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platform: starfive: get I2C offset address from clocks property

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The current code gets the I2C offset address using the device tree node
name: it get the I2C device index from the 4th character in the node
name (for example, "i2c5" -> i2c device 5). However, the device tree
node's name in U-Boot is actually just "i2c" without the number, so the
current code cannot be used with the device tree from U-Boot.

Get the I2C offset address from the "clocks" property instead.

Signed-off-by: Nam Cao <namcao@linutronix.de>
Reviewed-by: Minda Chen <minda.chen@starfivetech.com>
Tested-by: Minda Chen <minda.chen@starfivetech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Nam Cao 2024-02-22 09:16:15 +01:00 • committed by Anup Patel
parent 034af1f85e
commit 4d8569df7b
1 changed files with 14 additions and 10 deletions
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24
platform/generic/starfive/jh7110.c
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@ -29,7 +29,7 @@ struct pmic {
struct jh7110 {
u64 pmu_reg_base;
u64 clk_reg_base;
u32 i2c_index;
u32 i2c_clk_offset;
};
static struct pmic pmic_inst;
@ -67,7 +67,6 @@ static u32 selected_hartid = -1;
#define AXP15060_POWER_OFF_BIT BIT(7)
#define AXP15060_RESET_BIT BIT(6)
#define I2C_APB_CLK_OFFSET 0x228
#define I2C_APB_CLK_ENABLE_BIT BIT(31)
static int pm_system_reset_check(u32 type, u32 reason)
@ -163,10 +162,7 @@ static void pmic_i2c_clk_enable(void)
unsigned long clock_base;
unsigned int val;
clock_base = jh7110_inst.clk_reg_base +
I2C_APB_CLK_OFFSET +
(jh7110_inst.i2c_index << 2);
clock_base = jh7110_inst.clk_reg_base + jh7110_inst.i2c_clk_offset;
val = readl((void *)clock_base);
if (!val)
@ -241,7 +237,8 @@ static struct fdt_reset fdt_reset_pmic = {
static int starfive_jh7110_inst_init(void *fdt)
{
int noff, rc = 0;
const char *name;
const fdt32_t *val;
int len;
u64 addr;
noff = fdt_node_offset_by_compatible(fdt, -1, "starfive,jh7110-pmu");
@ -261,9 +258,16 @@ static int starfive_jh7110_inst_init(void *fdt)
}
if (pmic_inst.adapter) {
name = fdt_get_name(fdt, pmic_inst.adapter->id, NULL);
if (!sbi_strncmp(name, "i2c", 3))
jh7110_inst.i2c_index = name[3] - '0';
/*
* The clocks property looks like this:
* clocks = <&syscrg JH7110_SYSCLK_I2C5_APB>;
*
* So, check that the length is 8 bytes, and get
* the offset from the second value.
*/
val = fdt_getprop(fdt, pmic_inst.adapter->id, "clocks", &len);
if (val && len == 8)
jh7110_inst.i2c_clk_offset = fdt32_to_cpu(val[1]) << 2;
else
rc = SBI_EINVAL;
}