unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

The fixes for the clock tree are mostly run-time bugs in clock drivers.

Browse source 
The fixes for TI DRA7 remove divide-by-zero errors. The recently merged
 AT91 clock driver fixes some bad error checking and the QCOM driver fix
 restores audio for that platform, a clear regression. A list iteration
 bug in the framework core was hit recently and is fixed up here. Finally
 a compilation warning is fixed for efm32gg, which is also a regression
 fix.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.14 (GNU/Linux)
 
 iQIcBAABAgAGBQJUII8eAAoJEDqPOy9afJhJiGMP+gMopk0EjwsgZ5+ak4eezwLO
 eBNnDZtEQNdZwdF7KZT3X5+8BoGtrl6cdw5WwKO2NtP+xyPjRLGI+WZcfoeH5bUM
 yZOEsYN8NCMuIFbUiRtxEfMXo0ZWIBy8iUtJmVfp+bgptcZ288ttiXcED+6R9c9v
 3dMToA5bsFisoo7zVJXMuM6HDg5T1ZXwqzjyjKJMHUC3xNrWo+XHCvsRgv5MFb8Y
 WDHAuUIHjr6zRqq6YU4kjXTaNHqNGPu1ubwsB8wwnGT4javs/zY+WofrkLomcKZm
 yjZF58FrON22rByPg+8mJVd6svCBZ0AQoK6GytkvjTVSVxo3PCrWufh8VhY3NHzY
 6zHqIVSC088dLrHZrmtYc4OqDBNmRX1Umgttq8RPdkO6yNvThsBKPvkKI2VSWmuQ
 4eQHp7bQfB6Nj4dJ+woLErGbjVOX9i9RT2HWHkEUYUNKcq8bC5wOaEL0RN+/bbO2
 Rbewj5x4XbAr72WcgelTsXVPEmh3zv4DK95UqbErry27IPt8ObSdK633RAAGcq2R
 j8WkYwQQQTzXuyYTzTYBCF9HnhQUF15NxNFHc9T/1NcrdgU9DrZuX93/7PgyOhg3
 5CNFmNrgiR/UYPGVPa7/ZRtWBFO76a+NSp5kQ5NtyLS6zwe2L/gHb7b6S/lSa/7Y
 sui0PxGOi6QmdKJDiuGz
 =dUkX
 -----END PGP SIGNATURE-----

Merge tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux

Pull clock layer fixes from Mike Turquette:
 "The fixes for the clock tree are mostly run-time bugs in clock
  drivers.

  The fixes for TI DRA7 remove divide-by-zero errors.  The recently
  merged AT91 clock driver fixes some bad error checking and the QCOM
  driver fix restores audio for that platform, a clear regression.  A
  list iteration bug in the framework core was hit recently and is fixed
  up here.  Finally a compilation warning is fixed for efm32gg, which is
  also a regression fix"

* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mike.turquette/linux:
  clk/efm32gg: fix dt init prototype
  clk: prevent erronous parsing of children during rate change
  clk: rockchip: Fix the clocks for i2c1 and i2c2
  clk: qcom: Fix sdc 144kHz frequency entry
  clk: at91: fix num_parents test in at91sam9260 slow clk implementation
  clk: ti: dra7-atl: Provide error check for incoming parameters in set_rate
  clk: ti: divider: Provide error check for incoming parameters in set_rate
This commit is contained in:
Linus Torvalds 2014-09-22 18:18:55 -07:00
commit 9478303619
7 changed files with 24 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/clk/at91/clk-slow.c
View file

@ -447,7 +447,7 @@ void __init of_at91sam9260_clk_slow_setup(struct device_node *np,
int i;
num_parents = of_count_phandle_with_args(np, "clocks", "#clock-cells");
if (num_parents <= 0 || num_parents > 1)
if (num_parents != 2)
return;
for (i = 0; i < num_parents; ++i) {

6
drivers/clk/clk-efm32gg.c
View file

@ -22,7 +22,7 @@ static struct clk_onecell_data clk_data = {
.clk_num = ARRAY_SIZE(clk),
};
static int __init efm32gg_cmu_init(struct device_node *np)
static void __init efm32gg_cmu_init(struct device_node *np)
{
int i;
void __iomem *base;
@ -33,7 +33,7 @@ static int __init efm32gg_cmu_init(struct device_node *np)
base = of_iomap(np, 0);
if (!base) {
pr_warn("Failed to map address range for efm32gg,cmu node\n");
return -EADDRNOTAVAIL;
return;
}
clk[clk_HFXO] = clk_register_fixed_rate(NULL, "HFXO", NULL,
@ -76,6 +76,6 @@ static int __init efm32gg_cmu_init(struct device_node *np)
clk[clk_HFPERCLKDAC0] = clk_register_gate(NULL, "HFPERCLK.DAC0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 17, 0, NULL);
return of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
}
CLK_OF_DECLARE(efm32ggcmu, "efm32gg,cmu", efm32gg_cmu_init);

7
drivers/clk/clk.c
View file

@ -1467,6 +1467,7 @@ static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long even
static void clk_change_rate(struct clk *clk)
{
struct clk *child;
struct hlist_node *tmp;
unsigned long old_rate;
unsigned long best_parent_rate = 0;
bool skip_set_rate = false;
@ -1502,7 +1503,11 @@ static void clk_change_rate(struct clk *clk)
if (clk->notifier_count && old_rate != clk->rate)
__clk_notify(clk, POST_RATE_CHANGE, old_rate, clk->rate);
hlist_for_each_entry(child, &clk->children, child_node) {
/*
* Use safe iteration, as change_rate can actually swap parents
* for certain clock types.
*/
hlist_for_each_entry_safe(child, tmp, &clk->children, child_node) {
/* Skip children who will be reparented to another clock */
if (child->new_parent && child->new_parent != clk)
continue;

2
drivers/clk/qcom/gcc-ipq806x.c
View file

@ -1095,7 +1095,7 @@ static struct clk_branch prng_clk = {
};
static const struct freq_tbl clk_tbl_sdc[] = {
{ 144000, P_PXO, 5, 18,625 },
{ 200000, P_PXO, 2, 2, 125 },
{ 400000, P_PLL8, 4, 1, 240 },
{ 16000000, P_PLL8, 4, 1, 6 },
{ 17070000, P_PLL8, 1, 2, 45 },

4
drivers/clk/rockchip/clk-rk3288.c
View file

@ -545,7 +545,7 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
GATE(PCLK_PWM, "pclk_pwm", "pclk_cpu", 0, RK3288_CLKGATE_CON(10), 0, GFLAGS),
GATE(PCLK_TIMER, "pclk_timer", "pclk_cpu", 0, RK3288_CLKGATE_CON(10), 1, GFLAGS),
GATE(PCLK_I2C0, "pclk_i2c0", "pclk_cpu", 0, RK3288_CLKGATE_CON(10), 2, GFLAGS),
GATE(PCLK_I2C1, "pclk_i2c1", "pclk_cpu", 0, RK3288_CLKGATE_CON(10), 3, GFLAGS),
GATE(PCLK_I2C2, "pclk_i2c2", "pclk_cpu", 0, RK3288_CLKGATE_CON(10), 3, GFLAGS),
GATE(0, "pclk_ddrupctl0", "pclk_cpu", 0, RK3288_CLKGATE_CON(10), 14, GFLAGS),
GATE(0, "pclk_publ0", "pclk_cpu", 0, RK3288_CLKGATE_CON(10), 15, GFLAGS),
GATE(0, "pclk_ddrupctl1", "pclk_cpu", 0, RK3288_CLKGATE_CON(11), 0, GFLAGS),
@ -603,7 +603,7 @@ static struct rockchip_clk_branch rk3288_clk_branches[] __initdata = {
GATE(PCLK_I2C4, "pclk_i2c4", "pclk_peri", 0, RK3288_CLKGATE_CON(6), 15, GFLAGS),
GATE(PCLK_UART3, "pclk_uart3", "pclk_peri", 0, RK3288_CLKGATE_CON(6), 11, GFLAGS),
GATE(PCLK_UART4, "pclk_uart4", "pclk_peri", 0, RK3288_CLKGATE_CON(6), 12, GFLAGS),
GATE(PCLK_I2C2, "pclk_i2c2", "pclk_peri", 0, RK3288_CLKGATE_CON(6), 13, GFLAGS),
GATE(PCLK_I2C1, "pclk_i2c1", "pclk_peri", 0, RK3288_CLKGATE_CON(6), 13, GFLAGS),
GATE(PCLK_I2C3, "pclk_i2c3", "pclk_peri", 0, RK3288_CLKGATE_CON(6), 14, GFLAGS),
GATE(PCLK_SARADC, "pclk_saradc", "pclk_peri", 0, RK3288_CLKGATE_CON(7), 1, GFLAGS),
GATE(PCLK_TSADC, "pclk_tsadc", "pclk_peri", 0, RK3288_CLKGATE_CON(7), 2, GFLAGS),

6
drivers/clk/ti/clk-dra7-atl.c
View file

@ -139,9 +139,13 @@ static long atl_clk_round_rate(struct clk_hw *hw, unsigned long rate,
static int atl_clk_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct dra7_atl_desc *cdesc = to_atl_desc(hw);
struct dra7_atl_desc *cdesc;
u32 divider;
if (!hw || !rate)
return -EINVAL;
cdesc = to_atl_desc(hw);
divider = ((parent_rate + rate / 2) / rate) - 1;
if (divider > DRA7_ATL_DIVIDER_MASK)
divider = DRA7_ATL_DIVIDER_MASK;

7
drivers/clk/ti/divider.c
View file

@ -211,11 +211,16 @@ static long ti_clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
static int ti_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_divider *divider = to_clk_divider(hw);
struct clk_divider *divider;
unsigned int div, value;
unsigned long flags = 0;
u32 val;
if (!hw || !rate)
return -EINVAL;
divider = to_clk_divider(hw);
div = DIV_ROUND_UP(parent_rate, rate);
value = _get_val(divider, div);