[PATCH v3] soc/tegra: pmc: Add PMC support for Tegra410

[PATCH v3] soc/tegra: pmc: Add PMC support for Tegra410

[Kartik Rajput]

Tegra410 uses PMC driver only to retrieve system reset reason using PMC
sysfs. Tegra410 uses ACPI to probe PMC, unlike device-tree boot it does
not use the early initialisation sequence.

Add PMC support for Tegra410, which uses the PMC driver to retrieve
the system reset reason via PMC sysfs.

Signed-off-by: Kartik Rajput <kkartik@nvidia.com>
---
Changes in v3:
	* Remove unused entries from tegra410_pmc_soc.
Changes in v2:
	* Updated commit message.
---
 drivers/soc/tegra/pmc.c | 101 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)

diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 2ee6539d796a..f89de1969946 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -11,6 +11,7 @@
 
 #define pr_fmt(fmt) "tegra-pmc: " fmt
 
+#include <linux/acpi.h>
 #include <linux/arm-smccc.h>
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
@@ -3117,12 +3118,30 @@ static void tegra_pmc_reset_suspend_mode(void *data)
 	pmc->suspend_mode = TEGRA_SUSPEND_NOT_READY;
 }
 
+static int tegra_pmc_acpi_probe(struct platform_device *pdev)
+{
+	pmc->soc = device_get_match_data(&pdev->dev);
+	pmc->dev = &pdev->dev;
+
+	pmc->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(pmc->base))
+		return PTR_ERR(pmc->base);
+
+	tegra_pmc_reset_sysfs_init(pmc);
+	platform_set_drvdata(pdev, pmc);
+
+	return 0;
+}
+
 static int tegra_pmc_probe(struct platform_device *pdev)
 {
 	void __iomem *base;
 	struct resource *res;
 	int err;
 
+	if (is_acpi_node(dev_fwnode(&pdev->dev)))
+		return tegra_pmc_acpi_probe(pdev);
+
 	/*
 	 * Early initialisation should have configured an initial
 	 * register mapping and setup the soc data pointer. If these
@@ -4783,6 +4802,81 @@ static const struct tegra_pmc_soc tegra264_pmc_soc = {
 	.max_wake_vectors = 4,
 };
 
+static const char * const tegra410_reset_sources[] = {
+	"SYS_RESET_N",		/* 0x0 */
+	"CSDC_RTC_XTAL",
+	"VREFRO_POWER_BAD",
+	"FMON_32K",
+	"FMON_OSC",
+	"POD_RTC",
+	"POD_IO",
+	"POD_PLUS_IO_SPLL",
+	"POD_PLUS_IO_VMON",	/* 0x8 */
+	"POD_PLUS_SOC",
+	"VMON_PLUS_UV",
+	"VMON_PLUS_OV",
+	"FUSECRC_FAULT",
+	"OSC_FAULT",
+	"BPMP_BOOT_FAULT",
+	"SCPM_BPMP_CORE_CLK",
+	"SCPM_PSC_SE_CLK",	/* 0x10 */
+	"VMON_SOC_MIN",
+	"VMON_SOC_MAX",
+	"NVJTAG_SEL_MONITOR",
+	"L0_RST_REQ_N",
+	"NV_THERM_FAULT",
+	"PSC_SW",
+	"POD_C2C_LPI_0",
+	"POD_C2C_LPI_1",	/* 0x18 */
+	"BPMP_FMON",
+	"FMON_SPLL_OUT",
+	"L1_RST_REQ_N",
+	"OCP_RECOVERY",
+	"AO_WDT_POR",
+	"BPMP_WDT_POR",
+	"RAS_WDT_POR",
+	"TOP_0_WDT_POR",	/* 0x20 */
+	"TOP_1_WDT_POR",
+	"TOP_2_WDT_POR",
+	"PSC_WDT_POR",
+	"OOBHUB_WDT_POR",
+	"MSS_SEQ_WDT_POR",
+	"SW_MAIN",
+	"L0L1_RST_OUT_N",
+	"HSM",			/* 0x28 */
+	"CSITE_SW",
+	"AO_WDT_DBG",
+	"BPMP_WDT_DBG",
+	"RAS_WDT_DBG",
+	"TOP_0_WDT_DBG",
+	"TOP_1_WDT_DBG",
+	"TOP_2_WDT_DBG",
+	"PSC_WDT_DBG",		/* 0x30 */
+	"TSC_0_WDT_DBG",
+	"TSC_1_WDT_DBG",
+	"OOBHUB_WDT_DBG",
+	"MSS_SEQ_WDT_DBG",
+	"L2_RST_REQ_N",
+	"L2_RST_OUT_N",
+	"SC7"
+};
+
+static const struct tegra_pmc_regs tegra410_pmc_regs = {
+	.rst_status = 0x8,
+	.rst_source_shift = 0x2,
+	.rst_source_mask = 0xfc,
+	.rst_level_shift = 0x0,
+	.rst_level_mask = 0x3,
+};
+
+static const struct tegra_pmc_soc tegra410_pmc_soc = {
+	.regs = &tegra410_pmc_regs,
+	.reset_sources = tegra410_reset_sources,
+	.num_reset_sources = ARRAY_SIZE(tegra410_reset_sources),
+	.reset_levels = tegra186_reset_levels,
+	.num_reset_levels = ARRAY_SIZE(tegra186_reset_levels),
+};
+
 static const struct of_device_id tegra_pmc_match[] = {
 	{ .compatible = "nvidia,tegra264-pmc", .data = &tegra264_pmc_soc },
 	{ .compatible = "nvidia,tegra234-pmc", .data = &tegra234_pmc_soc },
@@ -4797,6 +4891,12 @@ static const struct of_device_id tegra_pmc_match[] = {
 	{ }
 };
 
+static const struct acpi_device_id tegra_pmc_acpi_match[] = {
+	{ .id = "NVDA2016", .driver_data = (kernel_ulong_t)&tegra410_pmc_soc },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, tegra_pmc_acpi_match);
+
 static void tegra_pmc_sync_state(struct device *dev)
 {
 	struct device_node *np, *child;
@@ -4847,6 +4947,7 @@ static struct platform_driver tegra_pmc_driver = {
 		.name = "tegra-pmc",
 		.suppress_bind_attrs = true,
 		.of_match_table = tegra_pmc_match,
+		.acpi_match_table = tegra_pmc_acpi_match,
 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
 		.pm = &tegra_pmc_pm_ops,
 #endif
-- 
2.43.0