@ -1516,10 +1536,10 @@ static void __init tegra124_132_clock_init_post(struct device_node *np)
&pll_x_params);
tegra_init_special_resets(1, tegra124_reset_assert,
tegra124_reset_deassert);
- tegra_add_of_provider(np, of_clk_src_onecell_get);
+ tegra_add_of_provider(np, tegra124_clk_src_onecell_get);
- clks[TEGRA124_CLK_EMC] = tegra_clk_register_emc(clk_base, np,
- &emc_lock);
+ clks[TEGRA124_CLK_EMC] = tegra124_clk_register_emc(clk_base, np,
+ &emc_lock);
tegra_register_devclks(devclks, ARRAY_SIZE(devclks));
diff --git a/drivers/clk/tegra/clk.h b/drivers/clk/tegra/clk.h
index 6b565f6b5f66..c3e36b5dcc75 100644
--- a/drivers/clk/tegra/clk.h
+++ b/drivers/clk/tegra/clk.h
@@ -881,16 +881,22 @@ void tegra_super_clk_gen5_init(void __iomem *clk_base,
void __iomem *pmc_base, struct tegra_clk *tegra_clks,
struct tegra_clk_pll_params *pll_params);
-#ifdef CONFIG_TEGRA124_EMC
-struct clk *tegra_clk_register_emc(void __iomem *base, struct device_node *np,
- spinlock_t *lock);
+#ifdef CONFIG_TEGRA124_CLK_EMC
+struct clk *tegra124_clk_register_emc(void __iomem *base, struct device_node *np,
+ spinlock_t *lock);
+bool tegra124_clk_emc_driver_available(struct clk_hw *emc_hw);
#else
-static inline struct clk *tegra_clk_register_emc(void __iomem *base,
- struct device_node *np,
- spinlock_t *lock)
+static inline struct clk *
+tegra124_clk_register_emc(void __iomem *base, struct device_node *np,
+ spinlock_t *lock)
{
return NULL;
}
+
+static inline bool tegra124_clk_emc_driver_available(struct clk_hw *emc_hw)
+{
+ return false;
+}
#endif
void tegra114_clock_tune_cpu_trimmers_high(void);