x86: apl: Add pinctrl driver
Add a driver for the Apollo Lake pinctrl. This mostly makes use of the
common Intel pinctrl support.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/pinctrl/intel/Kconfig b/drivers/pinctrl/intel/Kconfig
index c01c624..e62a2e0 100644
--- a/drivers/pinctrl/intel/Kconfig
+++ b/drivers/pinctrl/intel/Kconfig
@@ -5,12 +5,22 @@
if PINCTRL_INTEL
config INTEL_PINCTRL_DUAL_ROUTE_SUPPORT
- def_bool y
+ bool
+ default y
config INTEL_PINCTRL_PADCFG_PADTOL
- def_bool n
+ bool n
config INTEL_PINCTRL_IOSTANDBY
- def_bool y
+ bool
+ default y
+
+config PINCTRL_INTEL_APL
+ bool "Support Intel Apollo Lake (APL)"
+ help
+ Add support for Intel Apollo Lake pin-control and pin-mux settings.
+ These are mostly read from the device tree, with the early-pads
+ property in the host bridge and the pads property in the fsp-s
+ subnode of the host bridge.
endif
diff --git a/drivers/pinctrl/intel/Makefile b/drivers/pinctrl/intel/Makefile
index bc1aad2..3aed8e9 100644
--- a/drivers/pinctrl/intel/Makefile
+++ b/drivers/pinctrl/intel/Makefile
@@ -3,3 +3,4 @@
# Copyright 2019 Google LLC
obj-y += pinctrl.o
+obj-$(CONFIG_PINCTRL_INTEL_APL) += pinctrl_apl.o
diff --git a/drivers/pinctrl/intel/pinctrl_apl.c b/drivers/pinctrl/intel/pinctrl_apl.c
new file mode 100644
index 0000000..bd80435
--- /dev/null
+++ b/drivers/pinctrl/intel/pinctrl_apl.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017 Intel Corp.
+ * Copyright 2019 Google LLC
+ *
+ * Taken partly from coreboot gpio.c
+ */
+
+#define LOG_CATEGORY UCLASS_GPIO
+
+#include <common.h>
+#include <dm.h>
+#include <dt-structs.h>
+#include <p2sb.h>
+#include <asm/intel_pinctrl.h>
+#include <asm-generic/gpio.h>
+#include <asm/intel_pinctrl_defs.h>
+
+/**
+ * struct apl_gpio_platdata - platform data for each device
+ *
+ * @dtplat: of-platdata data from C struct
+ */
+struct apl_gpio_platdata {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ /* Put this first since driver model will copy the data here */
+ struct dtd_intel_apl_pinctrl dtplat;
+#endif
+};
+
+static const struct reset_mapping rst_map[] = {
+ { .logical = PAD_CFG0_LOGICAL_RESET_PWROK, .chipset = 0U << 30 },
+ { .logical = PAD_CFG0_LOGICAL_RESET_DEEP, .chipset = 1U << 30 },
+ { .logical = PAD_CFG0_LOGICAL_RESET_PLTRST, .chipset = 2U << 30 },
+};
+
+/* Groups for each community */
+static const struct pad_group apl_community_n_groups[] = {
+ INTEL_GPP(N_OFFSET, N_OFFSET, GPIO_31), /* NORTH 0 */
+ INTEL_GPP(N_OFFSET, GPIO_32, JTAG_TRST_B), /* NORTH 1 */
+ INTEL_GPP(N_OFFSET, JTAG_TMS, SVID0_CLK), /* NORTH 2 */
+};
+
+static const struct pad_group apl_community_w_groups[] = {
+ INTEL_GPP(W_OFFSET, W_OFFSET, OSC_CLK_OUT_1), /* WEST 0 */
+ INTEL_GPP(W_OFFSET, OSC_CLK_OUT_2, SUSPWRDNACK),/* WEST 1 */
+};
+
+static const struct pad_group apl_community_sw_groups[] = {
+ INTEL_GPP(SW_OFFSET, SW_OFFSET, SMB_ALERTB), /* SOUTHWEST 0 */
+ INTEL_GPP(SW_OFFSET, SMB_CLK, LPC_FRAMEB), /* SOUTHWEST 1 */
+};
+
+static const struct pad_group apl_community_nw_groups[] = {
+ INTEL_GPP(NW_OFFSET, NW_OFFSET, PROCHOT_B), /* NORTHWEST 0 */
+ INTEL_GPP(NW_OFFSET, PMIC_I2C_SCL, GPIO_106), /* NORTHWEST 1 */
+ INTEL_GPP(NW_OFFSET, GPIO_109, GPIO_123), /* NORTHWEST 2 */
+};
+
+/* TODO(sjg@chromium.org): Consider moving this to device tree */
+static const struct pad_community apl_gpio_communities[] = {
+ {
+ .port = PID_GPIO_N,
+ .first_pad = N_OFFSET,
+ .last_pad = SVID0_CLK,
+ .num_gpi_regs = NUM_N_GPI_REGS,
+ .gpi_status_offset = NUM_NW_GPI_REGS + NUM_W_GPI_REGS
+ + NUM_SW_GPI_REGS,
+ .pad_cfg_base = PAD_CFG_BASE,
+ .host_own_reg_0 = HOSTSW_OWN_REG_0,
+ .gpi_int_sts_reg_0 = GPI_INT_STS_0,
+ .gpi_int_en_reg_0 = GPI_INT_EN_0,
+ .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
+ .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
+ .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+ .name = "GPIO_GPE_N",
+ .acpi_path = "\\_SB.GPO0",
+ .reset_map = rst_map,
+ .num_reset_vals = ARRAY_SIZE(rst_map),
+ .groups = apl_community_n_groups,
+ .num_groups = ARRAY_SIZE(apl_community_n_groups),
+ }, {
+ .port = PID_GPIO_NW,
+ .first_pad = NW_OFFSET,
+ .last_pad = GPIO_123,
+ .num_gpi_regs = NUM_NW_GPI_REGS,
+ .gpi_status_offset = NUM_W_GPI_REGS + NUM_SW_GPI_REGS,
+ .pad_cfg_base = PAD_CFG_BASE,
+ .host_own_reg_0 = HOSTSW_OWN_REG_0,
+ .gpi_int_sts_reg_0 = GPI_INT_STS_0,
+ .gpi_int_en_reg_0 = GPI_INT_EN_0,
+ .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
+ .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
+ .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+ .name = "GPIO_GPE_NW",
+ .acpi_path = "\\_SB.GPO1",
+ .reset_map = rst_map,
+ .num_reset_vals = ARRAY_SIZE(rst_map),
+ .groups = apl_community_nw_groups,
+ .num_groups = ARRAY_SIZE(apl_community_nw_groups),
+ }, {
+ .port = PID_GPIO_W,
+ .first_pad = W_OFFSET,
+ .last_pad = SUSPWRDNACK,
+ .num_gpi_regs = NUM_W_GPI_REGS,
+ .gpi_status_offset = NUM_SW_GPI_REGS,
+ .pad_cfg_base = PAD_CFG_BASE,
+ .host_own_reg_0 = HOSTSW_OWN_REG_0,
+ .gpi_int_sts_reg_0 = GPI_INT_STS_0,
+ .gpi_int_en_reg_0 = GPI_INT_EN_0,
+ .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
+ .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
+ .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+ .name = "GPIO_GPE_W",
+ .acpi_path = "\\_SB.GPO2",
+ .reset_map = rst_map,
+ .num_reset_vals = ARRAY_SIZE(rst_map),
+ .groups = apl_community_w_groups,
+ .num_groups = ARRAY_SIZE(apl_community_w_groups),
+ }, {
+ .port = PID_GPIO_SW,
+ .first_pad = SW_OFFSET,
+ .last_pad = LPC_FRAMEB,
+ .num_gpi_regs = NUM_SW_GPI_REGS,
+ .gpi_status_offset = 0,
+ .pad_cfg_base = PAD_CFG_BASE,
+ .host_own_reg_0 = HOSTSW_OWN_REG_0,
+ .gpi_int_sts_reg_0 = GPI_INT_STS_0,
+ .gpi_int_en_reg_0 = GPI_INT_EN_0,
+ .gpi_smi_sts_reg_0 = GPI_SMI_STS_0,
+ .gpi_smi_en_reg_0 = GPI_SMI_EN_0,
+ .max_pads_per_group = GPIO_MAX_NUM_PER_GROUP,
+ .name = "GPIO_GPE_SW",
+ .acpi_path = "\\_SB.GPO3",
+ .reset_map = rst_map,
+ .num_reset_vals = ARRAY_SIZE(rst_map),
+ .groups = apl_community_sw_groups,
+ .num_groups = ARRAY_SIZE(apl_community_sw_groups),
+ },
+};
+
+static int apl_pinctrl_ofdata_to_platdata(struct udevice *dev)
+{
+ struct p2sb_child_platdata *pplat;
+ const struct pad_community *comm = NULL;
+ int i;
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct apl_gpio_platdata *plat = dev_get_platdata(dev);
+ int ret;
+
+ /*
+ * It would be nice to do this in the bind() method, but with
+ * of-platdata binding happens in the order that DM finds things in the
+ * linker list (i.e. alphabetical order by driver name). So the GPIO
+ * device may well be bound before its parent (p2sb), and this call
+ * will fail if p2sb is not bound yet.
+ *
+ * TODO(sjg@chromium.org): Add a parent pointer to child devices in dtoc
+ */
+ ret = p2sb_set_port_id(dev, plat->dtplat.intel_p2sb_port_id);
+ if (ret)
+ return log_msg_ret("Could not set port id", ret);
+#endif
+ /* Attach this device to its community structure */
+ pplat = dev_get_parent_platdata(dev);
+ for (i = 0; i < ARRAY_SIZE(apl_gpio_communities); i++) {
+ if (apl_gpio_communities[i].port == pplat->pid)
+ comm = &apl_gpio_communities[i];
+ }
+
+ return intel_pinctrl_ofdata_to_platdata(dev, comm, 2);
+}
+
+static const struct udevice_id apl_gpio_ids[] = {
+ { .compatible = "intel,apl-pinctrl"},
+ { }
+};
+
+U_BOOT_DRIVER(apl_pinctrl_drv) = {
+ .name = "intel_apl_pinctrl",
+ .id = UCLASS_PINCTRL,
+ .of_match = apl_gpio_ids,
+ .probe = intel_pinctrl_probe,
+ .ops = &intel_pinctrl_ops,
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
+ .bind = dm_scan_fdt_dev,
+#endif
+ .ofdata_to_platdata = apl_pinctrl_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct intel_pinctrl_priv),
+ .platdata_auto_alloc_size = sizeof(struct apl_gpio_platdata),
+};