soc/tegra: pmc: Add IO pads for Tegra264

Populate the IO pads and pins for Tegra264. Tegra264 has internal 1.8V
and 0.6V regulators that must be enabled when selecting the 1.8V mode
for the sdmmc1-hv IO pad. To support this a new 'ena_1v8' member is
added to the 'tegra_io_pad_vctrl' structure to populate the bits that
need to be set to enable these internal regulators. Although this is
enabling 1.8V (bit 1) and 0.6V (bit 2) regulators, it is simply called
'ena_1v8' because these are both enabled for 1.8V operation. Note that
these internal regulators are disabled when not using 1.8V mode.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Author: jonhunter

drivers/soc/tegra/pmc.c

@@ -201,6 +201,9 @@
 #define  TEGRA_SMC_PMC_READ	0xaa
 #define  TEGRA_SMC_PMC_WRITE	0xbb
 
+/* Tegra264 and later */
+#define PMC_IMPL_SDMMC1_HV_PADCTL_0	0x41004
+
 struct pmc_clk {
 	struct clk_hw hw;
 	struct tegra_pmc *pmc;
@@ -301,6 +304,7 @@ struct tegra_io_pad_vctrl {
 	enum tegra_io_pad id;
 	unsigned int offset;
 	unsigned int ena_3v3;
+	unsigned int ena_1v8;
 };
 
 struct tegra_pmc_regs {
@@ -1931,11 +1935,18 @@ static int tegra_io_pad_set_voltage(struct tegra_pmc *pmc, enum tegra_io_pad id,
 
 	value = tegra_pmc_readl(pmc, pad->offset);
 
-	if (voltage == TEGRA_IO_PAD_VOLTAGE_1V8)
+	if (voltage == TEGRA_IO_PAD_VOLTAGE_1V8) {
 		value &= ~BIT(pad->ena_3v3);
-	else
+
+		if (pad->ena_1v8)
+			value |= pad->ena_1v8;
+	} else {
 		value |= BIT(pad->ena_3v3);
 
+		if (pad->ena_1v8)
+			value &= ~pad->ena_1v8;
+	}
+
 	tegra_pmc_writel(pmc, value, pad->offset);
 
 	mutex_unlock(&pmc->powergates_lock);
@@ -3724,6 +3735,7 @@ static const u8 tegra124_cpu_powergates[] = {
 		.id		= (_id),				\
 		.offset		= (_offset),				\
 		.ena_3v3	= (_ena_3v3),				\
+		.ena_1v8	= 0,					\
 	})
 
 #define TEGRA_IO_PIN_DESC(_id, _name)	\
@@ -4583,6 +4595,50 @@ static const struct tegra_pmc_soc tegra234_pmc_soc = {
 	.has_single_mmio_aperture = false,
 };
 
+#define TEGRA264_IO_PAD_VCTRL(_id, _offset, _ena_3v3, _ena_1v8)		\
+	((struct tegra_io_pad_vctrl) {					\
+		.id		= (_id),				\
+		.offset		= (_offset),				\
+		.ena_3v3	= (_ena_3v3),				\
+		.ena_1v8	= (_ena_1v8),				\
+	})
+
+static const struct tegra_io_pad_soc tegra264_io_pads[] = {
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSIA, 0, 0x41020, 0x41024, "csia"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSIB, 1, 0x41020, 0x41024, "csib"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_HDMI_DP0, 0, 0x41050, 0x41054, "hdmi-dp0"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSIC, 2, 0x41020, 0x41024, "csic"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSID, 3, 0x41020, 0x41024, "csid"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSIE, 4, 0x41020, 0x41024, "csie"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSIF, 5, 0x41020, 0x41024, "csif"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_UFS, 4, 0x41040, 0x41044, "ufs0"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_EDP, 0, 0x41028, 0x4102c, "edp"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_SDMMC1, 0, 0x41090, 0x41094, "sdmmc1"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_SDMMC1_HV, UINT_MAX, UINT_MAX, UINT_MAX, "sdmmc1-hv"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSIG, 6, 0x41020, 0x41024, "csig"),
+	TEGRA_IO_PAD(TEGRA_IO_PAD_CSIH, 7, 0x41020, 0x41024, "csih"),
+};
+
+static const struct tegra_io_pad_vctrl tegra264_io_pad_vctrls[] = {
+	TEGRA264_IO_PAD_VCTRL(TEGRA_IO_PAD_SDMMC1_HV, PMC_IMPL_SDMMC1_HV_PADCTL_0, 0, 0x6),
+};
+
+static const struct pinctrl_pin_desc tegra264_pin_descs[] = {
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSIA, "csia"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSIB, "csib"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_HDMI_DP0, "hdmi-dp0"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSIC, "csic"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSID, "csid"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSIE, "csie"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSIF, "csif"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_UFS, "ufs0"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_EDP, "edp"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_SDMMC1, "sdmmc1"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_SDMMC1_HV, "sdmmc1-hv"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSIG, "csig"),
+	TEGRA_IO_PIN_DESC(TEGRA_IO_PAD_CSIH, "csih"),
+};
+
 static const struct tegra_pmc_regs tegra264_pmc_regs = {
 	.scratch0 = 0x684,
 	.rst_status = 0x4,
@@ -4705,6 +4761,12 @@ static const struct tegra_wake_event tegra264_wake_events[] = {
 
 static const struct tegra_pmc_soc tegra264_pmc_soc = {
 	.has_io_pad_wren = false,
+	.num_io_pads = ARRAY_SIZE(tegra264_io_pads),
+	.io_pads = tegra264_io_pads,
+	.num_io_pad_vctrls = ARRAY_SIZE(tegra264_io_pad_vctrls),
+	.io_pad_vctrls = tegra264_io_pad_vctrls,
+	.num_pin_descs = ARRAY_SIZE(tegra264_pin_descs),
+	.pin_descs = tegra264_pin_descs,
 	.regs = &tegra264_pmc_regs,
 	.init = tegra186_pmc_init,
 	.setup_irq_polarity = tegra186_pmc_setup_irq_polarity,