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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-20 18:42:28 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-20 18:42:28 -0800 |
commit | e767b3530acbf651593e3d357fe1168a024d8061 (patch) | |
tree | 0f549bbb4cf187661416f672dd0329c59b7a8fee /drivers/soc/imx | |
parent | 82851fce6107d5a3e66d95aee2ae68860a732703 (diff) | |
parent | 4f79a8b06fccec3dd68935db5a4662435c472abf (diff) | |
download | linux-stable-e767b3530acbf651593e3d357fe1168a024d8061.tar.gz linux-stable-e767b3530acbf651593e3d357fe1168a024d8061.tar.bz2 linux-stable-e767b3530acbf651593e3d357fe1168a024d8061.zip |
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/soc/imx')
-rw-r--r-- | drivers/soc/imx/soc-imx8m.c | 84 |
1 files changed, 72 insertions, 12 deletions
diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c index cc57a384d74d..071e14496e4b 100644 --- a/drivers/soc/imx/soc-imx8m.c +++ b/drivers/soc/imx/soc-imx8m.c @@ -5,6 +5,8 @@ #include <linux/init.h> #include <linux/io.h> +#include <linux/module.h> +#include <linux/nvmem-consumer.h> #include <linux/of_address.h> #include <linux/slab.h> #include <linux/sys_soc.h> @@ -29,7 +31,7 @@ struct imx8_soc_data { char *name; - u32 (*soc_revision)(void); + u32 (*soc_revision)(struct device *dev); }; static u64 soc_uid; @@ -50,7 +52,7 @@ static u32 imx8mq_soc_revision_from_atf(void) static inline u32 imx8mq_soc_revision_from_atf(void) { return 0; }; #endif -static u32 __init imx8mq_soc_revision(void) +static u32 __init imx8mq_soc_revision(struct device *dev) { struct device_node *np; void __iomem *ocotp_base; @@ -75,9 +77,20 @@ static u32 __init imx8mq_soc_revision(void) rev = REV_B1; } - soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH); - soc_uid <<= 32; - soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW); + if (dev) { + int ret; + + ret = nvmem_cell_read_u64(dev, "soc_unique_id", &soc_uid); + if (ret) { + iounmap(ocotp_base); + of_node_put(np); + return ret; + } + } else { + soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH); + soc_uid <<= 32; + soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW); + } iounmap(ocotp_base); of_node_put(np); @@ -107,7 +120,7 @@ static void __init imx8mm_soc_uid(void) of_node_put(np); } -static u32 __init imx8mm_soc_revision(void) +static u32 __init imx8mm_soc_revision(struct device *dev) { struct device_node *np; void __iomem *anatop_base; @@ -125,7 +138,15 @@ static u32 __init imx8mm_soc_revision(void) iounmap(anatop_base); of_node_put(np); - imx8mm_soc_uid(); + if (dev) { + int ret; + + ret = nvmem_cell_read_u64(dev, "soc_unique_id", &soc_uid); + if (ret) + return ret; + } else { + imx8mm_soc_uid(); + } return rev; } @@ -150,7 +171,7 @@ static const struct imx8_soc_data imx8mp_soc_data = { .soc_revision = imx8mm_soc_revision, }; -static __maybe_unused const struct of_device_id imx8_soc_match[] = { +static __maybe_unused const struct of_device_id imx8_machine_match[] = { { .compatible = "fsl,imx8mq", .data = &imx8mq_soc_data, }, { .compatible = "fsl,imx8mm", .data = &imx8mm_soc_data, }, { .compatible = "fsl,imx8mn", .data = &imx8mn_soc_data, }, @@ -158,12 +179,20 @@ static __maybe_unused const struct of_device_id imx8_soc_match[] = { { } }; +static __maybe_unused const struct of_device_id imx8_soc_match[] = { + { .compatible = "fsl,imx8mq-soc", .data = &imx8mq_soc_data, }, + { .compatible = "fsl,imx8mm-soc", .data = &imx8mm_soc_data, }, + { .compatible = "fsl,imx8mn-soc", .data = &imx8mn_soc_data, }, + { .compatible = "fsl,imx8mp-soc", .data = &imx8mp_soc_data, }, + { } +}; + #define imx8_revision(soc_rev) \ soc_rev ? \ kasprintf(GFP_KERNEL, "%d.%d", (soc_rev >> 4) & 0xf, soc_rev & 0xf) : \ "unknown" -static int __init imx8_soc_init(void) +static int imx8_soc_info(struct platform_device *pdev) { struct soc_device_attribute *soc_dev_attr; struct soc_device *soc_dev; @@ -182,7 +211,10 @@ static int __init imx8_soc_init(void) if (ret) goto free_soc; - id = of_match_node(imx8_soc_match, of_root); + if (pdev) + id = of_match_node(imx8_soc_match, pdev->dev.of_node); + else + id = of_match_node(imx8_machine_match, of_root); if (!id) { ret = -ENODEV; goto free_soc; @@ -191,8 +223,16 @@ static int __init imx8_soc_init(void) data = id->data; if (data) { soc_dev_attr->soc_id = data->name; - if (data->soc_revision) - soc_rev = data->soc_revision(); + if (data->soc_revision) { + if (pdev) { + soc_rev = data->soc_revision(&pdev->dev); + ret = soc_rev; + if (ret < 0) + goto free_soc; + } else { + soc_rev = data->soc_revision(NULL); + } + } } soc_dev_attr->revision = imx8_revision(soc_rev); @@ -230,4 +270,24 @@ free_soc: kfree(soc_dev_attr); return ret; } + +/* Retain device_initcall is for backward compatibility with DTS. */ +static int __init imx8_soc_init(void) +{ + if (of_find_matching_node_and_match(NULL, imx8_soc_match, NULL)) + return 0; + + return imx8_soc_info(NULL); +} device_initcall(imx8_soc_init); + +static struct platform_driver imx8_soc_info_driver = { + .probe = imx8_soc_info, + .driver = { + .name = "imx8_soc_info", + .of_match_table = imx8_soc_match, + }, +}; + +module_platform_driver(imx8_soc_info_driver); +MODULE_LICENSE("GPL v2"); |