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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-02 22:43:38 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-02 22:43:38 +0200
commit3883cbb6c1bda013a3ce2dbdab7dc97c52e4a232 (patch)
tree5b69f83b049d24ac81123ac954ca8c9128e48443 /arch/arm/mach-u300/regulator.c
parentMerge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
parentARM: integrator: let pciv3 use mem/premem from device tree (diff)
downloadlinux-3883cbb6c1bda013a3ce2dbdab7dc97c52e4a232.tar.xz
linux-3883cbb6c1bda013a3ce2dbdab7dc97c52e4a232.zip
Merge tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC specific changes from Arnd Bergmann: "These changes are all to SoC-specific code, a total of 33 branches on 17 platforms were pulled into this. Like last time, Renesas sh-mobile is now the platform with the most changes, followed by OMAP and EXYNOS. Two new platforms, TI Keystone and Rockchips RK3xxx are added in this branch, both containing almost no platform specific code at all, since they are using generic subsystem interfaces for clocks, pinctrl, interrupts etc. The device drivers are getting merged through the respective subsystem maintainer trees. One more SoC (u300) is now multiplatform capable and several others (shmobile, exynos, msm, integrator, kirkwood, clps711x) are moving towards that goal with this series but need more work. Also noteworthy is the work on PCI here, which is traditionally part of the SoC specific code. With the changes done by Thomas Petazzoni, we can now more easily have PCI host controller drivers as loadable modules and keep them separate from the platform code in drivers/pci/host. This has already led to the discovery that three platforms (exynos, spear and imx) are actually using an identical PCIe host controller and will be able to share a driver once support for spear and imx is added." * tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (480 commits) ARM: integrator: let pciv3 use mem/premem from device tree ARM: integrator: set local side PCI addresses right ARM: dts: Add pcie controller node for exynos5440-ssdk5440 ARM: dts: Add pcie controller node for Samsung EXYNOS5440 SoC ARM: EXYNOS: Enable PCIe support for Exynos5440 pci: Add PCIe driver for Samsung Exynos ARM: OMAP5: voltagedomain data: remove temporary OMAP4 voltage data ARM: keystone: Move CPU bringup code to dedicated asm file ARM: multiplatform: always pick one CPU type ARM: imx: select syscon for IMX6SL ARM: keystone: select ARM_ERRATA_798181 only for SMP ARM: imx: Synertronixx scb9328 needs to select SOC_IMX1 ARM: OMAP2+: AM43x: resolve SMP related build error dmaengine: edma: enable build for AM33XX ARM: edma: Add EDMA crossbar event mux support ARM: edma: Add DT and runtime PM support to the private EDMA API dmaengine: edma: Add TI EDMA device tree binding arm: add basic support for Rockchip RK3066a boards arm: add debug uarts for rockchip rk29xx and rk3xxx series arm: Add basic clocks for Rockchip rk3066a SoCs ...
Diffstat (limited to 'arch/arm/mach-u300/regulator.c')
-rw-r--r--arch/arm/mach-u300/regulator.c67
1 files changed, 56 insertions, 11 deletions
diff --git a/arch/arm/mach-u300/regulator.c b/arch/arm/mach-u300/regulator.c
index 9c53f01c62eb..bf40cd478fe9 100644
--- a/arch/arm/mach-u300/regulator.c
+++ b/arch/arm/mach-u300/regulator.c
@@ -10,11 +10,18 @@
#include <linux/device.h>
#include <linux/signal.h>
#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
#include <linux/regulator/consumer.h>
-/* Those are just for writing in syscon */
-#include <linux/io.h>
-#include <mach/hardware.h>
-#include <mach/syscon.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+/* Power Management Control 16bit (R/W) */
+#define U300_SYSCON_PMCR (0x50)
+#define U300_SYSCON_PMCR_DCON_ENABLE (0x0002)
+#define U300_SYSCON_PMCR_PWR_MGNT_ENABLE (0x0001)
/*
* Regulators that power the board and chip and which are
@@ -47,13 +54,28 @@ void u300_pm_poweroff(void)
/*
* Hog the regulators needed to power up the board.
*/
-static int __init u300_init_boardpower(void)
+static int __init __u300_init_boardpower(struct platform_device *pdev)
{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *syscon_np;
+ struct regmap *regmap;
int err;
- u32 val;
pr_info("U300: setting up board power\n");
- main_power_15 = regulator_get(NULL, "vana15");
+
+ syscon_np = of_parse_phandle(np, "syscon", 0);
+ if (!syscon_np) {
+ pr_crit("U300: no syscon node\n");
+ return -ENODEV;
+ }
+ regmap = syscon_node_to_regmap(syscon_np);
+ if (!regmap) {
+ pr_crit("U300: could not locate syscon regmap\n");
+ return -ENODEV;
+ }
+
+ main_power_15 = regulator_get(&pdev->dev, "vana15");
+
if (IS_ERR(main_power_15)) {
pr_err("could not get vana15");
return PTR_ERR(main_power_15);
@@ -72,9 +94,8 @@ static int __init u300_init_boardpower(void)
* the rest of the U300 power management is implemented.
*/
pr_info("U300: disable system controller pull-up\n");
- val = readw(U300_SYSCON_VBASE + U300_SYSCON_PMCR);
- val &= ~U300_SYSCON_PMCR_DCON_ENABLE;
- writew(val, U300_SYSCON_VBASE + U300_SYSCON_PMCR);
+ regmap_update_bits(regmap, U300_SYSCON_PMCR,
+ U300_SYSCON_PMCR_DCON_ENABLE, 0);
/* Register globally exported PM poweroff hook */
pm_power_off = u300_pm_poweroff;
@@ -82,7 +103,31 @@ static int __init u300_init_boardpower(void)
return 0;
}
+static int __init s365_board_probe(struct platform_device *pdev)
+{
+ return __u300_init_boardpower(pdev);
+}
+
+static const struct of_device_id s365_board_match[] = {
+ { .compatible = "stericsson,s365" },
+ {},
+};
+
+static struct platform_driver s365_board_driver = {
+ .driver = {
+ .name = "s365-board",
+ .owner = THIS_MODULE,
+ .of_match_table = s365_board_match,
+ },
+};
+
/*
* So at module init time we hog the regulator!
*/
-module_init(u300_init_boardpower);
+static int __init u300_init_boardpower(void)
+{
+ return platform_driver_probe(&s365_board_driver,
+ s365_board_probe);
+}
+
+device_initcall(u300_init_boardpower);