pinctrl: rockchip: let pmu registers be supplied by a syscon
From: Heiko Stuebner <heiko@...> Date: Tue, 29 Apr 2014 21:10:45 +0200
Commit-Message
Currently the pmu registers containing pin pull settings on the rk3188 are mapped locally when bank0 is instantiated. Add an alternative that can resolve the pmu from a syscon phandle. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
drivers/pinctrl/pinctrl-rockchip.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-)
Statistics
- 15 lines added
- 2 lines removed
Changes
---------------------- drivers/pinctrl/pinctrl-rockchip.c ----------------------
index b67771d..11ad643 100644
@@ -38,6 +38,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/clk.h>
#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
#include <dt-bindings/pinctrl/rockchip.h>
#include "core.h"
@@ -164,6 +165,7 @@ struct rockchip_pinctrl {
struct regmap *regmap_base;
int reg_size;
struct regmap *regmap_pull;
+ struct regmap *regmap_pmu;
struct device *dev;
struct rockchip_pin_ctrl *ctrl;
struct pinctrl_desc pctl;
@@ -438,6 +440,7 @@ static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
#define RK3188_PULL_BITS_PER_PIN 2
#define RK3188_PULL_PINS_PER_REG 8
#define RK3188_PULL_BANK_STRIDE 16
+#define RK3188_PULL_PMU_OFFSET 0x64
static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
@@ -447,8 +450,9 @@ static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
/* The first 12 pins of the first bank are located elsewhere */
if (bank->bank_type == RK3188_BANK0 && pin_num < 12) {
+ *regmap = info->regmap_pmu ? info->regmap_pmu
+ : bank->regmap_pull;
+ *reg = info->regmap_pmu ? RK3188_PULL_PMU_OFFSET : 0;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = pin_num % RK3188_PULL_PINS_PER_REG;
*bit *= RK3188_PULL_BITS_PER_PIN;
@@ -1539,6 +1543,7 @@ static int rockchip_pinctrl_probe(struct platform_device *pdev)
struct rockchip_pinctrl *info;
struct device *dev = &pdev->dev;
struct rockchip_pin_ctrl *ctrl;
+ struct device_node *np = pdev->dev.of_node, *node;
struct resource *res;
void __iomem *base;
int ret;
@@ -1587,6 +1592,14 @@ static int rockchip_pinctrl_probe(struct platform_device *pdev)
&rockchip_regmap_config);
}
+ /* try to find the optional reference to the pmu syscon */
+ node = of_parse_phandle(np, "rockchip,pmu", 0);
+ if (node) {
+ info->regmap_pmu = syscon_node_to_regmap(node);
+ if (IS_ERR(info->regmap_pmu))
+ return PTR_ERR(info->regmap_pmu);
+ }
+
ret = rockchip_gpiolib_register(pdev, info);
if (ret)
return ret;