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authorPeng Fan <peng.fan@nxp.com>2022-02-28 20:41:11 +0800
committerAbel Vesa <abel.vesa@nxp.com>2022-04-12 11:17:43 +0300
commit19565ea12d61c69ef2be97a97b426ba5c55572ff (patch)
tree8ba2366a7be9a8f5103037f2ac95db1e78bd7dc3 /drivers/clk
parentcdc86e473b353c8a026a337ee9fb9e1fbbe2276b (diff)
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clk: imx: add mcore_booted module paratemter
Add mcore_booted boot parameter which could simplify AMP clock management. To i.MX8M, there is CCM(clock control Module) to generate clock root clock, anatop(analog PLL module) to generate PLL, and CCGR (clock gating) to gate clocks to peripherals. As below: anatop->ccm->ccgr->peripheral Linux handles the clock management and the auxiliary core is under control of Linux. Although there is per hardware domain control for CCGR and CCM, auxiliary core normally only use CCGR hardware domain control to avoid linux gate off the clk to peripherals and leave CCM ana anatop to Linux. Per NXP hardware design, because CCGR already support gate to peripherals, and clk root gate power leakage is negligible. So when in AMP case, we could not register the clk root gate. Signed-off-by: Peng Fan <peng.fan@nxp.com> Reviewed-by: Abel Vesa <abel.vesa@nxp.com> Link: https://lore.kernel.org/r/20220228124112.3974242-1-peng.fan@oss.nxp.com Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/imx/clk-imx8mm.c2
-rw-r--r--drivers/clk/imx/clk-imx8mn.c2
-rw-r--r--drivers/clk/imx/clk-imx8mp.c2
-rw-r--r--drivers/clk/imx/clk-imx8mq.c2
-rw-r--r--drivers/clk/imx/clk.c3
-rw-r--r--drivers/clk/imx/clk.h1
6 files changed, 12 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
index e8cbe181ec06..a452fd1bb891 100644
--- a/drivers/clk/imx/clk-imx8mm.c
+++ b/drivers/clk/imx/clk-imx8mm.c
@@ -639,6 +639,8 @@ static struct platform_driver imx8mm_clk_driver = {
},
};
module_platform_driver(imx8mm_clk_driver);
+module_param(mcore_booted, bool, S_IRUGO);
+MODULE_PARM_DESC(mcore_booted, "See Cortex-M core is booted or not");
MODULE_AUTHOR("Bai Ping <ping.bai@nxp.com>");
MODULE_DESCRIPTION("NXP i.MX8MM clock driver");
diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
index 92fcbab4f5be..dc69b7464b3d 100644
--- a/drivers/clk/imx/clk-imx8mn.c
+++ b/drivers/clk/imx/clk-imx8mn.c
@@ -594,6 +594,8 @@ static struct platform_driver imx8mn_clk_driver = {
},
};
module_platform_driver(imx8mn_clk_driver);
+module_param(mcore_booted, bool, S_IRUGO);
+MODULE_PARM_DESC(mcore_booted, "See Cortex-M core is booted or not");
MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>");
MODULE_DESCRIPTION("NXP i.MX8MN clock driver");
diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c
index 18f5b7c3ca9d..250e45d9f844 100644
--- a/drivers/clk/imx/clk-imx8mp.c
+++ b/drivers/clk/imx/clk-imx8mp.c
@@ -721,6 +721,8 @@ static struct platform_driver imx8mp_clk_driver = {
},
};
module_platform_driver(imx8mp_clk_driver);
+module_param(mcore_booted, bool, S_IRUGO);
+MODULE_PARM_DESC(mcore_booted, "See Cortex-M core is booted or not");
MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>");
MODULE_DESCRIPTION("NXP i.MX8MP clock driver");
diff --git a/drivers/clk/imx/clk-imx8mq.c b/drivers/clk/imx/clk-imx8mq.c
index a9e69b6355ed..9f57b06b143c 100644
--- a/drivers/clk/imx/clk-imx8mq.c
+++ b/drivers/clk/imx/clk-imx8mq.c
@@ -632,6 +632,8 @@ static struct platform_driver imx8mq_clk_driver = {
},
};
module_platform_driver(imx8mq_clk_driver);
+module_param(mcore_booted, bool, S_IRUGO);
+MODULE_PARM_DESC(mcore_booted, "See Cortex-M core is booted or not");
MODULE_AUTHOR("Abel Vesa <abel.vesa@nxp.com>");
MODULE_DESCRIPTION("NXP i.MX8MQ clock driver");
diff --git a/drivers/clk/imx/clk.c b/drivers/clk/imx/clk.c
index 7cc669934253..4bd6ad060eea 100644
--- a/drivers/clk/imx/clk.c
+++ b/drivers/clk/imx/clk.c
@@ -17,6 +17,9 @@
DEFINE_SPINLOCK(imx_ccm_lock);
EXPORT_SYMBOL_GPL(imx_ccm_lock);
+bool mcore_booted;
+EXPORT_SYMBOL_GPL(mcore_booted);
+
void imx_unregister_clocks(struct clk *clks[], unsigned int count)
{
unsigned int i;
diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index a7cbbcd1a3f4..5061a06468df 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -7,6 +7,7 @@
#include <linux/clk-provider.h>
extern spinlock_t imx_ccm_lock;
+extern bool mcore_booted;
void imx_check_clocks(struct clk *clks[], unsigned int count);
void imx_check_clk_hws(struct clk_hw *clks[], unsigned int count);