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vexpress: Move setting master site to vexpress-config bus 

There's only a single caller of vexpress_config_set_master() from
vexpress-sysreg.c. Let's just make the registers needed available to
vexpress-config and move all the code there. The registers needed aren't
used anywhere else either. With this, we can get rid of the private API
between these 2 drivers.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Rob Herring 2020-04-29 15:58:23 -05:00
parent a5a38765ac
commit 310f80d617
3 changed files with 34 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/bus/vexpress-config.c
View File

@ -14,9 +14,17 @@
#include <linux/slab.h>
#include <linux/vexpress.h>
#define SYS_CFGDATA 0x0
#define SYS_MISC 0x0
#define SYS_MISC_MASTERSITE (1 << 14)
#define SYS_CFGCTRL 0x4
#define SYS_PROCID0 0x24
#define SYS_PROCID1 0x28
#define SYS_HBI_MASK 0xfff
#define SYS_PROCIDx_HBI_SHIFT 0
#define SYS_CFGDATA 0x40
#define SYS_CFGCTRL 0x44
#define SYS_CFGCTRL_START (1 << 31)
#define SYS_CFGCTRL_WRITE (1 << 30)
#define SYS_CFGCTRL_DCC(n) (((n) & 0xf) << 26)
@ -25,10 +33,14 @@
#define SYS_CFGCTRL_POSITION(n) (((n) & 0xf) << 12)
#define SYS_CFGCTRL_DEVICE(n) (((n) & 0xfff) << 0)
#define SYS_CFGSTAT 0x8
#define SYS_CFGSTAT 0x48
#define SYS_CFGSTAT_ERR (1 << 1)
#define SYS_CFGSTAT_COMPLETE (1 << 0)
#define VEXPRESS_SITE_MB 0
#define VEXPRESS_SITE_DB1 1
#define VEXPRESS_SITE_DB2 2
#define VEXPRESS_SITE_MASTER 0xf
struct vexpress_syscfg {
struct device *dev;
@ -59,7 +71,7 @@ static DEFINE_MUTEX(vexpress_config_mutex);
static u32 vexpress_config_site_master = VEXPRESS_SITE_MASTER;
void vexpress_config_set_master(u32 site)
static void vexpress_config_set_master(u32 site)
{
vexpress_config_site_master = site;
}
@ -340,6 +352,8 @@ static int vexpress_syscfg_probe(struct platform_device *pdev)
struct resource *res;
struct vexpress_config_bridge *bridge;
struct device_node *node;
int master;
u32 dt_hbi;
syscfg = devm_kzalloc(&pdev->dev, sizeof(*syscfg), GFP_KERNEL);
if (!syscfg)
@ -361,6 +375,21 @@ static int vexpress_syscfg_probe(struct platform_device *pdev)
dev_set_drvdata(&pdev->dev, bridge);
master = readl(syscfg->base + SYS_MISC) & SYS_MISC_MASTERSITE ?
VEXPRESS_SITE_DB2 : VEXPRESS_SITE_DB1;
vexpress_config_set_master(master);
/* Confirm board type against DT property, if available */
if (of_property_read_u32(of_root, "arm,hbi", &dt_hbi) == 0) {
u32 id = readl(syscfg->base + (master == VEXPRESS_SITE_DB1 ?
SYS_PROCID0 : SYS_PROCID1));
u32 hbi = (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK;
if (WARN_ON(dt_hbi != hbi))
dev_warn(&pdev->dev, "DT HBI (%x) is not matching hardware (%x)!\n",
dt_hbi, hbi);
}
for_each_compatible_node(node, NULL, "arm,vexpress,config-bus") {
struct device_node *bridge_np;

25
drivers/mfd/vexpress-sysreg.c
View File

@ -14,7 +14,6 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/vexpress.h>
#define SYS_ID 0x000
#define SYS_SW 0x004
@ -37,11 +36,6 @@
#define SYS_CFGCTRL 0x0a4
#define SYS_CFGSTAT 0x0a8
#define SYS_HBI_MASK 0xfff
#define SYS_PROCIDx_HBI_SHIFT 0
#define SYS_MISC_MASTERSITE (1 << 14)
/* The sysreg block is just a random collection of various functions... */
static struct bgpio_pdata vexpress_sysreg_sys_led_pdata = {
@ -94,7 +88,7 @@ static struct mfd_cell vexpress_sysreg_cells[] = {
.name = "vexpress-syscfg",
.num_resources = 1,
.resources = (struct resource []) {
DEFINE_RES_MEM(SYS_CFGDATA, 0xc),
DEFINE_RES_MEM(SYS_MISC, 0x4c),
},
}
};
@ -104,8 +98,6 @@ static int vexpress_sysreg_probe(struct platform_device *pdev)
struct resource *mem;
void __iomem *base;
struct gpio_chip *mmc_gpio_chip;
int master;
u32 dt_hbi;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem)
@ -115,21 +107,6 @@ static int vexpress_sysreg_probe(struct platform_device *pdev)
if (!base)
return -ENOMEM;
master = readl(base + SYS_MISC) & SYS_MISC_MASTERSITE ?
VEXPRESS_SITE_DB2 : VEXPRESS_SITE_DB1;
vexpress_config_set_master(master);
/* Confirm board type against DT property, if available */
if (of_property_read_u32(of_root, "arm,hbi", &dt_hbi) == 0) {
u32 id = readl(base + (master == VEXPRESS_SITE_DB1 ?
SYS_PROCID0 : SYS_PROCID1));
u32 hbi = (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK;
if (WARN_ON(dt_hbi != hbi))
dev_warn(&pdev->dev, "DT HBI (%x) is not matching hardware (%x)!\n",
dt_hbi, hbi);
}
/*
* Duplicated SYS_MCI pseudo-GPIO controller for compatibility with
* older trees using sysreg node for MMC control lines.

9
include/linux/vexpress.h
View File

@ -10,15 +10,6 @@
#include <linux/device.h>
#include <linux/regmap.h>
#define VEXPRESS_SITE_MB 0
#define VEXPRESS_SITE_DB1 1
#define VEXPRESS_SITE_DB2 2
#define VEXPRESS_SITE_MASTER 0xf
/* Config infrastructure */
void vexpress_config_set_master(u32 site);
/* Config regmap API */
struct regmap *devm_regmap_init_vexpress_config(struct device *dev);