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i.MX clock changes for 6.15

Browse Source 
- Add missing AXI clock to the i.MX8MP AUDIOMIX in dt-bindings schema.
 - Fix DSP and OCRAM_A parent clocks in i.MX8MP AUDIOMIX clock provider.
 - Document vendor specific operating-mode property in i.MX8M clock
   provider dt-bindings schema.
 - Apply overdrive/nominal constraints based on DT property in i.MX8MP
   clock provider.
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Merge tag 'clk-imx-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/abelvesa/linux into clk-imx

Pull i.MX clk driver updates from Abel Vesa:

 - Add missing AXI clock to the i.MX8MP AUDIOMIX in dt-bindings schema
 - Fix DSP and OCRAM_A parent clocks in i.MX8MP AUDIOMIX clock provider
 - Document vendor specific operating-mode property in i.MX8M clock
   provider dt-bindings schema
 - Apply overdrive/nominal constraints based on DT property in i.MX8MP
   clock provider

* tag 'clk-imx-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/abelvesa/linux:
  clk: imx8mp: inform CCF of maximum frequency of clocks
  dt-bindings: clock: imx8m: document nominal/overdrive properties
  clk: clk-imx8mp-audiomix: fix dsp/ocram_a clock parents
  dt-bindings: clock: imx8mp: add axi clock
This commit is contained in:
Stephen Boyd 2025-03-11 11:14:21 -07:00
commit 8fbf3d479b
4 changed files with 168 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/devicetree/bindings/clock/imx8m-clock.yaml
View File

@ -43,6 +43,13 @@ properties:
ID in its "clocks" phandle cell. See include/dt-bindings/clock/imx8m-clock.h
for the full list of i.MX8M clock IDs.
fsl,operating-mode:
$ref: /schemas/types.yaml#/definitions/string
enum: [nominal, overdrive]
description:
The operating mode of the SoC. This affects the maximum clock rates that
can safely be configured by the clock controller.
required:
- compatible
- reg
@ -109,6 +116,7 @@ examples:
<&clk_ext3>, <&clk_ext4>;
clock-names = "osc_32k", "osc_24m", "clk_ext1", "clk_ext2",
"clk_ext3", "clk_ext4";
fsl,operating-mode = "nominal";
};
- |

10
Documentation/devicetree/bindings/clock/imx8mp-audiomix.yaml
View File

@ -24,8 +24,8 @@ properties:
maxItems: 1
clocks:
minItems: 7
maxItems: 7
minItems: 8
maxItems: 8
clock-names:
items:
@ -36,6 +36,7 @@ properties:
- const: sai5
- const: sai6
- const: sai7
- const: axi
'#clock-cells':
const: 1
@ -72,10 +73,11 @@ examples:
<&clk IMX8MP_CLK_SAI3>,
<&clk IMX8MP_CLK_SAI5>,
<&clk IMX8MP_CLK_SAI6>,
<&clk IMX8MP_CLK_SAI7>;
<&clk IMX8MP_CLK_SAI7>,
<&clk IMX8MP_CLK_AUDIO_AXI_ROOT>;
clock-names = "ahb",
"sai1", "sai2", "sai3",
"sai5", "sai6", "sai7";
"sai5", "sai6", "sai7", "axi";
power-domains = <&pgc_audio>;
};

6
drivers/clk/imx/clk-imx8mp-audiomix.c
View File

@ -180,14 +180,14 @@ static struct clk_imx8mp_audiomix_sel sels[] = {
CLK_GATE("asrc", ASRC_IPG),
CLK_GATE("pdm", PDM_IPG),
CLK_GATE("earc", EARC_IPG),
CLK_GATE("ocrama", OCRAMA_IPG),
CLK_GATE_PARENT("ocrama", OCRAMA_IPG, "axi"),
CLK_GATE("aud2htx", AUD2HTX_IPG),
CLK_GATE_PARENT("earc_phy", EARC_PHY, "sai_pll_out_div2"),
CLK_GATE("sdma2", SDMA2_ROOT),
CLK_GATE("sdma3", SDMA3_ROOT),
CLK_GATE("spba2", SPBA2_ROOT),
CLK_GATE("dsp", DSP_ROOT),
CLK_GATE("dspdbg", DSPDBG_ROOT),
CLK_GATE_PARENT("dsp", DSP_ROOT, "axi"),
CLK_GATE_PARENT("dspdbg", DSPDBG_ROOT, "axi"),
CLK_GATE("edma", EDMA_ROOT),
CLK_GATE_PARENT("audpll", AUDPLL_ROOT, "osc_24m"),
CLK_GATE("mu2", MU2_ROOT),

151
drivers/clk/imx/clk-imx8mp.c
View File

@ -8,6 +8,7 @@
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/units.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@ -406,11 +407,151 @@ static const char * const imx8mp_clkout_sels[] = {"audio_pll1_out", "audio_pll2_
static struct clk_hw **hws;
static struct clk_hw_onecell_data *clk_hw_data;
struct imx8mp_clock_constraints {
unsigned int clkid;
u32 maxrate;
};
/*
* Below tables are taken from IMX8MPCEC Rev. 2.1, 07/2023
* Table 13. Maximum frequency of modules.
* Probable typos fixed are marked with a comment.
*/
static const struct imx8mp_clock_constraints imx8mp_clock_common_constraints[] = {
{ IMX8MP_CLK_A53_DIV, 1000 * HZ_PER_MHZ },
{ IMX8MP_CLK_ENET_AXI, 266666667 }, /* Datasheet claims 266MHz */
{ IMX8MP_CLK_NAND_USDHC_BUS, 266666667 }, /* Datasheet claims 266MHz */
{ IMX8MP_CLK_MEDIA_APB, 200 * HZ_PER_MHZ },
{ IMX8MP_CLK_HDMI_APB, 133333333 }, /* Datasheet claims 133MHz */
{ IMX8MP_CLK_ML_AXI, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_AHB, 133333333 },
{ IMX8MP_CLK_IPG_ROOT, 66666667 },
{ IMX8MP_CLK_AUDIO_AHB, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_DISP2_PIX, 170 * HZ_PER_MHZ },
{ IMX8MP_CLK_DRAM_ALT, 666666667 },
{ IMX8MP_CLK_DRAM_APB, 200 * HZ_PER_MHZ },
{ IMX8MP_CLK_CAN1, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_CAN2, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_PCIE_AUX, 10 * HZ_PER_MHZ },
{ IMX8MP_CLK_I2C5, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_I2C6, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_SAI1, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_SAI2, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_SAI3, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_SAI5, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_SAI6, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_ENET_QOS, 125 * HZ_PER_MHZ },
{ IMX8MP_CLK_ENET_QOS_TIMER, 200 * HZ_PER_MHZ },
{ IMX8MP_CLK_ENET_REF, 125 * HZ_PER_MHZ },
{ IMX8MP_CLK_ENET_TIMER, 125 * HZ_PER_MHZ },
{ IMX8MP_CLK_ENET_PHY_REF, 125 * HZ_PER_MHZ },
{ IMX8MP_CLK_NAND, 500 * HZ_PER_MHZ },
{ IMX8MP_CLK_QSPI, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_USDHC1, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_USDHC2, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_I2C1, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_I2C2, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_I2C3, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_I2C4, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_UART1, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_UART2, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_UART3, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_UART4, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_ECSPI1, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_ECSPI2, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_PWM1, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_PWM2, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_PWM3, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_PWM4, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_GPT1, 100 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPT2, 100 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPT3, 100 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPT4, 100 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPT5, 100 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPT6, 100 * HZ_PER_MHZ },
{ IMX8MP_CLK_WDOG, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_IPP_DO_CLKO1, 200 * HZ_PER_MHZ },
{ IMX8MP_CLK_IPP_DO_CLKO2, 200 * HZ_PER_MHZ },
{ IMX8MP_CLK_HDMI_REF_266M, 266 * HZ_PER_MHZ },
{ IMX8MP_CLK_USDHC3, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_MIPI_PHY1_REF, 300 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_DISP1_PIX, 250 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_CAM2_PIX, 277 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_LDB, 595 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_MIPI_TEST_BYTE, 200 * HZ_PER_MHZ },
{ IMX8MP_CLK_ECSPI3, 80 * HZ_PER_MHZ },
{ IMX8MP_CLK_PDM, 200 * HZ_PER_MHZ },
{ IMX8MP_CLK_SAI7, 66666667 }, /* Datasheet claims 66MHz */
{ IMX8MP_CLK_MAIN_AXI, 400 * HZ_PER_MHZ },
{ /* Sentinel */ }
};
static const struct imx8mp_clock_constraints imx8mp_clock_nominal_constraints[] = {
{ IMX8MP_CLK_M7_CORE, 600 * HZ_PER_MHZ },
{ IMX8MP_CLK_ML_CORE, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU3D_CORE, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU3D_SHADER_CORE, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU2D_CORE, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_AUDIO_AXI_SRC, 600 * HZ_PER_MHZ },
{ IMX8MP_CLK_HSIO_AXI, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_ISP, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_BUS, 600 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_AXI, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_HDMI_AXI, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU_AXI, 600 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU_AHB, 300 * HZ_PER_MHZ },
{ IMX8MP_CLK_NOC, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_NOC_IO, 600 * HZ_PER_MHZ },
{ IMX8MP_CLK_ML_AHB, 300 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_G1, 600 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_G2, 500 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_CAM1_PIX, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_VC8000E, 400 * HZ_PER_MHZ }, /* Datasheet claims 500MHz */
{ IMX8MP_CLK_DRAM_CORE, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_GIC, 400 * HZ_PER_MHZ },
{ /* Sentinel */ }
};
static const struct imx8mp_clock_constraints imx8mp_clock_overdrive_constraints[] = {
{ IMX8MP_CLK_M7_CORE, 800 * HZ_PER_MHZ},
{ IMX8MP_CLK_ML_CORE, 1000 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU3D_CORE, 1000 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU3D_SHADER_CORE, 1000 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU2D_CORE, 1000 * HZ_PER_MHZ },
{ IMX8MP_CLK_AUDIO_AXI_SRC, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_HSIO_AXI, 500 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_ISP, 500 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_BUS, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_AXI, 500 * HZ_PER_MHZ },
{ IMX8MP_CLK_HDMI_AXI, 500 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU_AXI, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_GPU_AHB, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_NOC, 1000 * HZ_PER_MHZ },
{ IMX8MP_CLK_NOC_IO, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_ML_AHB, 400 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_G1, 800 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_G2, 700 * HZ_PER_MHZ },
{ IMX8MP_CLK_MEDIA_CAM1_PIX, 500 * HZ_PER_MHZ },
{ IMX8MP_CLK_VPU_VC8000E, 500 * HZ_PER_MHZ }, /* Datasheet claims 400MHz */
{ IMX8MP_CLK_DRAM_CORE, 1000 * HZ_PER_MHZ },
{ IMX8MP_CLK_GIC, 500 * HZ_PER_MHZ },
{ /* Sentinel */ }
};
static void imx8mp_clocks_apply_constraints(const struct imx8mp_clock_constraints constraints[])
{
const struct imx8mp_clock_constraints *constr;
for (constr = constraints; constr->clkid; constr++)
clk_hw_set_rate_range(hws[constr->clkid], 0, constr->maxrate);
}
static int imx8mp_clocks_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np;
void __iomem *anatop_base, *ccm_base;
const char *opmode;
int err;
np = of_find_compatible_node(NULL, NULL, "fsl,imx8mp-anatop");
@ -715,6 +856,16 @@ static int imx8mp_clocks_probe(struct platform_device *pdev)
imx_check_clk_hws(hws, IMX8MP_CLK_END);
imx8mp_clocks_apply_constraints(imx8mp_clock_common_constraints);
err = of_property_read_string(np, "fsl,operating-mode", &opmode);
if (!err) {
if (!strcmp(opmode, "nominal"))
imx8mp_clocks_apply_constraints(imx8mp_clock_nominal_constraints);
else if (!strcmp(opmode, "overdrive"))
imx8mp_clocks_apply_constraints(imx8mp_clock_overdrive_constraints);
}
err = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);
if (err < 0) {
dev_err(dev, "failed to register hws for i.MX8MP\n");