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clk: at91: sckc: add support for SAM9X60 

Add support for SAM9X60's slow clock.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
alistair/sunxi64-5.4-dsi
Claudiu Beznea 2019-05-21 10:11:33 +00:00 committed by Stephen Boyd
parent b36d5cf753
commit 04bcc4275e
1 changed files with 74 additions and 0 deletions
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74
drivers/clk/at91/sckc.c
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@ -410,6 +410,80 @@ static void __init of_sama5d3_sckc_setup(struct device_node *np)
CLK_OF_DECLARE(sama5d3_clk_sckc, "atmel,sama5d3-sckc",
of_sama5d3_sckc_setup);
static const struct clk_slow_bits at91sam9x60_bits = {
.cr_osc32en = BIT(1),
.cr_osc32byp = BIT(2),
.cr_oscsel = BIT(24),
};
static void __init of_sam9x60_sckc_setup(struct device_node *np)
{
void __iomem *regbase = of_iomap(np, 0);
struct clk_hw_onecell_data *clk_data;
struct clk_hw *slow_rc, *slow_osc;
const char *xtal_name;
const char *parent_names[2] = { "slow_rc_osc", "slow_osc" };
bool bypass;
int ret;
if (!regbase)
return;
slow_rc = clk_hw_register_fixed_rate(NULL, parent_names[0], NULL, 0,
32768);
if (IS_ERR(slow_rc))
return;
xtal_name = of_clk_get_parent_name(np, 0);
if (!xtal_name)
goto unregister_slow_rc;
bypass = of_property_read_bool(np, "atmel,osc-bypass");
slow_osc = at91_clk_register_slow_osc(regbase, parent_names[1],
xtal_name, 5000000, bypass,
&at91sam9x60_bits);
if (IS_ERR(slow_osc))
goto unregister_slow_rc;
clk_data = kzalloc(sizeof(*clk_data) + (2 * sizeof(struct clk_hw *)),
GFP_KERNEL);
if (!clk_data)
goto unregister_slow_osc;
/* MD_SLCK and TD_SLCK. */
clk_data->num = 2;
clk_data->hws[0] = clk_hw_register_fixed_rate(NULL, "md_slck",
parent_names[0],
0, 32768);
if (IS_ERR(clk_data->hws[0]))
goto clk_data_free;
clk_data->hws[1] = at91_clk_register_sam9x5_slow(regbase, "td_slck",
parent_names, 2,
&at91sam9x60_bits);
if (IS_ERR(clk_data->hws[1]))
goto unregister_md_slck;
ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
if (WARN_ON(ret))
goto unregister_td_slck;
return;
unregister_td_slck:
clk_hw_unregister(clk_data->hws[1]);
unregister_md_slck:
clk_hw_unregister(clk_data->hws[0]);
clk_data_free:
kfree(clk_data);
unregister_slow_osc:
clk_hw_unregister(slow_osc);
unregister_slow_rc:
clk_hw_unregister(slow_rc);
}
CLK_OF_DECLARE(sam9x60_clk_sckc, "microchip,sam9x60-sckc",
of_sam9x60_sckc_setup);
static int clk_sama5d4_slow_osc_prepare(struct clk_hw *hw)
{
struct clk_sama5d4_slow_osc *osc = to_clk_sama5d4_slow_osc(hw);