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soc: tegra: Changes for v5.6-rc1

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This adds a couple of optimizations to how the chip ID and straps are
 read and adds support for the FUSE block on Tegra194. Included is also a
 small optimization for the coupled regulator driver to abort early if no
 voltage change has occurred.
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Merge tag 'tegra-for-5.6-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

soc: tegra: Changes for v5.6-rc1

This adds a couple of optimizations to how the chip ID and straps are
read and adds support for the FUSE block on Tegra194. Included is also a
small optimization for the coupled regulator driver to abort early if no
voltage change has occurred.

* tag 'tegra-for-5.6-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  soc/tegra: fuse: Unmap registers once they are not needed anymore
  soc/tegra: fuse: Correct straps' address for older Tegra124 device trees
  soc/tegra: fuse: Warn if straps are not ready
  soc/tegra: fuse: Cache values of straps and Chip ID registers
  soc/tegra: regulators: Do nothing if voltage is unchanged
  soc/tegra: fuse: Add APB DMA dependency for Tegra20
  soc/tegra: fuse: Add Tegra194 support

Link: https://lore.kernel.org/r/20200111003553.2411874-4-thierry.reding@gmail.com
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2020-01-16 10:42:17 -08:00
commit e87f61892c
7 changed files with 70 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/soc/tegra/Kconfig
View File

@ -126,6 +126,7 @@ config SOC_TEGRA_FUSE
def_bool y
depends on ARCH_TEGRA
select SOC_BUS
select TEGRA20_APB_DMA if ARCH_TEGRA_2x_SOC
config SOC_TEGRA_FLOWCTRL
bool

3
drivers/soc/tegra/fuse/fuse-tegra.c
View File

@ -49,6 +49,9 @@ static struct tegra_fuse *fuse = &(struct tegra_fuse) {
};
static const struct of_device_id tegra_fuse_match[] = {
#ifdef CONFIG_ARCH_TEGRA_194_SOC
{ .compatible = "nvidia,tegra194-efuse", .data = &tegra194_fuse_soc },
#endif
#ifdef CONFIG_ARCH_TEGRA_186_SOC
{ .compatible = "nvidia,tegra186-efuse", .data = &tegra186_fuse_soc },
#endif

29
drivers/soc/tegra/fuse/fuse-tegra30.c
View File

@ -320,3 +320,32 @@ const struct tegra_fuse_soc tegra186_fuse_soc = {
.num_lookups = ARRAY_SIZE(tegra186_fuse_lookups),
};
#endif
#if defined(CONFIG_ARCH_TEGRA_194_SOC)
static const struct nvmem_cell_lookup tegra194_fuse_lookups[] = {
{
.nvmem_name = "fuse",
.cell_name = "xusb-pad-calibration",
.dev_id = "3520000.padctl",
.con_id = "calibration",
}, {
.nvmem_name = "fuse",
.cell_name = "xusb-pad-calibration-ext",
.dev_id = "3520000.padctl",
.con_id = "calibration-ext",
},
};
static const struct tegra_fuse_info tegra194_fuse_info = {
.read = tegra30_fuse_read,
.size = 0x300,
.spare = 0x280,
};
const struct tegra_fuse_soc tegra194_fuse_soc = {
.init = tegra30_fuse_init,
.info = &tegra194_fuse_info,
.lookups = tegra194_fuse_lookups,
.num_lookups = ARRAY_SIZE(tegra194_fuse_lookups),
};
#endif

4
drivers/soc/tegra/fuse/fuse.h
View File

@ -108,4 +108,8 @@ extern const struct tegra_fuse_soc tegra210_fuse_soc;
extern const struct tegra_fuse_soc tegra186_fuse_soc;
#endif
#ifdef CONFIG_ARCH_TEGRA_194_SOC
extern const struct tegra_fuse_soc tegra194_fuse_soc;
#endif
#endif

34
drivers/soc/tegra/fuse/tegra-apbmisc.c
View File

@ -21,18 +21,15 @@
#define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT \
(0x3 << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT)
static void __iomem *apbmisc_base;
static void __iomem *strapping_base;
static bool long_ram_code;
static u32 strapping;
static u32 chipid;
u32 tegra_read_chipid(void)
{
if (!apbmisc_base) {
WARN(1, "Tegra Chip ID not yet available\n");
return 0;
}
WARN(!chipid, "Tegra ABP MISC not yet available\n");
return readl_relaxed(apbmisc_base + 4);
return chipid;
}
u8 tegra_get_chip_id(void)
@ -42,10 +39,9 @@ u8 tegra_get_chip_id(void)
u32 tegra_read_straps(void)
{
if (strapping_base)
return readl_relaxed(strapping_base);
else
return 0;
WARN(!chipid, "Tegra ABP MISC not yet available\n");
return strapping;
}
u32 tegra_read_ram_code(void)
@ -63,6 +59,7 @@ u32 tegra_read_ram_code(void)
static const struct of_device_id apbmisc_match[] __initconst = {
{ .compatible = "nvidia,tegra20-apbmisc", },
{ .compatible = "nvidia,tegra186-misc", },
{ .compatible = "nvidia,tegra194-misc", },
{},
};
@ -103,6 +100,7 @@ void __init tegra_init_revision(void)
void __init tegra_init_apbmisc(void)
{
void __iomem *apbmisc_base, *strapping_base;
struct resource apbmisc, straps;
struct device_node *np;
@ -123,7 +121,7 @@ void __init tegra_init_apbmisc(void)
apbmisc.flags = IORESOURCE_MEM;
/* strapping options */
if (tegra_get_chip_id() == TEGRA124) {
if (of_machine_is_compatible("nvidia,tegra124")) {
straps.start = 0x7000e864;
straps.end = 0x7000e867;
} else {
@ -160,12 +158,20 @@ void __init tegra_init_apbmisc(void)
}
apbmisc_base = ioremap_nocache(apbmisc.start, resource_size(&apbmisc));
if (!apbmisc_base)
if (!apbmisc_base) {
pr_err("failed to map APBMISC registers\n");
} else {
chipid = readl_relaxed(apbmisc_base + 4);
iounmap(apbmisc_base);
}
strapping_base = ioremap_nocache(straps.start, resource_size(&straps));
if (!strapping_base)
if (!strapping_base) {
pr_err("failed to map strapping options registers\n");
} else {
strapping = readl_relaxed(strapping_base);
iounmap(strapping_base);
}
long_ram_code = of_property_read_bool(np, "nvidia,long-ram-code");
}

8
drivers/soc/tegra/regulators-tegra20.c
View File

@ -162,6 +162,9 @@ static int tegra20_core_rtc_update(struct tegra_regulator_coupler *tegra,
core_target_uV = max(rtc_uV - max_spread, core_target_uV);
}
if (core_uV == core_target_uV)
goto update_rtc;
err = regulator_set_voltage_rdev(core_rdev,
core_target_uV,
core_max_uV,
@ -170,7 +173,7 @@ static int tegra20_core_rtc_update(struct tegra_regulator_coupler *tegra,
return err;
core_uV = core_target_uV;
update_rtc:
if (rtc_uV < rtc_min_uV) {
rtc_target_uV = min(rtc_uV + max_spread, rtc_min_uV);
rtc_target_uV = min(core_uV + max_spread, rtc_target_uV);
@ -179,6 +182,9 @@ static int tegra20_core_rtc_update(struct tegra_regulator_coupler *tegra,
rtc_target_uV = max(core_uV - max_spread, rtc_target_uV);
}
if (rtc_uV == rtc_target_uV)
continue;
err = regulator_set_voltage_rdev(rtc_rdev,
rtc_target_uV,
rtc_max_uV,

6
drivers/soc/tegra/regulators-tegra30.c
View File

@ -209,6 +209,9 @@ static int tegra30_voltage_update(struct tegra_regulator_coupler *tegra,
cpu_target_uV = max(core_uV - max_spread, cpu_target_uV);
}
if (cpu_uV == cpu_target_uV)
goto update_core;
err = regulator_set_voltage_rdev(cpu_rdev,
cpu_target_uV,
cpu_max_uV,
@ -231,6 +234,9 @@ update_core:
core_target_uV = max(core_target_uV, core_uV - core_max_step);
}
if (core_uV == core_target_uV)
continue;
err = regulator_set_voltage_rdev(core_rdev,
core_target_uV,
core_max_uV,