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Message-ID: <1418892938.17614.13.camel@kxue-X58A-UD3R>
Date: Thu, 18 Dec 2014 16:55:38 +0800
From: Ken Xue <Ken.Xue@....com>
To: <andy.shevchenko@...il.com>, <mika.westerberg@...ux.intel.com>,
<rjw@...ysocki.net>
CC: <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<Ken.Xue@....com>
Subject: [PATCH 3/3 V2] acpi:lpss:Refine LPSS codes to fit ACPI SOC.
ACPI SOC provides common codes to 1)create platform device from ACPI
2)and handle platform bus notification. These common codes can be
used by LPSS with this patch.
Signed-off-by: Ken Xue <Ken.Xue@....com>
---
drivers/acpi/acpi_lpss.c | 604 ++++++++++++++++++++---------------------------
1 file changed, 251 insertions(+), 353 deletions(-)
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 4f3febf..993a772 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -10,7 +10,6 @@
* published by the Free Software Foundation.
*/
-#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
@@ -21,10 +20,14 @@
#include <linux/pm_runtime.h>
#include <linux/delay.h>
+#include "acpi_soc.h"
#include "internal.h"
ACPI_MODULE_NAME("acpi_lpss");
+static struct acpi_soc a_soc;
+static struct device *proxy_device;
+
#ifdef CONFIG_X86_INTEL_LPSS
#define LPSS_ADDR(desc) ((unsigned long)&desc)
@@ -56,178 +59,77 @@ ACPI_MODULE_NAME("acpi_lpss");
/* LPSS Flags */
#define LPSS_CLK BIT(0)
-#define LPSS_CLK_GATE BIT(1)
-#define LPSS_CLK_DIVIDER BIT(2)
+#define LPSS_CLK_GATE BIT(1)
+#define LPSS_CLK_DIVIDER BIT(2)
#define LPSS_LTR BIT(3)
-#define LPSS_SAVE_CTX BIT(4)
-#define LPSS_DEV_PROXY BIT(5)
-#define LPSS_PROXY_REQ BIT(6)
-
-struct lpss_private_data;
-
-struct lpss_device_desc {
- unsigned int flags;
- unsigned int prv_offset;
- size_t prv_size_override;
- void (*setup)(struct lpss_private_data *pdata);
-};
-
-static struct device *proxy_device;
-
-static struct lpss_device_desc lpss_dma_desc = {
- .flags = LPSS_CLK | LPSS_PROXY_REQ,
-};
-
-struct lpss_private_data {
- void __iomem *mmio_base;
- resource_size_t mmio_size;
- unsigned int fixed_clk_rate;
- struct clk *clk;
- const struct lpss_device_desc *dev_desc;
- u32 prv_reg_ctx[LPSS_PRV_REG_COUNT];
-};
+#define LPSS_SAVE_CTX BIT(4)
+#define LPSS_DEV_PROXY BIT(5)
+#define LPSS_PROXY_REQ BIT(6)
/* UART Component Parameter Register */
#define LPSS_UART_CPR 0xF4
#define LPSS_UART_CPR_AFCE BIT(4)
-static void lpss_uart_setup(struct lpss_private_data *pdata)
+static u32 __lpss_reg_read(struct acpi_soc_dev_private_data *pdata,
+ unsigned int reg)
{
- unsigned int offset;
- u32 val;
-
- offset = pdata->dev_desc->prv_offset + LPSS_TX_INT;
- val = readl(pdata->mmio_base + offset);
- writel(val | LPSS_TX_INT_MASK, pdata->mmio_base + offset);
-
- val = readl(pdata->mmio_base + LPSS_UART_CPR);
- if (!(val & LPSS_UART_CPR_AFCE)) {
- offset = pdata->dev_desc->prv_offset + LPSS_GENERAL;
- val = readl(pdata->mmio_base + offset);
- val |= LPSS_GENERAL_UART_RTS_OVRD;
- writel(val, pdata->mmio_base + offset);
- }
+ return readl(pdata->mmio_base + pdata->dev_desc->prv_offset + reg);
}
-static void byt_i2c_setup(struct lpss_private_data *pdata)
+static void __lpss_reg_write(u32 val, struct acpi_soc_dev_private_data *pdata,
+ unsigned int reg)
{
- unsigned int offset;
- u32 val;
-
- offset = pdata->dev_desc->prv_offset + LPSS_RESETS;
- val = readl(pdata->mmio_base + offset);
- val |= LPSS_RESETS_RESET_APB | LPSS_RESETS_RESET_FUNC;
- writel(val, pdata->mmio_base + offset);
-
- if (readl(pdata->mmio_base + pdata->dev_desc->prv_offset))
- pdata->fixed_clk_rate = 133000000;
+ writel(val, pdata->mmio_base + pdata->dev_desc->prv_offset + reg);
}
-static struct lpss_device_desc lpt_dev_desc = {
- .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_LTR,
- .prv_offset = 0x800,
-};
-
-static struct lpss_device_desc lpt_i2c_dev_desc = {
- .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_LTR,
- .prv_offset = 0x800,
-};
-
-static struct lpss_device_desc lpt_uart_dev_desc = {
- .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_LTR,
- .prv_offset = 0x800,
- .setup = lpss_uart_setup,
-};
-
-static struct lpss_device_desc lpt_sdio_dev_desc = {
- .flags = LPSS_LTR,
- .prv_offset = 0x1000,
- .prv_size_override = 0x1018,
-};
-
-static struct lpss_device_desc byt_pwm_dev_desc = {
- .flags = LPSS_SAVE_CTX,
-};
-
-static struct lpss_device_desc byt_uart_dev_desc = {
- .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX |
- LPSS_DEV_PROXY,
- .prv_offset = 0x800,
- .setup = lpss_uart_setup,
-};
-
-static struct lpss_device_desc byt_spi_dev_desc = {
- .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX |
- LPSS_DEV_PROXY,
- .prv_offset = 0x400,
-};
-
-static struct lpss_device_desc byt_sdio_dev_desc = {
- .flags = LPSS_CLK | LPSS_DEV_PROXY,
-};
-
-static struct lpss_device_desc byt_i2c_dev_desc = {
- .flags = LPSS_CLK | LPSS_SAVE_CTX | LPSS_DEV_PROXY,
- .prv_offset = 0x800,
- .setup = byt_i2c_setup,
-};
-
-#else
-
-#define LPSS_ADDR(desc) (0UL)
-
-#endif /* CONFIG_X86_INTEL_LPSS */
-
-static const struct acpi_device_id acpi_lpss_device_ids[] = {
- /* Generic LPSS devices */
- { "INTL9C60", LPSS_ADDR(lpss_dma_desc) },
-
- /* Lynxpoint LPSS devices */
- { "INT33C0", LPSS_ADDR(lpt_dev_desc) },
- { "INT33C1", LPSS_ADDR(lpt_dev_desc) },
- { "INT33C2", LPSS_ADDR(lpt_i2c_dev_desc) },
- { "INT33C3", LPSS_ADDR(lpt_i2c_dev_desc) },
- { "INT33C4", LPSS_ADDR(lpt_uart_dev_desc) },
- { "INT33C5", LPSS_ADDR(lpt_uart_dev_desc) },
- { "INT33C6", LPSS_ADDR(lpt_sdio_dev_desc) },
- { "INT33C7", },
-
- /* BayTrail LPSS devices */
- { "80860F09", LPSS_ADDR(byt_pwm_dev_desc) },
- { "80860F0A", LPSS_ADDR(byt_uart_dev_desc) },
- { "80860F0E", LPSS_ADDR(byt_spi_dev_desc) },
- { "80860F14", LPSS_ADDR(byt_sdio_dev_desc) },
- { "80860F41", LPSS_ADDR(byt_i2c_dev_desc) },
- { "INT33B2", },
- { "INT33FC", },
-
- /* Braswell LPSS devices */
- { "80862288", LPSS_ADDR(byt_pwm_dev_desc) },
- { "8086228A", LPSS_ADDR(byt_uart_dev_desc) },
- { "8086228E", LPSS_ADDR(byt_spi_dev_desc) },
- { "808622C1", LPSS_ADDR(byt_i2c_dev_desc) },
-
- { "INT3430", LPSS_ADDR(lpt_dev_desc) },
- { "INT3431", LPSS_ADDR(lpt_dev_desc) },
- { "INT3432", LPSS_ADDR(lpt_i2c_dev_desc) },
- { "INT3433", LPSS_ADDR(lpt_i2c_dev_desc) },
- { "INT3434", LPSS_ADDR(lpt_uart_dev_desc) },
- { "INT3435", LPSS_ADDR(lpt_uart_dev_desc) },
- { "INT3436", LPSS_ADDR(lpt_sdio_dev_desc) },
- { "INT3437", },
+static void acpi_lpss_set_ltr(struct device *dev, s32 val)
+{
+ struct acpi_soc_dev_private_data *pdata;
+ u32 ltr_mode, ltr_val;
- /* Wildcat Point LPSS devices */
- { "INT3438", LPSS_ADDR(lpt_dev_desc) },
+ pdata = acpi_driver_data(ACPI_COMPANION(dev));
+ ltr_mode = __lpss_reg_read(pdata, LPSS_GENERAL);
+ if (val < 0) {
+ if (ltr_mode & LPSS_GENERAL_LTR_MODE_SW) {
+ ltr_mode &= ~LPSS_GENERAL_LTR_MODE_SW;
+ __lpss_reg_write(ltr_mode, pdata, LPSS_GENERAL);
+ }
+ return;
+ }
+ ltr_val = __lpss_reg_read(pdata, LPSS_SW_LTR) & ~LPSS_LTR_SNOOP_MASK;
+ if (val >= LPSS_LTR_SNOOP_LAT_CUTOFF) {
+ ltr_val |= LPSS_LTR_SNOOP_LAT_32US;
+ val = LPSS_LTR_MAX_VAL;
+ } else if (val > LPSS_LTR_MAX_VAL) {
+ ltr_val |= LPSS_LTR_SNOOP_LAT_32US | LPSS_LTR_SNOOP_REQ;
+ val >>= LPSS_LTR_SNOOP_LAT_SHIFT;
+ } else {
+ ltr_val |= LPSS_LTR_SNOOP_LAT_1US | LPSS_LTR_SNOOP_REQ;
+ }
+ ltr_val |= val;
+ __lpss_reg_write(ltr_val, pdata, LPSS_SW_LTR);
+ if (!(ltr_mode & LPSS_GENERAL_LTR_MODE_SW)) {
+ ltr_mode |= LPSS_GENERAL_LTR_MODE_SW;
+ __lpss_reg_write(ltr_mode, pdata, LPSS_GENERAL);
+ }
+}
- { }
-};
+static void acpi_lpss_bind(struct acpi_soc_dev_private_data *pdata,
+ struct device *dev)
+{
+ if (!pdata || !pdata->mmio_base || !(pdata->dev_desc->flags & LPSS_LTR))
+ return;
-#ifdef CONFIG_X86_INTEL_LPSS
+ if (pdata->mmio_size >= pdata->dev_desc->prv_offset + LPSS_LTR_SIZE)
+ dev->power.set_latency_tolerance = acpi_lpss_set_ltr;
+ else
+ dev_err(dev, "MMIO size insufficient to access LTR\n");
+}
-static int is_memory(struct acpi_resource *res, void *not_used)
+static void acpi_lpss_unbind(struct acpi_soc_dev_private_data *pdata,
+ struct device *dev)
{
- struct resource r;
- return !acpi_dev_resource_memory(res, &r);
+ dev->power.set_latency_tolerance = NULL;
}
/* LPSS main clock device. */
@@ -239,9 +141,9 @@ static inline void lpt_register_clock_device(void)
}
static int register_device_clock(struct acpi_device *adev,
- struct lpss_private_data *pdata)
+ struct acpi_soc_dev_private_data *pdata)
{
- const struct lpss_device_desc *dev_desc = pdata->dev_desc;
+ struct acpi_soc_dev_desc *dev_desc = pdata->dev_desc;
const char *devname = dev_name(&adev->dev);
struct clk *clk = ERR_PTR(-ENODEV);
struct lpss_clk_data *clk_data;
@@ -263,9 +165,9 @@ static int register_device_clock(struct acpi_device *adev,
parent = clk_data->name;
prv_base = pdata->mmio_base + dev_desc->prv_offset;
- if (pdata->fixed_clk_rate) {
+ if (dev_desc->fixed_clk_rate) {
clk = clk_register_fixed_rate(NULL, devname, parent, 0,
- pdata->fixed_clk_rate);
+ dev_desc->fixed_clk_rate);
goto out;
}
@@ -303,105 +205,202 @@ out:
if (IS_ERR(clk))
return PTR_ERR(clk);
- pdata->clk = clk;
+ dev_desc->clk = clk;
clk_register_clkdev(clk, NULL, devname);
return 0;
}
-static int acpi_lpss_create_device(struct acpi_device *adev,
- const struct acpi_device_id *id)
+static int lpss_common_setup(struct acpi_soc_dev_private_data *pdata)
{
- struct lpss_device_desc *dev_desc;
- struct lpss_private_data *pdata;
- struct resource_list_entry *rentry;
- struct list_head resource_list;
- struct platform_device *pdev;
- int ret;
-
- dev_desc = (struct lpss_device_desc *)id->driver_data;
- if (!dev_desc) {
- pdev = acpi_create_platform_device(adev);
- return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
- }
- pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
- return -ENOMEM;
-
- INIT_LIST_HEAD(&resource_list);
- ret = acpi_dev_get_resources(adev, &resource_list, is_memory, NULL);
- if (ret < 0)
- goto err_out;
-
- list_for_each_entry(rentry, &resource_list, node)
- if (resource_type(&rentry->res) == IORESOURCE_MEM) {
- if (dev_desc->prv_size_override)
- pdata->mmio_size = dev_desc->prv_size_override;
- else
- pdata->mmio_size = resource_size(&rentry->res);
- pdata->mmio_base = ioremap(rentry->res.start,
- pdata->mmio_size);
- break;
- }
+ struct acpi_soc_dev_desc *dev_desc;
+ int ret = 0;
- acpi_dev_free_resource_list(&resource_list);
+ dev_desc = pdata->dev_desc;
- pdata->dev_desc = dev_desc;
+ if (dev_desc->flags & LPSS_CLK)
+ ret = register_device_clock(pdata->adev, pdata);
- if (dev_desc->setup)
- dev_desc->setup(pdata);
-
- if (dev_desc->flags & LPSS_CLK) {
- ret = register_device_clock(adev, pdata);
- if (ret) {
- /* Skip the device, but continue the namespace scan. */
- ret = 0;
- goto err_out;
- }
- }
+ return ret;
+}
+static int lpss_proxy_dev_post_setup(struct acpi_soc_dev_private_data *pdata)
+{
/*
- * This works around a known issue in ACPI tables where LPSS devices
- * have _PS0 and _PS3 without _PSC (and no power resources), so
- * acpi_bus_init_power() will assume that the BIOS has put them into D0.
+ * proxy_device can be set by bind.
+ * But post_setup may be a more flexible interface.
*/
- ret = acpi_device_fix_up_power(adev);
- if (ret) {
- /* Skip the device, but continue the namespace scan. */
- ret = 0;
- goto err_out;
- }
-
- adev->driver_data = pdata;
- pdev = acpi_create_platform_device(adev);
- if (!IS_ERR_OR_NULL(pdev)) {
- if (!proxy_device && dev_desc->flags & LPSS_DEV_PROXY)
- proxy_device = &pdev->dev;
- return 1;
- }
+ if (!proxy_device && pdata->dev_desc->flags & LPSS_DEV_PROXY)
+ proxy_device = &pdata->pdev->dev;
- ret = PTR_ERR(pdev);
- adev->driver_data = NULL;
-
- err_out:
- kfree(pdata);
- return ret;
+ return 0;
}
-static u32 __lpss_reg_read(struct lpss_private_data *pdata, unsigned int reg)
+static int byt_i2c_setup(struct acpi_soc_dev_private_data *pdata)
{
- return readl(pdata->mmio_base + pdata->dev_desc->prv_offset + reg);
+ unsigned int offset;
+ u32 val;
+
+ offset = pdata->dev_desc->prv_offset + LPSS_RESETS;
+ val = readl(pdata->mmio_base + offset);
+ val |= LPSS_RESETS_RESET_APB | LPSS_RESETS_RESET_FUNC;
+ writel(val, pdata->mmio_base + offset);
+
+ if (readl(pdata->mmio_base + pdata->dev_desc->prv_offset))
+ pdata->dev_desc->fixed_clk_rate = 133000000;
+
+ return lpss_common_setup(pdata);
}
-static void __lpss_reg_write(u32 val, struct lpss_private_data *pdata,
- unsigned int reg)
+static int lpss_uart_setup(struct acpi_soc_dev_private_data *pdata)
{
- writel(val, pdata->mmio_base + pdata->dev_desc->prv_offset + reg);
+ unsigned int offset;
+ u32 val;
+
+ offset = pdata->dev_desc->prv_offset + LPSS_TX_INT;
+ val = readl(pdata->mmio_base + offset);
+ writel(val | LPSS_TX_INT_MASK, pdata->mmio_base + offset);
+
+ val = readl(pdata->mmio_base + LPSS_UART_CPR);
+ if (!(val & LPSS_UART_CPR_AFCE)) {
+ offset = pdata->dev_desc->prv_offset + LPSS_GENERAL;
+ val = readl(pdata->mmio_base + offset);
+ val |= LPSS_GENERAL_UART_RTS_OVRD;
+ writel(val, pdata->mmio_base + offset);
+ }
+
+ return lpss_common_setup(pdata);
}
+static struct acpi_soc_dev_desc lpss_dma_desc = {
+ .flags = LPSS_CLK | LPSS_PROXY_REQ,
+ .setup = lpss_common_setup,
+};
+
+static struct acpi_soc_dev_desc lpt_dev_desc = {
+ .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | ACPI_SOC_SYSFS
+ | LPSS_LTR,
+ .prv_offset = 0x800,
+ .setup = lpss_common_setup,
+ .bind = acpi_lpss_bind,
+ .unbind = acpi_lpss_unbind,
+};
+
+static struct acpi_soc_dev_desc lpt_i2c_dev_desc = {
+ .flags = LPSS_CLK | LPSS_CLK_GATE | ACPI_SOC_SYSFS | LPSS_LTR,
+ .prv_offset = 0x800,
+ .setup = lpss_common_setup,
+ .bind = acpi_lpss_bind,
+ .unbind = acpi_lpss_unbind,
+};
+
+static struct acpi_soc_dev_desc lpt_uart_dev_desc = {
+ .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_LTR
+ | ACPI_SOC_SYSFS,
+ .prv_offset = 0x800,
+ .setup = lpss_uart_setup,
+ .bind = acpi_lpss_bind,
+ .unbind = acpi_lpss_unbind,
+};
+
+static struct acpi_soc_dev_desc lpt_sdio_dev_desc = {
+ .flags = LPSS_LTR | ACPI_SOC_SYSFS,
+ .prv_offset = 0x1000,
+ .mem_size_override = 0x1018,
+ .setup = lpss_common_setup,
+ .bind = acpi_lpss_bind,
+ .unbind = acpi_lpss_unbind,
+};
+
+static struct acpi_soc_dev_desc byt_pwm_dev_desc = {
+ .flags = ACPI_SOC_PM | LPSS_SAVE_CTX,
+ .setup = lpss_common_setup,
+};
+
+static struct acpi_soc_dev_desc byt_uart_dev_desc = {
+ .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | ACPI_SOC_PM
+ | LPSS_SAVE_CTX | LPSS_DEV_PROXY,
+ .prv_offset = 0x800,
+ .setup = lpss_uart_setup,
+ .post_setup = lpss_proxy_dev_post_setup,
+};
+
+static struct acpi_soc_dev_desc byt_spi_dev_desc = {
+ .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | ACPI_SOC_PM
+ | LPSS_SAVE_CTX | LPSS_DEV_PROXY,
+ .prv_offset = 0x400,
+ .setup = lpss_common_setup,
+ .post_setup = lpss_proxy_dev_post_setup,
+};
+
+static struct acpi_soc_dev_desc byt_sdio_dev_desc = {
+ .flags = LPSS_CLK | LPSS_DEV_PROXY,
+ .setup = lpss_common_setup,
+ .post_setup = lpss_proxy_dev_post_setup,
+};
+
+static struct acpi_soc_dev_desc byt_i2c_dev_desc = {
+ .flags = LPSS_CLK | ACPI_SOC_PM | LPSS_SAVE_CTX | LPSS_DEV_PROXY,
+ .prv_offset = 0x800,
+ .setup = byt_i2c_setup,
+ .post_setup = lpss_proxy_dev_post_setup,
+};
+
+#else
+
+#define LPSS_ADDR(desc) (0UL)
+
+#endif /* CONFIG_X86_INTEL_LPSS */
+
+static struct acpi_device_id acpi_lpss_device_ids[] = {
+ /* Generic LPSS devices */
+ { "INTL9C60", LPSS_ADDR(lpss_dma_desc) },
+
+ /* Lynxpoint LPSS devices */
+ { "INT33C0", LPSS_ADDR(lpt_dev_desc) },
+ { "INT33C1", LPSS_ADDR(lpt_dev_desc) },
+ { "INT33C2", LPSS_ADDR(lpt_i2c_dev_desc) },
+ { "INT33C3", LPSS_ADDR(lpt_i2c_dev_desc) },
+ { "INT33C4", LPSS_ADDR(lpt_uart_dev_desc) },
+ { "INT33C5", LPSS_ADDR(lpt_uart_dev_desc) },
+ { "INT33C6", LPSS_ADDR(lpt_sdio_dev_desc) },
+ { "INT33C7", },
+
+ /* BayTrail LPSS devices */
+ { "80860F09", LPSS_ADDR(byt_pwm_dev_desc) },
+ { "80860F0A", LPSS_ADDR(byt_uart_dev_desc) },
+ { "80860F0E", LPSS_ADDR(byt_spi_dev_desc) },
+ { "80860F14", LPSS_ADDR(byt_sdio_dev_desc) },
+ { "80860F41", LPSS_ADDR(byt_i2c_dev_desc) },
+ { "INT33B2", },
+ { "INT33FC", },
+
+ /* Braswell LPSS devices */
+ { "80862288", LPSS_ADDR(byt_pwm_dev_desc) },
+ { "8086228A", LPSS_ADDR(byt_uart_dev_desc) },
+ { "8086228E", LPSS_ADDR(byt_spi_dev_desc) },
+ { "808622C1", LPSS_ADDR(byt_i2c_dev_desc) },
+
+ { "INT3430", LPSS_ADDR(lpt_dev_desc) },
+ { "INT3431", LPSS_ADDR(lpt_dev_desc) },
+ { "INT3432", LPSS_ADDR(lpt_i2c_dev_desc) },
+ { "INT3433", LPSS_ADDR(lpt_i2c_dev_desc) },
+ { "INT3434", LPSS_ADDR(lpt_uart_dev_desc) },
+ { "INT3435", LPSS_ADDR(lpt_uart_dev_desc) },
+ { "INT3436", LPSS_ADDR(lpt_sdio_dev_desc) },
+ { "INT3437", },
+
+ /* Wildcat Point LPSS devices */
+ { "INT3438", LPSS_ADDR(lpt_dev_desc) },
+
+ { }
+};
+
+#ifdef CONFIG_X86_INTEL_LPSS
+
static int lpss_reg_read(struct device *dev, unsigned int reg, u32 *val)
{
+ struct acpi_soc_dev_private_data *pdata;
struct acpi_device *adev;
- struct lpss_private_data *pdata;
unsigned long flags;
int ret;
@@ -472,37 +471,6 @@ static struct attribute_group lpss_attr_group = {
.name = "lpss_ltr",
};
-static void acpi_lpss_set_ltr(struct device *dev, s32 val)
-{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
- u32 ltr_mode, ltr_val;
-
- ltr_mode = __lpss_reg_read(pdata, LPSS_GENERAL);
- if (val < 0) {
- if (ltr_mode & LPSS_GENERAL_LTR_MODE_SW) {
- ltr_mode &= ~LPSS_GENERAL_LTR_MODE_SW;
- __lpss_reg_write(ltr_mode, pdata, LPSS_GENERAL);
- }
- return;
- }
- ltr_val = __lpss_reg_read(pdata, LPSS_SW_LTR) & ~LPSS_LTR_SNOOP_MASK;
- if (val >= LPSS_LTR_SNOOP_LAT_CUTOFF) {
- ltr_val |= LPSS_LTR_SNOOP_LAT_32US;
- val = LPSS_LTR_MAX_VAL;
- } else if (val > LPSS_LTR_MAX_VAL) {
- ltr_val |= LPSS_LTR_SNOOP_LAT_32US | LPSS_LTR_SNOOP_REQ;
- val >>= LPSS_LTR_SNOOP_LAT_SHIFT;
- } else {
- ltr_val |= LPSS_LTR_SNOOP_LAT_1US | LPSS_LTR_SNOOP_REQ;
- }
- ltr_val |= val;
- __lpss_reg_write(ltr_val, pdata, LPSS_SW_LTR);
- if (!(ltr_mode & LPSS_GENERAL_LTR_MODE_SW)) {
- ltr_mode |= LPSS_GENERAL_LTR_MODE_SW;
- __lpss_reg_write(ltr_mode, pdata, LPSS_GENERAL);
- }
-}
-
#ifdef CONFIG_PM
/**
* acpi_lpss_save_ctx() - Save the private registers of LPSS device
@@ -514,7 +482,7 @@ static void acpi_lpss_set_ltr(struct device *dev, s32 val)
* prv_reg_ctx array.
*/
static void acpi_lpss_save_ctx(struct device *dev,
- struct lpss_private_data *pdata)
+ struct acpi_soc_dev_private_data *pdata)
{
unsigned int i;
@@ -535,7 +503,7 @@ static void acpi_lpss_save_ctx(struct device *dev,
* Restores the registers that were previously stored with acpi_lpss_save_ctx().
*/
static void acpi_lpss_restore_ctx(struct device *dev,
- struct lpss_private_data *pdata)
+ struct acpi_soc_dev_private_data *pdata)
{
unsigned int i;
@@ -559,9 +527,10 @@ static void acpi_lpss_restore_ctx(struct device *dev,
#ifdef CONFIG_PM_SLEEP
static int acpi_lpss_suspend_late(struct device *dev)
{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
+ struct acpi_soc_dev_private_data *pdata;
int ret;
+ pdata = acpi_driver_data(ACPI_COMPANION(dev));
ret = pm_generic_suspend_late(dev);
if (ret)
return ret;
@@ -574,9 +543,10 @@ static int acpi_lpss_suspend_late(struct device *dev)
static int acpi_lpss_resume_early(struct device *dev)
{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
+ struct acpi_soc_dev_private_data *pdata;
int ret;
+ pdata = acpi_driver_data(ACPI_COMPANION(dev));
ret = acpi_dev_resume_early(dev);
if (ret)
return ret;
@@ -590,9 +560,10 @@ static int acpi_lpss_resume_early(struct device *dev)
static int acpi_lpss_runtime_suspend(struct device *dev)
{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
+ struct acpi_soc_dev_private_data *pdata;
int ret;
+ pdata = acpi_driver_data(ACPI_COMPANION(dev));
ret = pm_generic_runtime_suspend(dev);
if (ret)
return ret;
@@ -612,9 +583,10 @@ static int acpi_lpss_runtime_suspend(struct device *dev)
static int acpi_lpss_runtime_resume(struct device *dev)
{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
+ struct acpi_soc_dev_private_data *pdata;
int ret;
+ pdata = acpi_driver_data(ACPI_COMPANION(dev));
if (pdata->dev_desc->flags & LPSS_PROXY_REQ && proxy_device) {
ret = pm_runtime_get_sync(proxy_device);
if (ret)
@@ -652,96 +624,22 @@ static struct dev_pm_domain acpi_lpss_pm_domain = {
},
};
-static int acpi_lpss_platform_notify(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct platform_device *pdev = to_platform_device(data);
- struct lpss_private_data *pdata;
- struct acpi_device *adev;
- const struct acpi_device_id *id;
-
- id = acpi_match_device(acpi_lpss_device_ids, &pdev->dev);
- if (!id || !id->driver_data)
- return 0;
-
- if (acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev))
- return 0;
-
- pdata = acpi_driver_data(adev);
- if (!pdata)
- return 0;
-
- if (pdata->mmio_base &&
- pdata->mmio_size < pdata->dev_desc->prv_offset + LPSS_LTR_SIZE) {
- dev_err(&pdev->dev, "MMIO size insufficient to access LTR\n");
- return 0;
- }
-
- switch (action) {
- case BUS_NOTIFY_ADD_DEVICE:
- pdev->dev.pm_domain = &acpi_lpss_pm_domain;
- if (pdata->dev_desc->flags & LPSS_LTR)
- return sysfs_create_group(&pdev->dev.kobj,
- &lpss_attr_group);
- break;
- case BUS_NOTIFY_DEL_DEVICE:
- if (pdata->dev_desc->flags & LPSS_LTR)
- sysfs_remove_group(&pdev->dev.kobj, &lpss_attr_group);
- pdev->dev.pm_domain = NULL;
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static struct notifier_block acpi_lpss_nb = {
- .notifier_call = acpi_lpss_platform_notify,
-};
-
-static void acpi_lpss_bind(struct device *dev)
-{
- struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
-
- if (!pdata || !pdata->mmio_base || !(pdata->dev_desc->flags & LPSS_LTR))
- return;
-
- if (pdata->mmio_size >= pdata->dev_desc->prv_offset + LPSS_LTR_SIZE)
- dev->power.set_latency_tolerance = acpi_lpss_set_ltr;
- else
- dev_err(dev, "MMIO size insufficient to access LTR\n");
-}
-
-static void acpi_lpss_unbind(struct device *dev)
-{
- dev->power.set_latency_tolerance = NULL;
-}
-
-static struct acpi_scan_handler lpss_handler = {
- .ids = acpi_lpss_device_ids,
- .attach = acpi_lpss_create_device,
- .bind = acpi_lpss_bind,
- .unbind = acpi_lpss_unbind,
-};
-
void __init acpi_lpss_init(void)
{
if (!lpt_clk_init()) {
- bus_register_notifier(&platform_bus_type, &acpi_lpss_nb);
- acpi_scan_add_handler(&lpss_handler);
+ a_soc.ids = acpi_lpss_device_ids;
+ a_soc.attr_group = &lpss_attr_group;
+ a_soc.pm_domain = &acpi_lpss_pm_domain;
+ register_acpi_soc(&a_soc, false);
}
}
#else
-static struct acpi_scan_handler lpss_handler = {
- .ids = acpi_lpss_device_ids,
-};
-
void __init acpi_lpss_init(void)
{
- acpi_scan_add_handler(&lpss_handler);
+ a_soc.ids = acpi_lpss_device_ids;
+ register_acpi_soc(&a_soc, true);
}
#endif /* CONFIG_X86_INTEL_LPSS */
--
1.9.1
--
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