[PATCH 1/2] clk: imx8mm: Mark dram_apb critical

[PATCH 1/2] clk: imx8mm: Mark dram_apb critical

[Leonard Crestez]

This clock is used for dram operations inside TF-A and must be kept
enabled for features such as suspend/resume dram retention and busfreq
to work.

This is required for imx8mm suspend to work with NXP branch of TF-A.
There is an equivalent clk on imx8mq and it's always been marked as
critical in upstream.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
---
 drivers/clk/imx/clk-imx8mm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
index 1ef8438e3d6d..fbb61c2f12d0 100644
--- a/drivers/clk/imx/clk-imx8mm.c
+++ b/drivers/clk/imx/clk-imx8mm.c
@@ -521,11 +521,11 @@ static int __init imx8mm_clocks_init(struct device_node *ccm_node)
 	clks[IMX8MM_CLK_IPG_ROOT] = imx_clk_divider2("ipg_root", "ahb", base + 0x9080, 0, 1);
 	clks[IMX8MM_CLK_IPG_AUDIO_ROOT] = imx_clk_divider2("ipg_audio_root", "audio_ahb", base + 0x9180, 0, 1);
 
 	/* IP */
 	clks[IMX8MM_CLK_DRAM_ALT] = imx8m_clk_composite("dram_alt", imx8mm_dram_alt_sels, base + 0xa000);
-	clks[IMX8MM_CLK_DRAM_APB] = imx8m_clk_composite("dram_apb", imx8mm_dram_apb_sels, base + 0xa080);
+	clks[IMX8MM_CLK_DRAM_APB] = imx8m_clk_composite_critical("dram_apb", imx8mm_dram_apb_sels, base + 0xa080);
 	clks[IMX8MM_CLK_VPU_G1] = imx8m_clk_composite("vpu_g1", imx8mm_vpu_g1_sels, base + 0xa100);
 	clks[IMX8MM_CLK_VPU_G2] = imx8m_clk_composite("vpu_g2", imx8mm_vpu_g2_sels, base + 0xa180);
 	clks[IMX8MM_CLK_DISP_DTRC] = imx8m_clk_composite("disp_dtrc", imx8mm_disp_dtrc_sels, base + 0xa200);
 	clks[IMX8MM_CLK_DISP_DC8000] = imx8m_clk_composite("disp_dc8000", imx8mm_disp_dc8000_sels, base + 0xa280);
 	clks[IMX8MM_CLK_PCIE1_CTRL] = imx8m_clk_composite("pcie1_ctrl", imx8mm_pcie1_ctrl_sels, base + 0xa300);
-- 
2.17.1


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[PATCH 2/2] clk: imx8mm: Add gic clk

[Leonard Crestez]

This is documented in the reference manual as GIC_CLK_ROOT.

In some out-of-tree DVFS the gic clock can end up as the only user of
sys_pll2 so if we don't define the gic clk explicitly it might be turned
off.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>

---
I'm not sure adding clks from the reference manual needs justification.
---
 drivers/clk/imx/clk-imx8mm.c             | 4 ++++
 include/dt-bindings/clock/imx8mm-clock.h | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
index fbb61c2f12d0..8b2f0013639d 100644
--- a/drivers/clk/imx/clk-imx8mm.c
+++ b/drivers/clk/imx/clk-imx8mm.c
@@ -286,10 +286,13 @@ static const char *imx8mm_usb_core_sels[] = {"osc_24m", "sys_pll1_100m", "sys_pl
 					     "sys_pll2_200m", "clk_ext2", "clk_ext3", "audio_pll2_out", };
 
 static const char *imx8mm_usb_phy_sels[] = {"osc_24m", "sys_pll1_100m", "sys_pll1_40m", "sys_pll2_100m",
 					     "sys_pll2_200m", "clk_ext2", "clk_ext3", "audio_pll2_out", };
 
+static const char *imx8mm_gic_sels[] = {"osc_24m", "sys_pll2_200m", "sys_pll1_40m", "sys_pll2_100m",
+					     "sys_pll1_800m", "clk_ext2", "clk_ext4", "audio_pll2_out" };
+
 static const char *imx8mm_ecspi1_sels[] = {"osc_24m", "sys_pll2_200m", "sys_pll1_40m", "sys_pll1_160m",
 					   "sys_pll1_800m", "sys_pll3_out", "sys_pll2_250m", "audio_pll2_out", };
 
 static const char *imx8mm_ecspi2_sels[] = {"osc_24m", "sys_pll2_200m", "sys_pll1_40m", "sys_pll1_160m",
 					   "sys_pll1_800m", "sys_pll3_out", "sys_pll2_250m", "audio_pll2_out", };
@@ -556,10 +559,11 @@ static int __init imx8mm_clocks_init(struct device_node *ccm_node)
 	clks[IMX8MM_CLK_UART2] = imx8m_clk_composite("uart2", imx8mm_uart2_sels, base + 0xaf80);
 	clks[IMX8MM_CLK_UART3] = imx8m_clk_composite("uart3", imx8mm_uart3_sels, base + 0xb000);
 	clks[IMX8MM_CLK_UART4] = imx8m_clk_composite("uart4", imx8mm_uart4_sels, base + 0xb080);
 	clks[IMX8MM_CLK_USB_CORE_REF] = imx8m_clk_composite("usb_core_ref", imx8mm_usb_core_sels, base + 0xb100);
 	clks[IMX8MM_CLK_USB_PHY_REF] = imx8m_clk_composite("usb_phy_ref", imx8mm_usb_phy_sels, base + 0xb180);
+	clks[IMX8MM_CLK_GIC] = imx8m_clk_composite_critical("gic", imx8mm_gic_sels, base + 0xb200);
 	clks[IMX8MM_CLK_ECSPI1] = imx8m_clk_composite("ecspi1", imx8mm_ecspi1_sels, base + 0xb280);
 	clks[IMX8MM_CLK_ECSPI2] = imx8m_clk_composite("ecspi2", imx8mm_ecspi2_sels, base + 0xb300);
 	clks[IMX8MM_CLK_PWM1] = imx8m_clk_composite("pwm1", imx8mm_pwm1_sels, base + 0xb380);
 	clks[IMX8MM_CLK_PWM2] = imx8m_clk_composite("pwm2", imx8mm_pwm2_sels, base + 0xb400);
 	clks[IMX8MM_CLK_PWM3] = imx8m_clk_composite("pwm3", imx8mm_pwm3_sels, base + 0xb480);
diff --git a/include/dt-bindings/clock/imx8mm-clock.h b/include/dt-bindings/clock/imx8mm-clock.h
index 1b4353e7b486..26f3ad3fbf5d 100644
--- a/include/dt-bindings/clock/imx8mm-clock.h
+++ b/include/dt-bindings/clock/imx8mm-clock.h
@@ -236,9 +236,10 @@
 
 #define IMX8MM_CLK_DRAM_CORE			220
 #define IMX8MM_CLK_DRAM_ALT_ROOT		221
 
 #define IMX8MM_CLK_NAND_USDHC_BUS_RAWNAND_CLK	222
+#define IMX8MM_CLK_GIC				223
 
-#define IMX8MM_CLK_END				223
+#define IMX8MM_CLK_END				224
 
 #endif
-- 
2.17.1


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Re: [PATCH 1/2] clk: imx8mm: Mark dram_apb critical

[Shawn Guo]

On Mon, May 13, 2019 at 05:32:07AM +0000, Leonard Crestez wrote:
> This clock is used for dram operations inside TF-A and must be kept
> enabled for features such as suspend/resume dram retention and busfreq
> to work.
> 
> This is required for imx8mm suspend to work with NXP branch of TF-A.
> There is an equivalent clk on imx8mq and it's always been marked as
> critical in upstream.
> 
> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>

Applied, thanks.

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Re: [PATCH 2/2] clk: imx8mm: Add gic clk

[Shawn Guo]

On Mon, May 13, 2019 at 05:32:09AM +0000, Leonard Crestez wrote:
> This is documented in the reference manual as GIC_CLK_ROOT.
> 
> In some out-of-tree DVFS the gic clock can end up as the only user of
> sys_pll2 so if we don't define the gic clk explicitly it might be turned
> off.
> 
> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>

It failed to be applied.  Please rebase it onto my clk/imx branch.

Shawn

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