mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
b3a33077c0
This is part of an ongoing process to migrate from ARCH_SHMOBILE to ARCH_RENESAS the motivation for which being that RENESAS seems to be a more appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs. Along with the above mentioned Kconfig changes it seems appropriate to also rename directories that only hold drivers for such SoCs. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/*
|
|
* EMMA Mobile EV2 common clock framework support
|
|
*
|
|
* Copyright (C) 2013 Takashi Yoshii <takashi.yoshii.ze@renesas.com>
|
|
* Copyright (C) 2012 Magnus Damm
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/clkdev.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
|
|
/* EMEV2 SMU registers */
|
|
#define USIAU0_RSTCTRL 0x094
|
|
#define USIBU1_RSTCTRL 0x0ac
|
|
#define USIBU2_RSTCTRL 0x0b0
|
|
#define USIBU3_RSTCTRL 0x0b4
|
|
#define IIC0_RSTCTRL 0x0dc
|
|
#define IIC1_RSTCTRL 0x0e0
|
|
#define STI_RSTCTRL 0x124
|
|
#define STI_CLKSEL 0x688
|
|
|
|
static DEFINE_SPINLOCK(lock);
|
|
|
|
/* not pretty, but hey */
|
|
static void __iomem *smu_base;
|
|
|
|
static void __init emev2_smu_write(unsigned long value, int offs)
|
|
{
|
|
BUG_ON(!smu_base || (offs >= PAGE_SIZE));
|
|
writel_relaxed(value, smu_base + offs);
|
|
}
|
|
|
|
static const struct of_device_id smu_id[] __initconst = {
|
|
{ .compatible = "renesas,emev2-smu", },
|
|
{},
|
|
};
|
|
|
|
static void __init emev2_smu_init(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_find_matching_node(NULL, smu_id);
|
|
BUG_ON(!np);
|
|
smu_base = of_iomap(np, 0);
|
|
BUG_ON(!smu_base);
|
|
of_node_put(np);
|
|
|
|
/* setup STI timer to run on 32.768 kHz and deassert reset */
|
|
emev2_smu_write(0, STI_CLKSEL);
|
|
emev2_smu_write(1, STI_RSTCTRL);
|
|
|
|
/* deassert reset for UART0->UART3 */
|
|
emev2_smu_write(2, USIAU0_RSTCTRL);
|
|
emev2_smu_write(2, USIBU1_RSTCTRL);
|
|
emev2_smu_write(2, USIBU2_RSTCTRL);
|
|
emev2_smu_write(2, USIBU3_RSTCTRL);
|
|
|
|
/* deassert reset for IIC0->IIC1 */
|
|
emev2_smu_write(1, IIC0_RSTCTRL);
|
|
emev2_smu_write(1, IIC1_RSTCTRL);
|
|
}
|
|
|
|
static void __init emev2_smu_clkdiv_init(struct device_node *np)
|
|
{
|
|
u32 reg[2];
|
|
struct clk *clk;
|
|
const char *parent_name = of_clk_get_parent_name(np, 0);
|
|
if (WARN_ON(of_property_read_u32_array(np, "reg", reg, 2)))
|
|
return;
|
|
if (!smu_base)
|
|
emev2_smu_init();
|
|
clk = clk_register_divider(NULL, np->name, parent_name, 0,
|
|
smu_base + reg[0], reg[1], 8, 0, &lock);
|
|
of_clk_add_provider(np, of_clk_src_simple_get, clk);
|
|
clk_register_clkdev(clk, np->name, NULL);
|
|
pr_debug("## %s %s %p\n", __func__, np->name, clk);
|
|
}
|
|
CLK_OF_DECLARE(emev2_smu_clkdiv, "renesas,emev2-smu-clkdiv",
|
|
emev2_smu_clkdiv_init);
|
|
|
|
static void __init emev2_smu_gclk_init(struct device_node *np)
|
|
{
|
|
u32 reg[2];
|
|
struct clk *clk;
|
|
const char *parent_name = of_clk_get_parent_name(np, 0);
|
|
if (WARN_ON(of_property_read_u32_array(np, "reg", reg, 2)))
|
|
return;
|
|
if (!smu_base)
|
|
emev2_smu_init();
|
|
clk = clk_register_gate(NULL, np->name, parent_name, 0,
|
|
smu_base + reg[0], reg[1], 0, &lock);
|
|
of_clk_add_provider(np, of_clk_src_simple_get, clk);
|
|
clk_register_clkdev(clk, np->name, NULL);
|
|
pr_debug("## %s %s %p\n", __func__, np->name, clk);
|
|
}
|
|
CLK_OF_DECLARE(emev2_smu_gclk, "renesas,emev2-smu-gclk", emev2_smu_gclk_init);
|